-- 勘察改造：移除 SOP（勘察技术要点与回执标准），新增「勘察明细」survey_detail
-- 语义：勘察明细按「客户空间拓扑」登记，一条明细 = 建筑 + 楼层 + 房间(可空) + 现场照片 + 备注。
-- 幂等：CREATE TABLE IF NOT EXISTS / DROP TABLE IF EXISTS / 触发器先 DROP 后建，可重复执行。
BEGIN;

-- 1. 新增勘察明细表
CREATE TABLE IF NOT EXISTS survey_detail (
    id              BIGSERIAL PRIMARY KEY,
    survey_order_id BIGINT       NOT NULL REFERENCES survey_order(id) ON DELETE CASCADE,
    building_id     BIGINT,
    building_name   VARCHAR(128),
    floor_no        VARCHAR(16),
    room_id         BIGINT,
    room_name       VARCHAR(128),
    photos          TEXT,
    remark          VARCHAR(255),
    created_at      TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
    updated_at      TIMESTAMPTZ  NOT NULL DEFAULT NOW()
);

COMMENT ON TABLE  survey_detail IS '勘察工单明细表（建筑/楼层/房间 + 现场照片）';
COMMENT ON COLUMN survey_detail.id              IS '自增主键';
COMMENT ON COLUMN survey_detail.survey_order_id IS '勘察工单ID（→ survey_order）';
COMMENT ON COLUMN survey_detail.building_id     IS '建筑ID（→ customer_building）';
COMMENT ON COLUMN survey_detail.building_name   IS '建筑名称（冗余，客户拓扑变更后仍可读）';
COMMENT ON COLUMN survey_detail.floor_no        IS '所在楼层：正数为地上、负数为地下，如 1 / -1';
COMMENT ON COLUMN survey_detail.room_id         IS '房间ID（→ customer_room，可空）';
COMMENT ON COLUMN survey_detail.room_name       IS '房间名称（冗余，可空）';
COMMENT ON COLUMN survey_detail.photos          IS '现场照片对象key(JSON数组字符串)';
COMMENT ON COLUMN survey_detail.remark          IS '备注';
COMMENT ON COLUMN survey_detail.created_at      IS '创建时间';
COMMENT ON COLUMN survey_detail.updated_at      IS '更新时间';

CREATE INDEX IF NOT EXISTS idx_survey_detail_order ON survey_detail (survey_order_id);

DROP TRIGGER IF EXISTS trg_survey_detail_updated_at ON survey_detail;
CREATE TRIGGER trg_survey_detail_updated_at BEFORE UPDATE ON survey_detail
    FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();

-- 2. 移除 SOP 两张表（回执表先删，避免外键依赖）
DROP TABLE IF EXISTS survey_sop_result CASCADE;
DROP TABLE IF EXISTS survey_sop_item CASCADE;

COMMIT;