"""
Admin Routes
============

Admin panel: users, recommendations, fees, calendar management.
"""

import os
import csv
import json
import re
import logging
import secrets
import string
from io import StringIO
from datetime import datetime, timedelta
from decimal import Decimal

from flask import render_template, request, redirect, url_for, flash, jsonify, Response
from flask_login import login_required, current_user
from werkzeug.security import generate_password_hash

from . import bp
from database import (
    SessionLocal, User, Company, CompanyRecommendation,
    MembershipFee, MembershipFeeConfig, NordaEvent, EventAttendee,
    SystemRole, UserCompany
)
from utils.decorators import role_required
from utils.helpers import sanitize_html
import gemini_service

# Logger
logger = logging.getLogger(__name__)

# Polish month names for fees
MONTHS_PL = [
    (1, 'Styczen'), (2, 'Luty'), (3, 'Marzec'), (4, 'Kwiecien'),
    (5, 'Maj'), (6, 'Czerwiec'), (7, 'Lipiec'), (8, 'Sierpien'),
    (9, 'Wrzesien'), (10, 'Pazdziernik'), (11, 'Listopad'), (12, 'Grudzien')
]


# ============================================================
# RECOMMENDATIONS ADMIN ROUTES
# ============================================================

@bp.route('/recommendations')
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_recommendations():
    """Admin panel for recommendations moderation"""
    db = SessionLocal()
    try:
        recommendations = db.query(CompanyRecommendation).order_by(
            CompanyRecommendation.created_at.desc()
        ).all()

        pending_recommendations = db.query(CompanyRecommendation).filter(
            CompanyRecommendation.status == 'pending'
        ).order_by(CompanyRecommendation.created_at.desc()).all()

        total_recommendations = len(recommendations)
        pending_count = len(pending_recommendations)
        approved_count = db.query(CompanyRecommendation).filter(
            CompanyRecommendation.status == 'approved'
        ).count()
        rejected_count = db.query(CompanyRecommendation).filter(
            CompanyRecommendation.status == 'rejected'
        ).count()

        logger.info(f"Admin {current_user.email} accessed recommendations panel - {pending_count} pending")

        return render_template(
            'admin/recommendations.html',
            recommendations=recommendations,
            pending_recommendations=pending_recommendations,
            total_recommendations=total_recommendations,
            pending_count=pending_count,
            approved_count=approved_count,
            rejected_count=rejected_count
        )
    finally:
        db.close()


@bp.route('/recommendations/<int:recommendation_id>/approve', methods=['POST'])
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_recommendation_approve(recommendation_id):
    """Approve a recommendation"""
    db = SessionLocal()
    try:
        recommendation = db.query(CompanyRecommendation).filter(
            CompanyRecommendation.id == recommendation_id
        ).first()

        if not recommendation:
            return jsonify({'success': False, 'error': 'Rekomendacja nie istnieje'}), 404

        recommendation.status = 'approved'
        recommendation.moderated_by = current_user.id
        recommendation.moderated_at = datetime.utcnow()
        recommendation.rejection_reason = None
        db.commit()

        logger.info(f"Admin {current_user.email} approved recommendation #{recommendation_id}")
        return jsonify({
            'success': True,
            'message': 'Rekomendacja zatwierdzona'
        })
    finally:
        db.close()


@bp.route('/recommendations/<int:recommendation_id>/reject', methods=['POST'])
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_recommendation_reject(recommendation_id):
    """Reject a recommendation"""
    db = SessionLocal()
    try:
        recommendation = db.query(CompanyRecommendation).filter(
            CompanyRecommendation.id == recommendation_id
        ).first()

        if not recommendation:
            return jsonify({'success': False, 'error': 'Rekomendacja nie istnieje'}), 404

        rejection_reason = request.json.get('reason', '') if request.is_json else request.form.get('reason', '')

        recommendation.status = 'rejected'
        recommendation.moderated_by = current_user.id
        recommendation.moderated_at = datetime.utcnow()
        recommendation.rejection_reason = rejection_reason.strip() if rejection_reason else None
        db.commit()

        logger.info(f"Admin {current_user.email} rejected recommendation #{recommendation_id}")
        return jsonify({
            'success': True,
            'message': 'Rekomendacja odrzucona'
        })
    finally:
        db.close()


# ============================================================
# USER MANAGEMENT ADMIN ROUTES
# ============================================================

@bp.route('/users')
@login_required
@role_required(SystemRole.ADMIN)
def admin_users():
    """Admin panel for user management"""
    db = SessionLocal()
    try:
        users = db.query(User).order_by(User.created_at.desc()).all()
        companies = db.query(Company).order_by(Company.name).all()

        total_users = len(users)
        admin_count = sum(1 for u in users if u.has_role(SystemRole.ADMIN))
        verified_count = sum(1 for u in users if u.is_verified)
        unverified_count = total_users - verified_count
        pending_company_count = sum(1 for u in users if u.company_id and u.company_role == 'NONE')

        logger.info(f"Admin {current_user.email} accessed users panel - {total_users} users")

        locked_count = sum(1 for u in users if u.locked_until and u.locked_until > datetime.utcnow())

        return render_template(
            'admin/users.html',
            users=users,
            companies=companies,
            total_users=total_users,
            admin_count=admin_count,
            verified_count=verified_count,
            unverified_count=unverified_count,
            pending_company_count=pending_company_count,
            locked_count=locked_count,
            now=datetime.utcnow()
        )
    finally:
        db.close()


@bp.route('/users/<int:user_id>/unlock', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_user_unlock(user_id):
    """Unlock a locked user account"""
    db = SessionLocal()
    try:
        user = db.query(User).get(user_id)
        if not user:
            return jsonify({'success': False, 'error': 'Użytkownik nie znaleziony'}), 404
        user.failed_login_attempts = 0
        user.locked_until = None
        db.commit()
        return jsonify({'success': True, 'message': f'Konto {user.email} odblokowane'})
    finally:
        db.close()


