-- CreateTable
CREATE TABLE `customers` (
    `id` BIGINT NOT NULL AUTO_INCREMENT,
    `customer_id` VARCHAR(64) NOT NULL,
    `name` VARCHAR(128) NULL,
    `country` VARCHAR(64) NULL,
    `email` VARCHAR(128) NULL,
    `company` VARCHAR(255) NULL,
    `register_time` DATETIME(3) NULL,
    `avatar_url` VARCHAR(512) NULL,
    `buyer_tags` VARCHAR(255) NULL,
    `buyer_features` VARCHAR(255) NULL,
    `behavior_product_views` INTEGER NULL,
    `behavior_valid_inquiries` INTEGER NULL,
    `behavior_valid_rfq` INTEGER NULL,
    `behavior_login_days` INTEGER NULL,
    `behavior_spam_inquiries` INTEGER NULL,
    `behavior_top_industry` VARCHAR(255) NULL,
    `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updated_at` DATETIME(3) NOT NULL,

    UNIQUE INDEX `customers_customer_id_key`(`customer_id`),
    INDEX `customers_country_idx`(`country`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- CreateTable
CREATE TABLE `inquiries` (
    `id` BIGINT NOT NULL AUTO_INCREMENT,
    `inquiry_id` VARCHAR(32) NOT NULL,
    `customer_id` VARCHAR(64) NULL,
    `manager` VARCHAR(128) NULL,
    `create_time` DATETIME(3) NOT NULL,
    `update_time` DATETIME(3) NOT NULL,
    `status` VARCHAR(64) NULL,
    `msg_preview` VARCHAR(512) NULL,
    `is_flagged` BOOLEAN NOT NULL DEFAULT false,
    `messages_count` INTEGER NOT NULL DEFAULT 0,
    `last_send_time` DATETIME(3) NULL,
    `has_failed_batches` BOOLEAN NOT NULL DEFAULT false,
    `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updated_at` DATETIME(3) NOT NULL,

    UNIQUE INDEX `inquiries_inquiry_id_key`(`inquiry_id`),
    INDEX `inquiries_customer_id_idx`(`customer_id`),
    INDEX `inquiries_manager_idx`(`manager`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- CreateTable
CREATE TABLE `chat_messages` (
    `id` BIGINT NOT NULL AUTO_INCREMENT,
    `message_id` VARCHAR(64) NOT NULL,
    `inquiry_id` VARCHAR(32) NOT NULL,
    `sender` VARCHAR(128) NULL,
    `direction` ENUM('incoming', 'outgoing', 'system') NOT NULL,
    `send_time` DATETIME(3) NOT NULL,
    `content` MEDIUMTEXT NOT NULL,
    `translation` TEXT NULL,
    `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),

    UNIQUE INDEX `chat_messages_message_id_key`(`message_id`),
    INDEX `chat_messages_inquiry_id_send_time_message_id_idx`(`inquiry_id`, `send_time`, `message_id`),
    INDEX `chat_messages_inquiry_id_idx`(`inquiry_id`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- CreateTable
CREATE TABLE `users` (
    `id` BIGINT NOT NULL AUTO_INCREMENT,
    `username` VARCHAR(191) NOT NULL,
    `password_hash` VARCHAR(191) NOT NULL,
    `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),

    UNIQUE INDEX `users_username_key`(`username`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- AddForeignKey
ALTER TABLE `inquiries` ADD CONSTRAINT `inquiries_customer_id_fkey` FOREIGN KEY (`customer_id`) REFERENCES `customers`(`customer_id`) ON DELETE SET NULL ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE `chat_messages` ADD CONSTRAINT `chat_messages_inquiry_id_fkey` FOREIGN KEY (`inquiry_id`) REFERENCES `inquiries`(`inquiry_id`) ON DELETE RESTRICT ON UPDATE CASCADE;