-- AlterTable
ALTER TABLE `Lesson` ADD COLUMN `duration` INTEGER NOT NULL DEFAULT 0;

-- CreateTable
CREATE TABLE `Certificate` (
    `id` INTEGER NOT NULL AUTO_INCREMENT,
    `user_id` INTEGER NOT NULL,
    `course_id` INTEGER NOT NULL,
    `file_path` VARCHAR(191) NOT NULL,
    `html_content` TEXT NOT NULL,
    `certificate_number` VARCHAR(191) NOT NULL,
    `status` VARCHAR(191) NOT NULL DEFAULT 'unclaimed',
    `issued_date` DATETIME(3) NULL,
    `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updated_at` DATETIME(3) NOT NULL,

    UNIQUE INDEX `Certificate_certificate_number_key`(`certificate_number`),
    UNIQUE INDEX `Certificate_user_id_course_id_key`(`user_id`, `course_id`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- AddForeignKey
ALTER TABLE `Certificate` ADD CONSTRAINT `Certificate_user_id_fkey` FOREIGN KEY (`user_id`) REFERENCES `User`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `Certificate` ADD CONSTRAINT `Certificate_course_id_fkey` FOREIGN KEY (`course_id`) REFERENCES `Course`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;