#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "lexer.h"
#include "common.h"
#include "error.h"
#include "logic.h"
#include "gate.h"


static struct token *cursor;

#ifdef emit_error
#warning "Remember to remove the global emit_error"
#undef emit_error
#endif /* ifdef emit_error */

#define emit_error(...) fprintf(stderr, "Error (%zd,%zd): ", cursor->loc.line, cursor->loc.column);\
                        fprintf(stderr, __VA_ARGS__)


//static struct op_lookup uop_handlers[] = {
//	{.str = "not",   .handler = logic_nand},
//};
//
//static struct op_lookup bop_handlers[] = {
//	{.str = "and",   .handler = logic_and},
//	{.str = "or",    .handler = logic_or},
//	{.str = "nand",  .handler = logic_nand},
//	{.str = "nor",   .handler = logic_nor},
//	{.str = "xor",   .handler = logic_xor}
//};
//
//static struct tok_lookup tok_handlers[] = {
//	{.str = "input",   .handler = parse_input},
//	{.str = "module", .handler = parse_module},
//	{.str = "expr",   .handler = parse_expr}
//};

static int
expect(enum TOKEN_TYPE e) {
	char *expected_desc = "(internal error)";
	char *observed_desc = "(internal error)";

	if (cursor->type != e) {
		expected_desc = get_token_description(e);
		observed_desc = get_token_description(cursor->type);
		emit_error("Expected %s, got %s\n", expected_desc, observed_desc);
		return 1;
	}

	return 0;
}


int
parse(struct token *t) {
	cursor = t;
	expect(TOK_MODULE);
	return 0;
}