@bp.route('/users/add', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_user_add():
    """Create a new user (admin only)"""
    db = SessionLocal()
    try:
        data = request.get_json() or {}

        email = data.get('email', '').strip().lower()
        if not email:
            return jsonify({'success': False, 'error': 'Email jest wymagany'}), 400

        existing_user = db.query(User).filter(User.email == email).first()
        if existing_user:
            return jsonify({'success': False, 'error': 'Użytkownik z tym adresem email już istnieje'}), 400

        password_chars = string.ascii_letters + string.digits + "!@#$%^&*"
        generated_password = ''.join(secrets.choice(password_chars) for _ in range(16))
        password_hash = generate_password_hash(generated_password, method='pbkdf2:sha256')

        new_user = User(
            email=email,
            password_hash=password_hash,
            name=data.get('name', '').strip() or None,
            company_id=data.get('company_id') or None,
            is_verified=data.get('is_verified', True),
            is_active=True
        )

        db.add(new_user)
        role_name = data.get('role', 'MEMBER')
        try:
            new_user.set_role(SystemRole[role_name])
        except KeyError:
            new_user.set_role(SystemRole.MEMBER)
        db.commit()
        db.refresh(new_user)

        logger.info(f"Admin {current_user.email} created new user: {email} (ID: {new_user.id})")

        return jsonify({
            'success': True,
            'user_id': new_user.id,
            'generated_password': generated_password,
            'message': f'Użytkownik {email} został utworzony'
        })

    except Exception as e:
        db.rollback()
        logger.error(f"Error creating user: {e}")
        return jsonify({'success': False, 'error': 'Błąd podczas tworzenia użytkownika'}), 500
    finally:
        db.close()


@bp.route('/users/<int:user_id>/toggle-admin', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_user_toggle_admin(user_id):
    """Toggle admin status for a user"""
    if user_id == current_user.id:
        return jsonify({'success': False, 'error': 'Nie możesz zmienić własnych uprawnień'}), 400

    db = SessionLocal()
    try:
        user = db.query(User).filter(User.id == user_id).first()
        if not user:
            return jsonify({'success': False, 'error': 'Użytkownik nie znaleziony'}), 404

        if user.has_role(SystemRole.ADMIN):
            user.set_role(SystemRole.MEMBER)
        else:
            user.set_role(SystemRole.ADMIN)
        db.commit()

        is_now_admin = user.has_role(SystemRole.ADMIN)
        logger.info(f"Admin {current_user.email} {'granted' if is_now_admin else 'revoked'} admin for user {user.email}")

        return jsonify({
            'success': True,
            'is_admin': is_now_admin,  # Backward compat for frontend
            'role': user.role,
            'message': f"{'Nadano' if is_now_admin else 'Odebrano'} uprawnienia admina"
        })
    finally:
        db.close()


@bp.route('/users/<int:user_id>/toggle-verified', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_user_toggle_verified(user_id):
    """Toggle verified status for a user"""
    db = SessionLocal()
    try:
        user = db.query(User).filter(User.id == user_id).first()
        if not user:
            return jsonify({'success': False, 'error': 'Użytkownik nie znaleziony'}), 404

        user.is_verified = not user.is_verified
        if user.is_verified:
            user.verified_at = datetime.utcnow()
        else:
            user.verified_at = None
        db.commit()

        logger.info(f"Admin {current_user.email} {'verified' if user.is_verified else 'unverified'} user {user.email}")

        return jsonify({
            'success': True,
            'is_verified': user.is_verified,
            'message': f"Użytkownik {'zweryfikowany' if user.is_verified else 'niezweryfikowany'}"
        })
    finally:
        db.close()


@bp.route('/users/<int:user_id>/toggle-rada-member', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_user_toggle_rada_member(user_id):
    """Toggle Rada Izby (Board Council) membership for a user"""
    db = SessionLocal()
    try:
        user = db.query(User).filter(User.id == user_id).first()
        if not user:
            return jsonify({'success': False, 'error': 'Użytkownik nie znaleziony'}), 404

        user.is_rada_member = not user.is_rada_member
        db.commit()

        logger.info(f"Admin {current_user.email} {'added' if user.is_rada_member else 'removed'} user {user.email} {'to' if user.is_rada_member else 'from'} Rada Izby")

        return jsonify({
            'success': True,
            'is_rada_member': user.is_rada_member,
            'message': f"Użytkownik {'dodany do' if user.is_rada_member else 'usunięty z'} Rady Izby"
        })
    finally:
        db.close()


@bp.route('/users/<int:user_id>/update', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_user_update(user_id):
    """Update user data (name, email)"""
    db = SessionLocal()
    try:
        user = db.query(User).filter(User.id == user_id).first()
        if not user:
            return jsonify({'success': False, 'error': 'Użytkownik nie znaleziony'}), 404

        data = request.get_json() or {}

        if 'name' in data:
            user.name = data['name'].strip() if data['name'] else None

        if 'email' in data:
            new_email = data['email'].strip().lower()
            if new_email and new_email != user.email:
                existing = db.query(User).filter(User.email == new_email, User.id != user_id).first()
                if existing:
                    return jsonify({'success': False, 'error': 'Ten email jest już używany'}), 400
                user.email = new_email

        if 'phone' in data:
            user.phone = data['phone'].strip() if data['phone'] else None

        db.commit()

        logger.info(f"Admin {current_user.email} updated user {user.email}: name={user.name}, phone={user.phone}")

        return jsonify({
            'success': True,
            'user': {
                'id': user.id,
                'name': user.name,
                'email': user.email,
                'phone': user.phone
            },
            'message': 'Dane użytkownika zaktualizowane'
        })
    except Exception as e:
        db.rollback()
        logger.error(f"Error updating user {user_id}: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500
    finally:
        db.close()


