#include "uclisp.h"
#include "internal.h"

#include <stddef.h>
#include <stdlib.h>
#include <string.h>

static struct ucl_object *ucl_object_alloc();

struct ucl_object *ucl_cell_create(struct ucl_object *car, struct ucl_object *cdr)
{
    struct ucl_object* obj = ucl_object_alloc();
    obj->type = UCL_TYPE_CELL;
    obj->cell.car = car;
    obj->cell.cdr = cdr;
    return obj;
}

struct ucl_object *ucl_int_create(int integer)
{
    struct ucl_object* obj = ucl_object_alloc();
    obj->type = UCL_TYPE_INT;
    obj->integer = integer;
    return obj;
}

struct ucl_object *ucl_symbol_create(const char *symbol)
{
    struct ucl_object* obj = ucl_object_alloc();
    obj->type = UCL_TYPE_SYMBOL;
    obj->symbol = strdup(symbol);
    return obj;
}

struct ucl_object *ucl_string_create(const char *string)
{
    struct ucl_object* obj = ucl_object_alloc();
    obj->type = UCL_TYPE_STRING;
    obj->string = strdup(string);
    return obj;
}

struct ucl_object *ucl_error_create(const char *error)
{
    struct ucl_object* obj = ucl_object_alloc();
    obj->type = UCL_TYPE_ERROR;
    obj->error = strdup(error);
    return obj;
}


struct ucl_object *ucl_builtin_create(ucl_builtin builtin)
{
    struct ucl_object* obj = ucl_object_alloc();
    obj->type = UCL_TYPE_BUILTIN;
    obj->builtin = builtin;
    return obj;
}

static struct ucl_object* ucl_object_alloc() {
    return malloc(sizeof(struct ucl_object));
}

void ucl_object_delete(struct ucl_object *obj) {
    if (obj == NULL) {
        return;
    }

    switch (obj->type) {
        case UCL_TYPE_CELL:
            ucl_object_delete(obj->cell.car);
            obj->cell.car = NULL;
            ucl_object_delete(obj->cell.cdr);
            obj->cell.cdr = NULL;
            break;
        case UCL_TYPE_SYMBOL:
            free((void *) obj->symbol);
            obj->symbol = NULL;
            break;
        case UCL_TYPE_STRING:
            free((void *) obj->string);
            obj->string = NULL;
            break;
        case UCL_TYPE_ERROR:
            free((void *) obj->error);
            obj->error = NULL;
            break;
        case UCL_TYPE_INT:
        case UCL_TYPE_BUILTIN:
        case UCL_TYPE_COUNT:
            break;
    }
    free(obj);
}