//go:build windows

package cafegame

import (
	"encoding/binary"
	"encoding/hex"
	"encoding/json"
	"errors"
	"fmt"
	"os"
	"path/filepath"
	"strconv"
	"strings"
)

// IsGameDirByYGX 云更新 id从40000开始
func IsGameDirByYGX(dir string) (bool, AppData, error) {
	info := AppData{}
	gamePatch := filepath.Join(dir, "gamepatch")
	ok, err := pathExists(gamePatch)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	gconfig := filepath.Join(gamePatch, "gconfig.ini")
	ok, err = pathExists(gconfig)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	id, _ := getIdByNumberIco(dir)
	if id < 40000 {
		return false, info, nil
	}
	info.AppId = id
	info.AppName = filepath.Base(dir)
	info.AppDir = dir
	info.AppSource = SourceYGX

	return true, info, nil
}

// IsGameDirByStory 蘑菇 id从8000开始
func IsGameDirByStory(dir string) (bool, AppData, error) {
	info := AppData{}
	gamePatch := filepath.Join(dir, "gamepatch")
	ok, err := pathExists(gamePatch)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}
	gconfig := filepath.Join(gamePatch, "gconfig.ini")
	ok, err = pathExists(gconfig)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	id, _ := getIdByNumberIco(dir)
	if id < 10000 {
		return false, info, nil
	}
	info.AppId = id
	info.AppName = filepath.Base(dir)
	info.AppDir = dir
	info.AppSource = SourceStory

	return true, info, nil
}

// IsGameDirByWWDS 网维大师 ID 从 10001 开始
func IsGameDirByWWDS(dir string) (bool, AppData, error) {
	info := AppData{}
	SunwardPkg := filepath.Join(dir, "SunwardPkg.idx")
	ok, err := pathExists(SunwardPkg)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	SunwardPkgCks := filepath.Join(dir, "SunwardPkg.cks")
	ok, err = pathExists(SunwardPkgCks)
	if err != nil {
		return false, info, err
	}
	if !ok {
		fmt.Printf("没有cks文件 dir:%s\n", dir)
		return false, info, nil
	}

	// 不能有这文件 这是盖伦文件
	GameIndex := filepath.Join(dir, "GameIndex.txt")
	ok, err = pathExists(GameIndex)
	if err != nil {
		return false, info, err
	}
	if ok {
		return false, info, nil
	}

	// 不能有这文件，这是易乐游文件
	GameInfodb := filepath.Join(dir, "GameInfodb.gz")
	ok, err = pathExists(GameInfodb)
	if err != nil {
		return false, info, err
	}
	if ok {
		return false, info, nil
	}

	// 不能有这文件 这是好司机文件
	hsjGame := filepath.Join(dir, "hsjGame.exe")
	ok, err = pathExists(hsjGame)
	if err != nil {
		return false, info, err
	}
	if ok {
		return false, info, nil
	}

	id, _ := getIdBySunwardPkg(dir)
	if id < 10000 {
		return false, info, nil
	}
	info.AppId = id
	info.AppName = filepath.Base(dir)
	info.AppDir = dir
	info.AppSource = SourceWWDS

	return true, info, nil
}

// IsGameDirByGoodGame 盖伦 id应该是从 1001开始 steam是第一个游戏 1011
func IsGameDirByGoodGame(dir string) (bool, AppData, error) {
	info := AppData{}
	GameIndex := filepath.Join(dir, "GameIndex.txt")
	ok, err := pathExists(GameIndex)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}
	GameCksum := filepath.Join(dir, "GameCksum.txt")
	ok, err = pathExists(GameCksum)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	id, _ := getIdBySunwardPkg(dir)
	if id < 1000 {
		return false, info, nil
	}
	info.AppId = id
	info.AppName = filepath.Base(dir)
	info.AppDir = dir
	info.AppSource = SourceGoodGame