@bp.route('/users/<int:user_id>/assign-company', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_user_assign_company(user_id):
    """Assign a company to a user"""
    db = SessionLocal()
    try:
        user = db.query(User).filter(User.id == user_id).first()
        if not user:
            return jsonify({'success': False, 'error': 'Użytkownik nie znaleziony'}), 404

        data = request.get_json() or {}
        company_id = data.get('company_id')

        if company_id:
            company = db.query(Company).filter(Company.id == company_id).first()
            if not company:
                return jsonify({'success': False, 'error': 'Firma nie znaleziona'}), 404
            user.company_id = company_id
            company_name = company.name

            # Sync user_companies table
            existing_uc = db.query(UserCompany).filter_by(user_id=user.id, company_id=company_id).first()
            if not existing_uc:
                # Remove old primary associations
                db.query(UserCompany).filter_by(user_id=user.id, is_primary=True).update({'is_primary': False})
                uc = UserCompany(user_id=user.id, company_id=company_id, role='MANAGER', is_primary=True)
                db.add(uc)
            else:
                existing_uc.is_primary = True

            # Auto-set Norda membership when linking to active company
            if company.status == 'active':
                user.is_norda_member = True
        else:
            user.company_id = None
            company_name = None
            # Remove primary flag from all user_companies
            db.query(UserCompany).filter_by(user_id=user.id, is_primary=True).update({'is_primary': False})
            # Clear Norda membership if user has no remaining active company links
            remaining = db.query(UserCompany).filter(
                UserCompany.user_id == user.id,
                UserCompany.company_id != None
            ).join(Company).filter(Company.status == 'active').first()
            if not remaining:
                user.is_norda_member = False

        db.commit()

        logger.info(f"Admin {current_user.email} assigned company '{company_name}' to user {user.email}")

        return jsonify({
            'success': True,
            'company_name': company_name,
            'message': f"Przypisano firmę: {company_name}" if company_name else "Odłączono od firmy"
        })
    finally:
        db.close()


@bp.route('/users/list-all')
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_users_list_all():
    """Get all users as JSON (for dropdowns)"""
    db = SessionLocal()
    try:
        users = db.query(User).order_by(User.name, User.email).all()
        return jsonify({
            'success': True,
            'users': [{
                'id': u.id,
                'name': u.name,
                'email': u.email,
                'company_id': u.company_id
            } for u in users]
        })
    finally:
        db.close()


@bp.route('/users/<int:user_id>/delete', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_user_delete(user_id):
    """Delete a user and all dependent records."""
    from sqlalchemy import text

    if user_id == current_user.id:
        return jsonify({'success': False, 'error': 'Nie możesz usunąć własnego konta'}), 400

    db = SessionLocal()
    try:
        user = db.query(User).filter(User.id == user_id).first()
        if not user:
            return jsonify({'success': False, 'error': 'Użytkownik nie znaleziony'}), 404

        email = user.email

        # Expunge user from ORM session to prevent backref cascades
        db.expunge(user)

        # Clean up FK references with NO ACTION that would block deletion.
        # Tables with CASCADE in DB are handled automatically.

        # 1) Nullable FKs → SET NULL
        nullable_fk_updates = [
            "UPDATE announcements SET author_id = NULL WHERE author_id = :uid",
            "UPDATE board_documents SET uploaded_by = NULL WHERE uploaded_by = :uid",
            "UPDATE board_documents SET updated_by = NULL WHERE updated_by = :uid",
            "UPDATE board_meetings SET chairperson_id = NULL WHERE chairperson_id = :uid",
            "UPDATE board_meetings SET secretary_id = NULL WHERE secretary_id = :uid",
            "UPDATE board_meetings SET created_by = NULL WHERE created_by = :uid",
            "UPDATE board_meetings SET updated_by = NULL WHERE updated_by = :uid",
            "UPDATE classified_questions SET answered_by = NULL WHERE answered_by = :uid",
            "UPDATE company_data_requests SET reviewed_by_id = NULL WHERE reviewed_by_id = :uid",
            "UPDATE company_recommendations SET moderated_by = NULL WHERE moderated_by = :uid",
            "UPDATE forum_topics SET edited_by = NULL WHERE edited_by = :uid",
            "UPDATE forum_topics SET deleted_by = NULL WHERE deleted_by = :uid",
            "UPDATE forum_topics SET status_changed_by = NULL WHERE status_changed_by = :uid",
            "UPDATE forum_replies SET edited_by = NULL WHERE edited_by = :uid",
            "UPDATE forum_replies SET deleted_by = NULL WHERE deleted_by = :uid",
            "UPDATE forum_replies SET marked_as_solution_by = NULL WHERE marked_as_solution_by = :uid",
            "UPDATE forum_reports SET reviewed_by = NULL WHERE reviewed_by = :uid",
            "UPDATE it_audits SET audited_by = NULL WHERE audited_by = :uid",
            "UPDATE maturity_assessments SET assessed_by_user_id = NULL WHERE assessed_by_user_id = :uid",
            "UPDATE ai_enrichment_proposals SET reviewed_by_id = NULL WHERE reviewed_by_id = :uid",
            "UPDATE membership_applications SET reviewed_by_id = NULL WHERE reviewed_by_id = :uid",
            "UPDATE membership_applications SET proposed_changes_by_id = NULL WHERE proposed_changes_by_id = :uid",
            "UPDATE membership_fee_config SET created_by = NULL WHERE created_by = :uid",
            "UPDATE membership_fees SET recorded_by = NULL WHERE recorded_by = :uid",
            "UPDATE norda_events SET created_by = NULL WHERE created_by = :uid",
            "UPDATE user_company_permissions SET granted_by_id = NULL WHERE granted_by_id = :uid",
            "UPDATE zopk_company_links SET created_by = NULL WHERE created_by = :uid",
            "UPDATE zopk_knowledge_chunks SET verified_by = NULL WHERE verified_by = :uid",
            "UPDATE zopk_knowledge_extraction_jobs SET triggered_by_user = NULL WHERE triggered_by_user = :uid",
            "UPDATE zopk_knowledge_relations SET verified_by = NULL WHERE verified_by = :uid",
            "UPDATE zopk_milestones SET verified_by = NULL WHERE verified_by = :uid",
            "UPDATE zopk_news SET moderated_by = NULL WHERE moderated_by = :uid",
            "UPDATE zopk_news_fetch_jobs SET triggered_by_user = NULL WHERE triggered_by_user = :uid",
            "UPDATE zopk_resources SET uploaded_by = NULL WHERE uploaded_by = :uid",
        ]

