package syncutils

import (
	"fmt"
	"strconv"
	"testing"
)

func TestSyncVar(t *testing.T) {
	syncSlice := NewSyncVar([]string{"aaa", "bbb", "ccc"}, false)

	syncSlice.ForWrite(func(s []string) []string {
		return append(s, "ddd")
	})

	syncSlice.ForRead(func(s []string) {
		for i, v := range s {
			fmt.Println("Index", strconv.Itoa(i)+":", v)
		}
		fmt.Println()
	})

	syncSlice.ForWrite(func(s []string) []string {
		for i, v := range s {
			if v == "ddd" {
				return append(s[:i], s[i+1:]...)
			}
		}

		return s
	})

	syncSlice.ForRead(func(s []string) {
		for i, v := range s {
			fmt.Println("Index", strconv.Itoa(i)+":", v)
		}
		fmt.Println()
	})

	rwSyncSlice := NewSyncVar([]string{"aaa", "bbb", "ccc"}, true)

	rwSyncSlice.ForWrite(func(s []string) []string {
		return append(s, "ddd")
	})

	rwSyncSlice.ForRead(func(s []string) {
		for i, v := range s {
			fmt.Println("Index", strconv.Itoa(i)+":", v)
		}
		fmt.Println()
	})

	rwSyncSlice.ForWrite(func(s []string) []string {
		for i, v := range s {
			if v == "ddd" {
				return append(s[:i], s[i+1:]...)
			}
		}

		return s
	})

	rwSyncSlice.ForRead(func(s []string) {
		for i, v := range s {
			fmt.Println("Index", strconv.Itoa(i)+":", v)
		}
		fmt.Println()
	})

	type Student struct {
		Name string
		Age  int
	}

	rwSyncStruct := NewSyncVar(&Student{
		Name: "test",
		Age:  10,
	}, true)

	rwSyncStruct.ForRead(func(v *Student) {
		fmt.Println("Name:", v.Name)
		fmt.Println("Age:", v.Age)
		fmt.Println()
	})

	rwSyncStruct.ForWrite(func(v *Student) *Student {
		v.Name = "test_new"
		v.Age = 20
		return v
	})

	rwSyncStruct.ForRead(func(v *Student) {
		fmt.Println("Name:", v.Name)
		fmt.Println("Age:", v.Age)
		fmt.Println()
	})
}