-- Migration für Meta-Entries Tabelle
-- Führe diese SQL-Datei aus um die Tabelle zu erstellen

CREATE TABLE IF NOT EXISTS meta_entries (
    id INT PRIMARY KEY AUTO_INCREMENT,

    -- Route-basierte Meta-Daten
    route_pattern VARCHAR(255) NULL,

    -- Entity-basierte Meta-Daten
    entity_type VARCHAR(100) NULL,
    entity_id INT NULL,

    -- Meta-Daten Felder
    title VARCHAR(255) NULL,
    description TEXT NULL,
    keywords TEXT NULL,

    -- Open Graph
    og_title VARCHAR(255) NULL,
    og_description TEXT NULL,
    og_image VARCHAR(500) NULL,
    og_type VARCHAR(50) NULL,

    -- Twitter
    twitter_card VARCHAR(50) NULL,
    twitter_site VARCHAR(100) NULL,

    -- Andere
    canonical VARCHAR(500) NULL,
    custom_meta JSON NULL,

    -- System-Felder
    priority INT DEFAULT 0,
    active BOOLEAN DEFAULT TRUE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,

    -- Indizes
    INDEX idx_route_pattern (route_pattern),
    INDEX idx_entity (entity_type, entity_id),
    INDEX idx_active_priority (active, priority),

    -- Unique Constraints
    UNIQUE KEY unique_route_pattern (route_pattern),
    UNIQUE KEY unique_entity (entity_type, entity_id),

    -- Constraints
    CONSTRAINT check_route_or_entity CHECK (
        (route_pattern IS NOT NULL AND entity_type IS NULL AND entity_id IS NULL) OR
        (route_pattern IS NULL AND entity_type IS NOT NULL AND entity_id IS NOT NULL)
    )
);

-- Beispiel-Daten einfügen
INSERT INTO meta_entries (route_pattern, title, description, og_title, og_type, priority, active) VALUES
('/', 'Startseite - Meine Website', 'Willkommen auf meiner Website. Hier finden Sie alles über...', 'Startseite', 'website', 100, TRUE),
('/blog', 'Blog - Meine Website', 'Alle Artikel und Neuigkeiten aus unserem Blog', 'Blog', 'website', 90, TRUE),
('/blog/*', 'Blog: {title} - Meine Website', '{description}', '{title}', 'article', 80, TRUE),
('/contact', 'Kontakt - Meine Website', 'Nehmen Sie Kontakt mit uns auf. Wir freuen uns auf Ihre Nachricht.', 'Kontakt', 'website', 70, TRUE);

-- Template-Beispiele mit Platzhaltern
INSERT INTO meta_entries (entity_type, entity_id, title, description, og_title, og_description, priority, active) VALUES
('product', 1, '{product.name} - Jetzt kaufen | Mein Shop', '{product.name} für nur {product.price}€. {truncate:product.description}', '{product.name}', '{truncate:product.description}', 100, TRUE),
('article', 1, '{article.title} | Mein Blog', '{truncate:article.content}', '{article.title}', '{truncate:article.content}', 100, TRUE);