package biz

import (
	"context"
	"excel_export/data"
	"excel_export/export"
	"fmt"
	"time"
)

func NewOrderBiz(repo *data.OrderRepo, historyRepo *data.HistoryOrderRepo, opts *ExportOpts) *OrderBiz {
	biz := &OrderBiz{
		repo:        repo,
		historyRepo: historyRepo,
	}

	biz.opts = DefaultOpts
	if opts != nil {
		biz.opts = opts
	}
	return biz
}

type OrderBiz struct {
	repo        *data.OrderRepo
	historyRepo *data.HistoryOrderRepo
	baseExportBiz
}

func (e *OrderBiz) Export(begin, end time.Time) error {
	e.setFileArg(begin)
	file := export.NewExport(e.fileName, e.opts.ExcelMaxRow)

	if err := file.Open(); err != nil {
		return err
	}

	if err := file.Title(export.Orders{}.Title()); err != nil {
		return err
	}

	//导出历史订单数据
	if err := e.exportHistoryData(file, begin, end); err != nil {
		return err
	}

	//导出最近7天数据
	if err := e.exportData(file, begin, end); err != nil {
		return err
	}

	e.fileSize = file.Index()
	return nil
}

func (e *OrderBiz) exportHistoryData(export *export.Export, begin, end time.Time) error {
	var last string
	for true {
		//导出最近7天数据
		data, err := e.historyRepo.List(context.Background(), begin, end, e.opts.QueryLimit, last)
		if err != nil {
			return fmt.Errorf("获取导出数据错误：%w", err)
		}

		if err := export.Export(e.HistoryTransforms(data)); err != nil {
			return err
		}
		if len(data) < e.opts.QueryLimit {
			return nil
		}
		last = data[len(data)-1].OrderNumber
	}

	return nil
}

func (e *OrderBiz) exportData(export *export.Export, begin, end time.Time) error {
	var last string
	for true {
		//导出最近7天数据
		data, err := e.repo.List(context.Background(), begin, end, e.opts.QueryLimit, last)
		if err != nil {
			return fmt.Errorf("获取导出数据错误：%w", err)
		}

		if err := export.Export(e.Transforms(data)); err != nil {
			return err
		}
		if len(data) < e.opts.QueryLimit {
			return nil
		}
		last = data[len(data)-1].OrderNumber
	}

	return nil
}

func (e OrderBiz) Transforms(data []data.Order) export.Orders {
	result := make(export.Orders, len(data))
	for i, val := range data {
		result[i] = e.Transform(val)
	}
	return result
}

func (e OrderBiz) Transform(order data.Order) *export.Order {
	return &export.Order{
		OrderNumber:         order.OrderNumber,
		ResellerId:          order.ResellerId,
		ResellerName:        order.Reseller.Name,
		ResellerOrderNumber: order.ResellerOrderNumber,
		Amount:              order.Amount,
		Account:             order.Account,
		Quantity:            order.Quantity,
		Status:              order.Status,
		PayStatus:           order.PayStatus,
		CreateTime:          time.Unix(order.CreateTime, 0).Format("2006-01-02 15:04:05"),
		FinishTime:          time.Unix(order.FinishTime, 0).Format("2006-01-02 15:04:05"),
		OursProductId:       order.Item.OursProductId,
		OursProductTitle:    order.Item.OursProductTitle,
		Remark:              order.Remark.Remark,
	}
}

func (e OrderBiz) HistoryTransforms(data []data.HistoryOrder) export.Orders {
	result := make(export.Orders, len(data))
	for i, val := range data {
		result[i] = e.HistoryTransform(val)
	}
	return result
}

func (e OrderBiz) HistoryTransform(order data.HistoryOrder) *export.Order {
	return &export.Order{
		OrderNumber:         order.OrderNumber,
		ResellerId:          order.ResellerId,
		ResellerName:        order.Reseller.Name,
		ResellerOrderNumber: order.ResellerOrderNumber,
		Amount:              order.Amount,
		Account:             order.Account,
		Quantity:            order.Quantity,
		Status:              order.Status,
		PayStatus:           order.PayStatus,
		CreateTime:          order.CreateTime.Format("2006-01-02 15:04:05"),
		FinishTime:          order.FinishTime.Format("2006-01-02 15:04:05"),
		OursProductId:       order.Item.OursProductId,
		OursProductTitle:    order.Item.OursProductTitle,
		Remark:              order.Remark.Remark,
	}
}