-- Update Users table: add status and possibly other fields if needed
-- Users already has 'role' ENUM('admin', 'user')

-- Update Cars table
ALTER TABLE cars ADD COLUMN owner_id INT NULL AFTER id;
ALTER TABLE cars ADD COLUMN approval_status ENUM('pending', 'approved', 'rejected') DEFAULT 'approved' AFTER status;
ALTER TABLE cars ADD COLUMN view_count INT DEFAULT 0 AFTER approval_status;
ALTER TABLE cars ADD COLUMN badge VARCHAR(50) NULL AFTER view_count;
ALTER TABLE cars ADD CONSTRAINT fk_cars_owner FOREIGN KEY (owner_id) REFERENCES users(id) ON DELETE SET NULL;

-- Reviews Table
CREATE TABLE IF NOT EXISTS reviews (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    car_id INT NOT NULL,
    rating INT NOT NULL CHECK (rating >= 1 AND rating <= 5),
    comment TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (car_id) REFERENCES cars(id) ON DELETE CASCADE
) ENGINE=InnoDB;

-- Notifications Table
CREATE TABLE IF NOT EXISTS notifications (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NULL, -- NULL means it might be for all admins or system-wide
    message TEXT NOT NULL,
    type VARCHAR(50) DEFAULT 'info', -- 'new_car', 'new_booking', 'new_purchase'
    is_read TINYINT(1) DEFAULT 0,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB;

-- Purchases Table (Simulation)
CREATE TABLE IF NOT EXISTS purchases (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    car_id INT NOT NULL,
    amount DECIMAL(12, 2) NOT NULL,
    bank_name VARCHAR(100) NOT NULL,
    transaction_id VARCHAR(100) NOT NULL,
    status ENUM('pending', 'completed', 'failed') DEFAULT 'completed',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (car_id) REFERENCES cars(id) ON DELETE CASCADE
) ENGINE=InnoDB;