package backend

import (
	"bytes"
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"kpt-tmr-group/model"
	"kpt-tmr-group/pkg/logger/zaplog"
	"kpt-tmr-group/pkg/xerr"
	operationPb "kpt-tmr-group/proto/go/backend/operation"
	"net/http"
	"strconv"
	"sync"
	"time"

	"go.uber.org/multierr"

	"github.com/xuri/excelize/v2"
	"go.uber.org/zap"
	"gorm.io/gorm"
)

const EncodeNumberPrefix = "encode_number"

var PastureDataLogType = map[string]int32{
	"FeedFormula_Distribute": 1,
}

// CreateFeedFormula 添加数据
func (s *StoreEntry) CreateFeedFormula(ctx context.Context, req *operationPb.AddFeedFormulaRequest) error {
	forage := model.NewFeedFormula(req)
	if err := s.DB.Create(forage).Error; err != nil {
		return xerr.WithStack(err)
	}
	return nil
}

// EditFeedFormula 编辑数据
func (s *StoreEntry) EditFeedFormula(ctx context.Context, req *operationPb.AddFeedFormulaRequest) error {

	forage := model.FeedFormula{Id: int64(req.Id)}
	if err := s.DB.Where("is_delete = ?", operationPb.IsShow_OK).First(&forage).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return xerr.Custom("该数据不存在")
		}
		return xerr.WithStack(err)
	}

	updateData := &model.FeedFormula{
		Name:               req.Name,
		Colour:             req.Colour,
		CattleCategoryId:   req.CattleCategoryId,
		CattleCategoryName: req.CattleCategoryName,
		FormulaTypeId:      req.FormulaTypeId,
		FormulaTypeName:    req.FormulaTypeName,
		DataSourceId:       req.DataSourceId,
		DataSourceName:     req.DataSourceName,
		Remarks:            req.Remarks,
		IsShow:             req.IsShow,
	}

	if err := s.DB.Model(new(model.FeedFormula)).
		Omit("is_show", "is_delete", "encode_number", "formula_type_id", "formula_type_name", "data_source", "version", "is_modify").
		Where("id = ?", req.Id).
		Updates(updateData).Error; err != nil {
		return xerr.WithStack(err)
	}

	return nil
}

// SearchFeedFormulaList 查询数据列表
func (s *StoreEntry) SearchFeedFormulaList(ctx context.Context, req *operationPb.SearchFeedFormulaRequest) (*operationPb.SearchFeedFormulaListResponse, error) {
	feedFormula := make([]*model.FeedFormula, 0)
	var count int64 = 0

	pref := s.DB.Model(new(model.FeedFormula)).Where("is_delete = ?", operationPb.IsShow_OK)
	if req.Name != "" {
		pref.Where("name like ?", fmt.Sprintf("%s%s%s", "%", req.Name, "%"))
	}

	if req.CattleCategoryId > 0 {
		pref.Where("cattle_category_id = ?", req.CattleCategoryId)
	}

	if req.FormulaTypeId > 0 {
		pref.Where("formula_type_id = ?", req.FormulaTypeId)
	}

	if req.IsShow > 0 {
		pref.Where("is_show = ?", req.IsShow)
	}

	if req.DataSource > 0 {
		pref.Where("data_source = ?", req.DataSource)
	}

	if req.Remarks != "" {
		pref.Where("remarks = ?", req.Remarks)
	}

	if err := pref.Order("id desc").Count(&count).Limit(int(req.Pagination.PageSize)).Offset(int(req.Pagination.PageOffset)).
		Find(&feedFormula).Error; err != nil {
		return nil, xerr.WithStack(err)
	}

	return &operationPb.SearchFeedFormulaListResponse{
		Code: http.StatusOK,
		Msg:  "ok",
		Data: &operationPb.SearchFeedFormulaListData{
			Page:     req.Pagination.Page,
			PageSize: req.Pagination.PageSize,
			Total:    int32(count),
			List:     model.FeedFormulaSlice(feedFormula).ToPB(),
		},
	}, nil
}

// IsShowFeedFormula 是否启用和是否可修改
func (s *StoreEntry) IsShowFeedFormula(ctx context.Context, req *operationPb.IsShowModifyFeedFormula) error {
	feedFormula := &model.FeedFormula{Id: int64(req.FeedFormulaId)}
	if err := s.DB.First(feedFormula).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return xerr.Custom("该数据不存在")
		}
		return xerr.WithStack(err)
	}

	if req.EditType == 1 {
		if err := s.DB.Model(new(model.FeedFormula)).Where("id = ?", req.FeedFormulaId).Update("is_show", req.IsShow).Error; err != nil {
			return xerr.WithStack(err)
		}
	}

	if req.EditType == 2 {
		if err := s.DB.Model(new(model.FeedFormula)).Where("id = ?", req.FeedFormulaId).Update("is_modify", req.IsShow).Error; err != nil {
			return xerr.WithStack(err)
		}
	}
	return nil
}

