#pragma once

#include <defines.h>
#include <math/math_types.h>
#include <strings/kname.h>

#include "audio/kaudio_types.h"
#include "core_audio_types.h"

/**
 * The maximum number of individually-controlled channels of audio available, each
 * with separate volume control. These are all nested under a master audio volume.
 */
#define AUDIO_CHANNEL_MAX_COUNT 16

struct kaudio_system_state;
struct frame_data;

typedef u16 kaudio_emitter;
#define KAUDIO_EMITTER_INVALID INVALID_ID_U16

b8 kaudio_system_initialize (u64 *memory_requirement, void *memory, const char *config_str);
void kaudio_system_shutdown (struct kaudio_system_state *state);

/**
 * @brief Updates the audio system. Should happen once an update cycle.
 */
b8 kaudio_system_update (struct kaudio_system_state *state, struct frame_data *p_frame_data);

// To be invoked by the audio plugin when a non-looping audio has completed play.
// Should not be called anywhere except by the plugin.
KAPI void _kaudio_system_play_completed (struct kaudio_system_state *state, kaudio audio, u16 instance_id);

/**
 * Sets the orientation of the listener. Typically linked to the current camera in the world.
 * @param position The position of the listener.
 * @param forward The listener's forward vector.
 * @param up The listener's up vector.
 * @return True on success; otherwise false.
 */
KAPI void kaudio_system_listener_orientation_set (struct kaudio_system_state *state, vec3 position, vec3 forward, vec3 up);

KAPI void kaudio_master_volume_set (struct kaudio_system_state *state, f32 volume);
KAPI f32 kaudio_system_master_volume_get (struct kaudio_system_state *state);

// Preloads audio only, does not create instance.
KAPI kaudio kaudio_preload (struct kaudio_system_state *state, kname asset_name, b8 is_streaming);
KAPI kaudio kaudio_preload_from_package (struct kaudio_system_state *state, kname asset_name, kname package_name, b8 is_streaming);
KAPI kaudio_instance kaudio_acquire_from_base (struct kaudio_system_state *state, kaudio base, kaudio_space audio_space);
KAPI kaudio_instance kaudio_acquire (struct kaudio_system_state *state, kname asset_name, b8 is_streaming, kaudio_space audio_space);
KAPI kaudio_instance kaudio_acquire_from_package (struct kaudio_system_state *state, kname asset_name, kname package_name, b8 is_streaming, kaudio_space audio_space);
KAPI void kaudio_release (struct kaudio_system_state *state, kaudio_instance *instance);

KAPI vec3 kaudio_position_get (struct kaudio_system_state *state, kaudio_instance instance);
KAPI b8 kaudio_position_set (struct kaudio_system_state *state, kaudio_instance instance, vec3 position);
KAPI f32 kaudio_inner_radius_get (struct kaudio_system_state *state, kaudio_instance instance);
KAPI b8 kaudio_inner_radius_set (struct kaudio_system_state *state, kaudio_instance instance, f32 inner_radius);
KAPI f32 kaudio_outer_radius_get (struct kaudio_system_state *state, kaudio_instance instance);
KAPI b8 kaudio_outer_radius_set (struct kaudio_system_state *state, kaudio_instance instance, f32 outer_radius);
KAPI f32 kaudio_falloff_get (struct kaudio_system_state *state, kaudio_instance instance);
KAPI b8 kaudio_falloff_set (struct kaudio_system_state *state, kaudio_instance instance, f32 falloff);

KAPI i8 kaudio_category_id_get (struct kaudio_system_state *state, kname name);
KAPI b8 kaudio_play_in_category_by_name (struct kaudio_system_state *state, kaudio_instance instance, kname category_name);
KAPI b8 kaudio_play_in_category (struct kaudio_system_state *state, kaudio_instance instance, u8 category_index);
KAPI b8 kaudio_play (struct kaudio_system_state *state, kaudio_instance instance, i8 channel_index);
KAPI b8 kaudio_stop (struct kaudio_system_state *state, kaudio_instance instance);
KAPI b8 kaudio_pause (struct kaudio_system_state *state, kaudio_instance instance);
KAPI b8 kaudio_resume (struct kaudio_system_state *state, kaudio_instance instance);
KAPI b8 kaudio_is_valid (struct kaudio_system_state *state, kaudio_instance instance);
KAPI f32 kaudio_pitch_get (struct kaudio_system_state *state, kaudio_instance instance);
KAPI b8 kaudio_pitch_set (struct kaudio_system_state *state, kaudio_instance instance, f32 pitch);
KAPI f32 kaudio_volume_get (struct kaudio_system_state *state, kaudio_instance instance);
KAPI b8 kaudio_volume_set (struct kaudio_system_state *state, kaudio_instance instance, f32 volume);
KAPI b8 kaudio_looping_get (struct kaudio_system_state *state, kaudio_instance instance);
KAPI b8 kaudio_looping_set (struct kaudio_system_state *state, kaudio_instance instance, b8 looping);

// KAPI b8 kaudio_seek(struct kaudio_system_state* state, audio_instance instance, f32 seconds);
// KAPI f32 kaudio_time_played_get(struct kaudio_system_state* state, audio_instance instance);
// KAPI f32 kaudio_time_length_get(struct kaudio_system_state* state, audio_instance instance);

KAPI b8 kaudio_channel_play (struct kaudio_system_state *state, u8 channel_index);
KAPI b8 kaudio_channel_pause (struct kaudio_system_state *state, u8 channel_index);
KAPI b8 kaudio_channel_resume (struct kaudio_system_state *state, u8 channel_index);
KAPI b8 kaudio_channel_stop (struct kaudio_system_state *state, u8 channel_index);
KAPI b8 kaudio_channel_is_playing (struct kaudio_system_state *state, u8 channel_index);
KAPI b8 kaudio_channel_is_paused (struct kaudio_system_state *state, u8 channel_index);
KAPI b8 kaudio_channel_is_stopped (struct kaudio_system_state *state, u8 channel_index);
KAPI b8 kaudio_channel_looping_get (struct kaudio_system_state *state, u8 channel_index);
KAPI b8 kaudio_channel_looping_set (struct kaudio_system_state *state, u8 channel_index, b8 looping);

/**
 * @brief Queries the given channel's volume volume.
 *
 * @param state A pointer to the sound system state.
 * @param channel_index The id of the channel to query.
 * @return The channel's volume.
 */
KAPI f32 kaudio_channel_volume_get (struct kaudio_system_state *state, u8 channel_index);

/**
 * @brief Sets the volume for the given channel id.
 *
 * @param state A pointer to the sound system state.
 * @param channel_index The index of the channel to adjust volume for.
 * @volume The volume to set. Clamped to a range of [0.0-1.0].
 */
KAPI b8 kaudio_channel_volume_set (struct kaudio_system_state *state, u8 channel_index, f32 volume);

KAPI b8 kaudio_emitter_create (struct kaudio_system_state *state, f32 inner_radius, f32 outer_radius, f32 volume, f32 falloff, b8 is_looping, b8 is_streaming, kname audio_resource_name, kname package_name, kaudio_emitter *out_emitter);

KAPI b8 kaudio_emitter_destroy (struct kaudio_system_state *state, kaudio_emitter *emitter);

KAPI b8 kaudio_emitter_world_position_set (struct kaudio_system_state *state, kaudio_emitter emitter_handle, vec3 world_position);