        # 2) NOT NULL FKs without CASCADE → DELETE records
        not_null_fk_deletes = [
            "DELETE FROM ai_api_costs WHERE user_id = :uid",
            "DELETE FROM ai_chat_feedback WHERE user_id = :uid",
            "DELETE FROM ai_usage_logs WHERE user_id = :uid",
            "DELETE FROM forum_edit_history WHERE editor_id = :uid",
            "DELETE FROM forum_attachments WHERE uploaded_by = :uid",
            "DELETE FROM forum_reports WHERE reporter_id = :uid",
            "DELETE FROM forum_replies WHERE author_id = :uid",
            "DELETE FROM forum_topics WHERE author_id = :uid",
        ]

        for sql in nullable_fk_updates + not_null_fk_deletes:
            try:
                db.execute(text(sql), {"uid": user_id})
            except Exception:
                pass  # Table may not exist yet

        # Use raw SQL to bypass ORM relationship cascades that try SET NULL
        db.execute(text("DELETE FROM users WHERE id = :uid"), {"uid": user_id})
        db.commit()

        logger.info(f"Admin {current_user.email} deleted user {email}")

        return jsonify({
            'success': True,
            'message': f"Użytkownik {email} został usunięty"
        })
    except Exception as e:
        db.rollback()
        logger.error(f"Error deleting user {user_id}: {e}")
        return jsonify({'success': False, 'error': f'Błąd: {str(e)}'}), 500
    finally:
        db.close()


@bp.route('/users/<int:user_id>/reset-password', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_user_reset_password(user_id):
    """Generate password reset token and optionally send email"""
    db = SessionLocal()
    try:
        user = db.query(User).filter(User.id == user_id).first()
        if not user:
            return jsonify({'success': False, 'error': 'Użytkownik nie znaleziony'}), 404

        reset_token = secrets.token_urlsafe(32)
        user.reset_token = reset_token
        user.reset_token_expires = datetime.now() + timedelta(hours=24)
        db.commit()

        base_url = os.getenv('APP_URL', 'https://nordabiznes.pl')
        reset_url = f"{base_url}/reset-password/{reset_token}"

        logger.info(f"Admin {current_user.email} generated reset token for user {user.email}: {reset_token[:8]}...")

        # Check if admin requested sending email
        data = request.get_json(silent=True) or {}
        send_email = data.get('send_email', False)
        email_sent = False

        if send_email:
            import email_service
            if email_service.is_configured():
                email_sent = email_service.send_password_reset_email(user.email, reset_url, admin_initiated=True)
                if email_sent:
                    logger.info(f"Password reset email sent to {user.email} by admin {current_user.email}")
                else:
                    logger.warning(f"Failed to send password reset email to {user.email}")
            else:
                logger.warning("Email service not configured, cannot send reset email")

        message = "Email z linkiem do resetu hasła wysłany" if email_sent else "Link do resetu hasła wygenerowany (ważny 24 godziny)"

        return jsonify({
            'success': True,
            'reset_url': reset_url,
            'email_sent': email_sent,
            'message': message
        })
    finally:
        db.close()


@bp.route('/users/<int:user_id>/set-password', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_user_set_password(user_id):
    """Admin directly sets a new password for a user"""
    db = SessionLocal()
    try:
        user = db.query(User).filter(User.id == user_id).first()
        if not user:
            return jsonify({'success': False, 'error': 'Użytkownik nie znaleziony'}), 404

        data = request.get_json()
        new_password = data.get('password', '').strip()

        if len(new_password) < 8:
            return jsonify({'success': False, 'error': 'Hasło musi mieć min. 8 znaków'}), 400

        user.password_hash = generate_password_hash(new_password, method='pbkdf2:sha256')
        user.reset_token = None
        user.reset_token_expires = None
        db.commit()

        logger.info(f"Admin {current_user.email} set new password for user {user.email}")
        return jsonify({'success': True, 'message': 'Hasło zostało zmienione'})
    except Exception as e:
        db.rollback()
        logger.error(f"Error setting password for user {user_id}: {e}")
        return jsonify({'success': False, 'error': f'Błąd: {str(e)}'}), 500
    finally:
        db.close()


# ============================================================
# MEMBERSHIP FEES ADMIN
# ============================================================

