package calculate

import (
	"electricity_bill_calc/model"
	"fmt"
	"github.com/shopspring/decimal"
	"sync/atomic"
)

func CheckMeterArea(report *model.ReportIndex, meters []*model.MeterDetail) (bool, error) {
	anyAreaOptions := report.BasisPooled == model.POOLING_MODE_AREA ||
		report.AdjustPooled == model.POOLING_MODE_AREA ||
		report.PublicPooled == model.POOLING_MODE_AREA ||
		report.LossPooled == model.POOLING_MODE_AREA

	if anyAreaOptions {
		var meterWithoutArea int32

		for _, m := range meters {
			if (m.MeterType == model.METER_INSTALLATION_TENEMENT || m.MeterType == model.METER_INSTALLATION_POOLING) &&
				m.Area.Decimal == decimal.Zero {
				atomic.AddInt32(&meterWithoutArea, 1)
			}
		}

		if meterWithoutArea != 0 {
			return false, fmt.Errorf("园区中有 %d 个表计没有设置面积，无法进行按面积摊薄。", meterWithoutArea)
		}

		return true, nil
	}

	return false, nil
}