CREATE TABLE IF NOT EXISTS chat_messages (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    user_id INT UNSIGNED NOT NULL,
    message TEXT NOT NULL,
    response TEXT NOT NULL,
    context_data JSON DEFAULT NULL COMMENT 'Data konteks (items, lost_items, dll)',
    intent VARCHAR(50) DEFAULT NULL COMMENT 'search_item, report_lost, claim_help, general',
    confidence_score DECIMAL(5,2) DEFAULT 0.00,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    INDEX idx_chat_user_id (user_id),
    INDEX idx_chat_intent (intent),
    INDEX idx_chat_created_at (created_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

SELECT '✅ AI Chat table created successfully!' AS Status;