#include "constants.h"
#include "file.h"

#define _GNU_SOURCE
#include <stdint.h>
#include <stdio.h>
#include <getopt.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
#include <stdlib.h>

#include "emu.c"

uint16_t* fileRead(char* name) {
	FILE* fp = fopen(name, "rb");
	if (!(access(name, F_OK) == 0)) {
		errno = -1;
		printf("Hi?\n");
		return 0;
	}
	
	struct stat st;
	stat(name, &st);
	int length = st.st_size;

	uint16_t rbuf[length+1];

	for (int i = 0; i < length; i++) {
		fread(&rbuf[i], 2, 1, fp);
	}
	fclose(fp);

	uint16_t* tmp = rbuf;
	return tmp;
}

//blanks out memory and initializes various things
int init() {
	for (int i = 0; i <= 0xFFFF; i++) { //blank memory
		memory[i] = 0x00;
	}
	
	cpuStatus.brk = 0;
	cpuStatus.carry = 0;
	cpuStatus.dec = 0;
	cpuStatus.ird = 0;
	cpuStatus.neg = 0;
	cpuStatus.overflow = 0;
	cpuStatus.zero = 0;

	return 0;
}

void help(char* exe) {
	printf("%s - a 6502 emulator.\n"
		   "	Usage: %s [prg]", exe, exe);
}

int main(int argc, char* argv[]) {
	char* filename = *++argv; //TODO: jankiest thing ever

	/*uint16_t* binary = (uint16_t*)fileRead(filename);

	//uint16_t binary[] = {0xe7e6, 0xeaea, 0x01e6, 0xe8ea, 0xc8ea, 0x00ea};
	int size = sizeof(binary)/sizeof(binary[0])+1;
	uint8_t exec[size*2];
	for (int i,i2 = 0; i < size-1; i++) {
		printf("%04X\n", binary[i]);
		uint8_t lsb = (binary[i] & 0xFF);
		uint8_t hsb = (binary[i] & 0xFF00) >> 8;
		exec[i2]   = lsb;
		exec[++i2] = hsb;
		i2++;
	}*/
	uint8_t* exec = (uint8_t*)bin;
	int size = __6502_functional_test_bin_len;
	printf("Program ROM:\n");
	for (int i = 0; i < size; i++) {
		printf("0x%02X\n", exec[i]);
	}
	emulate(exec, size, 0x0400); //hacky lol
	return 0;
}