@bp.route('/fees')
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_fees():
    """Admin panel for membership fee management"""
    db = SessionLocal()
    try:
        from sqlalchemy import func, case

        year = request.args.get('year', datetime.now().year, type=int)
        month = request.args.get('month', type=int)
        status_filter = request.args.get('status', '')

        companies = db.query(Company).filter(
            Company.status == 'active',
            Company.fee_included_in_parent != True
        ).order_by(Company.name).all()

        fee_query = db.query(MembershipFee).filter(MembershipFee.fee_year == year)
        if month:
            fee_query = fee_query.filter(MembershipFee.fee_month == month)

        fees = {(f.company_id, f.fee_month): f for f in fee_query.all()}

        companies_fees = []
        for company in companies:
            if month:
                fee = fees.get((company.id, month))
                companies_fees.append({
                    'company': company,
                    'fee': fee,
                    'status': fee.status if fee else 'brak'
                })
            else:
                company_data = {'company': company, 'months': {}, 'monthly_rate': 0, 'has_data': False, 'reminder': None}
                has_unpaid = False
                for m in range(1, 13):
                    fee = fees.get((company.id, m))
                    company_data['months'][m] = fee
                    if fee and fee.amount:
                        company_data['has_data'] = True
                        if not company_data['monthly_rate']:
                            company_data['monthly_rate'] = int(fee.amount)
                        if fee.status in ('pending', 'partial', 'overdue'):
                            has_unpaid = True
                # Find last reminder message for this company (to any linked user)
                if has_unpaid:
                    from database import PrivateMessage, UserCompany
                    company_user_ids = [cu.user_id for cu in db.query(UserCompany).filter(UserCompany.company_id == company.id).all()]
                    if company_user_ids:
                        last_reminder = db.query(PrivateMessage).filter(
                            PrivateMessage.recipient_id.in_(company_user_ids),
                            PrivateMessage.subject.ilike('%przypomnienie o składce%'),
                        ).order_by(PrivateMessage.created_at.desc()).first()
                        if last_reminder:
                            company_data['reminder'] = {
                                'sent_at': last_reminder.created_at,
                                'is_read': last_reminder.is_read,
                                'read_at': last_reminder.read_at,
                            }
                companies_fees.append(company_data)

        # Sort: companies with fee data first, then without
        if not month:
            companies_fees.sort(key=lambda cf: (0 if cf.get('has_data') else 1, cf['company'].name))

        if status_filter:
            if month:
                if status_filter == 'paid':
                    companies_fees = [cf for cf in companies_fees if cf.get('status') == 'paid']
                elif status_filter == 'pending':
                    companies_fees = [cf for cf in companies_fees if cf.get('status') in ('pending', 'brak')]
                elif status_filter == 'overdue':
                    companies_fees = [cf for cf in companies_fees if cf.get('status') == 'overdue']
            else:
                # Yearly view filters
                if status_filter == 'paid':
                    # Fully paid all year — all months with records are paid
                    companies_fees = [cf for cf in companies_fees if all(
                        cf['months'].get(m) and cf['months'][m].status == 'paid' for m in range(1, 13)
                        if cf['months'].get(m)
                    ) and any(cf['months'].get(m) for m in range(1, 13))]
                elif status_filter == 'partial':
                    # Partially paid: has mix of paid/unpaid months OR has underpaid months (partial status)
                    companies_fees = [cf for cf in companies_fees if (
                        (any(cf['months'].get(m) and cf['months'][m].status == 'paid' for m in range(1, 13)) and
                         any(cf['months'].get(m) and cf['months'][m].status in ('pending', 'overdue') for m in range(1, 13))) or
                        any(cf['months'].get(m) and cf['months'][m].status == 'partial' for m in range(1, 13))
                    )]
                elif status_filter == 'none':
                    # No payments at all — no month is paid or partial
                    companies_fees = [cf for cf in companies_fees if
                        any(cf['months'].get(m) for m in range(1, 13)) and
                        not any(cf['months'].get(m) and cf['months'][m].status in ('paid', 'partial') for m in range(1, 13))
                    ]

        total_companies = len(companies)
        if month:
            month_fees = [cf.get('fee') for cf in companies_fees if cf.get('fee')]
            paid_count = sum(1 for f in month_fees if f and f.status == 'paid')
            pending_count = total_companies - paid_count
            total_due = sum(float(f.amount) for f in month_fees if f) if month_fees else Decimal(0)
            total_paid = sum(float(f.amount_paid or 0) for f in month_fees if f) if month_fees else Decimal(0)
        else:
            all_fees = list(fees.values())
            paid_count = sum(1 for f in all_fees if f.status == 'paid')
            pending_count = len(all_fees) - paid_count
            total_due = sum(float(f.amount) for f in all_fees) if all_fees else Decimal(0)
            total_paid = sum(float(f.amount_paid or 0) for f in all_fees) if all_fees else Decimal(0)

        fee_config = db.query(MembershipFeeConfig).filter(
            MembershipFeeConfig.scope == 'global',
            MembershipFeeConfig.valid_until == None
        ).first()
        default_fee = float(fee_config.monthly_amount) if fee_config else 100.00

        return render_template(
            'admin/fees.html',
            companies_fees=companies_fees,
            year=year,
            month=month,
            status_filter=status_filter,
            total_companies=total_companies,
            paid_count=paid_count,
            pending_count=pending_count,
            total_due=total_due,
            total_paid=total_paid,
            default_fee=default_fee,
            years=list(range(2022, datetime.now().year + 2)),
            months=MONTHS_PL
        )
    finally:
        db.close()


