#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>

#include <SFML/System.h>
#include <SFML/Graphics.h>
#include <SFML/Window.h>

#include "ls7emulator.h"
#include "config.h"
#include "events.c"
#include "cpu.c"
#include "memory.c"
#include "video.c"
#include "keyboard.c"



void openFile(const char *inputFile){
    FILE *file = fopen(inputFile, "rb");
    
    if (file != NULL){
        fseek(file, 0, SEEK_END);
        long filelen = ftell(file);
        rewind(file);
        
        fread(rom, filelen, 1, file);
    
        printf("Loaded File\n");
    } else {
        printf("Error while opening file\n");
        exit(1);
    }
    
    fclose(file);
}

void resetSystem(){
    initVideo();
    updateVideo();
    reset6502();
}

void updateRenderStates(){
    renderStates.transform = sfTransform_Identity;
    sfTransform_scale(&renderStates.transform, displayScale, displayScale);
}

void drawScreen(){
    sfRenderWindow_drawVertexArray(window, renderArray, &renderStates);
}

int main(int argc, char *argv[]){
    window = sfRenderWindow_create((sfVideoMode){800, 600, 24}, "LS7 Emulator", sfResize | sfClose, NULL);
    sfRenderWindow_setVerticalSyncEnabled(window, sfFalse);
    sfRenderWindow_setFramerateLimit(window, 60);
    sfRenderWindow_setKeyRepeatEnabled(window, sfFalse);

    renderStates = sfRenderStates_default();
    sfTransform_scale(&renderStates.transform, 2, 2);
    
    if (argc == 2) { openFile(argv[1]); }
    else {
        printf("Please specify a input file\n");
        exit(1);
    }
    resetSystem();
    
    while (sfRenderWindow_isOpen(window)){
        pollEvents(window);
        
        for (int i = 0; i < 4096 * 16; i++) step6502();
        irq6502();
        
        sfRenderWindow_clear(window, BACKCOLOR);
        updateVideo();
        drawScreen();
        sfRenderWindow_display(window);
    }
    
    sfRenderWindow_destroy(window);

    return 0;
}