#pragma once

#include "dvec.h"
#include "hmap.h"
#include "maxint.h"

enum {
	ICC_RUN,
	ICC_INPUT,
	ICC_OUTPUT,
	ICC_HALT
};

enum {
	ICC_OK,
	ICC_INV_INST,
	ICC_OOB_WRITE,
	ICC_OOB_READ,
};

enum {
	ICC_PARAM_POS = 0,
	ICC_PARAM_IMM = 1,
	ICC_PARAM_REL = 2
};

enum {
	ICC_INST_ADD = 1,
	ICC_INST_MULT = 2,
	ICC_INST_STORE = 3,
	ICC_INST_LOAD = 4,
	ICC_INST_JMPT = 5,
	ICC_INST_JMPF = 6,
	ICC_INST_TLT = 7,
	ICC_INST_TEQ = 8,
	ICC_INST_BASE = 9,

	ICC_INST_HALT = 99
};

struct icc {
	int state;
	struct maxint in, out;

	struct maxint read_addr;
	struct maxint write_addr;
	bool abort_on_err;

	bool debug;

	/* general purpose registers */
	struct maxint r1, r2, r3, r4, tmp;

	bool line_terminated;

	struct maxint rip, base;
	struct hmap instructions;
};

extern const char *icc_err[];

void icc_init(struct icc *icc);
void icc_deinit(struct icc *icc);
void icc_copy(struct icc *dst, struct icc *src);
void icc_reset(struct icc *icc, struct hmap *inst);

void icc_parse_inst(struct icc *icc, const char *str, size_t len);
int icc_step_inst(struct icc *icc);

struct hmap_link *icc_write_any(struct icc *icc,
	struct maxint *addr, struct maxint *in);
int icc_write(struct icc *icc, struct maxint *addr, struct maxint *in);
int icc_read(struct icc *icc, struct maxint *addr, struct maxint **out);

const char *icc_literal_str(struct icc *icc, struct maxint *addr, size_t zfill);
const char *icc_value_str(struct icc *icc, struct maxint *addr, size_t zfill);

int icc_param_mode(int inst, int param);
int icc_get_param(struct icc *icc, struct maxint *tmp, int param, struct maxint *out);
int icc_get_dest(struct icc *icc, struct maxint *tmp, int param, struct maxint *out);

void icc_debug_print(struct icc *icc, struct maxint *addr);