CREATE SCHEMA IF NOT EXISTS file;

DROP TABLE IF EXISTS file.tb_sys_file CASCADE;
CREATE TABLE file.tb_sys_file (
  optsn       VARCHAR(50)   NOT NULL,               -- 流水号
  file_id     VARCHAR(50)   NOT NULL,               -- 文件ID
  name   VARCHAR(255)  NOT NULL,               -- 文件名
  path   VARCHAR(255)  NOT NULL,               -- 文件路径
  size   BIGINT        NOT NULL,               -- 文件大小
  type   VARCHAR(50)   NOT NULL,               -- 文件类型
  storage_type VARCHAR(50)   NOT NULL,               -- 存储类型
  mime_type   VARCHAR(255)  NOT NULL,               -- 文件MIME类型
  url    VARCHAR(255)  NOT NULL,               -- 文件URL
  status VARCHAR(50)   NOT NULL,               -- 文件状态
  service_type VARCHAR(50),                         -- 服务类型（bidding/customer_service/internal等）
  dept_path VARCHAR(255)   NOT NULL,               -- 当前部门路径
  creator     VARCHAR(50)   DEFAULT NULL,          -- 创建者
  updater     VARCHAR(50)   DEFAULT NULL,          -- 更新者
  create_time TIMESTAMPTZ   NOT NULL DEFAULT now(), -- 创建时间
  update_time TIMESTAMPTZ   DEFAULT NULL,           -- 更新时间（由触发器维护）
  delete_time TIMESTAMPTZ   DEFAULT NULL,           -- 删除时间
  deleted     BOOLEAN       NOT NULL DEFAULT false, -- 是否删除
  PRIMARY KEY (file_id),
  UNIQUE (optsn)
);
CREATE INDEX idx_file_service ON file.tb_sys_file(service_type) WHERE deleted = false;

COMMENT ON TABLE file.tb_sys_file IS '文件表';
COMMENT ON COLUMN file.tb_sys_file.service_type IS '服务类型（用于服务间数据隔离）';
COMMENT ON COLUMN file.tb_sys_file.optsn IS '流水号';
COMMENT ON COLUMN file.tb_sys_file.file_id IS '文件ID';
COMMENT ON COLUMN file.tb_sys_file.name IS '文件名';
COMMENT ON COLUMN file.tb_sys_file.path IS '文件路径';
COMMENT ON COLUMN file.tb_sys_file.size IS '文件大小';
COMMENT ON COLUMN file.tb_sys_file.type IS '文件类型';
COMMENT ON COLUMN file.tb_sys_file.storage_type IS '存储类型';
COMMENT ON COLUMN file.tb_sys_file.mime_type IS '文件MIME类型';
COMMENT ON COLUMN file.tb_sys_file.url IS '文件URL';
COMMENT ON COLUMN file.tb_sys_file.status IS '文件状态';
COMMENT ON COLUMN file.tb_sys_file.dept_path IS '当前部门路径';
COMMENT ON COLUMN file.tb_sys_file.creator IS '创建者';
COMMENT ON COLUMN file.tb_sys_file.updater IS '更新者';
COMMENT ON COLUMN file.tb_sys_file.create_time IS '创建时间';
COMMENT ON COLUMN file.tb_sys_file.update_time IS '更新时间';
COMMENT ON COLUMN file.tb_sys_file.delete_time IS '删除时间';
COMMENT ON COLUMN file.tb_sys_file.deleted IS '是否删除';

-- =============================
-- 文件关联表
-- =============================
DROP TABLE IF EXISTS file.tb_file_relation CASCADE;
CREATE TABLE file.tb_file_relation (
  optsn         VARCHAR(50)   NOT NULL,
  relation_id   VARCHAR(50)   NOT NULL,
  file_id       VARCHAR(50)   NOT NULL,
  object_type   VARCHAR(50)   NOT NULL,               -- 对象类型：bidding_project/ticket/document等
  object_id     VARCHAR(50)   NOT NULL,               -- 对象ID
  relation_type VARCHAR(30)   DEFAULT 'attachment',   -- 关联类型：attachment-附件/avatar-头像/banner-横幅
  order_num     INTEGER       DEFAULT 0,              -- 排序号
  service_type  VARCHAR(50),                          -- 服务类型（继承自object_type）
  creator       VARCHAR(50)   DEFAULT NULL,           -- 创建者
  updater       VARCHAR(50)   DEFAULT NULL,           -- 更新者
  create_time   TIMESTAMPTZ   NOT NULL DEFAULT now(), -- 创建时间
  update_time   TIMESTAMPTZ   DEFAULT NULL,           -- 更新时间
  delete_time   TIMESTAMPTZ   DEFAULT NULL,           -- 删除时间
  deleted       BOOLEAN       NOT NULL DEFAULT false, -- 是否删除
  PRIMARY KEY (relation_id),
  UNIQUE (optsn),
  FOREIGN KEY (file_id) REFERENCES file.tb_sys_file(file_id)
);

COMMENT ON TABLE file.tb_file_relation IS '文件关联表';
COMMENT ON COLUMN file.tb_file_relation.optsn IS '流水号';
COMMENT ON COLUMN file.tb_file_relation.relation_id IS '关联ID';
COMMENT ON COLUMN file.tb_file_relation.file_id IS '文件ID';
COMMENT ON COLUMN file.tb_file_relation.object_type IS '对象类型：bidding_project/ticket/document等';
COMMENT ON COLUMN file.tb_file_relation.object_id IS '对象ID';
COMMENT ON COLUMN file.tb_file_relation.relation_type IS '关联类型：attachment-附件/avatar-头像/banner-横幅';
COMMENT ON COLUMN file.tb_file_relation.order_num IS '排序号';
COMMENT ON COLUMN file.tb_file_relation.service_type IS '服务类型（继承自object_type）';
COMMENT ON COLUMN file.tb_file_relation.creator IS '创建者';
COMMENT ON COLUMN file.tb_file_relation.updater IS '更新者';
COMMENT ON COLUMN file.tb_file_relation.create_time IS '创建时间';
COMMENT ON COLUMN file.tb_file_relation.update_time IS '更新时间';
COMMENT ON COLUMN file.tb_file_relation.delete_time IS '删除时间';
COMMENT ON COLUMN file.tb_file_relation.deleted IS '是否删除';

CREATE INDEX idx_file_relation_object ON file.tb_file_relation(object_type, object_id) WHERE deleted = false;
CREATE INDEX idx_file_relation_file ON file.tb_file_relation(file_id) WHERE deleted = false;
CREATE INDEX idx_file_relation_service ON file.tb_file_relation(service_type) WHERE deleted = false;