package business

import (
	"context"
	"strconv"

	"kra/internal/biz/business"
	"kra/internal/service/dto"
)

func (s *AnalyticsService) Export(ctx context.Context, req *dto.AnalyticsQuery) ([]byte, error) {
	f, err := analyticsRequest(req)
	if err != nil {
		return nil, err
	}
	page, err := s.uc.ListAll(ctx, business.ChannelAnalytics, f)
	if err != nil {
		return nil, err
	}
	if !page.Available {
		return nil, business.ErrChannelReportsUnavailable
	}
	headers := []string{"所属平台", "渠道名称", "归属商务", "渠道类型", "新增注册", "活跃玩家", "充值额", "付费玩家", "新增付费", "付费率"}
	rows := make([][]ledgerCell, 0, len(page.Rows)+1)
	appendRow := func(row *business.AnalyticsRow, summary bool) {
		platform, name, owner, kind := business.PlatformName(row.SourceDB), row.Name, row.BusinessName(), "—"
		if row.PromoteType != nil {
			if *row.PromoteType == 1 {
				kind = "公会"
			} else if *row.PromoteType == 0 {
				kind = "个人"
			}
		}
		if summary {
			platform, name, owner, kind = "全部", "合计（有效端 "+strconv.FormatInt(page.EffectiveCount, 10)+"）", "—", "—"
		}
		rows = append(rows, []ledgerCell{textCell(platform), textCell(name), textCell(owner), textCell(kind), numericCell(strconv.FormatInt(row.Counts.Register, 10)), numericCell(strconv.FormatInt(row.Counts.Active, 10)), numericCell(row.Pay), numericCell(strconv.FormatInt(row.Counts.Pay, 10)), numericCell(strconv.FormatInt(row.Counts.NewPay, 10)), textCell(row.PayRate + "%")})
	}
	for _, row := range page.Rows {
		appendRow(row, false)
	}
	if page.Summary != nil {
		appendRow(page.Summary, true)
	}
	return ledgerWorkbook("渠道数据统计", headers, rows)
}