-- CreateTable
CREATE TABLE `business_customer_user` (
    `id` BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
    `customer_id` VARCHAR(32) NOT NULL,
    `business_customer_id` VARCHAR(36) NOT NULL,
    `external_user_id` VARCHAR(36) NOT NULL,
    `account` VARCHAR(64) NOT NULL,
    `display_name` VARCHAR(128) NULL,
    `email` VARCHAR(255) NULL,
    `mobile` VARCHAR(32) NULL,
    `main_external_user_id` VARCHAR(36) NULL,
    `status` VARCHAR(16) NOT NULL DEFAULT 'active',
    `is_deleted` BOOLEAN NOT NULL DEFAULT false,
    `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
    `updated_at` DATETIME(3) NOT NULL,

    UNIQUE INDEX `uq_bc_user_external`(`customer_id`, `external_user_id`),
    INDEX `idx_bc_user_tenant_account`(`customer_id`, `account`),
    INDEX `idx_bc_user_tenant_bc`(`customer_id`, `business_customer_id`, `status`),
    PRIMARY KEY (`id`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- AddForeignKey
ALTER TABLE `business_customer_user` ADD CONSTRAINT `business_customer_user_bc_fkey` FOREIGN KEY (`customer_id`, `business_customer_id`) REFERENCES `business_customer`(`customer_id`, `business_customer_id`) ON DELETE RESTRICT ON UPDATE CASCADE;