/*
	real time subtitle translate for PotPlayer using google API
*/

// string GetTitle() 														-> get title for UI
// string GetVersion														-> get version for manage
// string GetDesc()															-> get detail information
// string GetLoginTitle()													-> get title for login dialog
// string GetLoginDesc()													-> get desc for login dialog
// string GetUserText()														-> get user text for login dialog
// string GetPasswordText()													-> get password text for login dialog
// string ServerLogin(string User, string Pass)								-> login
// string ServerLogout()													-> logout
// array<string> GetSrcLangs() 												-> get source language
// array<string> GetDstLangs() 												-> get target language
// string Translate(string Text, string &in SrcLang, string &in DstLang) 	-> do translate !!

string JsonParseOld(string json)
{
	JsonReader Reader;
	JsonValue Root;
	string ret = "";	
	
	if (Reader.parse(json, Root) && Root.isArray())
	{
		for (int i = 0, len = Root.size(); i < len; i++)
		{
			JsonValue child1 = Root[i];
			
			if (child1.isArray())
			{
				for (int j = 0, len = child1.size(); j < len; j++)
				{		
					JsonValue child2 = child1[j];
					
					if (child2.isArray())
					{
						JsonValue item = child2[0];
				
						if (!ret.empty()) ret = ret + "\n";
						if (item.isString()) ret = ret + item.asString();
					}
				}
				break;
			}
		}
	} 
	return ret;
}

string JsonParseNew(string json)
{
	JsonReader Reader;
	JsonValue Root;
	string ret = "";	
	
	if (Reader.parse(json, Root) && Root.isObject())
	{
		JsonValue data = Root["data"];
			
		if (data.isObject())
		{
			JsonValue translations = data["translations"];
			
			if (translations.isArray())
			{
				for (int j = 0, len = translations.size(); j < len; j++)
				{		
					JsonValue child1 = translations[j];
					
					if (child1.isObject())
					{
						JsonValue translatedText = child1["translatedText"];
				
						if (!ret.empty()) ret = ret + "\n";
						if (translatedText.isString()) ret = ret + translatedText.asString();
					}
				}
			}
		}
	} 
	return ret;
}

array<string> LangTable = 
{
	"af",
	"sq",
	"am",
	"ar",
	"hy",
	"az",
	"eu",
	"be",
	"bn",
	"bs",
	"bg",
	"my",
	"ca",
    "ceb",
    "ny",
    "zh",
    "zh-CN",
    "zh-TW",
    "co",
    "hr",
    "cs",
    "da",
    "nl",
    "en",
    "eo",
    "et",
    "tl",
    "fi",
    "fr",
    "fy",
    "gl",
    "ka",
    "de",
    "el",
    "gu",
    "ht",
    "ha",
    "haw",
    "iw",
    "hi",
    "hmn",
    "hu",
    "is",
    "ig",
    "id",
    "ga",
    "it",
    "ja",
    "jw",
    "kn",
    "kk",
    "km",
    "ko",
    "ku",
    "ky",
    "lo",
    "la",
    "lv",
    "lt",
    "lb",
    "mk",
    "ms",
    "mg",
    "ml",
    "mt",
    "mi",
    "mr",
    "mn",
    "my",
    "ne",
    "no",
    "ps",
    "fa",
    "pl",
    "pt",
    "pa",
    "ro",
    "romanji",
    "ru",
    "sm",
    "gd",
    "sr",
    "st",
    "sn",
    "sd",
    "si",
    "sk",
    "sl",
    "so",
    "es",
    "su",
    "sw",
    "sv",
    "tg",
    "ta",
    "te",
    "th",
    "tr",
    "uk",
    "ur",
    "uz",
    "vi",
    "cy",
    "xh",
    "yi",
    "yo",
    "zu",
};

string UserAgent = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36";

string GetTitle()
{
	return "{$CP949=구글 번역$}{$CP950=Google 翻譯$}{$CP0=Google translate$}";
}

string GetVersion()
{
	return "1";
}

string GetDesc()
{
	return "https://translate.google.com/";
}

string GetLoginTitle()
{
	return "Input google API key";
}

string GetLoginDesc()
{
	return "Input google API key";
}

string GetUserText()
{
	return "API key:";
}

string GetPasswordText()
{
	return "";
}

string api_key;

string ServerLogin(string User, string Pass)
{
	api_key = User;
	if (api_key.empty()) return "fail";
	return "200 ok";
}

void ServerLogout()
{
	api_key = "";
}

array<string> GetSrcLangs()
{
	array<string> ret = LangTable;
	
	ret.insertAt(0, ""); // empty is auto
	return ret;
}

array<string> GetDstLangs()
{
	array<string> ret = LangTable;
	
	return ret;
}

string Translate(string Text, string &in SrcLang, string &in DstLang)
{
//HostOpenConsole();	// for debug
	
	if (SrcLang.length() <= 0) SrcLang = "auto";
	SrcLang.MakeLower();
	
	string enc = HostUrlEncode(Text);
	
//	by new API	
	if (api_key.length() > 0)
	{
		string url = "https://translation.googleapis.com/language/translate/v2?target=" + DstLang + "&q=" + enc;
		if (!SrcLang.empty() && SrcLang != "auto") url = url + "&source=" + SrcLang;
		url = url + "&key=" + api_key;
		string text = HostUrlGetString(url, UserAgent);
		string ret = JsonParseNew(text);		
		if (ret.length() > 0)
		{
			SrcLang = "UTF8";
			DstLang = "UTF8";
			return ret;
		}	
	}
	
//	by old API
	string url = "https://translate.googleapis.com/translate_a/single?client=gtx&sl=" + SrcLang + "&tl=" + DstLang + "&dt=t&q=" + enc;
	string text = HostUrlGetString(url, UserAgent);
	string ret = JsonParseOld(text);
	if (ret.length() > 0)
	{
		SrcLang = "UTF8";
		DstLang = "UTF8";
		return ret;
	}	

	return ret;
}
