<?php

namespace App\Imports;
use App\Models\Config;
use App\Models\LoanStudentsList;
use Illuminate\Support\Collection;
use Illuminate\Database\Eloquent\Model;
use Maatwebsite\Excel\Concerns\ToModel;
use Maatwebsite\Excel\Concerns\ToCollection;
use Maatwebsite\Excel\Concerns\WithHeadingRow;
use Maatwebsite\Excel\Concerns\WithBatchInserts;
use Maatwebsite\Excel\Concerns\WithChunkReading;
use Maatwebsite\Excel\Imports\HeadingRowFormatter;
use Illuminate\Support\Facades\DB;

HeadingRowFormatter::
default('none');

class LoanFirstSheetImport implements ToCollection, WithBatchInserts, WithChunkReading, WithHeadingRow, ToModel
{
    private $round;

    public function __construct(int $round)
    {
        $this->round = $round;
    }


    /**
     * @param array $row
     *
     * @return Model|Model[]|null
     */
    public function model(array $row)
    {

        // // 数据库对应的字段
        return null;
    }

    public function collection(Collection $rows)
    {
        //导入的表格所有数据都在此处显示
        $list = $rows->toArray();
        if(empty($list)){
            throw new \Exception("请勿上传空文件");
        }

        //取出当前年份
        $config = Config::query()->where([
            "unique_identification" => "annual_session"
        ])->first();
        if(empty($config)){
            throw new \Exception("相关配置信息不能为空");
        }


        //入库
        $insertData = [];

        foreach($list as $key => $item){

            $arr = [
                "sfzh" => trim($item["身份证"]),
                "xh" => trim($item["学号"]),
                "xm" => trim($item["姓名"]),
                "fylx" => trim($item["费用类型"]),
                "total" => trim($item["贷款总金额"]),
                "is_five_year" => trim($item["五年一贯制"]),
                "create_time" => time(),
                "annual_session" => $config->data
            ];
            array_push($insertData, $arr);
        }

        DB::beginTransaction();
        try {

            $chunk_list = array_chunk($insertData, 1000);

            foreach ($chunk_list as $new_list) {
                $add = LoanStudentsList::query()->insert($new_list);
                if($add != count($new_list)){
                    throw new \Exception("导入数据失败,请重试");
                }
            }


            DB::commit();
        }catch (\PDOException $e){
            DB::rollBack();
            if ($e->getCode() === '23000') {
                // 唯一性约束错误处理逻辑
                $errorMessage = "导入表格中存在已入库学生贷款信息,请勿重复导入";
                // 可以根据需要进行相关处理
                throw new \Exception($errorMessage);
            } else {
                // 其他类型的错误处理逻辑
                throw new \Exception("导入数据失败,请重试");
            }
        }catch (\Exception $e){
            DB::rollBack();
            throw new \Exception("导入数据失败,请重试");
        }

    }


    //批量导入1000条
    public function batchSize(): int
    {
        return 1000;
    }

    //以1000条数据基准切割数据
    public function chunkSize(): int
    {
        return 1000;
    }
}