-- AlterTable
ALTER TABLE "Course" DROP COLUMN "progress",
ADD COLUMN     "academicYear" TEXT,
ADD COLUMN     "code" TEXT NOT NULL,
ADD COLUMN     "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
ADD COLUMN     "isPublished" BOOLEAN NOT NULL DEFAULT false,
ADD COLUMN     "language" TEXT DEFAULT 'English',
ADD COLUMN     "learningOutcomes" TEXT[],
ADD COLUMN     "level" TEXT DEFAULT 'Undergraduate',
ADD COLUMN     "semester" INTEGER,
ADD COLUMN     "updatedAt" TIMESTAMP(3) NOT NULL;

-- AlterTable
ALTER TABLE "Enrollment" ADD COLUMN     "completionDate" TIMESTAMP(3),
ADD COLUMN     "grade" DOUBLE PRECISION,
ADD COLUMN     "progress" DOUBLE PRECISION NOT NULL DEFAULT 0,
ADD COLUMN     "status" TEXT NOT NULL DEFAULT 'ENROLLED',
ADD COLUMN     "updatedAt" TIMESTAMP(3) NOT NULL;

-- CreateTable
CREATE TABLE "Module" (
    "id" SERIAL NOT NULL,
    "title" TEXT NOT NULL,
    "description" TEXT,
    "order" INTEGER NOT NULL,
    "courseId" INTEGER NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

    CONSTRAINT "Module_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "Lesson" (
    "id" SERIAL NOT NULL,
    "title" TEXT NOT NULL,
    "content" TEXT,
    "type" TEXT NOT NULL DEFAULT 'TEXT',
    "videoUrl" TEXT,
    "order" INTEGER NOT NULL,
    "moduleId" INTEGER NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

    CONSTRAINT "Lesson_pkey" PRIMARY KEY ("id")
);

-- CreateTable
CREATE TABLE "LessonCompletion" (
    "id" SERIAL NOT NULL,
    "userId" INTEGER NOT NULL,
    "lessonId" INTEGER NOT NULL,
    "completedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

    CONSTRAINT "LessonCompletion_pkey" PRIMARY KEY ("id")
);

-- CreateIndex
CREATE UNIQUE INDEX "LessonCompletion_userId_lessonId_key" ON "LessonCompletion"("userId", "lessonId");

-- CreateIndex
CREATE UNIQUE INDEX "Course_code_key" ON "Course"("code");

-- AddForeignKey
ALTER TABLE "Module" ADD CONSTRAINT "Module_courseId_fkey" FOREIGN KEY ("courseId") REFERENCES "Course"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Lesson" ADD CONSTRAINT "Lesson_moduleId_fkey" FOREIGN KEY ("moduleId") REFERENCES "Module"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "LessonCompletion" ADD CONSTRAINT "LessonCompletion_lessonId_fkey" FOREIGN KEY ("lessonId") REFERENCES "Lesson"("id") ON DELETE RESTRICT ON UPDATE CASCADE;