package service

import (
	"bytes"
	"encoding/json"
	"errors"
	"strconv"

	"github.com/xuri/excelize/v2"
	"gitstore.ru/tolikproh/sirius/internal/model"
)

func SiriusConv(data []byte) (*bytes.Buffer, error) {

	data = bytes.TrimPrefix(data, []byte("\xef\xbb\xbf"))

	if !json.Valid(data) {
		return nil, errors.New("formated data not json")
	}

	var sirius model.Sirius

	err := json.Unmarshal(data, &sirius)
	if err != nil {
		return nil, errors.New("Error unmarshal file")
	}

	return SaveToExel(sirius.NewBolid().ZoneInfo())

}

func SaveToExel(data []model.ZoneInfo) (*bytes.Buffer, error) {
	f := excelize.NewFile()
	defer f.Close()

	// Create a new sheet.
	f.SetCellValue("Sheet1", "A2", "№ зоны")
	f.SetCellValue("Sheet1", "B2", "Описание зоны")
	f.SetCellValue("Sheet1", "C2", "Адреса в зоне")
	i := 3
	for _, d := range data {
		f.SetCellValue("Sheet1", "A"+strconv.Itoa(i), d.ZoneNum)
		f.SetCellValue("Sheet1", "B"+strconv.Itoa(i), d.ZoneName)
		f.SetCellValue("Sheet1", "C"+strconv.Itoa(i), d.InputString())
		i++
	}

	return f.WriteToBuffer()
}