#include "v8mapparser.hpp"
#include <string>
#include <iostream>
#include <fstream>
using namespace std;
const bool V8MapParser::LoadMap(const char* _kpcFileName) {
	std::ifstream InFile;
	EParserState eState = PARSERSTATE_UNKNOWN;

	InFile.open(_kpcFileName, std::ios::in);
	if(InFile.is_open())
	{
		std::string Line;
		bool bAdvance = true;
		bool bGoing = true;
		while(bGoing)
		{
			if(bAdvance)
			{
				if(!std::getline(InFile, Line))
				{
					bGoing = false;
          // without this break, loop control allows the final empty string to get passed into ParseFunctions()
          break; 
				}
			}
			bAdvance = true;
			if(eState == PARSERSTATE_UNKNOWN)
			{
				if(Line.find(KEYWORD_ENTITY) != string::npos)
				{
					eState = PARSERSTATE_ENTITY;
					continue;
				} else if (Line.find(KEYWORD_PREFAB) != string::npos || Line.find(KEYWORD_GLOBAL) != string::npos) {
                    // prefab and global share an indentation level
                    // both encapsulate similar objects
                    eState = PARSERSTATE_PREFAB;
                    continue;
                } else {
                    cout << "Warning: PARSERSTATE_UNKNOWN and no cases met." << endl;
                }
			} else if (eState == PARSERSTATE_PREFAB) {
                eState = this->ParsePrefab(Line);
            }
			else if(eState == PARSERSTATE_ENTITY)
			{
				eState = this->ParseEntity(Line);
			}
			else if(eState == PARSERSTATE_WORLDSPAWN)
			{
				eState = this->ParseWorldSpawn(Line);
			}
			else if(eState == PARSERSTATE_BRUSH)
			{
				eState = this->ParseBrush(Line);
				//bAdvance = false;
			}
			else if(eState == PARSERSTATE_VERTEX)
			{
				eState = this->ParseVertex(Line);
				if(eState != PARSERSTATE_VERTEX)
				{
					bAdvance = false;
				}
			}
			else if(eState == PARSERSTATE_FACE)
			{
				eState = this->ParseFace(Line);
				if(eState != PARSERSTATE_FACE)
				{
					bAdvance = false;
				}
			}
		}
		InFile.close();
	}
	else
	{
		return(false);
	}

	return(true);
}

EParserState V8MapParser::ParsePrefab(const std::string _Line) {
    // this is going with the idea that its possible to correctly parse the map file
    // if prefabs are simply broken and de-indented.

    // typically entities are listed first, then brushes, but just in case.
    if (_Line.find(KEYWORD_ENTITY) != string::npos) {
        return PARSERSTATE_ENTITY;
    } else {
        return PARSERSTATE_BRUSH;
    }
}