-- 支付创建提交时的路由尝试事实，以及明确失败自动禁用的安全留痕。
-- 关联只保存 ID，不保存凭证、原始响应或敏感渠道载荷。
CREATE TABLE tb_payment_merchant_routing_attempt (
    id            BIGSERIAL PRIMARY KEY,
    payment_id    BIGINT NOT NULL,
    merchant_id   BIGINT NOT NULL,
    pool_id       BIGINT NOT NULL,
    routing_epoch BIGINT NOT NULL,
    amount        BIGINT NOT NULL,
    result_class  VARCHAR(32) NOT NULL DEFAULT 'pending',
    created_at    TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT uk_payment_merchant_routing_attempt_payment UNIQUE (payment_id),
    CONSTRAINT chk_payment_merchant_routing_attempt_epoch CHECK (routing_epoch >= 1),
    CONSTRAINT chk_payment_merchant_routing_attempt_amount CHECK (amount > 0),
    CONSTRAINT chk_payment_merchant_routing_attempt_result CHECK (result_class IN ('pending', 'success', 'explicit_failed', 'unknown', 'not_sent', 'cancelled'))
);
CREATE INDEX idx_payment_merchant_routing_attempt_select
    ON tb_payment_merchant_routing_attempt (pool_id, routing_epoch, created_at, merchant_id, id);
CREATE INDEX idx_payment_merchant_routing_attempt_merchant
    ON tb_payment_merchant_routing_attempt (merchant_id, created_at, id);

CREATE TABLE tb_payment_merchant_failure (
    id                    BIGSERIAL PRIMARY KEY,
    payment_id            BIGINT NOT NULL,
    payment_no            VARCHAR(40) NOT NULL,
    merchant_id           BIGINT NOT NULL,
    pool_id               BIGINT NOT NULL,
    result_class          VARCHAR(32) NOT NULL,
    failure_reason        VARCHAR(128) NOT NULL DEFAULT '',
    merchant_status_before SMALLINT NOT NULL,
    merchant_status_after  SMALLINT NOT NULL,
    occurred_at           TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    created_at            TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT chk_payment_merchant_failure_result CHECK (result_class = 'explicit_failed')
);
CREATE INDEX idx_payment_merchant_failure_merchant_time
    ON tb_payment_merchant_failure (merchant_id, occurred_at DESC, id DESC);
CREATE INDEX idx_payment_merchant_failure_payment
    ON tb_payment_merchant_failure (payment_id, occurred_at DESC, id DESC);

COMMENT ON TABLE tb_payment_merchant_routing_attempt IS '新支付创建提交时冻结路由的一次不可变尝试事实，不依赖最终支付结果';
COMMENT ON COLUMN tb_payment_merchant_routing_attempt.result_class IS '尝试结果分类：pending/success/explicit_failed/unknown/not_sent/cancelled';
COMMENT ON TABLE tb_payment_merchant_failure IS '支付商户明确预下单失败及自动禁用的安全调查留痕，不保存凭证或原始响应';
COMMENT ON COLUMN tb_payment_merchant_failure.failure_reason IS '脱敏稳定失败原因编码或摘要';