	return true, info, nil
}

// IsGameDirByYLY 易乐游
func IsGameDirByYLY(dir string) (bool, AppData, error) {
	info := AppData{}
	GameInfodb := filepath.Join(dir, "GameInfodb.gz")
	ok, err := pathExists(GameInfodb)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}
	Gamever := filepath.Join(dir, "Gamever.ver")
	ok, err = pathExists(Gamever)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	// TODO: 没有游戏ID，只有GUID
	guid, _ := GetGuidByYLY(dir)
	if guid == "{00000000-0000-0000-0000-000000000000}" {
		return false, info, nil
	}
	info.AppId = 0
	info.AppName = filepath.Base(dir)
	info.AppDir = dir
	info.AppSource = SourceYLY
	info.AppGuid = guid

	return true, info, nil
}

// IsGameDirByHaoSiJi 好司机
func IsGameDirByHaoSiJi(dir string) (bool, AppData, error) {
	info := AppData{}
	hsjGame := filepath.Join(dir, "hsjGame.exe")
	ok, err := pathExists(hsjGame)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	hsjLoader := filepath.Join(dir, "hsjLoader.exe")
	ok, err = pathExists(hsjLoader)
	if !ok {
		return false, info, nil
	}
	if err != nil {
		return false, info, err
	}

	SunwardPkg := filepath.Join(dir, "SunwardPkg.idx")
	ok, err = pathExists(SunwardPkg)
	if !ok {
		return false, info, nil
	}
	if err != nil {
		return false, info, err
	}

	id, _ := getIdBySunwardPkg(dir)
	if id == 0 {
		return false, info, nil
	}

	guid, _ := GetGuidByYLY(dir)
	if guid == "{00000000-0000-0000-0000-000000000000}" {
		return false, info, nil
	}

	info.AppId = id
	info.AppName = filepath.Base(dir)
	info.AppDir = dir
	info.AppSource = SourceHaoSiJi
	info.AppGuid = guid
	return true, info, nil
}

// IsGameDirByMTGX 马蹄更新 id从10000开始
func IsGameDirByMTGX(dir string) (bool, AppData, error) {
	info := AppData{}
	patchdata := filepath.Join(dir, "patchdata")
	ok, err := pathExists(patchdata)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}
	config := filepath.Join(patchdata, "config.ini")
	ok, err = pathExists(config)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	ndstorrent := filepath.Join(dir, "ndstorrent.idx")
	ok, err = pathExists(ndstorrent)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	id, _ := getIdByNumberIco(dir)
	if id < 10000 {
		return false, info, nil
	}
	info.AppId = id
	info.AppName = filepath.Base(dir)
	info.AppDir = dir
	info.AppSource = SourceMTGX

	return true, info, nil
}

// IsGameDirByFast 火箭 id从8000开始
func IsGameDirByFast(dir string) (bool, AppData, error) {
	info := AppData{}
	patchdata := filepath.Join(dir, "patchdata")
	ok, err := pathExists(patchdata)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	rkttorrent := filepath.Join(dir, "rkttorrent.idx")
	ok, err = pathExists(rkttorrent)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	gconfig := filepath.Join(patchdata, "config.ini")
	ok, err = pathExists(gconfig)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	id, _ := getIdByNumberIco(dir)
	if id < 8000 {
		return false, info, nil
	}
	info.AppId = id
	info.AppName = filepath.Base(dir)
	info.AppDir = dir
	info.AppSource = SourceFast

	return true, info, nil
}

// IsGameDirByWfGame WF游戏
func IsGameDirByWfGame(dir string) (bool, AppData, error) {
	info := AppData{}
	ndsgameres := filepath.Join(dir, "ndsgameres.index")
	ok, err := pathExists(ndsgameres)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	dd_launcher := filepath.Join(dir, "dd_launcher.json")
	ok, err = pathExists(dd_launcher)
	if err != nil {
		return false, info, err
	}
	if !ok {
		return false, info, nil
	}

	id, _ := getIdByDdLauncher(dir)
	if id == 0 {
		return false, info, nil
	}
	info.AppId = id
	info.AppName = filepath.Base(dir)
	info.AppDir = dir
	info.AppSource = SourceWfGame

	return true, info, nil
}

// 网维大师 盖伦 好司机
func getIdBySunwardPkg(dir string) (int, error) {
	path := filepath.Join(dir, "SunwardPkg.idx")
	file, err := os.Open(path)
	if err != nil {
		fmt.Println("Error opening file:", err)
		return 0, err
	}
	defer file.Close()

