#pragma once

#include "ast.h"

#include <stdbool.h>
#include <stdint.h>

#define VARIABLES_MAX 64
#define FUNCTIONS_MAX 32

// the longest thing a single type can say when emitted
#define TEXT_LENGTH_MAX 255

enum TypeKind
{
    KIND_VOID,
    KIND_INT32,
    KIND_BYTE,
    KIND_SIZE,
    KIND_ARRAY,
    KIND_CHAR,
    KIND_CHAR_CONSTANT,
    KIND_TUPLE,
    KIND_VALUE
};

struct Type
{
    enum TypeKind kind;
    int64_t number;
    char text[TEXT_LENGTH_MAX + 1];
};

struct Variable
{
    char name[NAME_LENGTH_MAX + 1];
    int64_t value;
    bool declared;
};

struct Function
{
    char name[NAME_LENGTH_MAX + 1];
    const struct Node* node;
    bool defined;
};

struct Machine
{
    struct Variable variables[VARIABLES_MAX];
    struct Function functions[FUNCTIONS_MAX];
    struct Type returned;
    int depth;
};

enum RunStatus
{
    RUN_DONE,
    RUN_FAILED,
    RUN_RETURNED
};

void machine_init(struct Machine* machine);
enum RunStatus execute(struct Machine* machine, const struct Node* statement);