-- 注意：Prisma 生成的 MySQL DDL 固定写 utf8mb4_unicode_ci，会覆盖库级
-- utf8mb4_0900_bin；账号/token 的大小写敏感语义依赖 bin collation，故手工
-- 改写为 utf8mb4_0900_bin（后续迁移同样需要复核 CREATE TABLE 的 collation）。

-- CreateTable
CREATE TABLE `users` (
    `id` VARCHAR(191) NOT NULL,
    `account` VARCHAR(64) NOT NULL,
    `passwordHash` VARCHAR(255) NOT NULL,
    `displayName` VARCHAR(128) NOT NULL,
    `role` VARCHAR(191) NOT NULL DEFAULT 'staff',
    `sourceStatus` VARCHAR(191) NOT NULL DEFAULT 'local',
    `localLocked` BOOLEAN NOT NULL DEFAULT false,
    `credentialStatus` VARCHAR(191) NOT NULL DEFAULT 'active',
    `locale` VARCHAR(16) NULL,
    `createdAt` DATETIME(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6),

    UNIQUE INDEX `users_account_key`(`account`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_bin;

-- CreateTable
CREATE TABLE `sessions` (
    `id` VARCHAR(191) NOT NULL,
    `userId` VARCHAR(191) NOT NULL,
    `tokenHash` VARCHAR(64) NOT NULL,
    `expiresAt` DATETIME(6) NOT NULL,
    `revokedAt` DATETIME(6) NULL,

    UNIQUE INDEX `sessions_tokenHash_key`(`tokenHash`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_bin;

-- CreateTable
CREATE TABLE `audit_logs` (
    `id` VARCHAR(191) NOT NULL,
    `actorId` VARCHAR(191) NULL,
    `action` VARCHAR(64) NOT NULL,
    `resourceId` VARCHAR(64) NULL,
    `metadata` JSON NULL,
    `createdAt` DATETIME(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6),

    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_bin;

-- AddForeignKey
ALTER TABLE `sessions` ADD CONSTRAINT `sessions_userId_fkey` FOREIGN KEY (`userId`) REFERENCES `users`(`id`) ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `audit_logs` ADD CONSTRAINT `audit_logs_actorId_fkey` FOREIGN KEY (`actorId`) REFERENCES `users`(`id`) ON DELETE SET NULL ON UPDATE CASCADE;