-- CreateTable
CREATE TABLE "User" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "email" TEXT NOT NULL,
    "username" TEXT NOT NULL,
    "password" TEXT NOT NULL,
    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
);

-- CreateTable
CREATE TABLE "Conversation" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
);

-- CreateTable
CREATE TABLE "ConversationParticipant" (
    "conversationId" TEXT NOT NULL,
    "userId" TEXT NOT NULL,
    "lastReadAt" DATETIME,

    PRIMARY KEY ("conversationId", "userId"),
    CONSTRAINT "ConversationParticipant_conversationId_fkey" FOREIGN KEY ("conversationId") REFERENCES "Conversation" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
    CONSTRAINT "ConversationParticipant_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User" ("id") ON DELETE CASCADE ON UPDATE CASCADE
);

-- CreateTable
CREATE TABLE "Message" (
    "id" TEXT NOT NULL PRIMARY KEY,
    "conversationId" TEXT NOT NULL,
    "senderId" TEXT NOT NULL,
    "content" TEXT NOT NULL,
    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT "Message_conversationId_fkey" FOREIGN KEY ("conversationId") REFERENCES "Conversation" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
    CONSTRAINT "Message_senderId_fkey" FOREIGN KEY ("senderId") REFERENCES "User" ("id") ON DELETE CASCADE ON UPDATE CASCADE
);

-- CreateIndex
CREATE UNIQUE INDEX "User_email_key" ON "User"("email");

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

-- CreateIndex
CREATE INDEX "ConversationParticipant_userId_idx" ON "ConversationParticipant"("userId");

-- CreateIndex
CREATE INDEX "Message_conversationId_createdAt_idx" ON "Message"("conversationId", "createdAt");