package utils

import (
	"fmt"
	"math"
	"testing"

	"github.com/badu/bus"
)

func Test_fastSqrt(t *testing.T) {
	// 测试用例
	testCases := []float64{2, 4, 10, 16, 25, 100, 1000, 0.5, 0.01, 1e-20}

	fmt.Println("测试卡马克快速平方根算法与标准库的对比：")
	fmt.Println("数值\t快速算法结果\t标准库结果\t绝对误差")
	fmt.Println("--------------------------------------------------------------")

	for _, x := range testCases {
		fastResult := fastSqrt(x)
		stdResult := math.Sqrt(x)
		error := math.Abs(fastResult - stdResult)

		fmt.Printf("%.10g\t%.10g\t\t%.10g\t\t%.2e\n",
			x, fastResult, stdResult, error)
	}

	// 测试整数版本
	fmt.Println("\n测试整数快速平方根算法：")
	fmt.Println("数值\t快速算法结果\t标准库转换结果")
	fmt.Println("--------------------------------------")

	for _, x := range []int{2, 4, 10, 16, 25, 100, 1000} {
		fastResult := fastSqrtInt(x)
		stdResult := int(math.Sqrt(float64(x)))

		fmt.Printf("%d\t%d\t\t%d\n", x, fastResult, stdResult)
	}
}
func BenchmarkMathSqrt(b *testing.B) {
	testValues := []float64{2, 4, 10, 16, 25, 100, 1000, 0.5, 0.01, 1e-20}
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		for _, x := range testValues {
			_ = math.Sqrt(x)
		}
	}
}

func BenchmarkFastSqrt(b *testing.B) {
	testValues := []float64{2, 4, 10, 16, 25, 100, 1000, 0.5, 0.01, 1e-20}
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		for _, x := range testValues {
			_ = fastSqrt(x)
		}
	}
}

func BenchmarkFastSqrtCarmack(b *testing.B) {
	testValues := []float64{2, 4, 10, 16, 25, 100, 1000, 0.5, 0.01, 1e-20}
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		for _, x := range testValues {
			_ = fastSqrtCarmack(x)
		}
	}
}

func BenchmarkMathSqrtInt(b *testing.B) {
	testValues := []int{2, 4, 10, 16, 25, 100, 1000, 10000, 100000}
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		for _, x := range testValues {
			_ = int(math.Sqrt(float64(x)))
		}
	}
}

func BenchmarkFastSqrtInt(b *testing.B) {
	testValues := []int{2, 4, 10, 16, 25, 100, 1000, 10000, 100000}
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		for _, x := range testValues {
			_ = fastSqrtInt(x)
		}
	}
}

func Test_event(b *testing.T) {

	tt := make(map[int]*bus.Listener[*Task], 3)
	topic := bus.NewTopic[*Task]() //直接注册到用户
	for i := 0; i < 1; i++ {
		t := topic.Sub(func(v *Task) { //注册里程碑
			fmt.Println(v.id)
			if v.cfunc != nil {
				v.cont = v.cfunc(v.cont) //增加计数
			}

			if v.cont > 0 { //如果计数达到,标记任务完成
				v.done = true
			}
			fmt.Println("当前任务计数", v.cont, "是否完成", v.done)
		})
		tt[i] = t
	}
	topic.Pub(&Task{id: 1, cfunc: func(t uint32) uint32 { //满足任务1后推定

		fmt.Println("当前任务计数", t)
		//实现自定义逻辑
		//增加用户计数
		//增加服务器总计数
		return t + 1

	}})
	topic.Pub(&Task{id: 2, done: true})
	for _, v := range tt {

		v.Cancel()
	}
	topic.Pub(&Task{id: 1}) //发送事件

}

// Various event types
const EventA = 0x01

type Task struct {
	id    uint32
	cfunc func(uint32) uint32
	cont  uint32
	done  bool
}

// Event type for testing purposes
type Event struct {
	Data  string
	type1 uint32
}

// Type returns the event type
func (ev Event) Type() uint32 {
	return ev.type1
}

// newEventA creates a new instance of an event
func newEventA(data string) Event {
	return Event{Data: data, type1: EventA}
}

// Various event types
const EventB1 = 0x02

func newEventB(data string) Event {
	return Event{Data: data, type1: EventB1}
}