-- 代理在线扫码充值：请求幂等、付款内容与待处理查询索引。
DO $$
BEGIN
    IF EXISTS (
        SELECT 1
        FROM tb_payment
        WHERE third_party_trade_no IS NOT NULL
          AND third_party_trade_no <> ''
        GROUP BY payment_method, third_party_trade_no
        HAVING COUNT(*) > 1
    ) THEN
        RAISE EXCEPTION '检测到重复的支付方式与第三方交易号，请先人工核对资金事实';
    END IF;
END
$$;

ALTER TABLE tb_agent_recharge_record
    ADD COLUMN request_id varchar(64),
    ADD COLUMN request_fingerprint varchar(64);

ALTER TABLE tb_payment
    ADD COLUMN qr_content text;

CREATE UNIQUE INDEX uk_agent_recharge_user_request
    ON tb_agent_recharge_record (user_id, request_id)
    WHERE request_id IS NOT NULL AND request_id <> '';

CREATE UNIQUE INDEX uk_payment_method_trade_no
    ON tb_payment (payment_method, third_party_trade_no)
    WHERE third_party_trade_no IS NOT NULL AND third_party_trade_no <> '';

CREATE INDEX idx_agent_recharge_online_pending
    ON tb_agent_recharge_record (status, created_at, id)
    WHERE deleted_at IS NULL AND payment_method IN ('wechat', 'alipay') AND status IN (1, 2, 4);

CREATE INDEX idx_payment_agent_recharge_pending
    ON tb_payment (status, created_at, id)
    WHERE deleted_at IS NULL AND order_type = 'agent_recharge' AND status = 0;

COMMENT ON COLUMN tb_agent_recharge_record.request_id IS '提交账号提供的在线充值幂等请求标识';
COMMENT ON COLUMN tb_agent_recharge_record.request_fingerprint IS '在线充值请求业务字段指纹';
COMMENT ON COLUMN tb_payment.qr_content IS '支付渠道返回的原始扫码付款内容，禁止写入日志或普通查询响应';