package cast_test

import (
	"strings"
	"testing"
	"time"

	"apigo.cc/go/cast"
)

func TestGenerics(t *testing.T) {
	// Test If
	if cast.If(true, 1, 2) != 1 {
		t.Error("If int failed")
	}
	if cast.If(false, "A", "B") != "B" {
		t.Error("If string failed")
	}

	// Test In
	if !cast.In([]int{1, 2, 3}, 2) {
		t.Error("In int failed")
	}
	if cast.In([]string{"A", "B"}, "C") {
		t.Error("In string negative failed")
	}
}

func TestStructToJSON(t *testing.T) {
	type User struct {
		Name string
		Age  int
	}
	u := User{Name: "Tom", Age: 18}
	js := cast.MustToJSON(u)
	// 验证首字母小写逻辑
	if !strings.Contains(js, `"name":"Tom"`) || !strings.Contains(js, `"age":18`) {
		t.Errorf("Struct to JSON auto-lowercase failed: %s", js)
	}
}

func TestJSONToStruct(t *testing.T) {
	type User struct {
		Name string
		Age  int
	}
	data := `{"Name":"Tom","age":18}`
	var u User
	cast.UnmarshalJSON(data, &u)
	if u.Name != "Tom" || u.Age != 18 {
		t.Error("UnmarshalJSON to struct failed")
	}
}

func TestYAMLConversion(t *testing.T) {
	type Config struct {
		Port int
	}
	c := Config{Port: 8080}
	yamlStr := cast.MustToYAML(c)
	if !strings.Contains(yamlStr, "port: 8080") {
		t.Errorf("YAML conversion failed: %s", yamlStr)
	}
}

func TestSpecialJSON(t *testing.T) {
	// 关键测试：特殊 HTML 字符序列化不应被转义
	type Content struct {
		Text string `json:"text"`
	}
	c := Content{Text: "<a> & <b>"}

	// 标准 json.Marshal 会变成 "<a> \u0026 <b>"
	// 我们期望输出原始字符 "<a> & <b>"
	js := cast.MustToJSON(c)
	expected := `{"text":"<a> & <b>"}`
	if js != expected {
		t.Errorf("Special JSON failed.\nExpected: %s\nActual:   %s", expected, js)
	}

	// 漂亮打印测试
	jsP := cast.PrettyToJSON(c)
	if !strings.Contains(jsP, "&") || !strings.Contains(jsP, "\n") {
		t.Error("JSONP special content failed")
	}
}

func TestComplexJSONType(t *testing.T) {
	// 测试 map[interface{}]interface{} 这种标准库无法处理的类型
	data := map[interface{}]interface{}{
		"name": "Tom",
		123:    "numeric key",
		"sub": map[interface{}]interface{}{
			"ok": true,
		},
	}

	js := cast.MustToJSON(data)
	// 期望 123 被转为 "123" 且内容正确
	if !strings.Contains(js, `"123":"numeric key"`) || !strings.Contains(js, `"ok":true`) {
		t.Errorf("Complex JSON type failed: %s", js)
	}
}

func TestPointerHelpers(t *testing.T) {
	s := "hello"
	if *cast.Ptr(s) != s {
		t.Error("String Ptr failed")
	}

	i := 100
	if *cast.Ptr(i) != i {
		t.Error("Int Ptr failed")
	}

	if *cast.Ptr(true) != true || *cast.Ptr(false) != false {
		t.Error("Bool Ptr failed")
	}
}

func TestNameConversions(t *testing.T) {
	if cast.GetLowerName("UserName") != "userName" {
		t.Error("GetLowerName failed")
	}
	if cast.GetUpperName("userName") != "UserName" {
		t.Error("GetUpperName failed")
	}
}

func TestEmptyValues(t *testing.T) {
	if cast.Int(nil) != 0 {
		t.Error("Int(nil) failed")
	}
	if cast.String(nil) != "" {
		t.Error("String(nil) failed")
	}
	if cast.Bool(nil) != false {
		t.Error("Bool(nil) failed")
	}
}

// 新增：专门测试 Goja 引擎等导致数组变成 Map[any]any 的补丁逻辑
func TestGojaMapToArrayFallback(t *testing.T) {
	// 模拟由于 JS 引擎导致的 map[interface{}]interface{} 伪装数组
	// key 为 float64 或 int
	mockGojaArray := map[interface{}]interface{}{
		float64(0): "apple",
		int(1):     "banana",
		"2":        "cherry", // 字符串形式的数字也应该被正确转换
	}

	js := cast.MustToJSON(mockGojaArray)

	// 我们期望它被正确识别并转化为标准的 JSON 数组，且顺序不会乱
	expected := `["apple","banana","cherry"]`
	if js != expected {
		t.Errorf("Goja Map-to-Array fallback failed.\nExpected: %s\nActual:   %s", expected, js)
	}
}

// 新增：测试基础类型的转换与默认值
func TestTypeCasting(t *testing.T) {
	// 测试多种输入向 Int 转换
	if cast.Int(12.34) != 12 {
		t.Error("Float to Int failed")
	}
	if cast.Int("100") != 100 {
		t.Error("String to Int failed")
	}
	if cast.Int([]byte("200")) != 200 {
		t.Error("Bytes to Int failed")
	}
	if cast.Int(true) != 1 {
		t.Error("Bool to Int failed")
	}

	// 测试多种输入向 Bool 转换
	if !cast.Bool("T") || !cast.Bool("true") || !cast.Bool(1) || !cast.Bool(-1) {
		t.Error("Truthy to Bool failed")
	}
	if cast.Bool("false") || cast.Bool(0) || cast.Bool(nil) {
		t.Error("Falsy to Bool failed")
	}

	// 测试 Duration
	if cast.Duration("1s") != time.Second {
		t.Error("String to Duration failed")
	}
	if cast.Duration(2000) != 2000 {
		t.Error("Int to Duration failed")
	}
}

// 新增：测试结构体不可寻址时的安全性 (防止 CanSet panic)
func TestUnaddressableStruct(t *testing.T) {
	type Dummy struct {
		Name string
	}
	d := Dummy{Name: "Test"}

	// 传入值类型而不是指针。如果 makeJSONType 中遗漏了 CanSet，这里会直接 panic
	defer func() {
		if r := recover(); r != nil {
			t.Errorf("ToJSON with value struct panicked! Missing CanSet() check: %v", r)
		}
	}()

	res := cast.MustToJSON(d)
	if !strings.Contains(res, "\"name\"") {
		t.Errorf("Value struct ToJSON failed to lowercase key: %s", res)
	}
}