-- 文件中心独占数据库，其他服务只保存文件逻辑ID。
CREATE DATABASE IF NOT EXISTS baiyue_file
  DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci;
USE baiyue_file;

CREATE TABLE IF NOT EXISTS file_object (
  id BIGINT UNSIGNED NOT NULL COMMENT '文件ID（雪花ID）',
  tenant_id BIGINT UNSIGNED NOT NULL COMMENT '数据所属租户ID',
  business_type VARCHAR(32) NULL COMMENT '关联业务类型',
  business_id VARCHAR(64) NULL COMMENT '关联业务逻辑ID',
  original_name VARCHAR(255) NOT NULL COMMENT '原始文件名',
  object_key VARCHAR(512) NOT NULL COMMENT '对象存储键',
  storage_provider VARCHAR(32) NOT NULL COMMENT '存储提供方',
  bucket_name VARCHAR(128) NOT NULL COMMENT '存储桶名称',
  content_type VARCHAR(128) NOT NULL COMMENT '文件内容类型',
  size_bytes BIGINT UNSIGNED NOT NULL COMMENT '文件字节数',
  sha256 CHAR(64) NULL COMMENT '文件SHA-256摘要',
  status VARCHAR(24) NOT NULL DEFAULT 'ACTIVE' COMMENT '文件状态',
  created_by BIGINT UNSIGNED NOT NULL COMMENT '创建人ID',
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '创建时间',
  updated_by BIGINT UNSIGNED NOT NULL COMMENT '最后修改人ID',
  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3) COMMENT '更新时间',
  deleted TINYINT(1) NOT NULL DEFAULT 0 COMMENT '逻辑删除标记',
  version INT NOT NULL DEFAULT 0 COMMENT '乐观锁版本号',
  PRIMARY KEY (id),
  UNIQUE KEY uk_file_tenant_object (tenant_id, object_key),
  KEY idx_file_tenant_business (tenant_id, business_type, business_id),
  KEY idx_file_tenant_created (tenant_id, created_at)
) ENGINE=InnoDB COMMENT='文件元数据表';

CREATE TABLE IF NOT EXISTS file_download_token (
  id BIGINT UNSIGNED NOT NULL COMMENT '下载令牌ID',
  tenant_id BIGINT UNSIGNED NOT NULL COMMENT '数据所属租户ID',
  file_id BIGINT UNSIGNED NOT NULL COMMENT '文件逻辑ID',
  token_hash CHAR(64) NOT NULL COMMENT '下载令牌SHA-256摘要',
  expires_at DATETIME(3) NOT NULL COMMENT '过期时间',
  max_downloads INT UNSIGNED NOT NULL DEFAULT 1 COMMENT '最大下载次数',
  download_count INT UNSIGNED NOT NULL DEFAULT 0 COMMENT '已下载次数',
  revoked_at DATETIME(3) NULL COMMENT '撤销时间',
  created_by BIGINT UNSIGNED NOT NULL COMMENT '创建人ID',
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '创建时间',
  PRIMARY KEY (id),
  UNIQUE KEY uk_download_token_hash (token_hash),
  KEY idx_download_file (tenant_id, file_id),
  KEY idx_download_expiry (expires_at)
) ENGINE=InnoDB COMMENT='临时下载授权令牌表';

CREATE TABLE IF NOT EXISTS file_download_log (
  id BIGINT UNSIGNED NOT NULL COMMENT '下载日志ID',
  tenant_id BIGINT UNSIGNED NOT NULL COMMENT '数据所属租户ID',
  file_id BIGINT UNSIGNED NOT NULL COMMENT '文件逻辑ID',
  user_id BIGINT UNSIGNED NULL COMMENT '下载用户ID',
  request_id VARCHAR(64) NULL COMMENT '请求ID',
  client_ip VARCHAR(64) NULL COMMENT '客户端IP',
  result VARCHAR(16) NOT NULL COMMENT '下载结果',
  failure_reason VARCHAR(500) NULL COMMENT '失败原因',
  downloaded_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '下载时间',
  PRIMARY KEY (id),
  KEY idx_download_log_file (tenant_id, file_id, downloaded_at),
  KEY idx_download_log_user (tenant_id, user_id, downloaded_at)
) ENGINE=InnoDB COMMENT='文件下载审计日志表';