	// Read a 4-byte integer
	var num int32
	err = binary.Read(file, binary.BigEndian, &num)
	if err != nil {
		fmt.Println("Error reading integer:", err)
		return 0, err
	}
	// fmt.Println("Read integer:", num)
	return int(num), nil
}

// 云更新 蘑菇 火箭使用
func getIdByNumberIco(dir string) (int, error) {
	// 获该目录下所有文件
	fileList, _ := getFileList(dir)
	for _, s := range fileList {
		ext := filepath.Ext(s)
		// 判断是否ico图标
		if strings.ToLower(ext) == ".ico" {
			// fmt.Printf("ico: %s\n", s)
			// 通过ico图标的数字确定游戏ID
			fileName := strings.TrimSuffix(filepath.Base(s), filepath.Ext(s))
			if IsAllNumberHandle(fileName) {
				gameId, _ := strconv.Atoi(fileName)
				if gameId >= 8000 {
					return gameId, nil
				}
			}
		} else {
			continue
		}
	}

	return 0, nil
}

// DdLauncherJson DDL Launcher 平台游戏信息（JSON 配置）
type DdLauncherJson struct {
	Gameid int `json:"gameid"`
}

// getIdByDdLauncher 从 DDL Launcher 配置文件中读取游戏 ID
func getIdByDdLauncher(dir string) (int, error) {
	path := filepath.Join(dir, "dd_launcher.json")

	ok, err := pathExists(path)

	if err != nil {
		return 0, err
	}
	if !ok {
		return 0, errors.New("文件不存在")
	}

	buf, err := os.ReadFile(path)
	if err != nil {
		fmt.Println(err)
		return 0, err
	}

	data := DdLauncherJson{}
	err = json.Unmarshal(buf, &data)
	if err != nil {
		fmt.Println(err)
		return 0, err
	}

	if data.Gameid == 0 {
		return 0, errors.New("游戏ID为空")
	}

	return data.Gameid, nil
}

// GetGuidByYLY 从易乐游目录配置中读取游戏 GUID
func GetGuidByYLY(dir string) (string, error) {
	path := filepath.Join(dir, "$ResMetadata$", "ResAppData.dat")

	ok, err := pathExists(path)

	if err != nil {
		return "", err
	}
	if !ok {
		return "", errors.New("文件不存在")
	}

	file, err := os.Open(path)
	if err != nil {
		fmt.Println(err)
		return "", err
	}
	defer file.Close()
	// 设置读取起始位置为第25个字节
	_, err = file.Seek(24, 0)
	if err != nil {
		fmt.Println(err)
		return "", err
	}
	// 创建一个字节切片来存储GUID
	buf := make([]byte, 16)
	// 读取GUID到字节切片中
	_, err = file.Read(buf)
	if err != nil {
		fmt.Println(err)
		return "", err
	}
	guidInt32 := binary.LittleEndian.Uint32(buf[:4])
	guidInt16_1 := binary.LittleEndian.Uint16(buf[4:6])
	guidInt16_2 := binary.LittleEndian.Uint16(buf[6:8])
	guidBytes_1 := buf[8:10]
	guidBytes_2 := buf[10:]
	guid := fmt.Sprintf("{%08x-%04x-%04x-%s-%s}", guidInt32, guidInt16_1, guidInt16_2, hex.EncodeToString(guidBytes_1), hex.EncodeToString(guidBytes_2))
	guid = strings.ToTitle(guid)
	return guid, err
}

