/*

Facebook plugin for Miranda Instant Messenger
_____________________________________________

Copyright © 2009-11 Michal Zelinka, 2011-13 Robert Pösel

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "common.h"

std::string utils::url::encode(const std::string &s)
{
	return (char*)mir_ptr<char>(mir_urlEncode(s.c_str()));
}

std::string utils::url::decode(std::string data)
{
	// TODO: Better and universal method?
	utils::text::replace_all(&data, "%2F", "/");
	utils::text::replace_all(&data, "%3F", "?");
	utils::text::replace_all(&data, "%3D", "=");
	utils::text::replace_all(&data, "%26", "&");

	return data;
}

std::string utils::time::unix_timestamp()
{
	time_t in = ::time(NULL);
	return utils::conversion::to_string((void*)&in, UTILS_CONV_TIME_T);
}

std::string utils::time::mili_timestamp()
{
	SYSTEMTIME st;
	std::string timestamp = utils::time::unix_timestamp();
	GetSystemTime(&st);
	timestamp.append(utils::conversion::to_string((void*)&st.wMilliseconds, UTILS_CONV_UNSIGNED_NUMBER));
	return timestamp;
}

DWORD utils::time::fix_timestamp(double mili_timestamp)
{
	// If it is really mili_timestamp
	if (mili_timestamp > 100000000000) {
		return (DWORD) (mili_timestamp / 1000);
	}
	return (DWORD) mili_timestamp;
}

DWORD utils::conversion::to_timestamp(std::string data)
{
	DWORD timestamp = NULL;
	if (!utils::conversion::from_string<DWORD>(timestamp, data, std::dec)) {
		timestamp = static_cast<DWORD>(::time(NULL));
	}
	return timestamp;
}

struct tm *utils::conversion::fbtime_to_timeinfo(double timestamp) {
	time_t time = utils::time::fix_timestamp(timestamp);
	return localtime(&time);
}

std::string utils::conversion::to_string(void* data, WORD type)
{
	std::stringstream out;

	switch (type)
	{
  	case UTILS_CONV_BOOLEAN:
		out << (data ? "true" : "false");

    case UTILS_CONV_TIME_T:
		out << (*(time_t*)data);
		break;

	case UTILS_CONV_SIGNED_NUMBER:
  		out << (*(signed int*)data);
		break;

	case UTILS_CONV_UNSIGNED_NUMBER:
		out << (*(unsigned int*)data);
		break;
	}

	return out.str();
}

void utils::text::replace_first(std::string* data, std::string from, std::string to)
{
	std::string::size_type position = data->find(from);
	if (position != std::string::npos)
	{
		data->replace(position, from.size(), to);
	}
}

void utils::text::replace_all(std::string* data, std::string from, std::string to)
{
	std::string::size_type position = 0;

	while ((position = data->find(from, position)) != std::string::npos)
	{
		data->replace(position, from.size(), to);
		position++;
	}
}

unsigned int utils::text::count_all(std::string* data, std::string term)
{
	unsigned int count = 0;
	std::string::size_type position = 0;

	while ((position = data->find(term, position)) != std::string::npos)
	{
		count++;
		position++;
	}

	return count;
}

void utils::text::append_ordinal(unsigned long value, std::string* data)
{
	if (value >= 128 && value <= 2047)
	{ // U+0080 .. U+07FF
		*data += (char)(192 + (value / 64));
		*data += (char)(128 + (value % 64));
	} 
	else if (value >= 2048 && value <= 65535)
	{ // U+0800 .. U+FFFF
		*data += (char)(224 + (value / 4096));
		*data += (char)(128 + ((value / 64) % 64));
		*data += (char)(128 + (value % 64));
	}
	else if (value <= 127)
	{ // U+0000 .. U+007F
		*data += (char)value;
	}
}

std::string utils::text::special_expressions_decode(std::string data)
{
	utils::text::replace_all(&data, "&amp;", "&");
	utils::text::replace_all(&data, "&quot;", "\"");
	utils::text::replace_all(&data, "&lt;", "<");
	utils::text::replace_all(&data, "&gt;", ">");

	utils::text::replace_all(&data, "&hearts;", "\xE2\x99\xA5"); // direct byte replacement
//	utils::text::replace_all(&data, "&hearts;", "\\u2665");      // indirect slashu replacement

	utils::text::replace_all(&data, "\\/", "/");
	utils::text::replace_all(&data, "\\\\", "\\");

