-- CreateTable
CREATE TABLE "User" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "username" TEXT NOT NULL,
    "password" TEXT NOT NULL
);

-- CreateTable
CREATE TABLE "Chat" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" DATETIME NOT NULL,
    "title" TEXT NOT NULL,
    "userId" TEXT NOT NULL,
    CONSTRAINT "Chat_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User" ("id") ON DELETE RESTRICT ON UPDATE CASCADE
);

-- CreateTable
CREATE TABLE "Message" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "role" TEXT NOT NULL,
    "content" TEXT NOT NULL,
    "chatId" TEXT NOT NULL,
    CONSTRAINT "Message_chatId_fkey" FOREIGN KEY ("chatId") REFERENCES "Chat" ("id") ON DELETE CASCADE ON UPDATE CASCADE
);

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