-- ============================================================
-- 增量更新脚本：客户管理模块结构补全
-- 日期：2026-08-23
-- 数据库：PostgreSQL 15+ (xintong)
-- 说明：客户管理核心模块（客户信息/客户部门/客户访问账号）表结构
--       与 Sequelize Entity 定义对齐，补齐缺失列、索引及 updated_at 触发器。
--       脚本幂等，可重复执行。
--
-- 更新内容：
--   1. customer 表
--      - 新增列 customer_no  VARCHAR(64) NOT NULL UNIQUE（客户业务编号）
--      - 新增列 salesman_id  BIGINT REFERENCES sys_user(id)（负责业务员）
--      - 新增索引 idx_customer_salesman (salesman_id)
--      - 新增索引 idx_customer_status   (status)
--   2. customer_department 表
--      - 新增列 updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
--      - 新增触发器 trg_customer_department_updated_at
--      - 重命名索引 idx_cust_dept_customer → idx_dept_customer（若新索引已存在则删除旧索引）
--   3. customer_account 表
--      - 新增列 updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
--      - 新增触发器 trg_customer_account_updated_at
--      - 新增索引 idx_account_customer (customer_id)
--      - 重命名唯一索引 idx_cust_account_phone → uk_account_phone
--
-- 用法：
--   psql -U postgres -d xintong -f 20260823_customer_module.sql
-- ============================================================

BEGIN;

-- ============================================================
-- 1. customer 表：补 customer_no、salesman_id 列及索引
-- ============================================================

-- 1.1 新增 customer_no 列（客户业务编号 KH+YYYYMMDD+3位序号）
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_name = 'customer' AND column_name = 'customer_no'
    ) THEN
        ALTER TABLE customer ADD COLUMN customer_no VARCHAR(64) NOT NULL;
        ALTER TABLE customer ADD CONSTRAINT uk_customer_no UNIQUE (customer_no);
        COMMENT ON COLUMN customer.customer_no IS '客户业务编号（KH+YYYYMMDD+3位序号）';
        RAISE NOTICE 'customer: 已新增列 customer_no';
    ELSE
        RAISE NOTICE 'customer: 列 customer_no 已存在，跳过';
    END IF;
END $$;

-- 1.2 新增 salesman_id 列（负责业务员，关联 sys_user.id）
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_name = 'customer' AND column_name = 'salesman_id'
    ) THEN
        ALTER TABLE customer ADD COLUMN salesman_id BIGINT REFERENCES sys_user(id);
        COMMENT ON COLUMN customer.salesman_id IS '负责业务员（→ sys_user.id）';
        RAISE NOTICE 'customer: 已新增列 salesman_id';
    ELSE
        RAISE NOTICE 'customer: 列 salesman_id 已存在，跳过';
    END IF;
END $$;

-- 1.3 新增索引 idx_customer_salesman
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM pg_indexes WHERE tablename = 'customer' AND indexname = 'idx_customer_salesman'
    ) THEN
        CREATE INDEX idx_customer_salesman ON customer (salesman_id);
        RAISE NOTICE 'customer: 已创建索引 idx_customer_salesman';
    ELSE
        RAISE NOTICE 'customer: 索引 idx_customer_salesman 已存在，跳过';
    END IF;
END $$;

-- 1.4 新增索引 idx_customer_status
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM pg_indexes WHERE tablename = 'customer' AND indexname = 'idx_customer_status'
    ) THEN
        CREATE INDEX idx_customer_status ON customer (status);
        RAISE NOTICE 'customer: 已创建索引 idx_customer_status';
    ELSE
        RAISE NOTICE 'customer: 索引 idx_customer_status 已存在，跳过';
    END IF;
END $$;

-- ============================================================
-- 2. customer_department 表：补 updated_at 列、触发器，重命名索引
-- ============================================================

-- 2.1 新增 updated_at 列
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_name = 'customer_department' AND column_name = 'updated_at'
    ) THEN
        ALTER TABLE customer_department
            ADD COLUMN updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW();
        COMMENT ON COLUMN customer_department.updated_at IS '更新时间';
        RAISE NOTICE 'customer_department: 已新增列 updated_at';
    ELSE
        RAISE NOTICE 'customer_department: 列 updated_at 已存在，跳过';
    END IF;
END $$;

-- 2.2 新增 updated_at 触发器
DROP TRIGGER IF EXISTS trg_customer_department_updated_at ON customer_department;
CREATE TRIGGER trg_customer_department_updated_at BEFORE UPDATE ON customer_department
    FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();