@bp.route('/fees/generate', methods=['POST'])
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_fees_generate():
    """Generate fee records for all companies for a given month"""
    db = SessionLocal()
    try:
        year = request.form.get('year', type=int)
        month = request.form.get('month', type=int)

        if not year or not month:
            return jsonify({'success': False, 'error': 'Brak roku lub miesiaca'}), 400

        fee_config = db.query(MembershipFeeConfig).filter(
            MembershipFeeConfig.scope == 'global',
            MembershipFeeConfig.valid_until == None
        ).first()
        default_fee = fee_config.monthly_amount if fee_config else 100.00

        companies = db.query(Company).filter(
            Company.status == 'active',
            Company.fee_included_in_parent != True
        ).all()

        created = 0
        for company in companies:
            existing = db.query(MembershipFee).filter(
                MembershipFee.company_id == company.id,
                MembershipFee.fee_year == year,
                MembershipFee.fee_month == month
            ).first()

            if not existing:
                fee = MembershipFee(
                    company_id=company.id,
                    fee_year=year,
                    fee_month=month,
                    amount=default_fee,
                    status='pending'
                )
                db.add(fee)
                created += 1

        db.commit()

        return jsonify({
            'success': True,
            'message': f'Utworzono {created} rekordow skladek'
        })
    except Exception as e:
        db.rollback()
        logger.error(f"Error generating fees: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500
    finally:
        db.close()


@bp.route('/fees/<int:fee_id>/mark-paid', methods=['POST'])
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_fees_mark_paid(fee_id):
    """Mark a fee as paid"""
    db = SessionLocal()
    try:
        fee = db.query(MembershipFee).filter(MembershipFee.id == fee_id).first()
        if not fee:
            return jsonify({'success': False, 'error': 'Nie znaleziono skladki'}), 404

        amount_paid = request.form.get('amount_paid', type=float)
        payment_date = request.form.get('payment_date')
        payment_method = request.form.get('payment_method', 'transfer')
        payment_reference = request.form.get('payment_reference', '')
        notes = request.form.get('notes', '')

        fee.amount_paid = amount_paid or float(fee.amount)
        fee.payment_date = datetime.strptime(payment_date, '%Y-%m-%d').date() if payment_date else datetime.now().date()
        fee.payment_method = payment_method
        fee.payment_reference = payment_reference
        fee.notes = notes
        fee.recorded_by = current_user.id
        fee.recorded_at = datetime.now()

        if fee.amount_paid >= float(fee.amount):
            fee.status = 'paid'
        elif fee.amount_paid > 0:
            fee.status = 'partial'

        db.commit()

        return jsonify({
            'success': True,
            'message': 'Skladka zostala zarejestrowana'
        })
    except Exception as e:
        db.rollback()
        logger.error(f"Error marking fee as paid: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500
    finally:
        db.close()


@bp.route('/fees/bulk-mark-paid', methods=['POST'])
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_fees_bulk_mark_paid():
    """Bulk mark fees as paid"""
    db = SessionLocal()
    try:
        fee_ids = request.form.getlist('fee_ids[]', type=int)

        if not fee_ids:
            return jsonify({'success': False, 'error': 'Brak wybranych skladek'}), 400

        updated = 0
        for fee_id in fee_ids:
            fee = db.query(MembershipFee).filter(MembershipFee.id == fee_id).first()
            if fee and fee.status != 'paid':
                fee.status = 'paid'
                fee.amount_paid = fee.amount
                fee.payment_date = datetime.now().date()
                fee.recorded_by = current_user.id
                fee.recorded_at = datetime.now()
                updated += 1

        db.commit()

        return jsonify({
            'success': True,
            'message': f'Zaktualizowano {updated} rekordow'
        })
    except Exception as e:
        db.rollback()
        logger.error(f"Error in bulk action: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500
    finally:
        db.close()


@bp.route('/fees/export')
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_fees_export():
    """Export fees to CSV"""
    db = SessionLocal()
    try:
        year = request.args.get('year', datetime.now().year, type=int)
        month = request.args.get('month', type=int)

        query = db.query(MembershipFee).join(Company).filter(
            MembershipFee.fee_year == year
        )

        if month:
            query = query.filter(MembershipFee.fee_month == month)

        fees = query.order_by(Company.name, MembershipFee.fee_month).all()

        output = StringIO()
        writer = csv.writer(output)
        writer.writerow([
            'Firma', 'NIP', 'Rok', 'Miesiac', 'Kwota', 'Zaplacono',
            'Status', 'Data platnosci', 'Metoda', 'Referencja', 'Notatki'
        ])

        for fee in fees:
            writer.writerow([
                fee.company.name,
                fee.company.nip,
                fee.fee_year,
                fee.fee_month,
                fee.amount,
                fee.amount_paid,
                fee.status,
                fee.payment_date,
                fee.payment_method,
                fee.payment_reference,
                fee.notes
            ])

        output.seek(0)

        return Response(
            output.getvalue(),
            mimetype='text/csv',
            headers={
                'Content-Disposition': f'attachment; filename=skladki_{year}_{month or "all"}.csv'
            }
        )
    finally:
        db.close()


MONTHS_PL_NAMES = {
    1: 'styczeń', 2: 'luty', 3: 'marzec', 4: 'kwiecień',
    5: 'maj', 6: 'czerwiec', 7: 'lipiec', 8: 'sierpień',
    9: 'wrzesień', 10: 'październik', 11: 'listopad', 12: 'grudzień'
}


@bp.route('/fees/reminder-preview', methods=['POST'])
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_fees_reminder_preview():
    """Generate payment reminder preview for a company."""
    db = SessionLocal()
    try:
        company_id = request.form.get('company_id', type=int)
        year = request.form.get('year', type=int)

        company = db.query(Company).filter_by(id=company_id).first()
        if not company:
            return jsonify({'success': False, 'error': 'Firma nie znaleziona'}), 404

        unpaid = db.query(MembershipFee).filter(
            MembershipFee.company_id == company_id,
            MembershipFee.fee_year == year,
            MembershipFee.status.in_(['pending', 'partial', 'overdue']),
        ).order_by(MembershipFee.fee_month).all()

        if not unpaid:
            return jsonify({'success': False, 'error': 'Brak zaległych składek'}), 400

        total_due = sum(float(f.amount) - float(f.amount_paid or 0) for f in unpaid)
        month_range = f"{MONTHS_PL_NAMES[unpaid[0].fee_month]} - {MONTHS_PL_NAMES[unpaid[-1].fee_month]}" if len(unpaid) > 1 else MONTHS_PL_NAMES[unpaid[0].fee_month]
        monthly_rate = int(unpaid[0].amount)

