package service

import (
	"context"
	"encoding/csv"
	"fmt"
	"go-template/business/dto"
	"go-template/business/exception"
	"go-template/business/model"
	"go-template/business/util"
	"io"

	"gitea.ckfah.com/cjjy/gocommon/pkg/common"
	"gitea.ckfah.com/cjjy/gocommon/pkg/mq/rocketmq"
	"gitea.ckfah.com/cjjy/gocommon/pkg/net/engines"
	"github.com/google/uuid"

	"gitea.ckfah.com/cjjy/gocommon/pkg/cerror"
)

type reportService struct {
}

func NewReportService() *reportService {
	return new(reportService)
}

// 举报详情
func (rs *reportService) ReportInfo(context context.Context, params *dto.ReportInfoParams) (*dto.ReportInfoResult, cerror.Cerror) {
	reportInfo, err := reportDao.GetById(context, params.Id)
	if err != nil {
		return nil, err
	}
	if reportInfo == nil {
		return nil, exception.ReportListError("举报详情为空")
	}
	cityInfo, err := cityService.CityInfo(context, &dto.CityInfoParams{
		CityId: reportInfo.CityID,
	})
	if err != nil {
		return nil, err
	}
	opInfo, err := factoryService.GetOpWorkerDetailById(context, reportInfo.OpWorkerID)
	if err != nil {
		return nil, err
	}
	return &dto.ReportInfoResult{Infos: []interface{}{cityInfo, reportInfo, opInfo}}, nil
}

func (rs *reportService) ReportList(context context.Context, params *dto.ReportListParams) (*dto.ReportListResult, cerror.Cerror) {
	page := params.GetPaginator()
	count, err := reportDao.GetCountByUserId(context, params.UserId)
	if err != nil {
		return nil, err
	}
	if count == 0 {
		return &dto.ReportListResult{
			Items:        []model.ReportPeccancy{},
			PageResponse: page.GetPageResponse(count),
		}, nil
	}
	result, err := reportDao.GetByUserId(context, params.UserId, page)
	if err != nil {
		return nil, err
	}
	return &dto.ReportListResult{
		Items:        result,
		PageResponse: page.GetPageResponse(count),
	}, nil
}

func (rs *reportService) SendMQ(ctx context.Context, params *dto.SendMQParams) (interface{}, cerror.Cerror) {
	if params.Topic == "" {
		params.Topic = "test_topic"
	}
	if params.Message == "" {
		params.Message = "hello, go-template"
	}
	if err := rocketmq.GetProducer().Send(ctx, params.Topic, []byte(params.Message)); err != nil {
		return nil, exception.DefaultError(err)
	}
	return map[string]string{"result": "发送成功"}, nil
}

func (rs *reportService) getDownLoadFileHeader(ctx context.Context, column int) []string {
	header := make([]string, 0, column)
	for x := 0; x < column; x++ {
		header = append(header, fmt.Sprintf("header-%d", x))
	}
	return header
}

func (rs *reportService) getDownLoadResult(ctx context.Context, row, column int) [][]string {
	generateList := func(length int) []string {
		list := make([]string, 0, length)
		for x := 0; x < length; x++ {
			list = append(list, uuid.New().String())
		}
		return list
	}
	list := make([][]string, row)
	for index := range list {
		list[index] = generateList(column)
	}
	return list
}

func (rs *reportService) DownLoadXlsxFile(ctx context.Context, writer engines.ResponseWriter, params *dto.DownLoadXlsxFileParams) cerror.Cerror {
	// 生成数据！
	list := rs.getDownLoadResult(ctx, params.Row, params.Column)

	// 生成header
	header := rs.getDownLoadFileHeader(ctx, params.Column)

	// 写excel
	excel := common.NewWriter360Excel()

	// 写sheet
	for x := 0; x < params.Sheet; x++ {

		// 写sheet
		if err := excel.WriteSheet(fmt.Sprintf("demo数据-%d", x), header, func(r common.Row) (hasNext bool) {
			if r.RowIndex() > len(list)-1 { // 如果当前写的index 超过了数组的index的最大值 就return false
				return false
			}
			row := list[r.RowIndex()]
			for _, elem := range row {
				r.Write(elem)
			}
			// 由于row_index是先写后加，所以当你写到最后一个的时候
			return true
		}); err != nil {
			return exception.DefaultError(err)
		}
	}

	// 先写响应头
	util.ResponseFileV2(writer, "输出文件.xlsx")

	// 后写body，顺序必须是这个
	if err := excel.FlushWrite(writer); err != nil {
		return exception.DefaultError(err)
	}
	return nil
}

func (rs *reportService) DownLoadCsvFile(ctx context.Context, writer engines.ResponseWriter, params *dto.DownLoadCsvFileParams) cerror.Cerror {
	// 生成数据！
	list := rs.getDownLoadResult(ctx, params.Row, params.Column)
	// 生成header
	header := rs.getDownLoadFileHeader(ctx, params.Column)

	// 先写响应头
	util.ResponseFileV2(writer, "输出文件.csv")

	// 再写csv (csv只能写一个sheet)
	csvFile := csv.NewWriter(writer)

	// 写header
	if err := csvFile.Write(header); err != nil {
		return exception.DefaultError(err)
	}
	// 写body
	if err := csvFile.WriteAll(list); err != nil {
		return exception.DefaultError(err)
	}
	// 最后记得flush一下，因为csv使用了buffer的原因
	csvFile.Flush()
	return nil
}

func (rs *reportService) UploadXlsxFile(ctx context.Context, file io.Reader, params *dto.UploadXlsxFileParams) (*dto.UploadXlsxFileResponse, cerror.Cerror) {
	excel, err := common.NewReader360Excel(file)
	if err != nil {
		return nil, exception.DefaultError(err)
	}
	// 读取sheet中的内容，第一行是header
	content, err := excel.ReadSheet(params.SheetName)
	if err != nil {
		return nil, exception.DefaultError(err)
	}
	// 为空返回数据
	if content == nil || len(content) == 0 {
		return &dto.UploadXlsxFileResponse{
			Header: []string{},
		}, nil
	}

	// todo 处理业务

	// 响应
	return &dto.UploadXlsxFileResponse{
		Rows:    len(content),
		Columns: len(content[0]),
		Header:  content[0],
	}, nil
}