-- 创建退款申请表
CREATE TABLE IF NOT EXISTS tb_refund_request (
    id BIGSERIAL PRIMARY KEY,
    created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
    deleted_at TIMESTAMP WITH TIME ZONE,
    creator BIGINT NOT NULL DEFAULT 0,
    updater BIGINT NOT NULL DEFAULT 0,

    -- 退款单基础信息
    refund_no VARCHAR(50) NOT NULL,
    order_id BIGINT NOT NULL,
    package_usage_id BIGINT,
    shop_id BIGINT,

    -- 金额信息
    actual_received_amount BIGINT NOT NULL,
    requested_refund_amount BIGINT NOT NULL,
    approved_refund_amount BIGINT,

    -- 退款原因和状态
    refund_reason TEXT,
    status INT NOT NULL DEFAULT 1,

    -- 审批信息
    processor_id BIGINT,
    processed_at TIMESTAMP WITH TIME ZONE,
    reject_reason TEXT,
    remark TEXT,

    -- 后处理标记
    commission_deducted BOOLEAN NOT NULL DEFAULT FALSE,
    asset_reset BOOLEAN NOT NULL DEFAULT FALSE
);

-- 索引
CREATE UNIQUE INDEX idx_refund_request_refund_no ON tb_refund_request (refund_no) WHERE deleted_at IS NULL;
CREATE INDEX idx_refund_request_order_id ON tb_refund_request (order_id);
CREATE INDEX idx_refund_request_shop_id ON tb_refund_request (shop_id);
CREATE INDEX idx_refund_request_status ON tb_refund_request (status);
CREATE INDEX idx_refund_request_deleted_at ON tb_refund_request (deleted_at);

-- 字段注释
COMMENT ON TABLE tb_refund_request IS '退款申请表';
COMMENT ON COLUMN tb_refund_request.refund_no IS '退款单号（RF+日期时间+6位随机数）';
COMMENT ON COLUMN tb_refund_request.order_id IS '关联订单ID';
COMMENT ON COLUMN tb_refund_request.package_usage_id IS '关联套餐使用记录ID（可选）';
COMMENT ON COLUMN tb_refund_request.shop_id IS '店铺ID（从订单获取，用于数据权限过滤）';
COMMENT ON COLUMN tb_refund_request.actual_received_amount IS '实收金额（分）';
COMMENT ON COLUMN tb_refund_request.requested_refund_amount IS '申请退款金额（分）';
COMMENT ON COLUMN tb_refund_request.approved_refund_amount IS '审批实际退款金额（分）';
COMMENT ON COLUMN tb_refund_request.refund_reason IS '退款原因';
COMMENT ON COLUMN tb_refund_request.status IS '状态 1-待审批 2-已通过 3-已拒绝 4-已退回';
COMMENT ON COLUMN tb_refund_request.processor_id IS '审批人ID';
COMMENT ON COLUMN tb_refund_request.processed_at IS '审批时间';
COMMENT ON COLUMN tb_refund_request.reject_reason IS '拒绝原因';
COMMENT ON COLUMN tb_refund_request.remark IS '审批备注';
COMMENT ON COLUMN tb_refund_request.commission_deducted IS '佣金是否已回扣';
COMMENT ON COLUMN tb_refund_request.asset_reset IS '资产是否已重置（套餐停用+停机+世代重置）';