package calculate

import (
	"electricity_bill_calc/model/calculate"
	"github.com/shopspring/decimal"
)

// 计算已经启用的商铺面积和
func TotalConsumptionCalculate(tenements []calculate.PrimaryTenementStatistics,
	summary calculate.Summary) decimal.Decimal {
	var areaMaters []calculate.Meter
	for _, t := range tenements {
		areaMaters = append(areaMaters, t.Meters...)
	}

	areaMaters = removeDuplicates(areaMaters)

	var areaTotal float64
	for _, m := range areaMaters {
		areaTotal += m.Detail.Area.Decimal.InexactFloat64()
	}

	areaTotal += summary.OverallArea.InexactFloat64()

	return decimal.NewFromFloat(areaTotal)

}

func removeDuplicates(meters []calculate.Meter) []calculate.Meter {
	result := make([]calculate.Meter, 0, len(meters))
	seen := make(map[string]bool)
	for _, meter := range meters {
		if !seen[meter.Code] {
			seen[meter.Code] = true
			result = append(result, meter)
		}
	}
	return result
}