#include "inspircd.h"

class ModuleFlipText : public Module
{
public:
	std::map<char, std::string> flipmap;

	virtual Version GetVersion()
	{
		return Version("Provides a /fliptext command - Syntax: FLIPTEXT [#channel|nick] :message", VF_VENDOR);
	}

	void init()
	{
		Implementation eventlist[] = { I_OnPreCommand };
		ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));

		flipmap['!'] = "¡";  // INVERTED EXCLAMATION MARK                x00A1
		flipmap['"'] = "„";  // DOUBLE LOW-9 QUOTATION MARK              x201E
		flipmap['&'] = "⅋";  // TURNED AMPERSAND                         x214B
		flipmap['\''] = ","; // COMMA                                    x002C
		flipmap['('] = ")";  // RIGHT PARENTHESIS                        x0029
		flipmap[')'] = "(";  // LEFT PARENTHESIS                         x0028
		flipmap['.'] = "˙";  // DOT ABOVE                                x02D9
		flipmap['3'] = "Ɛ";  // LATIN CAPITAL LETTER OPEN E              x0190
		flipmap['4'] = "ᔭ";  // CANADIAN SYLLABICS YA                    x152D
		flipmap['6'] = "9";  // DIGIT NINE                               x0039
		flipmap['7'] = "Ɫ";  // LATIN CAPITAL LETTER L WITH MIDDLE TILDE x2C62
		flipmap[';'] = "؛";  // ARABIC SEMICOLON                         x061B
		flipmap['<'] = ">";  // GREATER-THAN SIGN                        x003E
		flipmap['?'] = "¿";  // INVERTED QUESTION MARK                   x00BF
		flipmap['A'] = "∀";  // FOR ALL                                  x2200
		flipmap['B'] = "q";  // DESERET CAPITAL LETTER BEE               x10412  - needs fix
		flipmap['C'] = "Ↄ";  // ROMAN NUMERAL REVERSED ONE HUNDRED       x2183
		flipmap['D'] = "◖";  // LEFT HALF BLACK CIRCLE                   x25D6
		flipmap['E'] = "Ǝ";  // LATIN CAPITAL LETTER REVERSED E          x018E
		flipmap['F'] = "Ⅎ";  // TURNED CAPITAL F                         x2132
		flipmap['G'] = "⅁";  // TURNED SANS-SERIF CAPITAL G              x2141
		flipmap['J'] = "ſ";  // LATIN SMALL LETTER LONG S                x017F
		flipmap['K'] = "⋊ "; // RIGHT NORMAL FACTOR SEMIDIRECT PRODUCT   x22CA - improve?
		flipmap['L'] = "⅂";  // TURNED SANS-SERIF CAPITAL L              x2142
		flipmap['M'] = "W";  // LATIN CAPITAL LETTER W                   x0057
		flipmap['N'] = "N";  // LATIN LETTER CAPITAL N                   x004E
		flipmap['P'] = "Ԁ";  // CYRILLIC CAPITAL LETTER KOMI DE          x0500
		flipmap['Q'] = "Ό";  // GREEK CAPITAL LETTER OMICRON WITH TONOS  x038C
		flipmap['R'] = "ᴚ";  // LATIN LETTER SMALL CAPITAL TURNED R      x1D1A
		flipmap['T'] = "⊥";  // UP TACK                                  x22A5
		flipmap['U'] = "∩";  // INTERSECTION                             x2229
		flipmap['V'] = "ᴧ";  // GREEK LETTER SMALL CAPITAL LAMDA         x1D27
		flipmap['Y'] = "⅄";  // TURNED SANS-SERIF CAPITAL                x2144
		flipmap['['] = "]";  // RIGHT SQUARE BRACKET                     x005D
		flipmap[']'] = "[";  // LEFT SQUARE BRACKET                      x005B
		flipmap['_'] = "‾";  // OVERLINE                                 x203E
		flipmap['a'] = "ɐ";  // LATIN SMALL LETTER TURNED A              x0250
		flipmap['b'] = "q";  // LATIN SMALL LETTER Q                     x0071
		flipmap['c'] = "ɔ";  // LATIN SMALL LETTER OPEN O                x0254
		flipmap['d'] = "p";  // LATIN SMALL LETTER P                     x0070
		flipmap['e'] = "ǝ";  // LATIN SMALL LETTER TURNED E              x01DD
		flipmap['f'] = "ɟ";  // LATIN SMALL LETTER DOTLESS J WITH STROKE x025F
		flipmap['g'] = "ƃ";  // LATIN SMALL LETTER B WITH TOPBAR         x0183
		flipmap['h'] = "ɥ";  // LATIN SMALL LETTER TURNED H              x0265
		flipmap['i'] = "ı";  // LATIN SMALL LETTER DOTLESS I             x0131
		flipmap['j'] = "ɾ";  // LATIN SMALL LETTER R WITH FISHHOOK       x027E
		flipmap['k'] = "ʞ";  // LATIN SMALL LETTER TURNED K              x029E
		flipmap['l'] = "ʃ";  // LATIN SMALL LETTER ESH                   x0283
		flipmap['m'] = "ɯ "; // LATIN SMALL LETTER TURNED M              x026F
		flipmap['n'] = "u";  // LATIN SMALL LETTER U                     x0075
		flipmap['r'] = "ɹ";  // LATIN SMALL LETTER TURNED R              x0279
		flipmap['t'] = "ʇ";  // LATIN SMALL LETTER TURNED T              x0287
		flipmap['u'] = "n";  // LATIN SMALL LETTER N                     x006E
		flipmap['v'] = "ʌ";  // LATIN SMALL LETTER TURNED V              x028C
		flipmap['w'] = "ʍ";  // LATIN SMALL LETTER TURNED W              x028D
		flipmap['y'] = "ʎ";  // LATIN SMALL LETTER TURNED Y              x028E
		flipmap['{'] = "}";  // RIGHT CURLY BRACKET                      x007D
		flipmap['}'] = "{";  // LEFT CURLY BRACKET                       x007B

	}

	virtual ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, LocalUser *user, bool validated, const std::string &original_line)
	{

		/* If theyre not registered yet we dont want to know.
		 */
		if (user->registered != REG_ALL)
			return MOD_RES_PASSTHRU;

		if (command == "FLIPTEXT")
		{
			std::vector<std::string> newparams;
			std::string buf;

			if (parameters.size() < 2)
				return MOD_RES_DENY;

			for (size_t i = 1; i < parameters.size(); ++i)
			{
				if (buf.empty())
					buf = parameters[i];
				else
					buf += " " + parameters[i];
			}
			newparams.push_back(parameters[0]);
			newparams.push_back(fliptext(buf));

			ServerInstance->Parser->CallHandler("PRIVMSG", newparams, user);

			return MOD_RES_DENY;
		}

		return MOD_RES_PASSTHRU;
	}

	std::string fliptext(std::string &text)
	{
		std::string flipped;
		std::map<char,std::string>::iterator it;

		/* write backwards */
		for (std::string::const_reverse_iterator rit = text.rbegin(); rit != text.rend(); ++rit)
		{
			if ((it = flipmap.find(*rit)) != flipmap.end())
				flipped += it->second;
			else
				flipped += *rit;
		}

		return flipped;
	}
};

MODULE_INIT(ModuleFlipText)