#include <iostream>
#include <fstream>
#include <stdio.h>
#include <string.h>

int main(int argc, char *argv[]) {
    unsigned int loopindex[1024];
    unsigned int loopdepth = 0;
    char *code;

    /** Read le file */
    if(argc < 2) {
        std::cout << "Unable to open file: no path was given." << std::endl;
        return 0;
    }

    bool debug = false;

    for(int i = 0; i < argc; ++i) {
        if(argv[i][0] == '-' && argv[i][1] == 'd')
            debug = true;
    }

    std::ifstream in(argv[1]);

    if(!in.is_open()) {
        std::cout << "Unable to open file: invalid path was given." << std::endl;
        return 0;
    }

    in.seekg (0, std::ios::end);
    int length = in.tellg();
    in.seekg (0, std::ios::beg);

    code = new char[length];

    in.read (code, length);
    in.close();

    char data[30000];
    unsigned int codep = 0;
    unsigned int datap = 0;
    unsigned int maxDataP = 0;

    /** Do le interpretation */
    while(code[codep] != 0) {
        switch(code[codep]) {
            case'+': ++data[datap]; break;
            case'-': --data[datap]; break;
            case '>': ++datap; break;
            case '<': --datap; break;
            case '.': std::cout << data[datap]; break;
            case ',': std::cin >> data[datap]; break;
            case '[':
                ++loopdepth;
                loopindex[loopdepth] = codep;
                break;
            case ']':
                if(data[datap]) codep = loopindex[loopdepth]; else loopdepth--;
                break;
        }

        if(datap > maxDataP) {
            maxDataP = datap;
        }

        ++codep;
    }

    if(debug) {
        std::cout << "\n\nPress any key to show debug data.";
        std::cin.ignore();
        std::cin.get();
        std::cout << "Highest recorded datapointer: " << maxDataP << std::endl;

        for(int i = 0; i <= maxDataP; i++) {
            if(data[i] != 0) {
                std::cout << "Data in cell #" << i << ": " << data[i] << std::endl;
            }
        }
    }

    if(!debug) std::cin.ignore();
    std::cout << "\n\nPress any key to continue.";
    std::cin.get();

    return 0;
}