-- CreateEnum
CREATE TYPE "Role" AS ENUM ('TUTOR', 'STUDENT');

-- CreateTable
CREATE TABLE "User" (
    "id" SERIAL NOT NULL,
    "username" TEXT NOT NULL,
    "passwordHash" TEXT NOT NULL,
    "role" "Role" NOT NULL,
    "displayName" TEXT,

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

-- CreateTable
CREATE TABLE "TutorAssignment" (
    "tutorId" INTEGER NOT NULL,
    "studentId" INTEGER NOT NULL,

    CONSTRAINT "TutorAssignment_pkey" PRIMARY KEY ("tutorId","studentId")
);

-- CreateTable
CREATE TABLE "Setting" (
    "key" TEXT NOT NULL,
    "value" TEXT NOT NULL,

    CONSTRAINT "Setting_pkey" PRIMARY KEY ("key")
);

-- CreateTable
CREATE TABLE "ChatMessage" (
    "id" SERIAL NOT NULL,
    "studentId" INTEGER NOT NULL,
    "role" TEXT NOT NULL,
    "content" TEXT NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "Question" (
    "id" SERIAL NOT NULL,
    "studentId" INTEGER NOT NULL,
    "text" TEXT NOT NULL,
    "answer" TEXT,
    "date" TEXT NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "Textbook" (
    "id" SERIAL NOT NULL,
    "studentId" INTEGER NOT NULL,
    "topic" TEXT NOT NULL,
    "content" TEXT NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "Test" (
    "id" SERIAL NOT NULL,
    "studentId" INTEGER NOT NULL,
    "topic" TEXT NOT NULL,
    "questions" TEXT NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "TestResult" (
    "id" SERIAL NOT NULL,
    "testId" INTEGER NOT NULL,
    "answers" TEXT NOT NULL,
    "score" INTEGER NOT NULL,
    "total" INTEGER NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateTable
CREATE TABLE "Report" (
    "id" SERIAL NOT NULL,
    "studentId" INTEGER NOT NULL,
    "date" TEXT NOT NULL,
    "content" TEXT NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateIndex
CREATE UNIQUE INDEX "User_username_key" ON "User"("username");

-- CreateIndex
CREATE UNIQUE INDEX "TutorAssignment_studentId_key" ON "TutorAssignment"("studentId");

-- AddForeignKey
ALTER TABLE "TutorAssignment" ADD CONSTRAINT "TutorAssignment_tutorId_fkey" FOREIGN KEY ("tutorId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "TutorAssignment" ADD CONSTRAINT "TutorAssignment_studentId_fkey" FOREIGN KEY ("studentId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "ChatMessage" ADD CONSTRAINT "ChatMessage_studentId_fkey" FOREIGN KEY ("studentId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Question" ADD CONSTRAINT "Question_studentId_fkey" FOREIGN KEY ("studentId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Textbook" ADD CONSTRAINT "Textbook_studentId_fkey" FOREIGN KEY ("studentId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Test" ADD CONSTRAINT "Test_studentId_fkey" FOREIGN KEY ("studentId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "TestResult" ADD CONSTRAINT "TestResult_testId_fkey" FOREIGN KEY ("testId") REFERENCES "Test"("id") ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "Report" ADD CONSTRAINT "Report_studentId_fkey" FOREIGN KEY ("studentId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;