-- CreateTable
CREATE TABLE `conversations` (
    `id` VARCHAR(191) NOT NULL,
    `userAId` VARCHAR(191) NOT NULL,
    `userBId` VARCHAR(191) NOT NULL,
    `lastMessageAt` DATETIME(3) NULL,
    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),

    UNIQUE INDEX `conversations_userAId_userBId_key`(`userAId`, `userBId`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- CreateTable
CREATE TABLE `messages` (
    `id` VARCHAR(191) NOT NULL,
    `conversationId` VARCHAR(191) NOT NULL,
    `senderId` VARCHAR(191) NOT NULL,
    `body` TEXT NOT NULL,
    `isRead` BOOLEAN NOT NULL DEFAULT false,
    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),

    INDEX `messages_conversationId_createdAt_idx`(`conversationId`, `createdAt`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- AddForeignKey
ALTER TABLE `conversations` ADD CONSTRAINT `conversations_userAId_fkey` FOREIGN KEY (`userAId`) REFERENCES `users`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `conversations` ADD CONSTRAINT `conversations_userBId_fkey` FOREIGN KEY (`userBId`) REFERENCES `users`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `messages` ADD CONSTRAINT `messages_conversationId_fkey` FOREIGN KEY (`conversationId`) REFERENCES `conversations`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `messages` ADD CONSTRAINT `messages_senderId_fkey` FOREIGN KEY (`senderId`) REFERENCES `users`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;