<?php

namespace App\Services;

use App\Exceptions\BizException;
use App\Models\AfterSale;
use App\Models\AfterSaleLog;
use App\Models\OrderProduct;
use App\Models\User;

class AfterSaleService
{
    /**
     * 创建售后单
     *
     * @param User $user
     * @param OrderProduct $orderProduct
     * @param integer $type
     * @param integer $num
     * @param array $params
     * @return AfterSale
     */
    public function create(User $user, OrderProduct $orderProduct, int $type, int $num, array $params): AfterSale
    {
        // if (is_null($orderProduct->after_expire_at)) {
        //     throw new BizException('该订单商品还未签收无法发起售后');
        // }

        // // 校验这个订单商品是否还能发起售后-待完成
        // if ($orderProduct->after_expire_at < now()) {
        //     throw new BizException('该订单商品已过售后时间');
        // }

        // //校验该订单商品不能有已完成、处理中的售后记录
        // if ($orderProduct->after_sale_state > 0) {
        //     throw new BizException('该订单商品已申请售后');
        // }
        if (!$orderProduct->can_after_sale) {
            throw new BizException('该订单商品无法发起售后');
        }

        //校验申请数量不能超过订单商品数量
        if ($num > $orderProduct->quantity) {
            throw new BizException('申请售后的数量不能大于订单商品数量');
        }

        $amount = ($num == $orderProduct->quantity) ? $orderProduct->total_amount : bcmul(bcdiv($orderProduct->total_amount, $orderProduct->quantity), $num);

        $afterSale = AfterSale::create(array_merge($params, [
            'user_id'   => $user->id,
            'order_id'  => $orderProduct->order_id,
            'amount'    => $amount,
            'state'     => AfterSale::STATE_VERIFY,
        ]));

        $orderProduct->after_sale_state = 1;

        return $afterSale;
    }

    /**
     * 是否待审核
     *
     * @param AfterSale $afterSale
     * @return boolean
     */
    protected function isWaitVerify(AfterSale $afterSale)
    {
        return $afterSale->state == $afterSale::STATE_VERIFY;
    }

    /**
     * 是否待补充资料
     *
     * @param AfterSale $afterSale
     * @return boolean
     */
    protected function isWaitApply(AfterSale $afterSale)
    {
        return $afterSale->state == $afterSale::STATE_APPLY;
    }

    /**
     * 是否待确认
     *
     * @param AfterSale $afterSale
     * @return boolean
     */
    protected function isWaitAgree(AfterSale $afterSale)
    {
        return $afterSale->state == $afterSale::STATE_AGREE;
    }

    /**
     * 是否待确认收货
     *
     * @param AfterSale $afterSale
     * @return boolean
     */
    protected function isWaitShipping(AfterSale $afterSale)
    {
        return $afterSale->state == $afterSale::STATE_SHIPPING;
    }

    /**
     * 是否待打款
     *
     * @param AfterSale $afterSale
     * @return boolean
     */
    protected function isWaitFinance(AfterSale $afterSale)
    {
        return $afterSale->state == $afterSale::STATE_FINANCE;
    }

    /**
     * 补充资料申请
     *
     * @param [AfterSale] $afterSale
     * @param array $params
     * @return AfterSale
     */
    public function apply(AfterSale $afterSale, array $params): AfterSale
    {
        if ($this->isWaitApply($afterSale)) {
            $afterSale->update(array_merge($params, [
                'state' => AfterSale::STATE_VERIFY,
            ]));

            AfterSaleLog::create([
                'after_sale_id' => $afterSale->id,
                'name'  => '补充资料',
                'desc'  => $afterSale->description,
                'images' => $afterSale->images,
            ]);
            return $afterSale;
        } else {
            throw new BizException('售后订单状态异常，请稍后再试');
        }
    }

    /**
     * 审核通过
     *
     * @param AfterSale $afterSale
     * @param string $remarks
     * @return void
     */
    public function verify(AfterSale $afterSale, string $remarks, int $amount)
    {
        if ($this->isWaitVerify($afterSale)) {
            switch ($afterSale->type) {
                case AfterSale::TYPE_REFUND_AND_RETURN:
                    $afterSale->update([
                        'amount' => $amount,
                        'state' => $afterSale::STATE_AGREE,
                        'remarks' => $remarks,
                    ]);
                    AfterSaleLog::create([
                        'after_sale_id' => $afterSale->id,
                        'name'  => '客服审核',
                        'desc'  => $remarks,
                    ]);
                    break;
                case AfterSale::TYPE_REFUND:
                    $afterSale->update([
                        'amount' => $amount,
                        'state' => $afterSale::STATE_AGREE,
                        'remarks' => $remarks,
                    ]);
                    AfterSaleLog::create([
                        'after_sale_id' => $afterSale->id,
                        'name'  => '客服审核',
                        'desc'  => $remarks,
                    ]);
                    break;
                case AfterSale::TYPE_CHANGE:
                    $afterSale->update([
                        'state' => $afterSale::STATE_AGREE,
                        'remarks' => $remarks,
                    ]);
                    AfterSaleLog::create([
                        'after_sale_id' => $afterSale->id,
                        'name'  => '客服审核',
                        'desc'  => $remarks,
                    ]);
                    break;
                case AfterSale::TYPE_FILL:
                    $afterSale->update([
                        'state' => $afterSale::STATE_AGREE,
                        'remarks' => $remarks,
                    ]);
                    AfterSaleLog::create([
                        'after_sale_id' => $afterSale->id,
                        'name'  => '客服审核',
                        'desc'  => $remarks,
                    ]);
                    break;
            }
        } else {
            throw new BizException('该售后订单状态异常');
        }
    }

