/**
* @file		test_io.cpp
* @brief	io 模块单元测试（Json）
*
*
* @version	1.0
* @author	CodeBuddy
* @date		26-09-03
*
* @note		
*/
#include <gtest/gtest.h>

#include "io/dl_json.h"
#include "io/dl_file.h"
#include "memory/dl_code_cvt.h"
#include "render/dl_factory.h"

TEST(JsonTest, ParseArray)
{
	auto j = dl::Json::ParseString("[1,2,3]");
	ASSERT_TRUE(j.is_array());
	ASSERT_EQ(j.size(), 3u);
	EXPECT_EQ(j[0], 1);
	EXPECT_EQ(j[1], 2);
	EXPECT_EQ(j[2], 3);
}

TEST(JsonTest, ParseObject)
{
	auto j = dl::Json::ParseString(R"({"a": 123, "b": "hello"})");
	ASSERT_TRUE(j.is_object());
	EXPECT_EQ(j["a"], 123);
	EXPECT_EQ(j["b"], "hello");
}

TEST(JsonTest, ParseNested)
{
	auto j = dl::Json::ParseString(R"({"outer": {"inner": [true, false, null]}})");
	ASSERT_TRUE(j.is_object());
	EXPECT_TRUE(j["outer"]["inner"][0]);
	EXPECT_FALSE(j["outer"]["inner"][1]);
	EXPECT_TRUE(j["outer"]["inner"][2].is_null());
}

TEST(JsonTest, Get)
{
	auto j = dl::Json::ParseString(R"({"key": 456})");
	int v = 0;
	EXPECT_TRUE(dl::Json::Get(j, "key", v));
	EXPECT_EQ(v, 456);
}

TEST(JsonTest, GetMissing)
{
	auto j = dl::Json::ParseString(R"({"key": 456})");
	int v = 0;
	EXPECT_FALSE(dl::Json::Get(j, "nokey", v));
}

TEST(JsonTest, ParseInvalid)
{
	auto j = dl::Json::ParseString("{invalid json");
	EXPECT_TRUE(j.is_null());
}

TEST(JsonTest, SaveFileDump)
{
	json j = dl::Json::ParseString(R"({"a": 1, "b": "hello"})");

	// Dump 成字符串
	std::string dump = dl::Json::Dump(j);
	EXPECT_NE(dump.find("\"a\""), std::string::npos);
	EXPECT_NE(dump.find("1"), std::string::npos);

	// SaveFile + ParseFile 往返
	std::string path = dl::g_factory->GetPathTemp() + "dl_json_save_test.json";
	ASSERT_TRUE(dl::Json::SaveFile(j, path));

	json j2 = dl::Json::ParseFile(path);
	EXPECT_EQ(j2["a"], 1);
	EXPECT_EQ(j2["b"], "hello");

	dl::File::Delete(path);
}

//------------------------------File------------------------------
TEST(FileTest, GetExtension)
{
	EXPECT_EQ(dl::File::GetExtension("a/b/c.txt"), "txt");
	EXPECT_EQ(dl::File::GetExtension("a/b/c.txt", true), ".txt");
	EXPECT_EQ(dl::File::GetExtension("a/b/c"), "");
}

TEST(FileTest, GetFileName)
{
	EXPECT_EQ(dl::File::GetFileName("a/b/c.txt"), "c.txt");
	EXPECT_EQ(dl::File::GetFileName("a/b/"), "");
}

TEST(FileTest, GetStem)
{
	EXPECT_EQ(dl::File::GetStem("a/b/c.txt"), "c");
}

TEST(FileTest, GetFilePath)
{
	EXPECT_EQ(dl::File::GetFilePath("a/b/c.txt"), "a/b/");
	EXPECT_EQ(dl::File::GetFilePath("a/b/"), "a/b/");
	EXPECT_EQ(dl::File::GetFilePath("c.txt"), "");
}

TEST(FileTest, GetFolderName)
{
	EXPECT_EQ(dl::File::GetFolderName("a/b/c.txt"), "b");
}

//------------------------------CodeCvt------------------------------
TEST(CodeCvtTest, Utf8Check)
{
	EXPECT_EQ(dl::CodeCvt::Utf8::Check("hello"), 1);   // ascii
	EXPECT_EQ(dl::CodeCvt::Utf8::Check("你好"), 2);    // utf-8
}

TEST(CodeCvtTest, Utf8Sub)
{
	std::string s = "你好世界";  // 每个字 3 字节，共 12 字节
	EXPECT_EQ(dl::CodeCvt::Utf8::Sub(s, 0), 0u);
	EXPECT_EQ(dl::CodeCvt::Utf8::Sub(s, 4), 3u);    // 截断到"你"（3 字节边界）
	EXPECT_EQ(dl::CodeCvt::Utf8::Sub(s, 12), 12u);  // 足够时返回全部
}

TEST(CodeCvtTest, WideCharRoundtrip)
{
	std::string u8 = "hello 你好";
	std::wstring wc = dl::CodeCvt::Utf8ToWideChar(u8);
	std::string back = dl::CodeCvt::WideCharToUtf8(wc);
	EXPECT_EQ(back, u8);
}

TEST(CodeCvtTest, Utf32Roundtrip)
{
	std::string u8 = "hello 你好";
	std::u32string u32 = dl::CodeCvt::Utf8ToUtf32(u8);
	std::string back = dl::CodeCvt::Utf32ToUtf8(u32);
	EXPECT_EQ(back, u8);
}

//------------------------------File 文件操作------------------------------
TEST(FileTest, CreateReadDelete)
{
	std::string dir = dl::g_factory->GetPathTemp() + "dl_file_test/";
	dl::File::Delete(dir, true);

	ASSERT_TRUE(dl::File::CreateFolder(dir));
	EXPECT_TRUE(dl::File::IsExist(dir));

	std::string file = dir + "a.txt";
	ASSERT_TRUE(dl::File::SaveString("hello", file));
	EXPECT_TRUE(dl::File::IsExist(file));
	EXPECT_FALSE(dl::File::IsExist(dir + "none.txt"));

	EXPECT_EQ(dl::File::GetString(file), "hello");

	EXPECT_TRUE(dl::File::Delete(file));
	EXPECT_FALSE(dl::File::IsExist(file));

	dl::File::Delete(dir, true);
}

TEST(FileTest, CopyRename)
{
	std::string dir = dl::g_factory->GetPathTemp() + "dl_file_test/";
	dl::File::Delete(dir, true);
	ASSERT_TRUE(dl::File::CreateFolder(dir));

	std::string src = dir + "src.txt";
	std::string dst = dir + "dst.txt";
	ASSERT_TRUE(dl::File::SaveString("data", src));

	EXPECT_TRUE(dl::File::Copy(src, dst));
	EXPECT_TRUE(dl::File::IsExist(dst));
	EXPECT_EQ(dl::File::GetString(dst), "data");

	std::string dst2 = dir + "dst2.txt";
	EXPECT_TRUE(dl::File::Rename(dst, dst2));
	EXPECT_TRUE(dl::File::IsExist(dst2));
	EXPECT_FALSE(dl::File::IsExist(dst));

	dl::File::Delete(dir, true);
}