// DeleteFeedFormula 是否删除
func (s *StoreEntry) DeleteFeedFormula(ctx context.Context, feedFormulaId int64) error {
	feedFormula := &model.FeedFormula{Id: feedFormulaId}
	if err := s.DB.First(feedFormula).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return xerr.Custom("该数据不存在")
		}
		return xerr.WithStack(err)
	}

	if err := s.DB.Model(new(model.FeedFormula)).Where("id = ?", feedFormula.Id).Update("is_delete", operationPb.IsShow_NO).Error; err != nil {
		return xerr.WithStack(err)
	}
	return nil
}

// ExcelImportFeedFormula 导入excel
func (s *StoreEntry) ExcelImportFeedFormula(ctx context.Context, req io.Reader) error {
	xlsx, err := excelize.OpenReader(req)
	if err != nil {
		return xerr.WithStack(err)
	}
	defer xlsx.Close()

	rows, err := xlsx.GetRows(xlsx.GetSheetName(xlsx.GetActiveSheetIndex()))
	if err != nil {
		return xerr.WithStack(err)
	}

	if len(rows) > 10000 {
		rows = rows[:10000]
	}
	feedFormulaList := make([]*model.FeedFormula, 0)
	for i, row := range rows {
		if i == 0 {
			continue
		}
		var (
			name, encodeNumber, cattleCategoryName, formulaTypeName, dataSourceName, remarks, isShowStr string
			isShow                                                                                      operationPb.IsShow_Kind
		)

		for k, v := range row {
			if k == 0 {
				name = v
			}
			if k == 1 {
				encodeNumber = v
			}
			if k == 2 {
				cattleCategoryName = v
			}
			if k == 3 {
				formulaTypeName = v
			}
			if k == 4 {
				dataSourceName = v
			}
			if k == 5 {
				remarks = v
			}
			if k == 6 {
				isShowStr = v
			}
		}

		if isShowStr == "是" {
			isShow = operationPb.IsShow_OK
		} else {
			isShow = operationPb.IsShow_NO
		}

		feedFormulaItem := &model.FeedFormula{
			Name:               name,
			EncodeNumber:       encodeNumber,
			CattleCategoryName: cattleCategoryName,
			FormulaTypeName:    formulaTypeName,
			Remarks:            remarks,
			IsShow:             isShow,
			IsDelete:           operationPb.IsShow_OK,
			DataSourceId:       operationPb.DataSource_EXCEL_IMPORT,
			DataSourceName:     dataSourceName,
		}
		feedFormulaList = append(feedFormulaList, feedFormulaItem)
	}

	if len(feedFormulaList) > 0 {
		if err = s.DB.Create(feedFormulaList).Error; err != nil {
			return xerr.WithStack(err)
		}
	}

	return nil
}

// ExcelExportFeedFormula 流式导出excel
func (s *StoreEntry) ExcelExportFeedFormula(ctx context.Context, req *operationPb.SearchFeedFormulaRequest) (*bytes.Buffer, error) {
	res, err := s.SearchFeedFormulaList(ctx, req)
	if err != nil {
		return nil, xerr.WithStack(err)
	}
	if len(res.Data.List) <= 0 {
		return nil, xerr.Custom("数据为空")
	}

	file := excelize.NewFile()
	defer file.Close()

	streamWriter, err := file.NewStreamWriter("Sheet1")
	if err != nil {
		return nil, xerr.WithStack(err)
	}
	titles := []interface{}{"配方名称", "配方编码", "畜牧类别", "配方类别", "来源", "备注", "是否启用",
		"饲料组", "饲料名称", "重量（kg）", "搅拌延迟（min）", "是否锁定牛头数比例", "顺序"}
	if err = streamWriter.SetRow("A1", titles); err != nil {
		return nil, xerr.WithStack(err)
	}
	for i, item := range res.Data.List {
		cell, err := excelize.CoordinatesToCellName(1, i+2)
		if err != nil {
			zaplog.Error("excelize.CoordinatesToCellName", zap.Any("Err", err))
			continue
		}
		row := make([]interface{}, 0)
		row = append(row, item.Name, item.EncodeNumber, item.CattleCategoryName, item.FormulaTypeName, item.DataSourceName,
			item.Remarks, item.IsShow)

		if err = streamWriter.SetRow(cell, row); err != nil {
			return nil, xerr.WithStack(err)
		}
	}

	if err = streamWriter.Flush(); err != nil {
		return nil, xerr.WithStack(err)
	}

	return file.WriteToBuffer()
}

// ExcelTemplateFeedFormula 导出模板
func (s *StoreEntry) ExcelTemplateFeedFormula(ctx context.Context) (*bytes.Buffer, error) {
	file := excelize.NewFile()
	defer file.Close()

