<?php

namespace App\Logics\QRService;

use App\Contexts\Model\Deposit as ContextDeposit;
use App\Contexts\Model\Shop as ContextShop;
use App\Exceptions\AppCommonException;
use App\Models\HtpmsCustomer\Deposit\Deposit;
use App\Models\HtpmsCustomer\Deposit\DepositTransfer;
use App\Models\HtpmsCustomer\Mst\Shop;
use App\Util\DateUtil;
use LogicException;

trait DepositCheck
{
    protected static function canCreate(string $shopId): bool
    {
        [$shop, $deposit] = self::getData($shopId);
        return self::checkDepositWhenCertificate($shop, $deposit);
    }
    protected static function canCertificate(string $shopId): bool
    {
        [$shop, $deposit] = self::getData($shopId);
        return self::checkDepositWhenCertificate($shop, $deposit);
    }
    protected static function canUseDeposit(string $shopId, $amount): bool
    {
        [$shop, $deposit] = self::getData($shopId);
        return self::checkDepositWhenUse($shop, $deposit, $amount);
    }

    protected static function useDeposit(
        string $shopId,
        int $amount,
    ) {
        // データ取得
        [$shop, $deposit] = self::getData($shopId);

        if (!self::checkDepositWhenUse($shop, $deposit, $amount)) {
            throw new AppCommonException("利用時残高不足");
        }

        // 異動履歴作成
        $history = self::makeTransferHistory($shopId, -1 * $amount);

        // デポジット減算
        $deposit->deposit -= $amount;

        // 保存
        $deposit->save();
        $history->save();
    }

    /**
     * デポジット異動履歴の作成 amountはdepositを使う場合は負の整数、チャージする場合は正の整数
     */
    protected static function makeTransferHistory(string $shopId, int $amount): DepositTransfer
    {
        [$shop, $deposit] = self::getData($shopId);
        $transfer = new DepositTransfer();
        $transfer->shop_id = $shopId;
        $transfer->transfer_datetime = DateUtil::now();
        $transfer->transfer_amount = -1 * $amount;
        $transfer->before_amount = $deposit->deposit;
        $transfer->after_amount =  $deposit->deposit + $amount;
        return $transfer;
    }

    /**
     * @param string $shopId
     * @return array{Shop, Deposit}
     */
    protected static function getData(string $shopId)
    {
        // データ取得 コンテキストから取得する

        $shop = ContextShop::instance()->get();
        $deposit = ContextDeposit::instance()->get();

        if ($shop === null) {
            $shop = Shop::whereId($shopId)->firstOrFail();
            ContextShop::instance()->set($shop);
        } else {
            // 確認
            if ($shopId !== $shop->id) {
                throw new LogicException("コンテキスト不正");
            }
        }
        if ($deposit === null) {
            $deposit = Deposit::whereShopId($shopId)->firstOrFail();
            ContextDeposit::instance()->set($deposit);
        } else {
            // 確認
            if ($shopId !== $deposit->shop_id) {
                throw new LogicException("コンテキスト不正");
            }
        }

        return [$shop, $deposit];
    }

    private static function checkDepositWhenUse(Shop $shop, Deposit $deposit, int $amount)
    {
        return $shop->under_amount_when_use < $deposit->deposit - $amount;
    }
    private static function checkDepositWhenCertificate(Shop $shop, Deposit $deposit)
    {
        return $shop->under_amount_when_auth < $deposit->deposit;
    }
    private static function checkDepositWhenCreate(Shop $shop, Deposit $deposit)
    {
        return $shop->under_amount_when_create < $deposit->deposit;
    }
}