#pragma once

/// \file text_value.h
/// \author Folling <folling@ikarus.world>

#include <ikarus/macros.h>
#include <ikarus/stdtypes.h>

/// \addtogroup values Values
/// @{

IKARUS_BEGIN_HEADER

/// \brief A textual value. For example "Surname" or "Description"
struct IkarusTextValue;

/// \brief Creates a text value.
/// \return The value or null if an error occurs.
/// \remark Must be freed with #ikarus_free.
IKA_API IkarusTextValue * ikarus_text_value_create();

/// \brief Fetches the underlying data of a number value at a specific index.
/// \param value The number value.
/// \pre \li Must not be null.
/// \param idx The index of the data to fetch.
/// \pre \li Must be less than the size of the value.
/// \return The underlying data or null if an error occurs or the value is undefined.
/// \remark This value is owned by LibIkarus and must not be freed.
IKA_API char const * ikarus_text_value_get(IkarusTextValue * value, size_t idx);

/// \brief Fetches the size of the underlying data of a text value.
/// \param value The text value.
/// \pre \li Must not be null.
/// \return The size of the underlying data or 0 if an error occurs or the value is undefined.
IKA_API size_t ikarus_text_value_get_size(IkarusTextValue const * value);

/// \brief Sets the data of a text value at a specific index.
/// \param value The text value.
/// \pre \li Must not be null.
/// \param idx The index of the data to set.
/// \pre \li Must be less than the size of the value.
/// \param new_data The new data. LibIkarus assumes ownership of this pointer.
IKA_API void ikarus_text_value_set(IkarusTextValue * value, size_t idx, char const * new_data);

/// \brief Removes a data from a text value.
/// \param value The text value.
/// \pre \li Must not be null.
/// \param idx The index of the data to remove.
/// \pre \li Must be less than the size of the value.
IKA_API void ikarus_text_value_remove(IkarusTextValue * value, size_t idx);

/// \brief Inserts a data into a text value.
/// \param value The text value.
/// \pre \li Must not be null.
/// \param idx The index of the data to insert.
/// \pre \li Must be less than or equal to the size of the value.
/// \param new_data The new data.
IKA_API void ikarus_text_value_insert(IkarusTextValue * value, size_t idx, char const * new_data);

/// \brief Clears a text value.
/// \param value The text value.
/// \remark Noop if the value is undefined.
IKA_API void ikarus_text_value_clear(IkarusTextValue * value);

/// \brief Checks if a text value is undefined.
/// \param value The text value.
/// \pre \li Must not be null.
/// \return True if the value is undefined, false otherwise.
IKA_API bool ikarus_text_value_is_undefined(IkarusTextValue const * value);

/// \brief Changes a text value's undefined state.
/// \param value The text value.
/// \pre \li Must not be null.
/// \param undefined The new undefined state.
/// \remark Noop if the value is already undefined.
/// \remark If the value is set to undefined, all data will be cleared.
/// \remark If the value is set to not undefined, the value is as if newly created.
IKA_API void ikarus_text_value_set_undefined(IkarusTextValue * value, bool undefined);

/// \brief Converts a text value to a string.
/// \param value The text value to convert.
/// \pre \li Must not be null.
/// \return The converted string.
/// \remark Must be freed with #ikarus_free.
/// \remark Undefined if the value is undefined.
IKA_API char const * ikarus_text_value_to_string(IkarusTextValue const * value);

/// \brief Checks if two values are equal.
/// \param lhs The left hand side value.
/// \pre \li Must not be null.
/// \param rhs The right hand side value.
/// \pre \li Must not be null.
/// \return True if the values' data are equal, false otherwise.
IKA_API bool ikarus_text_value_is_equal(IkarusTextValue const * lhs, IkarusTextValue const * rhs);

/// \brief Creates a copy of a text value.
/// \param value The value to copy.
/// \pre \li Must not be null.
/// \return The copied value.
/// \remark Must be freed with #ikarus_free.
IKA_API IkarusTextValue * ikarus_text_value_copy(IkarusTextValue const * value);

/// \brief Converts a text value to an entity value.
/// \param value The text value to convert.
/// \pre \li Must not be null.
/// \return The converted entity value.
/// \remark This is the same pointer, so freeing it implies freeing the original value.
IKA_API struct IkarusValue * ikarus_text_value_to_value(IkarusTextValue * value);

/// \see ikarus_toggle_value_to_value
IKA_API struct IkarusValue const * ikarus_text_value_to_value_const(IkarusTextValue const * value);

IKARUS_END_HEADER

/// @}