        # Build detailed breakdown
        breakdown_lines = []
        for f in unpaid:
            owed = float(f.amount) - float(f.amount_paid or 0)
            month_name = MONTHS_PL_NAMES[f.fee_month]
            if float(f.amount_paid or 0) > 0:
                breakdown_lines.append(f'{month_name}: {int(owed)} zł (składka {int(f.amount)} zł, wpłacono {int(f.amount_paid)} zł)')
            else:
                breakdown_lines.append(f'{month_name}: {int(owed)} zł')
        breakdown_html = '<br>'.join(breakdown_lines)

        from database import UserCompany, User, CompanyContact
        # All users linked to this company
        ROLE_LABELS = {'OWNER': 'Właściciel', 'MANAGER': 'Zarządzający', 'EMPLOYEE': 'Pracownik', 'NONE': ''}
        company_users = db.query(UserCompany).filter(UserCompany.company_id == company_id).all()
        linked_users = []
        for cu in company_users:
            u = db.query(User).filter_by(id=cu.user_id).first()
            if u:
                role_label = ROLE_LABELS.get(cu.role or '', cu.role or '')
                linked_users.append({'id': u.id, 'name': u.name or u.email, 'email': u.email, 'role': role_label})

        # All available emails: company email + contacts + linked users
        available_emails = []
        if company.email:
            available_emails.append({'email': company.email, 'label': f'Firma: {company.email}'})
        contacts = db.query(CompanyContact).filter(CompanyContact.company_id == company_id).all()
        for c in contacts:
            if c.email and c.email not in [e['email'] for e in available_emails]:
                name = f'{c.first_name} {c.last_name}'.strip() if c.first_name else 'Kontakt'
                available_emails.append({'email': c.email, 'label': f'{name}: {c.email}'})
        for u in linked_users:
            if u['email'] not in [e['email'] for e in available_emails]:
                available_emails.append({'email': u['email'], 'label': f'{u["name"]}: {u["email"]}'})

        manager_user_id = linked_users[0]['id'] if linked_users else None
        manager_name = linked_users[0]['name'] if linked_users else None

        if len(unpaid) == 1:
            period = f"{unpaid[0].fee_month:02d}/{year}"
        else:
            period = f"{unpaid[0].fee_month:02d}-{unpaid[-1].fee_month:02d}/{year}"
        transfer_title = f"Składka członkowska {period} — {company.name}"

        message = (
            f'<p>Szanowni Państwo,</p>'
            f'<p>Uprzejmie przypominamy o zaległej składce członkowskiej w Izbie Gospodarczej Norda Biznes.</p>'
            f'<p><strong>Kwota do zapłaty: {int(total_due)} zł</strong></p>'
            f'<p>Rozpiska:<br>{breakdown_html}</p>'
            f'<p><strong>Dane do przelewu:</strong><br>'
            f'Odbiorca: Norda Biznes Regionalna Izba Przedsiębiorców<br>'
            f'Bank: Kaszubski Bank Spółdzielczy w Wejherowie<br>'
            f'Nr konta: <strong>69 8350 0004 0000 0111 2000 0010</strong><br>'
            f'Tytuł: {transfer_title}</p>'
            f'<p>W razie pytań prosimy o kontakt z biurem Izby.</p>'
            f'<p>Pozdrawiamy,<br>Biuro Izby Norda Biznes<br>'
            f'tel. +48 729 716 400<br>'
            f'biuro@norda-biznes.info</p>'
        )

        return jsonify({
            'success': True,
            'company_name': company.name,
            'company_id': company_id,
            'company_email': company.email,
            'manager_user_id': manager_user_id,
            'manager_name': manager_name,
            'linked_users': linked_users,
            'available_emails': available_emails,
            'total_due': int(total_due),
            'months_count': len(unpaid),
            'period': month_range + ' ' + str(year),
            'transfer_title': transfer_title,
            'subject': f'Przypomnienie o składce — {month_range} {year}',
            'message': message,
        })
    except Exception as e:
        logger.error(f"Error generating reminder: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500
    finally:
        db.close()


@bp.route('/fees/send-reminder', methods=['POST'])
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_fees_send_reminder():
    """Send payment reminder via portal message and email."""
    db = SessionLocal()
    try:
        company_id = request.form.get('company_id', type=int)
        manager_user_id = request.form.get('manager_user_id', type=int)
        subject = request.form.get('subject', '')
        message = request.form.get('message', '')
        send_email_flag = request.form.get('send_email') == 'on'
        company_email = request.form.get('company_email', '')

        if not message:
            return jsonify({'success': False, 'error': 'Treść wiadomości jest wymagana'}), 400

        sent_portal = False
        sent_email = False

        if manager_user_id:
            from database import PrivateMessage
            msg = PrivateMessage(
                sender_id=current_user.id,
                recipient_id=manager_user_id,
                subject=subject,
                content=message,
                created_at=datetime.now(),
            )
            db.add(msg)
            sent_portal = True

        if send_email_flag and company_email:
            try:
                from email_service import send_email
                import re
                plain_text = re.sub(r'<[^>]+>', '', message).replace('&nbsp;', ' ')
                email_list = [e.strip() for e in company_email.split(',') if e.strip()]
                if email_list:
                    send_email(
                        to_emails=email_list,
                        subject=subject,
                        body=plain_text,
                        email_type='fee_reminder',
                    )
                    sent_email = True
            except Exception as e:
                logger.error(f"Error sending reminder email: {e}")

        db.commit()

        result_parts = []
        if sent_portal:
            result_parts.append('wiadomość na portalu')
        if sent_email:
            email_list = [e.strip() for e in company_email.split(',') if e.strip()]
            result_parts.append(f'email na {", ".join(email_list)}')

        return jsonify({
            'success': True,
            'message': f'Przypomnienie wysłane: {", ".join(result_parts)}' if result_parts else 'Brak odbiorcy'
        })
    except Exception as e:
        db.rollback()
        logger.error(f"Error sending reminder: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500
    finally:
        db.close()


