USE trainer_attendance;

CREATE TABLE IF NOT EXISTS course_whiteboard_snaps (
  id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  course_id INT UNSIGNED NOT NULL,
  title VARCHAR(255) NOT NULL,
  file_path VARCHAR(500) NOT NULL,
  file_name VARCHAR(255) NOT NULL,
  created_by INT UNSIGNED NOT NULL,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  INDEX idx_wb_course (course_id, created_at),
  CONSTRAINT fk_wb_course FOREIGN KEY (course_id) REFERENCES courses(id) ON DELETE CASCADE,
  CONSTRAINT fk_wb_user FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE IF NOT EXISTS course_plans (
  course_id INT UNSIGNED NOT NULL PRIMARY KEY,
  content TEXT NULL,
  updated_by INT UNSIGNED NULL,
  updated_at TIMESTAMP NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
  CONSTRAINT fk_plan_course FOREIGN KEY (course_id) REFERENCES courses(id) ON DELETE CASCADE,
  CONSTRAINT fk_plan_user FOREIGN KEY (updated_by) REFERENCES users(id) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;