#include "oopless-parser.hpp"
#include "brushdef.hpp"
#include <iostream>
#include <iomanip>
using namespace std;

// human read output
void print_TFace(const TFace x, int i) {
    cout << "----------------------------" << endl;
    cout << "TFace #" << i << endl;
    cout << "\tOffset X: " << x.m_fXOffset << endl;
    cout << "\tOffset Y: " << x.m_fYOffset << endl;
    cout << "\tScale X: " << x.m_fXScale << endl;
    cout << "\tScale Y: " << x.m_fYScale << endl;
    cout << "\tRotation: " << x.m_fRotation << endl;
    for (unsigned int i = 0; i < x.m_Indices.size(); ++i) {
        cout << x.m_Indices[i] << ", ";
    }
    cout << "\n\tMaterial: " << x.m_Material << endl;
    cout << "----------------------------" << endl;
}

// for bash script to compare strings.
void print_TFace(const TFace x) {
#define FMT_PRECISION 6
    cout <<"\t\t\t" 
         << fixed << setprecision(FMT_PRECISION) << x.m_fXOffset << " " 
         << fixed << setprecision(FMT_PRECISION) << x.m_fYOffset << " " 
         << fixed << setprecision(FMT_PRECISION) << x.m_fXScale << " " 
         << fixed << setprecision(FMT_PRECISION) << x.m_fYScale << " "
         << fixed << setprecision(FMT_PRECISION) << x.m_fRotation << " ";
     for (const int index : x.m_Indices) {
         cout << index << " ";
     }
     cout << "0x" << hex << x.hex << " "
          <<  x.m_Material;
     cout << endl;
}

// jump to a line in fstream
// this is to set the stream position to test individual parsing functions.
void gotoline(ifstream &f, unsigned int n) {
    string t;
    for (unsigned int i = 0; i < n; ++i) {
        getline(f, t);
    }
}

void test_parsevertices (const char * const fn, const int ln) {
    ifstream fin;
    fin.open(fn);
    string line;
    gotoline(fin, ln);
    vector<Eigen::Vector3f> x = parse_vertices(fin);
    cout << "size has a size of " << x.size() << endl;
    // display data retrieved.
    for (unsigned int i = 0; i < x.size(); ++i) {
        for (unsigned int j = 0; j < 3; ++j) {
            cout << x[i][j] << "\t";
        }
        cout << endl;
    }
    getline(fin, line);
    cout << "check stream state \n current line: " << endl;
    cout << line << endl;
    fin.close();
}

// test if faces are parsing correctly
void test_parseface(const char * const fn, const int ln) {
    ifstream fin;
    fin.open(fn);
    string line;
    gotoline(fin, ln);
    vector<TFace> x = parse_face(fin);
//    cout << "size has a size of " << x.size() << endl;
//    display data retrieved.
    for (unsigned int i = 0; i < x.size(); ++i) {
        print_TFace(x[i]);
    }
    // parse_face will rollback to a position if it comes across a keyword
    // check the line that fin will retrieve.
//    getline(fin, line);
//    cout << "check stream state \n current line: " << endl;
//    cout << line << endl;
    fin.close();
}

int main(int argc, const char *argv[]) {
//    test_parsevertices("empty.map", 10);
//    test_parseface("empty.map", 19);

//    test_parsevertices("pocket-infinity.map", 134);

    if (string(argv[1]) == "--face" || string(argv[1]) == "-f") {
        if (argc < 4) {
            cerr << "expected: 3 arguments to program - given: " << argc << endl;
            return -1;
        }
        test_parseface(argv[2], stoi(argv[3]));
    }
}