package convertor

import (
	"fmt"
	"reflect"
	"strconv"
	"testing"

	"github.com/duke-git/lancet/v2/internal"
	"github.com/duke-git/lancet/v2/slice"
)

func TestToChar(t *testing.T) {
	assert := internal.NewAssert(t, "TestToChar")

	cases := []string{"", "abc", "1 2#3"}
	expected := [][]string{
		{""},
		{"a", "b", "c"},
		{"1", " ", "2", "#", "3"},
	}
	for i := 0; i < len(cases); i++ {
		assert.Equal(expected[i], ToChar(cases[i]))
	}
}

func TestToChannel(t *testing.T) {
	assert := internal.NewAssert(t, "TestToChannel")

	ch := ToChannel([]int{1, 2, 3})
	assert.Equal(1, <-ch)
	assert.Equal(2, <-ch)
	assert.Equal(3, <-ch)

	_, ok := <-ch
	assert.Equal(false, ok)
}

func TestToBool(t *testing.T) {
	assert := internal.NewAssert(t, "TestToBool")

	cases := []string{"1", "true", "True", "false", "False", "0", "123", "0.0", "abc"}
	expected := []bool{true, true, true, false, false, false, false, false, false}

	for i := 0; i < len(cases); i++ {
		actual, _ := ToBool(cases[i])
		assert.Equal(expected[i], actual)
	}
}

func TestToBytes(t *testing.T) {
	assert := internal.NewAssert(t, "TestToBytes")

	cases := []any{
		0,
		false,
		"1",
	}
	expected := [][]byte{
		{0, 0, 0, 0, 0, 0, 0, 0},
		{102, 97, 108, 115, 101},
		{49},
	}
	for i := 0; i < len(cases); i++ {
		actual, _ := ToBytes(cases[i])
		assert.Equal(expected[i], actual)
	}

	bytesData, err := ToBytes("abc")
	if err != nil {
		t.Error(err)
		t.Fail()
	}
	assert.Equal("abc", ToString(bytesData))
}

func TestToInt(t *testing.T) {
	assert := internal.NewAssert(t, "TestToInt")

	cases := []any{"123", "-123", 123,
		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
		float32(12.3), float64(12.3),
		"abc", false, "111111111111111111111111111111111111111"}

	expected := []int64{123, -123, 123, 123, 123, 123, 123, 123, 12, 12, 0, 0, 0}

	for i := 0; i < len(cases); i++ {
		actual, _ := ToInt(cases[i])
		assert.Equal(expected[i], actual)
	}
}

func TestToFloat(t *testing.T) {
	assert := internal.NewAssert(t, "TestToFloat")

	cases := []any{
		"", "-1", "-.11", "1.23e3", ".123e10", "abc",
		int(0), int8(1), int16(-1), int32(123), int64(123),
		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
		float64(12.3), float32(12.3),
	}
	expected := []float64{0, -1, -0.11, 1230, 0.123e10, 0,
		0, 1, -1, 123, 123, 123, 123, 123, 123, 123, 12.3, 12.300000190734863}

	for i := 0; i < len(cases); i++ {
		actual, _ := ToFloat(cases[i])
		assert.Equal(expected[i], actual)
	}
}

func TestToString(t *testing.T) {
	assert := internal.NewAssert(t, "TestToString")

	aMap := make(map[string]int)
	aMap["a"] = 1
	aMap["b"] = 2
	aMap["c"] = 3

	type TestStruct struct {
		Name string
	}
	aStruct := TestStruct{Name: "TestStruct"}

	cases := []any{
		"", nil,
		int(0), int8(1), int16(-1), int32(123), int64(123),
		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
		float64(12.3), float32(12.3),
		true, false,
		[]int{1, 2, 3}, aMap, aStruct, []byte{104, 101, 108, 108, 111}}

	expected := []string{
		"", "",
		"0", "1", "-1",
		"123", "123", "123", "123", "123", "123", "123",
		"12.3", "12.3",
		"true", "false",
		"[1,2,3]", "{\"a\":1,\"b\":2,\"c\":3}", "{\"Name\":\"TestStruct\"}", "hello",
	}

	for i := 0; i < len(cases); i++ {
		actual := ToString(cases[i])
		assert.Equal(expected[i], actual)
	}
}
func TestToJson(t *testing.T) {
	assert := internal.NewAssert(t, "TestToJson")

	var aMap = map[string]int{"a": 1, "b": 2, "c": 3}
	mapJsonStr, _ := ToJson(aMap)
	assert.Equal("{\"a\":1,\"b\":2,\"c\":3}", mapJsonStr)

	type TestStruct struct {
		Name string
	}
	aStruct := TestStruct{Name: "TestStruct"}
	structJsonStr, _ := ToJson(aStruct)
	assert.Equal("{\"Name\":\"TestStruct\"}", structJsonStr)
}

func TestToMap(t *testing.T) {
	assert := internal.NewAssert(t, "TestToMap")

	type Message struct {
		name string
		code int
	}
	messages := []Message{
		{name: "Hello", code: 100},
		{name: "Hi", code: 101},
	}
	result := ToMap(messages, func(msg Message) (int, string) {
		return msg.code, msg.name
	})
	expected := map[int]string{100: "Hello", 101: "Hi"}

