package templatefunc

import (
	"html/template"
	"strconv"
)

func BaseTemplateFunc() template.FuncMap {
	addInt := func(arg1, arg2 int) int {
		return arg1 + arg2
	}
	addFloat := func(arg1, arg2 float64) float64 {
		return arg1 + arg2
	}
	minusInt := func(arg1, arg2 int) int {
		return arg1 - arg2
	}
	minusFloat := func(arg1, arg2 float64) float64 {
		return arg1 - arg2
	}

	return template.FuncMap{
		"addInt":     addInt,
		"addFloat":   addFloat,
		"minusInt":   minusInt,
		"minusFloat": minusFloat,
		"discalc":    DiscountCalculation,
	}
}

// DiscountCalculation 折扣计算，float64
// arg1 原件
// arg2 现价
func DiscountCalculation(arg1, arg2 float64) string {
	f := 1.0 - (arg2)/arg1
	return strconv.FormatFloat(f*100, 'f', 0, 64)
}