package attribute

import (
	"fmt"
	"math"
)

//基准倍数
const CARDINAL_NUMBER int = 10000

func NewFixedPoint(value float32) *FixedPoint {
	return &FixedPoint{
		rawValue: int(math.Round(float64(value * float32(CARDINAL_NUMBER)))),
	}
}

type FixedPoint struct {
	rawValue int
}

func (this *FixedPoint) Scalar() float32 {
	return float32(this.rawValue) * 0.0001
}

func (this *FixedPoint) ToInt() int {
	return this.rawValue / CARDINAL_NUMBER
}
func (this *FixedPoint) ToFloat() float32 {
	return this.Scalar()
}
func (this *FixedPoint) ToString() string {
	return fmt.Sprintf("%f", this.Scalar())
}

///+
func (this *FixedPoint) Add(y *FixedPoint) *FixedPoint {
	this.rawValue += y.rawValue
	return this
}

///-
func (this *FixedPoint) Reduce(y *FixedPoint) *FixedPoint {
	this.rawValue -= y.rawValue
	return this
}

///*
func (this *FixedPoint) Multiply(y *FixedPoint) *FixedPoint {
	this.rawValue = (this.rawValue * y.rawValue) / CARDINAL_NUMBER
	return this
}

/// /
func (this *FixedPoint) Divide(y *FixedPoint) *FixedPoint {
	this.rawValue = (this.rawValue * CARDINAL_NUMBER) / y.rawValue
	return this
}