#ifndef APFL_VALUE_H
#define APFL_VALUE_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stddef.h>
#include <stdio.h>

#include "apfl.h"

enum apfl_value_type {
    APFL_VALUE_NIL,
    APFL_VALUE_BOOLEAN,
    APFL_VALUE_NUMBER,
    APFL_VALUE_STRING,
    APFL_VALUE_LIST,
    APFL_VALUE_DICT,
    // TODO: functions/closures
};

struct apfl_list_data;
typedef struct apfl_list_data *apfl_list;

struct apfl_dict_data;
typedef struct apfl_dict_data *apfl_dict;

struct apfl_value {
    enum apfl_value_type type;
    union {
        bool boolean;
        apfl_number number;
        apfl_refcounted_string string;
        apfl_list list;
        apfl_dict dict;
    };
};


bool apfl_value_eq(const struct apfl_value, const struct apfl_value);
struct apfl_value apfl_value_move(struct apfl_value *src);
struct apfl_value apfl_value_incref(struct apfl_value);
void apfl_value_print(struct apfl_value, FILE *);
void apfl_value_deinit(struct apfl_allocator, struct apfl_value *);

enum get_item_result {
    GET_ITEM_OK,
    GET_ITEM_KEY_DOESNT_EXIST,
    GET_ITEM_NOT_A_CONTAINER,
    GET_ITEM_WRONG_KEY_TYPE,
};

enum get_item_result apfl_value_get_item(struct apfl_allocator allocator, struct apfl_value container, struct apfl_value key, struct apfl_value *out);

apfl_list apfl_list_incref(apfl_list);
size_t apfl_list_len(apfl_list);
bool apfl_list_get_item(struct apfl_allocator, apfl_list, size_t index, struct apfl_value *out);
void apfl_list_unref(struct apfl_allocator, apfl_list);

apfl_dict apfl_dict_incref(apfl_dict);
bool apfl_dict_get_item(struct apfl_allocator, apfl_dict, struct apfl_value key, struct apfl_value *out);
void apfl_dict_unref(struct apfl_allocator, apfl_dict);

struct apfl_editable_list_data;
typedef struct apfl_editable_list_data *apfl_editable_list;

apfl_editable_list apfl_editable_list_new(struct apfl_allocator);
bool apfl_editable_list_append(apfl_editable_list, struct apfl_value);
bool apfl_editable_list_append_list(apfl_editable_list, apfl_list);
void apfl_editable_list_destroy(apfl_editable_list);

/* Finalize the list and return a non-editable list.
 * This also destroys the editable list object, so it's no longer safe to use it.
 * Returns NULL on failure
 */
apfl_list apfl_editable_list_finalize(apfl_editable_list);

struct apfl_editable_dict_data;
typedef struct apfl_editable_dict_data *apfl_editable_dict;

apfl_editable_dict apfl_editable_dict_new(struct apfl_allocator);
apfl_editable_dict apfl_editable_dict_new_from_dict(struct apfl_allocator, apfl_dict);
bool apfl_editable_dict_get(apfl_editable_dict, struct apfl_value key, struct apfl_value *out);
bool apfl_editable_dict_set(apfl_editable_dict, struct apfl_value key, struct apfl_value value);
void apfl_editable_dict_delete(apfl_editable_dict, struct apfl_value key);
void apfl_editable_dict_destroy(apfl_editable_dict);

/* Finalize the dictionary and return a non-editable dictionary.
 * This also destroys the editable dictionary object, so it's no longer safe to use it.
 * Returns NULL on failure
 */
apfl_dict apfl_editable_dict_finalize(apfl_editable_dict);

#ifdef __cplusplus
}
#endif

#endif