	streamWriter, err := file.NewStreamWriter("Sheet1")
	if err != nil {
		return nil, xerr.WithStack(err)
	}
	titles := []interface{}{"配方名称", "配方编码", "畜牧类别", "配方类别", "来源", "备注", "是否启用",
		"饲料组", "饲料名称", "重量（kg）", "搅拌延迟（min）", "是否锁定牛头数比例", "顺序"}
	if err = streamWriter.SetRow("A1", titles); err != nil {
		return nil, xerr.WithStack(err)
	}
	if err = streamWriter.Flush(); err != nil {
		return nil, xerr.WithStack(err)
	}

	return file.WriteToBuffer()
}

// EncodeNumber 配方编码
func (s *StoreEntry) EncodeNumber(ctx context.Context) string {
	currTime := time.Now().Format(model.LayoutDate)
	prefix := fmt.Sprintf("%s_%s", EncodeNumberPrefix, currTime)
	data := &model.UniqueData{}
	if err := s.DB.Order("id desc").Where("prefix = ?", prefix).First(data).Error; err != nil {
		if !errors.Is(err, gorm.ErrRecordNotFound) {
			return ""
		}
		ud, _ := strconv.Atoi(currTime)
		result := ud*100 + 1
		newData := &model.UniqueData{
			Prefix: prefix,
			Data:   int64(result),
		}
		if err = s.DB.Create(newData).Error; err != nil {
			zaplog.Error("EncodeNumber Create", zap.Any("data", newData), zap.Any("Err", err))
			return ""
		}
		return fmt.Sprintf("%d", newData.Data)
	}

	data.Data += 1
	if err := s.DB.Model(new(model.UniqueData)).Where("prefix = ?", prefix).Update("data", data.Data).Error; err != nil {
		return ""
	} else {
		return fmt.Sprintf("%d", data.Data)
	}
}

// DistributeFeedFormula 配方下发牧场
func (s *StoreEntry) DistributeFeedFormula(ctx context.Context, req *operationPb.DistributeFeedFormulaRequest) error {
	distributeData, err := s.checkoutDistributeData(ctx, req)
	if err != nil {
		return xerr.WithStack(err)
	}
	if len(distributeData.PastureList) <= 0 {
		return nil
	}

	feedFormulaList := make([]*model.FeedFormula, 0)
	if err = s.DB.Where("id IN ?", req.FeedFormulaIds).Find(&feedFormulaList).Error; err != nil {
		return xerr.WithStack(err)
	}

	wg := sync.WaitGroup{}
	wg.Add(len(distributeData.PastureList))
	var muError error
	for _, pasture := range distributeData.PastureList {
		go func(p *model.GroupPasture) {
			response := &model.PastureResponse{}
			body := &model.DistributeFeedFormulaRequest{
				PastureId: p.Id,
				Body:      feedFormulaList,
			}
			if err = s.PastureHttpClient(ctx, FeedFormulaDistributeUrl, p.Id, body, response); err != nil {
				muError = multierr.Append(muError, err)
				zaplog.Error("DistributeFeedFormula", zap.Any("pasture", p), zap.Any("body", feedFormulaList), zap.Any("err", err), zap.Any("response", response))
				b, _ := json.Marshal(body)
				res, _ := json.Marshal(response)
				pastureDataLog := model.NewPastureDataLog(p.Id, PastureDataLogType["FeedFormula_Distribute"], FeedFormulaDistributeUrl, string(b), string(res))
				s.DB.Create(pastureDataLog)
			}
			if response.Code != http.StatusOK {
				muError = multierr.Append(muError, xerr.Custom(response.Msg))
			}

			wg.Done()
		}(pasture)
	}
	wg.Wait()
	return muError
}

func (s *StoreEntry) checkoutDistributeData(ctx context.Context, req *operationPb.DistributeFeedFormulaRequest) (*model.DistributeData, error) {
	result := &model.DistributeData{
		PastureList:     make([]*model.GroupPasture, 0),
		FeedFormulaList: make([]*model.FeedFormula, 0),
	}

	if err := s.DB.Where("id IN ?", req.PastureIds).Where("is_delete = ?", operationPb.IsShow_OK).Find(&result.PastureList).Error; err != nil {
		return result, xerr.WithStack(err)
	}

	if err := s.DB.Where("id IN ?", req.FeedFormulaIds).Find(&result.FeedFormulaList).Error; err != nil {
		return result, xerr.WithStack(err)
	}

	if len(result.PastureList) <= 0 || len(result.FeedFormulaList) <= 0 {
		return result, xerr.Customf("数据错误")
	}

	return result, nil
}