/*
 * Copyright 2006-2018 Adrian Thurston <thurston@colm.net>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <stdbool.h>

#include <iostream>

#include "compiler.h"

using namespace std;

void Compiler::writeTransList( PdaState *state )
{
	ostream &out = *outStream;
	for ( TransMap::Iter trans = state->transMap; trans.lte(); trans++ ) {
		/* Write out the from and to states. */
		out << "\t" << state->stateNum << " -> " << trans->value->toState->stateNum;

		/* Begin the label. */
		out << " [ label = \""; 
		long key = trans->key;  
		LangEl *lel = langElIndex[key];
		if ( lel != 0 )
			out << lel->name;
		else
			out << (char)key;

		if ( trans->value->actions.length() > 0 ) {
			out << " / ";
			for ( ActDataList::Iter act = trans->value->actions; act.lte(); act++ ) {
				switch ( *act & 0x3 ) {
				case 1: 
					out << "S(" << trans->value->actOrds[act.pos()] << ")";
					break;
				case 2: {
					out << "R(" << prodIdIndex[(*act >> 2)]->data <<
							", " << trans->value->actOrds[act.pos()] << ")";
					break;
				}
				case 3: {
					out << "SR(" << prodIdIndex[(*act >> 2)]->data << 
							", " << trans->value->actOrds[act.pos()] << ")";
					break;
				}}
				if ( ! act.last() )
					out << ", ";
			}
		}

		out << "\" ];\n";
	}
}

void Compiler::writeDotFile( PdaGraph *graph )
{
	ostream &out = *outStream;
	out << 
		"digraph " << parserName << " {\n"
		"	rankdir=LR;\n"
		"	ranksep=\"0\"\n"
		"	nodesep=\"0.25\"\n"
		"\n";
	
	/* Define the psuedo states. Transitions will be done after the states
	 * have been defined as either final or not final. */
	out << 
		"	node [ shape = point ];\n";
	
	for ( int i = 0; i < graph->entryStateSet.length(); i++ )
		out << "\tENTRY" << i <<  " [ label = \"\" ];\n";

	out << 
		"\n"
		"	node [ shape = circle, fixedsize = true, height = 0.6 ];\n";

	/* Walk the states. */
	for ( PdaStateList::Iter st = graph->stateList; st.lte(); st++ )
		out << "	" << st->stateNum << " [ label = \"" << st->stateNum << "\" ];\n";

	out << "\n";

	/* Walk the states. */
	for ( PdaStateList::Iter st = graph->stateList; st.lte(); st++ )
		writeTransList( st );

	/* Start state and other entry points. */
	for ( PdaStateSet::Iter st = graph->entryStateSet; st.lte(); st++ )
		out << "\tENTRY" << st.pos() << " -> " << (*st)->stateNum << " [ label = \"\" ];\n";

	out <<
		"}\n";
}

void Compiler::writeDotFile()
{
	writeDotFile( pdaGraph );
}