#!/usr/bin/env python3
"""
KRS PDF Downloader - pobiera odpisy pełne z portalu PRS

Używa Playwright do automatycznego pobierania PDF z oficjalnego
portalu Ministerstwa Sprawiedliwości (prs.ms.gov.pl).

Pliki PDF zawierają PEŁNE dane (niezanonimizowane), w przeciwieństwie
do API które zwraca dane zanonimizowane.

Usage:
    python scripts/download_krs_pdf.py --krs 0000725183
    python scripts/download_krs_pdf.py --all  # wszystkie firmy z bazy
"""

import os
import sys
import argparse
import time
from pathlib import Path

# Add parent directory to path for imports
sys.path.insert(0, str(Path(__file__).parent.parent))

try:
    from playwright.sync_api import sync_playwright, TimeoutError as PlaywrightTimeout
except ImportError:
    print("Playwright nie jest zainstalowany. Uruchom: pip install playwright && playwright install chromium")
    sys.exit(1)


# Output directory for PDFs
PDF_OUTPUT_DIR = Path(__file__).parent.parent / "data" / "krs_pdfs"


def download_krs_pdf(krs_number: str, output_dir: Path = PDF_OUTPUT_DIR) -> str:
    """
    Download full KRS extract PDF from wyszukiwarka-krs.ms.gov.pl

    Args:
        krs_number: KRS number (with or without leading zeros)
        output_dir: Directory to save PDF

    Returns:
        Path to downloaded PDF file
    """
    # Normalize KRS number
    krs = krs_number.zfill(10)

    # Create output directory
    output_dir.mkdir(parents=True, exist_ok=True)
    output_file = output_dir / f"odpis_pelny_{krs}.pdf"

    # Skip if already downloaded
    if output_file.exists():
        print(f"  [SKIP] PDF już istnieje: {output_file}")
        return str(output_file)

    print(f"  [INFO] Pobieranie odpisu pełnego dla KRS {krs}...")

    with sync_playwright() as p:
        browser = p.chromium.launch(headless=True)
        context = browser.new_context(
            accept_downloads=True,
            user_agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36"
        )
        page = context.new_page()

        try:
            # Go to KRS search page - wyszukiwarka-krs.ms.gov.pl
            page.goto("https://wyszukiwarka-krs.ms.gov.pl/", timeout=30000)
            time.sleep(3)

            # Wait for page to load
            page.wait_for_load_state("networkidle", timeout=15000)

            # Find visible text input (skip hidden checkbox inputs)
            # The KRS input is typically the first visible text input
            search_inputs = page.locator("input[type='text']:visible")
            search_input = search_inputs.first

            # Fill KRS number
            search_input.fill(krs)
            time.sleep(1)

            # Click search button
            search_btn = page.locator("button:has-text('Szukaj')").first
            search_btn.click()

            # Wait for results
            time.sleep(5)
            page.wait_for_load_state("networkidle", timeout=20000)

            # Click on "Wyświetl szczegóły" to see details
            details_btn = page.locator("button:has-text('Wyświetl szczegóły'), a:has-text('Wyświetl szczegóły')").first
            if details_btn.is_visible(timeout=5000):
                details_btn.click()
                time.sleep(3)
                page.wait_for_load_state("networkidle", timeout=15000)

            # Find PDF download buttons - look for "Pobierz PDF"
            # There are usually 2: "Informacja skrócona" and "Informacja pełna"
            # We want "Informacja pełna" (the second one)
            pdf_buttons = page.locator("button:has-text('Pobierz PDF')")

            if pdf_buttons.count() >= 2:
                # Click the second PDF button (Informacja pełna)
                with page.expect_download(timeout=30000) as download_info:
                    pdf_buttons.nth(1).click()
                download = download_info.value
                download.save_as(str(output_file))
                print(f"  [OK] Zapisano: {output_file}")
                return str(output_file)
            elif pdf_buttons.count() == 1:
                # Only one button, use it
                with page.expect_download(timeout=30000) as download_info:
                    pdf_buttons.first.click()
                download = download_info.value
                download.save_as(str(output_file))
                print(f"  [OK] Zapisano: {output_file}")
                return str(output_file)
            else:
                print(f"  [ERROR] Nie znaleziono przycisku PDF dla KRS {krs}")
                page.screenshot(path=str(output_dir / f"debug_{krs}.png"))
                return None

        except PlaywrightTimeout as e:
            print(f"  [ERROR] Timeout dla KRS {krs}: {e}")
            page.screenshot(path=str(output_dir / f"timeout_{krs}.png"))
            return None
        except Exception as e:
            print(f"  [ERROR] Błąd dla KRS {krs}: {e}")
            page.screenshot(path=str(output_dir / f"error_{krs}.png"))
            return None
        finally:
            browser.close()


def get_all_krs_numbers():
    """Get all KRS numbers from database"""
    from database import SessionLocal, Company

    db = SessionLocal()
    try:
        companies = db.query(Company).filter(
            Company.status == 'active',
            Company.krs.isnot(None),
            Company.krs != ''
        ).all()
        return [(c.krs, c.name) for c in companies]
    finally:
        db.close()


def main():
    parser = argparse.ArgumentParser(description="Download KRS PDF extracts")
    parser.add_argument("--krs", type=str, help="Single KRS number to download")
    parser.add_argument("--all", action="store_true", help="Download all KRS from database")
    parser.add_argument("--output", type=str, default=str(PDF_OUTPUT_DIR), help="Output directory")
    args = parser.parse_args()

    output_dir = Path(args.output)

    if args.krs:
        # Download single KRS
        result = download_krs_pdf(args.krs, output_dir)
        if result:
            print(f"\nPobrano: {result}")
        else:
            print("\nBłąd pobierania")
            sys.exit(1)

    elif args.all:
        # Download all from database
        print("Pobieranie wszystkich firm z KRS z bazy danych...")
        companies = get_all_krs_numbers()
        print(f"Znaleziono {len(companies)} firm z numerem KRS\n")

        success = 0
        failed = 0

        for krs, name in companies:
            print(f"[{success + failed + 1}/{len(companies)}] {name}")
            result = download_krs_pdf(krs, output_dir)
            if result:
                success += 1
            else:
                failed += 1
            # Rate limiting - be nice to the server
            time.sleep(2)

        print(f"\n=== PODSUMOWANIE ===")
        print(f"Pobrano: {success}")
        print(f"Błędy: {failed}")
        print(f"Pliki zapisane w: {output_dir}")
    else:
        parser.print_help()


if __name__ == "__main__":
    main()