// GetGameInfoByDir 获取游戏信息 从目录获取
func GetGameInfoByDir(root string) (AppData, error) {
	// fmt.Println(root)
	data := AppData{}

	// 云更新
	ok, data, err := IsGameDirByYGX(root)
	if ok {
		return data, err
	}

	// 网维大师
	ok, data, err = IsGameDirByWWDS(root)
	if ok {
		return data, err
	}

	// 易乐游
	ok, data, err = IsGameDirByYLY(root)
	if ok {
		return data, err
	}

	// 马蹄更新
	ok, data, err = IsGameDirByMTGX(root)
	if ok {
		return data, err
	}

	// 蘑菇
	ok, data, err = IsGameDirByStory(root)
	if ok {
		return data, err
	}

	// 盖伦
	ok, data, err = IsGameDirByGoodGame(root)
	if ok {
		return data, err
	}

	// 好司机
	ok, data, err = IsGameDirByHaoSiJi(root)
	if ok {
		return data, err
	}

	// 火箭
	ok, data, err = IsGameDirByFast(root)
	if ok {
		return data, err
	}

	// WF游戏
	ok, data, err = IsGameDirByWfGame(root)
	if ok {
		return data, err
	}

	return data, nil

}

// GetGameInfoByPath 获取游戏信息 从路径获取
func GetGameInfoByPath(exePath string) (AppData, error) {

	path := filepath.ToSlash(exePath)
	pathArr := strings.Split(path, "/")
	// 3个/ 比如 D:/网络游戏/英雄联盟/xxx.exe

	// 长度3 是 D:/英雄联盟/xxx.exe
	if len(pathArr) < 3 {
		return AppData{}, errors.New("不支持1级目录")
	}

	dir := ""
	// 连接二级目录
	for i, s := range pathArr {

		// 最后是文件名，不检测
		if i >= len(pathArr)-1 {
			break
		}
		// 最多支持3级目录 如 D:/网络游戏/腾讯游戏/英雄联盟/xxx.exe
		if i > 4 {
			break
		}
		if i == 0 {
			dir = s
		} else {
			dir = filepath.Join(dir, string(filepath.Separator), s)
		}

		// 获取游戏信息
		info, err := GetGameInfoByDir(dir)
		if err != nil {
			return info, err
		}

		if info.AppId > 0 || info.AppGuid != "" {
			return info, nil
		}

	}

	return AppData{}, nil

}

// 获取文件列表
func getFileList(dir string) ([]string, error) {
	list := make([]string, 0)
	//fmt.Println(dir)
	f, err := os.Open(dir)
	if err != nil {
		fmt.Println(err)
	}
	files, err := f.Readdir(-1)
	f.Close()
	if err != nil {
		fmt.Println(err)
		return nil, err
	}

	for _, file := range files {
		if !file.IsDir() && file.Name() != "$RECYCLE.BIN" && file.Name() != "System Volume Information" {
			list = append(list, filepath.Join(dir, file.Name()))
		}
	}

	return list, nil
}

// IsAllNumberHandle /** 是否全部是数字 */
func IsAllNumberHandle(str string) bool {
	// 空串不认为是数字
	if str == "" {
		return false
	}
	anyReplaceList := []int32{'.', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0'}
	for strIndex, strInt := range str {
		if strIndex == 0 {
			if strInt == '-' {
				continue
			}
		}
		if IsHaveReplaceList(strInt, anyReplaceList) {
			continue
		}
		return false
	}
	return true
}

// IsHaveReplaceList 是否在过滤列表中
func IsHaveReplaceList(strInt int32, replaceList []int32) bool {
	for _, chStrInt := range replaceList {
		if chStrInt == strInt {
			return true
		}
	}
	return false
}

// pathExists 判断一个文件或文件夹是否存在
// 输入文件路径，根据返回的bool值来判断文件或文件夹是否存在
func pathExists(path string) (bool, error) {
	_, err := os.Stat(path)
	if err == nil {
		return true, nil
	}
	if os.IsNotExist(err) {
		return false, nil
	}
	return false, err
}