-- Migration: create course_reviews table
CREATE TABLE IF NOT EXISTS `course_reviews` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `course_id` int(11) NOT NULL,
  `student_id` int(11) NOT NULL,
  `rating` tinyint(1) NOT NULL DEFAULT 0,
  `review` text DEFAULT NULL,
  `status` enum('published','pending','removed') NOT NULL DEFAULT 'published',
  `created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `idx_course_id` (`course_id`),
  KEY `idx_student_id` (`student_id`),
  CONSTRAINT `fk_course_reviews_course_id` FOREIGN KEY (`course_id`) REFERENCES `courses` (`id`) ON DELETE CASCADE,
  CONSTRAINT `fk_course_reviews_student_id` FOREIGN KEY (`student_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;