@bp.route('/fees/update-debt', methods=['POST'])
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_fees_update_debt():
    """Update previous years debt for a company."""
    db = SessionLocal()
    try:
        company_id = request.form.get('company_id', type=int)
        debt = request.form.get('debt', type=float, default=0)

        company = db.query(Company).filter_by(id=company_id).first()
        if not company:
            return jsonify({'success': False, 'error': 'Firma nie znaleziona'}), 404

        company.previous_years_debt = debt
        db.commit()
        return jsonify({'success': True, 'message': f'Zaległość zapisana: {debt:.0f} zł'})
    except Exception as e:
        db.rollback()
        logger.error(f"Error updating debt: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500
    finally:
        db.close()


# ============================================================
# CALENDAR ADMIN ROUTES
# ============================================================

@bp.route('/kalendarz')
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_calendar():
    """Panel admin - zarządzanie wydarzeniami"""
    db = SessionLocal()
    try:
        events = db.query(NordaEvent).order_by(NordaEvent.event_date.desc()).all()

        return render_template('calendar/admin.html', events=events)
    finally:
        db.close()


@bp.route('/kalendarz/nowy', methods=['GET', 'POST'])
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_calendar_new():
    """Dodaj nowe wydarzenie"""
    if request.method == 'POST':
        db = SessionLocal()
        try:
            # Określ access_level na podstawie formularza lub typu wydarzenia
            access_level = request.form.get('access_level', 'members_only')
            event_type = request.form.get('event_type', 'meeting')

            # Automatycznie ustaw rada_only dla wydarzeń typu "rada"
            if event_type == 'rada' and access_level != 'rada_only':
                access_level = 'rada_only'

            is_external = request.form.get('is_external') == 'on'

            event = NordaEvent(
                title=request.form.get('title', '').strip(),
                description=sanitize_html(request.form.get('description', '').strip()),
                event_date=datetime.strptime(request.form.get('event_date'), '%Y-%m-%d').date(),
                time_start=request.form.get('time_start') or None,
                time_end=request.form.get('time_end') or None,
                location=request.form.get('location', '').strip() or None,
                event_type=event_type,
                max_attendees=None if is_external else (request.form.get('max_attendees', type=int) or None),
                access_level=access_level,
                created_by=current_user.id,
                source='manual',
                is_external=is_external,
                external_url=request.form.get('external_url', '').strip() or None if is_external else None,
                external_source=request.form.get('external_source', '').strip() or None if is_external else None,
                organizer_name=request.form.get('external_source', '').strip() or 'Norda Biznes' if is_external else 'Norda Biznes',
            )

            # Handle file attachment
            attachment = request.files.get('attachment')
            if attachment and attachment.filename:
                from werkzeug.utils import secure_filename
                import uuid
                filename = secure_filename(attachment.filename)
                stored_name = f"{uuid.uuid4().hex}_{filename}"
                upload_dir = os.path.join('static', 'uploads', 'events')
                os.makedirs(upload_dir, exist_ok=True)
                attachment.save(os.path.join(upload_dir, stored_name))
                event.attachment_filename = filename
                event.attachment_path = f"static/uploads/events/{stored_name}"

            db.add(event)
            db.commit()

            flash('Wydarzenie zostało dodane.', 'success')
            return redirect(url_for('.admin_calendar'))
        except Exception as e:
            db.rollback()
            flash(f'Błąd: {str(e)}', 'error')
        finally:
            db.close()

    return render_template('calendar/admin_new.html', event=None)


@bp.route('/kalendarz/<int:event_id>/delete', methods=['POST'])
@login_required
@role_required(SystemRole.OFFICE_MANAGER)
def admin_calendar_delete(event_id):
    """Usuń wydarzenie"""
    db = SessionLocal()
    try:
        event = db.query(NordaEvent).filter(NordaEvent.id == event_id).first()
        if not event:
            return jsonify({'success': False, 'error': 'Wydarzenie nie istnieje'}), 404

        # Delete RSVPs first
        db.query(EventAttendee).filter(EventAttendee.event_id == event_id).delete()
        db.delete(event)
        db.commit()

        return jsonify({'success': True, 'message': 'Wydarzenie usunięte'})
    except Exception as e:
        db.rollback()
        logger.error(f"Error deleting event: {e}")
        return jsonify({'success': False, 'error': str(e)}), 500
    finally:
        db.close()


# ============================================================
# RELEASE NOTIFICATIONS
# ============================================================

@bp.route('/notify-release', methods=['POST'])
@login_required
@role_required(SystemRole.ADMIN)
def admin_notify_release():
    """
    Send notifications to all users about a new release.
    Called manually by admin after deploying a new version.
    """
    data = request.get_json() or {}
    version = data.get('version')
    highlights = data.get('highlights', [])

    if not version:
        return jsonify({'success': False, 'error': 'Brak wersji'}), 400

    from utils.notifications import notify_all_users_release
    count = notify_all_users_release(version=version, highlights=highlights)

    return jsonify({
        'success': True,
        'message': f'Wysłano {count} powiadomień o wersji {version}'
    })