const API = require("../../../lib/API")
const db = require("../../../plugin/DataBase/db")
const AccessControl = require("../../../lib/AccessControl")
const { BaseStdResponse } = require("../../../BaseStdResponse")

class ApproveSendCountRequest extends API {
    constructor() {
        super()
        this.setPath("/Admin/Goods/SendCountRequest/Approve")
        this.setMethod("POST")
    }

    async onRequest(req, res) {
        let { uuid, session, id } = req.body
        id = Number(id)

        if ([uuid, session, id].some(value => value === "" || value === null || value === undefined || Number.isNaN(id)))
            return res.json({ ...BaseStdResponse.MISSING_PARAMETER })

        if (!Number.isInteger(id) || id <= 0)
            return res.json({ ...BaseStdResponse.ERR, msg: "参数错误" })

        if (!await AccessControl.checkSession(uuid, session))
            return res.status(401).json({ ...BaseStdResponse.ACCESS_DENIED })

        let permission = await AccessControl.getPermission(uuid)
        if (!permission.includes("admin") && !permission.includes("service"))
            return res.json({ ...BaseStdResponse.PERMISSION_DENIED })

        const conn = await db.connect()
        try {
            await conn.beginTransaction()

            const [requestRows] = await conn.execute(
                `SELECT id, receiver_user_id, count, status
                 FROM lepao_send_count_request
                 WHERE id = ?
                 FOR UPDATE`,
                [id]
            )

            if (!requestRows || requestRows.length !== 1) {
                await conn.rollback()
                return res.json({ ...BaseStdResponse.MISSING_FILE, msg: "未找到赠送申请记录！" })
            }

            const request = requestRows[0]
            if (request.status !== "pending") {
                await conn.rollback()
                return res.json({ ...BaseStdResponse.ERR, msg: "该申请已审核，请刷新后重试！" })
            }

            const [incResult] = await conn.execute(
                "UPDATE users SET lepao_count = lepao_count + ? WHERE id = ?",
                [request.count, request.receiver_user_id]
            )
            if (!incResult || incResult.affectedRows !== 1) {
                await conn.rollback()
                return res.json({ ...BaseStdResponse.ERR, msg: "接收用户不存在，审核通过失败！" })
            }

            const [updateResult] = await conn.execute(
                `UPDATE lepao_send_count_request
                 SET status = 'approved', reviewer_uuid = ?, reviewed_at = NOW(), reject_reason = NULL
                 WHERE id = ?`,
                [uuid, id]
            )
            if (!updateResult || updateResult.affectedRows !== 1) {
                await conn.rollback()
                return res.json({ ...BaseStdResponse.ERR, msg: "更新审核状态失败，请稍后再试！" })
            }

            await conn.commit()
            return res.json({ ...BaseStdResponse.OK, msg: "审核通过成功" })
        } catch (err) {
            try { await conn.rollback() } catch (_) { }
            this.logger.error(`审核通过赠送申请失败！${err.message || "未知错误"}`)
            return res.json({ ...BaseStdResponse.ERR, msg: "审核通过失败，请稍后再试！" })
        }
    }
}

module.exports.ApproveSendCountRequest = ApproveSendCountRequest