/* A more robust parser for the game. */

#include <string>
#include <iostream>
#include <sstream>
#include <stdlib.h>
#include <unistd.h>
#include <vector>
#include "Parser.h"

using namespace std;

string myToUpper(string input) {
	string output;
	
	for (int i = 0 ; i < input.size(); ++i)
	{
		int numeric;
		
		if ((input[i] - 0 >= 97) && (input[i] - 0 <= 122))
		{
			numeric = input[i] - 32;
			output.push_back((char)numeric);
		}
		else output.push_back(input[i]);
	}
	
	return output;
}

void parseAndMove(vector<string> tokens, Board& board) {
	int col;
	int row;
	
	if(tokens[0].size() == 2) {
		if(tokens[1].size() >= 3 && tokens[1].size() <= 5) {
			cout << "Inside parser " << tokens[0] << "\n\n";
			if(tokens[0][0] - 'A' < 0 || tokens[0][0] - 'A' > 8) {
				cout << "Error. Invalid move location. (1st coord.)\n\n";
				cout << tokens[0][0] << " " << (tokens[0][0] - 'A') << "\n\n";
				return;
			}
			else if(tokens[0][1] - '0' < 0 || tokens[0][1] - '0' > 8) {
				cout << "Error. Invalid move location. (2nd coord.)\n\n";
				return;
			}
			else {
				col = tokens[0][0] - 'A';
				row = 8 - (tokens[0][1] - '0');
			}
			
			if(tokens[1] == "LEFT" || tokens[1] == "RIGHT" || tokens[1] == "FWD") {
				moves m(row, col, tokens[1]);
				board.move(m);
			}
			else {
				cout << "Error. Invalid moveType. (type)\n\n";
				return;
			}
		}
		else {
			cout << "Error. Invalid moveType. (size)\n\n";
			return;
		}
	}
	else {
		cout << "Error. Invalid move location. (size)\n\n";
		return;
	}
}

void parseCmd(vector<string> tokens, Board& board) {
	if(tokens[0] == "UNDO") {
		board = *(board.undo());
	}
	
	else if(tokens[0] == "DISPLAYRECORD") {
		cout << "record size: " << board.getRecord().size();
		vector<Board> record = board.getRecord();
		
		for(int i = 0; i < record.size(); ++i) {
			record[i].displayBoard();
		}
	}
	
	else {
		parseAndMove(tokens, board);
	}
}

void parse(string in, Board& board) {
	string input = myToUpper(in);
	stringstream ss(input);
	vector<string> tokens;
	string temp;
	while(ss >> temp) {
		tokens.push_back(temp);
	}
	
	parseCmd(tokens, board);
}