CREATE TABLE IF NOT EXISTS file_export_task (
  id BIGINT UNSIGNED NOT NULL COMMENT '导出任务ID（雪花ID）',
  tenant_id BIGINT UNSIGNED NOT NULL COMMENT '申请人所属租户ID，平台任务为0',
  app_code VARCHAR(24) NOT NULL COMMENT '申请端：PLATFORM或MERCHANT',
  task_no VARCHAR(40) NOT NULL COMMENT '导出任务编号',
  export_type VARCHAR(64) NOT NULL COMMENT '导出类型',
  format VARCHAR(16) NOT NULL DEFAULT 'XLSX' COMMENT '导出格式',
  task_name VARCHAR(128) NOT NULL COMMENT '任务名称',
  parameters_json JSON NOT NULL COMMENT '筛选条件快照',
  status VARCHAR(24) NOT NULL DEFAULT 'PENDING' COMMENT 'PENDING/RUNNING/SUCCEEDED/FAILED/EXPIRED',
  total_rows BIGINT UNSIGNED NULL COMMENT '预计总行数',
  processed_rows BIGINT UNSIGNED NOT NULL DEFAULT 0 COMMENT '已处理行数',
  file_name VARCHAR(255) NULL COMMENT '下载文件名',
  object_key VARCHAR(512) NULL COMMENT '存储对象键',
  content_type VARCHAR(128) NULL COMMENT '文件类型',
  size_bytes BIGINT UNSIGNED NULL COMMENT '文件字节数',
  failure_message VARCHAR(1000) NULL COMMENT '失败原因',
  dispatch_version INT NOT NULL DEFAULT 1 COMMENT '派发版本，仅执行重试时递增',
  attempt_count INT NOT NULL DEFAULT 0 COMMENT '已执行尝试次数',
  max_attempts INT NOT NULL DEFAULT 3 COMMENT '自动重试上限',
  next_retry_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '允许执行的最早时间',
  lease_owner VARCHAR(128) NULL COMMENT '当前执行实例标识',
  lease_until DATETIME(3) NULL COMMENT '执行租约截止时间',
  last_heartbeat_at DATETIME(3) NULL COMMENT '最后心跳时间',
  execution_deadline_at DATETIME(3) NULL COMMENT '本次执行截止时间',
  requested_by BIGINT UNSIGNED NOT NULL COMMENT '申请用户ID',
  requested_username VARCHAR(128) NULL COMMENT '申请账号快照',
  requested_at DATETIME(3) NOT NULL COMMENT '申请时间',
  started_at DATETIME(3) NULL COMMENT '开始时间',
  completed_at DATETIME(3) NULL COMMENT '完成时间',
  expires_at DATETIME(3) NULL COMMENT '文件过期时间',
  created_by BIGINT UNSIGNED NULL COMMENT '创建人ID',
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) COMMENT '创建时间',
  updated_by BIGINT UNSIGNED NULL COMMENT '最后修改人ID',
  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3) COMMENT '更新时间',
  deleted TINYINT(1) NOT NULL DEFAULT 0 COMMENT '逻辑删除标记',
  version INT NOT NULL DEFAULT 0 COMMENT '乐观锁版本号',
  PRIMARY KEY (id),
  UNIQUE KEY uk_file_export_task_no (task_no),
  KEY idx_file_export_owner (tenant_id, app_code, requested_by, requested_at),
  KEY idx_file_export_status (status, requested_at),
  KEY idx_file_export_dispatch (status, next_retry_at, id),
  KEY idx_file_export_lease (status, lease_until),
  KEY idx_file_export_expiry (status, expires_at)
) ENGINE=InnoDB COMMENT='公共异步导出任务表';

CREATE TABLE IF NOT EXISTS file_export_task_guard (
  guard_key VARCHAR(64) NOT NULL COMMENT '任务创建串行化锁键',
  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (guard_key)
) ENGINE=InnoDB COMMENT='导出任务创建并发保护表：低频创建入口使用单行锁保证重复提交及活动上限';

INSERT IGNORE INTO file_export_task_guard (guard_key) VALUES ('GLOBAL_CREATE');

CREATE TABLE IF NOT EXISTS file_export_outbox (
  id BIGINT UNSIGNED NOT NULL COMMENT 'Outbox记录ID',
  event_id VARCHAR(64) NOT NULL COMMENT '投递意图唯一标识',
  task_id BIGINT UNSIGNED NOT NULL COMMENT '关联导出任务ID',
  dispatch_version INT NOT NULL COMMENT '任务派发版本',
  topic VARCHAR(128) NOT NULL COMMENT '目标Topic',
  tag VARCHAR(64) NOT NULL COMMENT '消息Tag',
  message_key VARCHAR(64) NOT NULL COMMENT '消息Key',
  payload_json JSON NOT NULL COMMENT '命令消息体',
  status VARCHAR(24) NOT NULL DEFAULT 'PENDING' COMMENT 'PENDING/CLAIMED/SENT/QUARANTINED',
  attempt_count INT NOT NULL DEFAULT 0 COMMENT '累计发送尝试次数',
  next_retry_at DATETIME(3) NOT NULL COMMENT '允许发送的最早时间',
  lease_owner VARCHAR(128) NULL COMMENT '领取实例标识',
  lease_until DATETIME(3) NULL COMMENT '领取租约截止时间',
  sent_at DATETIME(3) NULL COMMENT '发送成功时间',
  last_error VARCHAR(1000) NULL COMMENT '最后发送错误',
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (id),
  UNIQUE KEY uk_file_export_outbox_event (event_id),
  UNIQUE KEY uk_file_export_outbox_task_version (task_id, dispatch_version),
  KEY idx_file_export_outbox_publish (status, next_retry_at, id),
  KEY idx_file_export_outbox_task (task_id, dispatch_version, status, sent_at)
) ENGINE=InnoDB COMMENT='导出命令事务Outbox表';