-- ============================================================
-- NordaBiz - Migration 003: Membership Fees Management
-- ============================================================
-- Created: 2026-01-04
-- Description:
--   - Creates membership_fees table for tracking monthly payments
--   - Creates membership_fee_config for fee amount configuration
--   - Creates announcements table for board communications
-- ============================================================

-- ============================================================
-- 1. MEMBERSHIP FEES TABLE
-- ============================================================

CREATE TABLE IF NOT EXISTS membership_fees (
    id SERIAL PRIMARY KEY,
    company_id INTEGER NOT NULL REFERENCES companies(id) ON DELETE CASCADE,

    -- Period
    fee_year INTEGER NOT NULL,
    fee_month INTEGER NOT NULL CHECK (fee_month >= 1 AND fee_month <= 12),

    -- Amounts
    amount NUMERIC(10, 2) NOT NULL,
    amount_paid NUMERIC(10, 2) DEFAULT 0,

    -- Status: pending, paid, partial, overdue, waived
    status VARCHAR(20) DEFAULT 'pending',

    -- Payment details
    payment_date DATE,
    payment_method VARCHAR(50),
    payment_reference VARCHAR(100),

    -- Admin tracking
    recorded_by INTEGER REFERENCES users(id),
    recorded_at TIMESTAMP,

    notes TEXT,

    -- Timestamps
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW(),

    -- Unique constraint: one fee record per company per month
    CONSTRAINT uq_company_fee_period UNIQUE (company_id, fee_year, fee_month)
);

CREATE INDEX IF NOT EXISTS idx_membership_fees_company ON membership_fees(company_id);
CREATE INDEX IF NOT EXISTS idx_membership_fees_period ON membership_fees(fee_year, fee_month);
CREATE INDEX IF NOT EXISTS idx_membership_fees_status ON membership_fees(status);

COMMENT ON TABLE membership_fees IS 'Monthly membership fee tracking for Norda Biznes companies';

-- ============================================================
-- 2. FEE CONFIGURATION TABLE
-- ============================================================

CREATE TABLE IF NOT EXISTS membership_fee_config (
    id SERIAL PRIMARY KEY,
    scope VARCHAR(20) NOT NULL,  -- 'global', 'category', 'company'
    category_id INTEGER REFERENCES categories(id),
    company_id INTEGER REFERENCES companies(id),

    monthly_amount NUMERIC(10, 2) NOT NULL,

    valid_from DATE NOT NULL,
    valid_until DATE,

    created_by INTEGER REFERENCES users(id),
    created_at TIMESTAMP DEFAULT NOW(),
    notes TEXT
);

CREATE INDEX IF NOT EXISTS idx_fee_config_scope ON membership_fee_config(scope);
CREATE INDEX IF NOT EXISTS idx_fee_config_validity ON membership_fee_config(valid_from, valid_until);

-- Insert default global fee (100 PLN)
INSERT INTO membership_fee_config (scope, monthly_amount, valid_from, notes)
VALUES ('global', 100.00, '2026-01-01', 'Domyslna skladka miesieczna')
ON CONFLICT DO NOTHING;

COMMENT ON TABLE membership_fee_config IS 'Configuration for membership fee amounts';

-- ============================================================
-- 3. ANNOUNCEMENTS TABLE
-- ============================================================

CREATE TABLE IF NOT EXISTS announcements (
    id SERIAL PRIMARY KEY,

    title VARCHAR(255) NOT NULL,
    content TEXT NOT NULL,

    -- Types: general, fees, event, important, urgent
    announcement_type VARCHAR(50) DEFAULT 'general',

    is_published BOOLEAN DEFAULT FALSE,
    is_pinned BOOLEAN DEFAULT FALSE,
    publish_date TIMESTAMP,
    expire_date TIMESTAMP,

    -- Target: all, fee_pending, fee_overdue
    target_audience VARCHAR(50) DEFAULT 'all',

    author_id INTEGER NOT NULL REFERENCES users(id),

    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_announcements_published ON announcements(is_published);
CREATE INDEX IF NOT EXISTS idx_announcements_type ON announcements(announcement_type);
CREATE INDEX IF NOT EXISTS idx_announcements_dates ON announcements(publish_date, expire_date);

COMMENT ON TABLE announcements IS 'Board announcements visible to logged-in members';

-- ============================================================
-- MIGRATION COMPLETE
-- ============================================================