	// TODO: Add more to comply general usage
	// http://www.utexas.edu/learn/html/spchar.html
	// http://www.webmonkey.com/reference/Special_Characters
	// http://www.degraeve.com/reference/specialcharacters.php
	// http://www.chami.com/tips/internet/050798i.html
	// http://www.w3schools.com/tags/ref_entities.asp
	// http://www.natural-innovations.com/wa/doc-charset.html
	// http://webdesign.about.com/library/bl_htmlcodes.htm

	std::string new_string = "";
	for (std::string::size_type i = 0; i < data.length(); i++)
	{
		if (data.at(i) == '&' && (i+1) < data.length() && data.at(i+1) == '#')
		{
			unsigned int udn;
			std::string::size_type comma = data.find(";", i);
			if (comma != std::string::npos) {
				bool hexa = false;
				if ((i+2) < data.length() && data.at(i+2) == 'x') {
					hexa = true;
					i += 3;
				} else {
					i += 2;
				}
				udn = strtol(data.substr(i, comma-i).c_str(), NULL, hexa ? 16 : 10);
				i = comma;
			}
			
			utils::text::append_ordinal(udn, &new_string);
			continue;
		}

		if (data.at(i) == -19 && (i+2) < data.length()) {
			std::string chs = data.substr(i, i+2).c_str();
			unsigned char a[4] = {0};
			memcpy(&a[1], chs.c_str(), 3);
			
			new_string += "\\u";
			utils::text::append_ordinal((unsigned long)a, &new_string);
			
			/*u = reinterpret_cast<unsigned char&>(data.at(i+1));
			utils::text::append_ordinal(u, &new_string);

			u = reinterpret_cast<unsigned char&>(data.at(i+2));
			utils::text::append_ordinal(u, &new_string);*/

			i += 2;
			continue;
		}

		new_string += data.at(i);
	}

	return new_string;
}

std::string utils::text::edit_html(std::string data)
{
	std::string::size_type end = 0;
	std::string::size_type start = 0;
	std::string new_string = "";
  
	while (end != std::string::npos)
	{
		end = data.find("<span class=\\\"text_exposed_hide", start);
		if (end != std::string::npos)
		{
			new_string += data.substr(start, end - start);
			start = data.find("<\\/span", end);
		} else {
			new_string += data.substr(start, data.length() - start);
		}
	}

	start = end = 0;
	data = new_string;
	new_string = "";

	while (end != std::string::npos)
	{
		end = data.find("<span class=\\\"uiTooltipText", start);
		if (end != std::string::npos)
		{
			new_string += data.substr(start, end - start);
			start = data.find("<\\/span", end);
		} else {
			new_string += data.substr(start, data.length() - start);
		}
	}

	// Remove "Translate" link
	start = end = 0;
	data = new_string;
	new_string = "";
	while (end != std::string::npos)
	{
		end = data.find("translate_story_link\\\">", start);
		if (end != std::string::npos)
		{
			new_string += data.substr(start, end - start);
			start = data.find("<\\/div", end);
		} else {
			new_string += data.substr(start, data.length() - start);
		}
	}

	// Append newline after attachement title
	start = new_string.find("class=\\\"uiAttachmentTitle", 0);
	if (start != std::string::npos)
	{
		data = new_string.substr(0, start);
		data = utils::text::trim(data);

		start = new_string.find(">", start);
		if (start != std::string::npos)
			new_string.insert(start+1, "\n\n");

		start = new_string.find("<\\/div>", start);
		if (start != std::string::npos)
			new_string.insert(start, "\n");
	}

	// Append newline between attachement link and description
	start = new_string.find("uiAttachmentDesc", 0);
	if (start != std::string::npos)
	{
		start = new_string.find(">", start);
		if (start != std::string::npos)
			new_string.insert(start+1, "\n");

		start = new_string.find("<\\/div>", start);
		if (start != std::string::npos)
			new_string.insert(start, "\n");
	}
  
	utils::text::replace_all(&new_string, "<br \\/>", "\n");
	utils::text::replace_all(&new_string, "\n\n\n", "\n\n");
	//utils::text::replace_all(&new_string, "\\t", "");
	//utils::text::replace_all(&new_string, "\\n", "");
	return new_string;
}


std::string utils::text::remove_html(std::string data)
{
	std::string new_string = "";

	for (std::string::size_type i = 0; i < data.length(); i++)
	{
		if (data.at(i) == '<' && data.at(i+1) != ' ')
		{
			i = data.find(">", i);
			if (i == std::string::npos)
				break;

