-- Petstore Phase 0: create stable store-customer relationship master.
-- Target: MySQL. Run after 20260801_split_service_identity.sql.
-- One-time migration; back up the database before execution.

CREATE TABLE t_store_customer (
    id BIGINT NOT NULL AUTO_INCREMENT,
    store_id BIGINT NOT NULL COMMENT '门店 ID',
    customer_user_id BIGINT NULL COMMENT '全局 customer 账号，留资客户可空',
    phone VARCHAR(20) NULL COMMENT '本店最后确认的联系手机号',
    display_name VARCHAR(64) NULL COMMENT '门店视角客户称呼',
    source VARCHAR(32) NOT NULL COMMENT '首次来源',
    first_contact_at DATETIME NULL COMMENT '首次接触时间',
    last_contact_at DATETIME NULL COMMENT '最近接触时间',
    create_time DATETIME NOT NULL,
    update_time DATETIME NOT NULL,
    deleted TINYINT(1) NOT NULL DEFAULT 0,
    PRIMARY KEY (id),
    UNIQUE KEY uk_store_customer_user (store_id, customer_user_id),
    UNIQUE KEY uk_store_customer_phone (store_id, phone),
    KEY idx_store_customer_active_update (store_id, deleted, update_time),
    KEY idx_store_customer_last_contact (store_id, last_contact_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='门店客户关系主档';

-- 历史预约客户建档。旧数据无法精确确定首次是自助或代客，统一记为 appointment。
INSERT INTO t_store_customer (
    store_id,
    customer_user_id,
    phone,
    display_name,
    source,
    first_contact_at,
    last_contact_at,
    create_time,
    update_time,
    deleted
)
SELECT
    a.store_id,
    a.customer_user_id,
    MAX(u.phone),
    MAX(COALESCE(NULLIF(u.name, ''), NULLIF(u.username, ''), '客户')),
    'appointment',
    MIN(COALESCE(a.create_time, a.appointment_time, NOW())),
    MAX(COALESCE(a.update_time, a.create_time, a.appointment_time, NOW())),
    NOW(),
    NOW(),
    0
FROM t_appointment a
JOIN t_user u
    ON u.id = a.customer_user_id
   AND u.deleted = 0
   AND u.role = 'customer'
WHERE a.deleted = 0
  AND a.store_id IS NOT NULL
  AND a.customer_user_id IS NOT NULL
GROUP BY a.store_id, a.customer_user_id;

-- 报告留资建档。若同店同手机已由预约建档，只更新最近接触时间并保留首次来源。
INSERT INTO t_store_customer (
    store_id,
    customer_user_id,
    phone,
    display_name,
    source,
    first_contact_at,
    last_contact_at,
    create_time,
    update_time,
    deleted
)
SELECT
    l.store_id,
    MAX(CASE WHEN u.role = 'customer' AND u.deleted = 0 THEN u.id ELSE NULL END),
    l.phone,
    MAX(CASE
        WHEN u.role = 'customer' AND u.deleted = 0
            THEN COALESCE(NULLIF(u.name, ''), NULLIF(u.username, ''), '留资客户')
        ELSE '留资客户'
    END),
    'report_lead',
    MIN(COALESCE(l.create_time, NOW())),
    MAX(COALESCE(l.update_time, l.create_time, NOW())),
    NOW(),
    NOW(),
    0
FROM t_report_lead l
LEFT JOIN t_user u
    ON u.phone = l.phone
WHERE l.store_id IS NOT NULL
  AND l.phone IS NOT NULL
  AND l.phone <> ''
GROUP BY l.store_id, l.phone
ON DUPLICATE KEY UPDATE
    customer_user_id = COALESCE(t_store_customer.customer_user_id, VALUES(customer_user_id)),
    phone = COALESCE(t_store_customer.phone, VALUES(phone)),
    display_name = CASE
        WHEN t_store_customer.display_name IS NULL OR t_store_customer.display_name = ''
            THEN VALUES(display_name)
        ELSE t_store_customer.display_name
    END,
    first_contact_at = LEAST(
        COALESCE(t_store_customer.first_contact_at, VALUES(first_contact_at)),
        VALUES(first_contact_at)
    ),
    last_contact_at = GREATEST(
        COALESCE(t_store_customer.last_contact_at, VALUES(last_contact_at)),
        VALUES(last_contact_at)
    ),
    update_time = NOW(),
    deleted = 0;

-- Verification queries. All three counts should be 0 before application release.
SELECT COUNT(*) AS appointments_without_store_customer
FROM t_appointment a
LEFT JOIN t_store_customer sc
    ON sc.store_id = a.store_id
   AND sc.customer_user_id = a.customer_user_id
   AND sc.deleted = 0
WHERE a.deleted = 0
  AND a.customer_user_id IS NOT NULL
  AND sc.id IS NULL;

SELECT COUNT(*) AS leads_without_store_customer
FROM t_report_lead l
LEFT JOIN t_store_customer sc
    ON sc.store_id = l.store_id
   AND sc.phone = l.phone
   AND sc.deleted = 0
WHERE l.store_id IS NOT NULL
  AND l.phone IS NOT NULL
  AND l.phone <> ''
  AND sc.id IS NULL;

SELECT COUNT(*) AS store_customers_linked_to_non_customer
FROM t_store_customer sc
JOIN t_user u ON u.id = sc.customer_user_id
WHERE sc.deleted = 0
  AND (u.deleted <> 0 OR u.role <> 'customer');