package stringx

import (
	"strings"
	"testing"
)

func TestCreateRandomString(t *testing.T) {
	s := CreateRandomString(16)
	if len(s) != 16 {
		t.Errorf("CreateRandomString(16) 长度 = %d, want 16", len(s))
	}
	for _, c := range s {
		if !strings.ContainsRune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890", c) {
			t.Errorf("字符 %q 不在允许字符集内", c)
		}
	}
	if s2 := CreateRandomString(16); s2 == s {
		t.Error("两次生成结果不应相同")
	}
}

func TestCreateRandomStringInt(t *testing.T) {
	s := CreateRandomStringInt(8)
	if len(s) != 8 {
		t.Errorf("长度 = %d, want 8", len(s))
	}
	for _, c := range s {
		if c < '0' || c > '9' {
			t.Errorf("字符 %q 应为数字", c)
		}
	}
}

func TestCreateRandomStringHex(t *testing.T) {
	s := CreateRandomStringHex(8)
	if len(s) != 8 {
		t.Errorf("长度 = %d, want 8", len(s))
	}
	for _, c := range s {
		if !strings.ContainsRune("ABCDEF1234567890", c) {
			t.Errorf("字符 %q 不在十六进制字符集内", c)
		}
	}
}

func TestGetBetweenStr(t *testing.T) {
	if got := GetBetweenStr("key=value&x=1", "key=", "&"); got != "value" {
		t.Errorf("GetBetweenStr = %q, want value", got)
	}
	if got := GetBetweenStr("abc", "x", "y"); got != "" {
		t.Errorf("起始不存在应返回空: %q", got)
	}
	if got := GetBetweenStr("a<..>b", "<..>", ""); got != "b" {
		t.Errorf("结束为空应返回到结尾: %q", got)
	}
}

func TestGetGUIDFormat(t *testing.T) {
	guid := GetGUID()
	if strings.Count(guid, "-") != 4 {
		t.Errorf("GetGUID 应为 8-4-4-4-12 格式: %q", guid)
	}
	if len(strings.ReplaceAll(guid, "-", "")) != 32 {
		t.Errorf("GetGUID 总长应为 32 位十六进制: %q", guid)
	}
	uuid := GetUUID()
	if strings.Contains(uuid, "-") {
		t.Errorf("GetUUID 不应含连字符: %q", uuid)
	}
}

func TestCheckMobile(t *testing.T) {
	if !CheckMobile("13812345678") {
		t.Error("合法手机号应通过")
	}
	if CheckMobile("12345678901") {
		t.Error("第二位为 2 应不通过")
	}
	if CheckMobile("1381234567") {
		t.Error("10 位应不通过")
	}
}

func TestCheckIdCard(t *testing.T) {
	if !CheckIdCard("110101199001011234") {
		t.Error("18 位数字应通过")
	}
	if !CheckIdCard("11010119900101123X") {
		t.Error("17 位数字 + X 应通过")
	}
	if CheckIdCard("abc") {
		t.Error("非法字符应不通过")
	}
}

func TestIsMatch(t *testing.T) {
	if !IsMatchGreed("hello.txt", "*.txt") {
		t.Error("IsMatchGreed(hello.txt, *.txt) 应为 true")
	}
	if IsMatchGreed("hello.txt", "*.jpg") {
		t.Error("IsMatchGreed(hello.txt, *.jpg) 应为 false")
	}
	if !IsMatchDynamic("hello.txt", "*.txt") {
		t.Error("IsMatchDynamic(hello.txt, *.txt) 应为 true")
	}
}

func TestCamel2Case(t *testing.T) {
	if got := Camel2Case("GetUserName"); got != "get_user_name" {
		t.Errorf("Camel2Case = %q, want get_user_name", got)
	}
	if got := Camel2Case("id"); got != "id" {
		t.Errorf("Camel2Case = %q, want id", got)
	}
}

func TestDeleteElement(t *testing.T) {
	s := []int{1, 2, 3, 4, 5}
	got := DeleteElement(s, 2)
	if len(got) != 4 || got[0] != 1 || got[1] != 2 || got[2] != 4 || got[3] != 5 {
		t.Errorf("DeleteElement = %v, want [1 2 4 5]", got)
	}
}

func TestBuffer(t *testing.T) {
	b := NewBuffer()
	b.Append("a").Append(1).Append(int64(2)).Append([]byte("b")).Append(uint64(3))
	if b.String() != "a12b3" {
		t.Errorf("Buffer = %q, want a12b3", b.String())
	}
}

func TestGetFirstLetter(t *testing.T) {
	if got := GetFirstLetter("中国"); got != "zg" {
		t.Errorf("GetFirstLetter(中国) = %q, want zg", got)
	}
	if got := GetFirstLetter("abc123"); got != "abc123" {
		t.Errorf("非中文字符应原样返回: %q", got)
	}
}