    /**
     * 补充资料
     *
     * @param AfterSale $afterSale
     * @param string $remarks
     * @return void
     */
    public function backApply(AfterSale $afterSale, string $remarks)
    {
        if ($this->isWaitVerify($afterSale)) {
            $afterSale->update([
                'state' => $afterSale::STATE_APPLY,
                'remarks' => $remarks,
            ]);
            AfterSaleLog::create([
                'after_sale_id' => $afterSale->id,
                'name'  => '客服审核',
                'desc'  => $remarks,
            ]);
        } else {
            throw new BizException('该售后订单状态异常');
        }
    }

    public function agree(AfterSale $afterSale, array $params, $remarks = '用户已同意客服审核结果')
    {
        if ($this->isWaitAgree($afterSale)) {
            switch ($afterSale->type) {
                case AfterSale::TYPE_REFUND_AND_RETURN:
                    $afterSale->update([
                        'tracking_number'=>$params['tracking_number'],
                        'remarks'=> $remarks,
                        'state' => AfterSale::STATE_SHIPPING,
                    ]);
                    break;
                case AfterSale::TYPE_REFUND://退款订单
                    $afterSale->update([
                        'remarks'=> $remarks,
                        'state' => AfterSale::STATE_FINANCE,
                    ]);
                    break;
                case AfterSale::TYPE_CHANGE:
                    $afterSale->update([
                        'tracking_number'=>$params['tracking_number'],
                        'remarks' => $remarks,
                        'state' => AfterSale::STATE_SHIPPING,
                    ]);
                    break;
                case AfterSale::TYPE_FILL:
                    $afterSale->update([
                        'remarks' => $remarks,
                        'state' => AfterSale::STATE_FINISH,
                    ]);
                    break;
            }
            AfterSaleLog::create([
                'after_sale_id' => $afterSale->id,
                'name'  => '客户确认',
                'desc'  => $remarks,
            ]);
            return $afterSale;
        } else {
            throw new BizException('售后订单状态异常，请稍后再试');
        }
    }

    /**
     * 物流拒绝确认收货
     *
     * @param AfterSale $afterSale
     * @param string $remarks
     * @return void
     */
    public function shippingFail(AfterSale $afterSale, $remarks ='物流收货未通过')
    {
        if ($this->isWaitShipping($afterSale)) {
            $afterSale->update([
                'state' => $afterSale::STATE_VERIFY,
                'remarks' => $remarks,
            ]);
            AfterSaleLog::create([
                'after_sale_id' => $afterSale->id,
                'name'  => '仓库审核',
                'desc'  => $remarks,
            ]);
        } else {
            throw new BizException('该售后订单状态异常');
        }
    }

    /**
     * 物流确认收货
     *
     * @param AfterSale $afterSale
     * @param string $remarks
     * @return void
     */
    public function shipping(AfterSale $afterSale, $remarks ='物流确认收货')
    {
        if ($this->isWaitShipping($afterSale)) {
            $afterSale->update([
                'state' => $afterSale::STATE_FINANCE,
                'remarks' => $remarks,
            ]);
            AfterSaleLog::create([
                'after_sale_id' => $afterSale->id,
                'name'  => '仓库审核',
                'desc'  => $remarks,
            ]);
        } else {
            throw new BizException('该售后订单状态异常');
        }
    }

    /**
     * 财务确认退款
     *
     * @return void
     */
    public function finance(AfterSale $afterSale, $remarks ='退款成功')
    {
        if ($this->isWaitFinance($afterSale)) {
            if (in_array($afterSale->type, [AfterSale::TYPE_REFUND_AND_RETURN, AfterSale::TYPE_REFUND])) {
                //todo-执行实际退款操作；
            } elseif (in_array($afterSale->type, [AfterSale::TYPE_CHANGE])) {//换货流程
                //todo-执行生成新的订单，发货单操作；
            }

            AfterSaleLog::create([
                'after_sale_id' => $afterSale->id,
                'name'  => '财务审核',
                'desc'  => $remarks,
            ]);
            $afterSale->update([
                'state' => $afterSale::STATE_FINISH,
                'remarks' => $remarks,
            ]);
        } else {
            throw new BizException('该售后订单状态异常');
        }
    }
}