	assert.Equal(expected, result)
}

func TestStructToMap(t *testing.T) {
	assert := internal.NewAssert(t, "TestStructToMap")

	t.Run("StructToMap", func(_ *testing.T) {
		type People struct {
			Name string `json:"name"`
			age  int
		}
		p := People{
			"test",
			100,
		}
		pm, _ := StructToMap(p)
		var expected = map[string]any{"name": "test"}
		assert.Equal(expected, pm)
	})

	t.Run("StructToMapWithJsonAttr", func(_ *testing.T) {
		type People struct {
			Name  string `json:"name,omitempty"` // json tag with attribute
			Phone string `json:"phone"`          // json tag without attribute
			Sex   string `json:"-"`              // ignore
			age   int    // no tag
		}
		p := People{
			Phone: "1111",
			Sex:   "male",
			age:   100,
		}
		pm, _ := StructToMap(p)
		var expected = map[string]any{"phone": "1111"}
		assert.Equal(expected, pm)
	})
}

func TestMapToSlice(t *testing.T) {
	assert := internal.NewAssert(t, "TestMapToSlice")

	aMap := map[string]int{"a": 1, "b": 2, "c": 3}
	result := MapToSlice(aMap, func(key string, value int) string {
		return key + ":" + strconv.Itoa(value)
	})

	assert.Equal(3, len(result))
	assert.Equal(true, slice.Contain(result, "a:1"))
	assert.Equal(true, slice.Contain(result, "b:2"))
	assert.Equal(true, slice.Contain(result, "c:3"))
}

func TestColorHexToRGB(t *testing.T) {
	colorHex := "#003366"
	r, g, b := ColorHexToRGB(colorHex)
	colorRGB := fmt.Sprintf("%d,%d,%d", r, g, b)
	expected := "0,51,102"

	assert := internal.NewAssert(t, "TestColorHexToRGB")
	assert.Equal(expected, colorRGB)
}

func TestColorRGBToHex(t *testing.T) {
	r := 0
	g := 51
	b := 102
	colorHex := ColorRGBToHex(r, g, b)
	expected := "#003366"

	assert := internal.NewAssert(t, "TestColorRGBToHex")
	assert.Equal(expected, colorHex)
}

func TestToPointer(t *testing.T) {
	assert := internal.NewAssert(t, "TestToPointer")
	result := ToPointer(123)

	assert.Equal(*result, 123)
}

func TestEncodeByte(t *testing.T) {
	assert := internal.NewAssert(t, "TestEncodeByte")

	byteData, _ := EncodeByte("abc")
	expected := []byte{6, 12, 0, 3, 97, 98, 99}

	assert.Equal(expected, byteData)
}

func TestDecodeByte(t *testing.T) {
	assert := internal.NewAssert(t, "TestDecodeByte")

	var obj string
	byteData := []byte{6, 12, 0, 3, 97, 98, 99}
	err := DecodeByte(byteData, &obj)
	assert.IsNil(err)
	assert.Equal("abc", obj)
}

func TestDeepClone(t *testing.T) {
	// assert := internal.NewAssert(t, "TestDeepClone")

	type Struct struct {
		Str   string
		Int   int
		Float float64
		Bool  bool
		Nil   interface{}
		// unexported string
	}

	cases := []interface{}{
		true,
		1,
		0.1,
		map[string]int{
			"a": 1,
			"b": 2,
		},
		&Struct{
			Str:   "test",
			Int:   1,
			Float: 0.1,
			Bool:  true,
			Nil:   nil,
			// unexported: "can't be cloned",
		},
	}

	for i, item := range cases {
		cloned := DeepClone(item)

		t.Log(cloned)
		if &cloned == &item {
			t.Fatalf("[TestDeepClone case #%d failed]: equal pointer", i)
		}

		if !reflect.DeepEqual(item, cloned) {
			t.Fatalf("[TestDeepClone case #%d failed] unequal objects", i)
		}
	}
}

func TestCopyProperties(t *testing.T) {
	assert := internal.NewAssert(t, "TestCopyProperties")

	type Address struct {
		Country string
		ZipCode string
	}

	type User struct {
		Name   string
		Age    int
		Role   string
		Addr   Address
		Hobbys []string
		salary int
	}

	type Employee struct {
		Name   string
		Age    int
		Role   string
		Addr   Address
		Hobbys []string
		salary int
	}

	user := User{Name: "user001", Age: 10, Role: "Admin", Addr: Address{Country: "CN", ZipCode: "001"}, Hobbys: []string{"a", "b"}, salary: 1000}

	employee1 := Employee{}

	err := CopyProperties(&employee1, &user)

	assert.IsNil(err)
	assert.Equal("user001", employee1.Name)
	assert.Equal("Admin", employee1.Role)
	assert.Equal("CN", employee1.Addr.Country)
	assert.Equal(0, employee1.salary)

	employee2 := Employee{Name: "employee001", Age: 20, Role: "User",
		Addr: Address{Country: "UK", ZipCode: "002"}, salary: 500}

	err = CopyProperties(&employee2, &user)

	assert.IsNil(err)
	assert.Equal("user001", employee2.Name)
	assert.Equal("Admin", employee2.Role)
	assert.Equal("CN", employee2.Addr.Country)
	assert.Equal(500, employee2.salary)
}