-- 2.3 重命名索引 idx_cust_dept_customer → idx_dept_customer
DO $$
BEGIN
    IF EXISTS (
        SELECT 1 FROM pg_indexes WHERE tablename = 'customer_department' AND indexname = 'idx_cust_dept_customer'
    ) AND NOT EXISTS (
        SELECT 1 FROM pg_indexes WHERE tablename = 'customer_department' AND indexname = 'idx_dept_customer'
    ) THEN
        ALTER INDEX idx_cust_dept_customer RENAME TO idx_dept_customer;
        RAISE NOTICE 'customer_department: 已重命名索引 idx_cust_dept_customer → idx_dept_customer';
    ELSE
        RAISE NOTICE 'customer_department: 索引重命名已跳过（源不存在或目标已存在）';
    END IF;
END $$;

-- 2.4 删除可能残留的旧索引 idx_cust_dept_customer（新旧并存时清理冗余）
DROP INDEX IF EXISTS idx_cust_dept_customer;

-- 2.5 兜底：确保 idx_dept_customer 存在
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM pg_indexes WHERE tablename = 'customer_department' AND indexname = 'idx_dept_customer'
    ) THEN
        CREATE INDEX idx_dept_customer ON customer_department (customer_id);
        RAISE NOTICE 'customer_department: 已创建索引 idx_dept_customer';
    ELSE
        RAISE NOTICE 'customer_department: 索引 idx_dept_customer 已存在，跳过';
    END IF;
END $$;

-- ============================================================
-- 3. customer_account 表：补 updated_at 列、触发器，新增/重命名索引
-- ============================================================

-- 3.1 新增 updated_at 列
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_name = 'customer_account' AND column_name = 'updated_at'
    ) THEN
        ALTER TABLE customer_account
            ADD COLUMN updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW();
        COMMENT ON COLUMN customer_account.updated_at IS '更新时间';
        RAISE NOTICE 'customer_account: 已新增列 updated_at';
    ELSE
        RAISE NOTICE 'customer_account: 列 updated_at 已存在，跳过';
    END IF;
END $$;

-- 3.2 新增 updated_at 触发器
DROP TRIGGER IF EXISTS trg_customer_account_updated_at ON customer_account;
CREATE TRIGGER trg_customer_account_updated_at BEFORE UPDATE ON customer_account
    FOR EACH ROW EXECUTE FUNCTION trigger_set_updated_at();

-- 3.3 新增 customer_id 普通索引 idx_account_customer
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM pg_indexes WHERE tablename = 'customer_account' AND indexname = 'idx_account_customer'
    ) THEN
        CREATE INDEX idx_account_customer ON customer_account (customer_id);
        RAISE NOTICE 'customer_account: 已创建索引 idx_account_customer';
    ELSE
        RAISE NOTICE 'customer_account: 索引 idx_account_customer 已存在，跳过';
    END IF;
END $$;

-- 3.4 重命名唯一索引 idx_cust_account_phone → uk_account_phone
DO $$
BEGIN
    IF EXISTS (
        SELECT 1 FROM pg_indexes WHERE tablename = 'customer_account' AND indexname = 'idx_cust_account_phone'
    ) AND NOT EXISTS (
        SELECT 1 FROM pg_indexes WHERE tablename = 'customer_account' AND indexname = 'uk_account_phone'
    ) THEN
        ALTER INDEX idx_cust_account_phone RENAME TO uk_account_phone;
        RAISE NOTICE 'customer_account: 已重命名索引 idx_cust_account_phone → uk_account_phone';
    ELSE
        RAISE NOTICE 'customer_account: 索引重命名已跳过（源不存在或目标已存在）';
    END IF;
END $$;

-- 3.5 兜底：确保 uk_account_phone 存在
DO $$
BEGIN
    IF NOT EXISTS (
        SELECT 1 FROM pg_indexes WHERE tablename = 'customer_account' AND indexname = 'uk_account_phone'
    ) THEN
        CREATE UNIQUE INDEX uk_account_phone ON customer_account (phone);
        RAISE NOTICE 'customer_account: 已创建唯一索引 uk_account_phone';
    ELSE
        RAISE NOTICE 'customer_account: 索引 uk_account_phone 已存在，跳过';
    END IF;
END $$;

COMMIT;

-- ============================================================
-- 验证查询（可选，不报错即表示结构正确）
-- ============================================================
SELECT 'customer' AS tbl, column_name FROM information_schema.columns
    WHERE table_name = 'customer' AND column_name IN ('customer_no', 'salesman_id')
UNION ALL
SELECT 'customer_department', column_name FROM information_schema.columns
    WHERE table_name = 'customer_department' AND column_name = 'updated_at'
UNION ALL
SELECT 'customer_account', column_name FROM information_schema.columns
    WHERE table_name = 'customer_account' AND column_name = 'updated_at'
ORDER BY tbl, column_name;