//Noman Hamlani
//N16943203
//CS3313
//Asignment 1

#ifdef _WINDOWS
#include <GL/glew.h>
#endif

#include <SDL.h>
#include <SDL_opengl.h>
#include <SDL_image.h>
#include "Matrix.h"
#include "ShaderProgram.h"

#ifdef _WINDOWS
#define RESOURCE_FOLDER ""
#else
#define RESOURCE_FOLDER "NYUCodebase.app/Contents/Resources/"
#endif

SDL_Window *displayWindow;

int main(int argc, char *argv[])
{
    SDL_Init(SDL_INIT_VIDEO);
    displayWindow = SDL_CreateWindow("Noman Hamlani - Assignement 2", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 360, SDL_WINDOW_OPENGL);
    SDL_GLContext context = SDL_GL_CreateContext(displayWindow);
    SDL_GL_MakeCurrent(displayWindow, context);

#ifdef _WINDOWS
    glewInit();
#endif

    // setup
    glViewport(0, 0, 640, 360);
    ShaderProgram program(RESOURCE_FOLDER"vertex_textured.glsl", RESOURCE_FOLDER"fragment_textured.glsl");

    Matrix projection_matrix;
    Matrix model_matrix;
    Matrix view_matrix;

    projection_matrix.setOrthoProjection(-3.55f, 3.55f, -2.0f, 2.0f, -1.0f, 1.0f);

    SDL_Event event;
    bool done = false;
    while (!done) {
        while (SDL_PollEvent(&event)) {
            if (event.type == SDL_QUIT || event.type == SDL_WINDOWEVENT_CLOSE) {
                done = true;
            }
        }

        program.setModelMatrix(model_matrix);
        program.setProjectionMatrix(projection_matrix);
        program.setViewMatrix(view_matrix);

        glClear(GL_COLOR_BUFFER_BIT);

        glUseProgram(program.programID);

        float shipVertices[] = { -0.5, -0.5, 0.5, -0.5, 0.5, 0.5, -0.5, -0.5, 0.5, 0.5, -0.5, 0.5 };
        glVertexAttribPointer(program.positionAttribute, 2, GL_FLOAT, false, 0, shipVertices);
        glEnableVertexAttribArray(program.positionAttribute);

        glDrawArrays(GL_TRIANGLES, 0, 6);
        glDisableVertexAttribArray(program.positionAttribute);

        SDL_GL_SwapWindow(displayWindow);
    }

    SDL_Quit();
    return 0;
}