-- Consolidates additive schema previously created lazily by request handlers.
-- Run once on staging/production before disabling runtime DDL.

CREATE TABLE IF NOT EXISTS `teacher_reviews` (
  `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  `teacher_id` BIGINT UNSIGNED NOT NULL,
  `student_id` BIGINT UNSIGNED NOT NULL,
  `course_id` BIGINT UNSIGNED NULL,
  `lesson_id` BIGINT UNSIGNED NULL,
  `rating_overall` DECIMAL(3,2) NOT NULL DEFAULT 5.00,
  `rating_clarity` INT NOT NULL DEFAULT 5,
  `rating_response_speed` INT NOT NULL DEFAULT 5,
  `rating_socratic_interaction` INT NOT NULL DEFAULT 5,
  `review_text` TEXT NULL,
  `review_weight` DECIMAL(4,3) NOT NULL DEFAULT 1.000,
  `student_watch_percentage` DECIMAL(5,2) NOT NULL DEFAULT 100.00,
  `socratic_accuracy_rate` DECIMAL(5,2) NOT NULL DEFAULT 100.00,
  `is_flagged_anomaly` TINYINT(1) NOT NULL DEFAULT 0,
  `is_verified` TINYINT(1) NOT NULL DEFAULT 1,
  `created_at` TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `idx_teacher_reviews_teacher` (`teacher_id`),
  KEY `idx_teacher_reviews_student` (`student_id`),
  CONSTRAINT `fk_tr_teacher` FOREIGN KEY (`teacher_id`) REFERENCES `teachers` (`id`) ON DELETE CASCADE,
  CONSTRAINT `fk_tr_student` FOREIGN KEY (`student_id`) REFERENCES `students` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;