			continue;
		}

		new_string += data.at(i);
	}

	return new_string;
}

std::string utils::text::slashu_to_utf8(std::string data)
{
	std::string new_string = "";

	for (std::string::size_type i = 0; i < data.length(); i++)
	{
		if (data.at(i) == '\\' && (i+1) < data.length() && data.at(i+1) == 'u')
		{
			unsigned int udn = strtol(data.substr(i + 2, 4).c_str(), NULL, 16);
			append_ordinal(udn, &new_string);
			i += 5;
			continue;
		}

		new_string += data.at(i);
	}

	return new_string;
}

std::string utils::text::trim(std::string data)
{
	std::string spaces = " \t\r\n"; // TODO: include "nbsp"?
	std::string::size_type begin = data.find_first_not_of(spaces);
	std::string::size_type end = data.find_last_not_of(spaces) + 1;

	return (begin != std::string::npos) ? data.substr(begin, end - begin) : "";
}

void utils::text::explode(std::string str, std::string separator, std::vector<std::string>* results)
{
	std::string::size_type pos;
	pos = str.find_first_of(separator);
	while (pos != std::string::npos) {
		if (pos > 0) {
			results->push_back(str.substr(0,pos));
		}
		str = str.substr(pos+1);
		pos = str.find_first_of(separator);
	}
	if (str.length() > 0) {
		results->push_back(str);
	}
}

std::string utils::text::source_get_value(std::string* data, unsigned int argument_count, ...)
{
	va_list arg;
	std::string ret;
	std::string::size_type start = 0, end = 0;
	
	va_start(arg, argument_count);
	
	for (unsigned int i = argument_count; i > 0; i--)
	{
		if (i == 1)
		{
			end = data->find(va_arg(arg, char*), start);
			if (start == std::string::npos || end == std::string::npos)
				break;
			ret = data->substr(start, end - start);
		} else {
			std::string term = va_arg(arg, char*);
			start = data->find(term, start);
			if (start == std::string::npos)
				break;
			start += term.length();
		}
	}
	
	va_end(arg);	
	return ret;
}

std::string utils::text::source_get_value2(std::string* data, const char *term, const char *endings)
{
	std::string::size_type start = 0, end = 0;
	std::string ret;

	start = data->find(term);
	if (start != std::string::npos) {
		start += strlen(term);

		end = data->find_first_of(endings, start);
		if (end != std::string::npos) {
			ret = data->substr(start, end - start);
		}
	}

	return ret;
}

int utils::number::random()
{
	srand(::time(NULL));
	return rand();
}

int utils::debug::log(std::string file_name, std::string text)
{
	char szFile[MAX_PATH];
	GetModuleFileNameA(g_hInstance, szFile, SIZEOF(szFile));
	std::string path = szFile;
	path = path.substr(0, path.rfind("\\"));
	path = path.substr(0, path.rfind("\\") + 1);
	path = path + file_name.c_str() + ".txt";

	SYSTEMTIME time;
	GetLocalTime(&time);

	std::ofstream out(path.c_str(), std::ios_base::out | std::ios_base::app | std::ios_base::ate);
	out << "[" << (time.wHour < 10 ? "0" : "") << time.wHour << ":" << (time.wMinute < 10 ? "0" : "") << time.wMinute << ":" << (time.wSecond < 10 ? "0" : "") << time.wSecond << "] " << text << std::endl;
	out.close();

	return EXIT_SUCCESS;
}

void __fastcall utils::mem::detract(char** str)
{
	utils::mem::detract((void**)str);
}

void __fastcall utils::mem::detract(void** p)
{
	utils::mem::detract((void*)(*p));
}

void __fastcall utils::mem::detract(void* p)
{
	mir_free(p);
}

void* __fastcall utils::mem::allocate(size_t size)
{
	return mir_calloc(size);
}

struct
{
	char *ext;
	int fmt;
}
static formats[] = {
	{ ".png",  PA_FORMAT_PNG  },
	{ ".jpg",  PA_FORMAT_JPEG },
	{ ".jpeg", PA_FORMAT_JPEG },
	{ ".ico",  PA_FORMAT_ICON },
	{ ".bmp",  PA_FORMAT_BMP  },
	{ ".gif",  PA_FORMAT_GIF  },
};

int ext_to_format(const std::string &ext)
{
	for(size_t i=0; i<SIZEOF(formats); i++)
	{
		if(ext == formats[i].ext)
			return formats[i].fmt;
	}
	
	return PA_FORMAT_UNKNOWN;
}