<?php

namespace App\Http\Controllers\V1\Admin;

use App\Exceptions\ApiException;
use App\Http\Controllers\Controller;
use App\Http\Requests\Admin\CouponGenerate;
use App\Http\Requests\Admin\CouponSave;
use App\Models\Coupon;
use App\Utils\Helper;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class CouponController extends Controller
{
    public function fetch(Request $request)
    {
        $current = $request->input('current') ? $request->input('current') : 1;
        $pageSize = $request->input('pageSize') >= 10 ? $request->input('pageSize') : 10;
        $sortType = in_array($request->input('sort_type'), ['ASC', 'DESC']) ? $request->input('sort_type') : 'DESC';
        $sort = $request->input('sort') ? $request->input('sort') : 'id';
        $builder = Coupon::orderBy($sort, $sortType);
        $total = $builder->count();
        $coupons = $builder->forPage($current, $pageSize)
            ->get();
        return response([
            'data' => $coupons,
            'total' => $total
        ]);
    }

    public function show(Request $request)
    {
        $request->validate([
            'id' => 'required|numeric'
        ],[
            'id.required' => '优惠券ID不能为空',
            'id.numeric' => '优惠券ID必须为数字'
        ]);
        $coupon = Coupon::find($request->input('id'));
        if (!$coupon) {
            return $this->fail([400202,'优惠券不存在']);
        }
        $coupon->show = !$coupon->show;
        if (!$coupon->save()) {
            return $this->fail([500,'保存失败']);
        }
        return $this->success(true);
    }

    public function generate(CouponGenerate $request)
    {
        if ($request->input('generate_count')) {
            $this->multiGenerate($request);
            return;
        }

        $params = $request->validated();
        if (!$request->input('id')) {
            if (!isset($params['code'])) {
                $params['code'] = Helper::randomChar(8);
            }
            if (!Coupon::create($params)) {
                return $this->fail([500,'创建失败']);
            }
        } else {
            try {
                Coupon::find($request->input('id'))->update($params);
            } catch (\Exception $e) {
                \Log::error($e);
                return $this->fail([500,'保存失败']);
            }
        }

        return $this->success(true);
    }

    private function multiGenerate(CouponGenerate $request)
    {
        $coupons = [];
        $coupon = $request->validated();
        $coupon['created_at'] = $coupon['updated_at'] = time();
        $coupon['show'] = 1;
        unset($coupon['generate_count']);
        for ($i = 0;$i < $request->input('generate_count');$i++) {
            $coupon['code'] = Helper::randomChar(8);
            array_push($coupons, $coupon);
        }
        try{
            DB::beginTransaction();
            if (!Coupon::insert(array_map(function ($item) use ($coupon) {
                // format data
                if (isset($item['limit_plan_ids']) && is_array($item['limit_plan_ids'])) {
                    $item['limit_plan_ids'] = json_encode($coupon['limit_plan_ids']);
                }
                if (isset($item['limit_period']) && is_array($item['limit_period'])) {
                    $item['limit_period'] = json_encode($coupon['limit_period']);
                }
                return $item;
            }, $coupons))) {
                throw new \Exception();
            }
            DB::commit();
        }catch(\Exception $e){
            DB::rollBack();
            return $this->fail([500, '生成失败']);
        }
        
        $data = "名称,类型,金额或比例,开始时间,结束时间,可用次数,可用于订阅,券码,生成时间\r\n";
        foreach($coupons as $coupon) {
            $type = ['', '金额', '比例'][$coupon['type']];
            $value = ['', ($coupon['value'] / 100),$coupon['value']][$coupon['type']];
            $startTime = date('Y-m-d H:i:s', $coupon['started_at']);
            $endTime = date('Y-m-d H:i:s', $coupon['ended_at']);
            $limitUse = $coupon['limit_use'] ?? '不限制';
            $createTime = date('Y-m-d H:i:s', $coupon['created_at']);
            $limitPlanIds = isset($coupon['limit_plan_ids']) ? implode("/", $coupon['limit_plan_ids']) : '不限制';
            $data .= "{$coupon['name']},{$type},{$value},{$startTime},{$endTime},{$limitUse},{$limitPlanIds},{$coupon['code']},{$createTime}\r\n";
        }
        echo $data;
    }

    public function drop(Request $request)
    {
        $request->validate([
            'id' => 'required|numeric'
        ],[
            'id.required' => '优惠券ID不能为空',
            'id.numeric' => '优惠券ID必须为数字'
        ]);
        $coupon = Coupon::find($request->input('id'));
        if (!$coupon) {
            return $this->fail([400202,'优惠券不存在']);
        }
        if (!$coupon->delete()) {
            return $this->fail([500,'删除失败']);
        }

        return $this->success(true);
    }
}