// Represent
//
// Douglas Thrift
//
// $Id$

#include "Hexadecimal.hpp"
#include "DataType.hpp"

#ifdef _WIN32
#pragma warning(disable:4267)
#endif

#include <menes-app/simple.hpp>

int Main(const app::Options& options)
{
	Represent represent;

	return 0;
}

Represent::Represent()
{
	parse();

	api::Cout << "Content-Type: text/html; charset=UTF-8\r\n\r\n" << ios::Flush;

	xml::TextWriter xhtml(api::Cout);
	xml::ScopeElement table(xhtml, "table");

	headings(xhtml);
	form(xhtml);
	output(xhtml);
}

struct Represent::Item
{
	DataType type;
	ext::String data;
	Input input;
	Item(const DataType& type, const ext::String& data, Input input) : type(type), data(data), input(input) {}
};

void Represent::parse()
{
	ext::String query(env.get("QUERY_STRING"));

	if (env.get("REQUEST_METHOD") == "POST")
	{
		ext::Buffer content(lexical_cast<size_t>(env.get("CONTENT_LENGTH")));

		api::Cin.ReadFully(content.Begin(), content.GetSize());

		query = content;
	}

	ext::Vector<ext::String> pairs(query.Split('&'));

	_foreach (ext::Vector<ext::String>, pair, pairs)
	{
		ext::String::ConstIterator equal(pair->FindFirst('='));
		ext::String name(pair->Begin(), equal), value(equal != pair->End() ? equal + 1 : equal, pair->End());

		cgi.insert(std::pair<std::string, std::string>(name, value));
	}
}

void Represent::headings(xml::TextWriter& xhtml)
{
	xml::ScopeElement tr(xhtml, "tr");
	ext::String headings[] = { "Data Type", "Data Representation", "Input", "Storage" };

	_foru (index, 0, sizeof (headings) / sizeof (ext::String))
	{
		xml::ScopeElement th(xhtml, "th");

		xhtml.OutputText(headings[index]);
	}
}

void Represent::form(xml::TextWriter& xhtml)
{
	xml::ScopeElement tr(xhtml, "tr");

	{
		xml::ScopeElement td(xhtml, "td"), select(xhtml, "select");

		xhtml.SetAttribute("name", "type");

		DataType type(cgi.find("type") != cgi.end() ? DataType::Type(lexical_cast<unsigned>(cgi.find("type")->second)) : DataType::TYPE_bool);

		_foreach (ext::Vector<DataType>, type_, DataType::enumerate())
		{
			xml::ScopeElement option(xhtml, "option");

			if (*type_ == type) xhtml.SetAttribute("selected", "selected");

			xhtml.SetAttribute("value", lexical_cast<ext::String>(DataType::Type(*type_)));
			xhtml.OutputText(*type_);
		}
	}

	{
		xml::ScopeElement td(xhtml, "td"), input(xhtml, "input");

		xhtml.SetAttribute("name", "data");
		xhtml.SetAttribute("size", "64");
		xhtml.SetAttribute("type", "text");

		ext::String data(cgi.find("data") != cgi.end() ? cgi.find("data")->second : std::string());

		xhtml.SetAttribute("value", data);
	}

	{
		xml::ScopeElement td(xhtml, "td"), select(xhtml, "select");

		ext::String inputs[] = { "Normal", "Binary", "Hexadecimal" };
		Input input(cgi.find("input") != cgi.end() ? Input(lexical_cast<unsigned>(cgi.find("input")->second)) : INPUT_Normal);

		_foru (input_, INPUT_Normal, INPUT_Hexadecimal + 1)
		{
			xml::ScopeElement option(xhtml, "option");

			if (Input(input_) == input) xhtml.SetAttribute("selected", "selected");

			xhtml.SetAttribute("value", lexical_cast<ext::String>(input_));
			xhtml.OutputText(inputs[input_]);
		}
	}

	xml::ScopeElement td(xhtml, "td"), input(xhtml, "input");

	xhtml.SetAttribute("type", "submit");
	xhtml.SetAttribute("value", "Store");
}

void Represent::output(xml::TextWriter& xhtml)
{
	typedef std::multimap<std::string, std::string>::size_type MultiMapSize;

	std::set<MultiMapSize, std::greater<MultiMapSize> > count;
	ext::String names[] = { "type", "data", "input" };

	_foru (index, 0, sizeof (names) / sizeof (ext::String)) count.insert(cgi.count(names[index]));

	typedef std::multimap<std::string, std::string>::const_iterator MultiMapConstIterator;

	MultiMapConstIterator type(cgi.lower_bound("type")), type_(cgi.upper_bound("type")), data(cgi.lower_bound("data")), data_(cgi.upper_bound("data")), input(cgi.lower_bound("input")), input_(cgi.upper_bound("input"));
	ext::Vector<Item> items;

	_foru (index, 0, *count.begin())
	{
		Item item(type != type_ ? DataType::Type(lexical_cast<unsigned>(type->second)) : DataType::TYPE_bool, data != data_ ? data->second : std::string(), input != input_ ? Input(lexical_cast<unsigned>(input->second)) : INPUT_Normal);

		items.InsertLast(item);

		if (type != type_) ++type;
		if (data != data_) ++data;
		if (input != input_) ++input;
	}

	_rfor (MultiMapConstIterator, delete_, cgi.lower_bound("delete"), cgi.upper_bound("delete")) items.RemoveAt(lexical_cast<size_t>(delete_->second));

	_foreach (ext::Vector<Item>, item, items) switch (item->type)
	{
	case DataType::TYPE_bool:
		output<bool>(xhtml, *item);

		break;
	case DataType::TYPE_char:
		output<char>(xhtml, *item);

		break;
	}
}