-- Migration: 003_qualifications_fixed.sql
-- Qualifikationen & Zertifikate Modul (korrigiert für INTEGER IDs)

-- Verfügbare Qualifikationstypen (System-weit)
CREATE TABLE IF NOT EXISTS qualification_types (
    id SERIAL PRIMARY KEY,
    key VARCHAR(50) UNIQUE NOT NULL,
    name VARCHAR(100) NOT NULL,
    description TEXT,
    category VARCHAR(50) NOT NULL DEFAULT 'general',
    has_expiry BOOLEAN DEFAULT true,
    validity_months INTEGER,
    is_required BOOLEAN DEFAULT false,
    icon VARCHAR(10) DEFAULT '📜',
    sort_order INTEGER DEFAULT 0,
    is_system BOOLEAN DEFAULT true,
    created_at TIMESTAMP DEFAULT NOW()
);

-- Standard-Qualifikationstypen einfügen (nur wenn Tabelle leer)
INSERT INTO qualification_types (key, name, description, category, has_expiry, validity_months, is_required, icon, sort_order, is_system) 
SELECT * FROM (VALUES
    ('sachkunde_34a', '§34a Sachkundenachweis', 'Sachkundeprüfung nach §34a GewO', 'legal', false, NULL::int, true, '📋', 1, true),
    ('unterrichtung_34a', '§34a Unterrichtungsnachweis', '40-Stunden Unterrichtung nach §34a GewO', 'legal', false, NULL::int, false, '📋', 2, true),
    ('waffensachkunde', 'Waffensachkunde', 'Sachkundenachweis für Waffenbesitz', 'weapons', false, NULL::int, false, '🔫', 10, true),
    ('waffenschein_gruen', 'Waffenschein (grün)', 'Waffenschein für Schusswaffen', 'weapons', true, 36, false, '🟢', 11, true),
    ('waffenschein_gelb', 'Waffenschein (gelb)', 'Kleiner Waffenschein', 'weapons', true, 36, false, '🟡', 12, true),
    ('erste_hilfe', 'Erste-Hilfe-Kurs', 'Erste-Hilfe-Ausbildung (9 UE)', 'safety', true, 24, false, '🏥', 20, true),
    ('brandschutzhelfer', 'Brandschutzhelfer', 'Ausbildung zum Brandschutzhelfer', 'safety', true, 36, false, '🔥', 21, true),
    ('evakuierungshelfer', 'Evakuierungshelfer', 'Ausbildung zum Evakuierungshelfer', 'safety', true, 24, false, '🚪', 22, true),
    ('defibrillator', 'AED/Defibrillator', 'Einweisung Automatisierter Externer Defibrillator', 'safety', true, 24, false, '💓', 23, true),
    ('fuehrerschein_b', 'Führerschein Klasse B', 'PKW Führerschein', 'driving', true, NULL::int, false, '🚗', 30, true),
    ('fuehrerschein_c', 'Führerschein Klasse C', 'LKW Führerschein', 'driving', true, 60, false, '🚛', 31, true),
    ('fuehrerschein_d', 'Führerschein Klasse D', 'Bus Führerschein', 'driving', true, 60, false, '🚌', 32, true),
    ('personenschutz', 'Personenschutz', 'Ausbildung zum Personenschützer', 'special', false, NULL::int, false, '🛡️', 40, true),
    ('hundefuehrer', 'Diensthundeführer', 'Ausbildung zum Diensthundeführer', 'special', true, 12, false, '🐕', 41, true),
    ('intervention', 'Interventionskraft', 'Ausbildung zur Interventionskraft (IK)', 'special', false, NULL::int, false, '⚡', 42, true),
    ('nsk', 'NSK (Notruf-Service-Kraft)', 'Notruf- und Service-Leitstelle', 'special', false, NULL::int, false, '📞', 43, true),
    ('sprache_englisch', 'Englisch', 'Englischkenntnisse', 'language', false, NULL::int, false, '🇬🇧', 50, true),
    ('sprache_franzoesisch', 'Französisch', 'Französischkenntnisse', 'language', false, NULL::int, false, '🇫🇷', 51, true),
    ('sprache_russisch', 'Russisch', 'Russischkenntnisse', 'language', false, NULL::int, false, '🇷🇺', 52, true),
    ('sprache_tuerkisch', 'Türkisch', 'Türkischkenntnisse', 'language', false, NULL::int, false, '🇹🇷', 53, true),
    ('sprache_arabisch', 'Arabisch', 'Arabischkenntnisse', 'language', false, NULL::int, false, '🇸🇦', 54, true)
) AS v(key, name, description, category, has_expiry, validity_months, is_required, icon, sort_order, is_system)
WHERE NOT EXISTS (SELECT 1 FROM qualification_types LIMIT 1);

-- Custom Qualifikationstypen pro Organisation
CREATE TABLE IF NOT EXISTS org_qualification_types (
    id SERIAL PRIMARY KEY,
    org_id INTEGER NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    key VARCHAR(50) NOT NULL,
    name VARCHAR(100) NOT NULL,
    description TEXT,
    category VARCHAR(50) DEFAULT 'custom',
    has_expiry BOOLEAN DEFAULT true,
    validity_months INTEGER,
    icon VARCHAR(10) DEFAULT '📜',
    sort_order INTEGER DEFAULT 100,
    created_at TIMESTAMP DEFAULT NOW(),
    UNIQUE(org_id, key)
);

-- Mitarbeiter-Qualifikationen
CREATE TABLE IF NOT EXISTS employee_qualifications (
    id SERIAL PRIMARY KEY,
    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    org_id INTEGER NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
    
    qualification_type_id INTEGER REFERENCES qualification_types(id),
    org_qualification_type_id INTEGER REFERENCES org_qualification_types(id),
    
    issued_date DATE,
    expiry_date DATE,
    issuer VARCHAR(255),
    certificate_number VARCHAR(100),
    level VARCHAR(50),
    document_url TEXT,
    document_name VARCHAR(255),
    status VARCHAR(20) DEFAULT 'active',
    verified_by INTEGER REFERENCES users(id),
    verified_at TIMESTAMP,
    notes TEXT,
    
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW(),
    
    CONSTRAINT chk_qualification_type CHECK (
        (qualification_type_id IS NOT NULL AND org_qualification_type_id IS NULL) OR
        (qualification_type_id IS NULL AND org_qualification_type_id IS NOT NULL)
    )
);

-- Indices
CREATE INDEX IF NOT EXISTS idx_emp_qual_user ON employee_qualifications(user_id);
CREATE INDEX IF NOT EXISTS idx_emp_qual_org ON employee_qualifications(org_id);
CREATE INDEX IF NOT EXISTS idx_emp_qual_expiry ON employee_qualifications(expiry_date);
CREATE INDEX IF NOT EXISTS idx_emp_qual_status ON employee_qualifications(status);

-- Erinnerungen
CREATE TABLE IF NOT EXISTS qualification_reminders (
    id SERIAL PRIMARY KEY,
    employee_qualification_id INTEGER NOT NULL REFERENCES employee_qualifications(id) ON DELETE CASCADE,
    reminder_date DATE NOT NULL,
    days_before INTEGER NOT NULL,
    sent BOOLEAN DEFAULT false,
    sent_at TIMESTAMP,
    created_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_qual_reminder_date ON qualification_reminders(reminder_date, sent);