#include <stdio.h>

#include "src/f6502.h"


int load(uint8_t* mem, FILE* file) {
    return fread(mem, 65536, 1, file);
}

void print_registers(const f6502_Registers* regs,
                     FILE* file) {
    fprintf(file, "PC: $%04x\n", regs->PC);
    fprintf(file, " S:   $%02x\n", regs->S);
    fprintf(file, " A:   $%02x\n", regs->A);
    fprintf(file, " X:   $%02x\n", regs->X);
    fprintf(file, " Y:   $%02x\n", regs->Y);
    fprintf(file, " P:   $%02x\n", regs->P);
}

static f6502_Core core = {0};

int main(int argc, char* argv[]) {
    f6502_init(&core);

    if (load(core.memory.ram, stdin) != 1) {
        fprintf(stderr, "Failed to load e6502 memory\n");
        return 1;
    }

    core.memory.ram[0xbffc] = 0;
    f6502_reset(&core);
    core.registers.PC = 0x400;

    int total_clocks = 0;
    int clocks_elapsed = 1;

    while (clocks_elapsed > 0) {
        clocks_elapsed = f6502_step(&core, 1000);
        if (clocks_elapsed < 0) total_clocks -= clocks_elapsed;
        else total_clocks += clocks_elapsed;
    }

    fprintf(stdout, "Ran %d\n", total_clocks);
    print_registers(&core.registers, stdout);

    return 0;
}