#ifndef _XAS_SEQ_H
#define _XAS_SEQ_H

#include <sys/types.h>
#include <sys/time.h>

#include <xas/audio.h>
#include <xas/synth.h>
#include <xas/spatial.h>

enum xas_seq_event_type {
    XAS_SEQ_EVENT_SET_POSITION,
    XAS_SEQ_EVENT_SET_HEADING,
    XAS_SEQ_EVENT_SET_SPEED,
    XAS_SEQ_EVENT_SET_GAIN,
    XAS_SEQ_EVENT_SET_FREQUENCY,
    XAS_SEQ_EVENT_SET_TYPE,
    XAS_SEQ_EVENT_SET_ENTRY,
    XAS_SEQ_EVENT_SET_FLAGS,
    XAS_SEQ_EVENT_SPEECH,
    XAS_SEQ_EVENT_OFF,
    XAS_SEQ_EVENT_ON,
    XAS_SEQ_EVENT_STOP
};

typedef struct _xas_seq_event xas_seq_event;

struct _xas_seq_event {
    enum xas_seq_event_type type;

    xas_object *object;

    struct timeval timestamp;
    size_t index;

    union {
        xas_spatial_coord point;
        xas_spatial_coord heading;
        float speed;
        float gain;
        int flags;
        int value;
        size_t entry;
        size_t frequency;
        const char *phrase;
    };

    xas_seq_event *next;
};

typedef struct _xas_seq {
    xas_spatial_scene *scene;

    xas_seq_event *first,
                    *last;

    size_t buffer_size;
} xas_seq;

xas_seq *xas_seq_new(xas_spatial_scene *scene, size_t buffer_size);

void xas_seq_destroy(xas_seq *seq);

int xas_seq_add_event_off(xas_seq *seq,
                            xas_object *object,
                            struct timeval timestamp,
                            size_t index);

int xas_seq_add_event_on(xas_seq *seq,
                           xas_object *object,
                           struct timeval timestamp,
                           size_t index);

int xas_seq_add_set_position(xas_seq *seq,
                               xas_object *object,
                               struct timeval timestamp,
                               xas_spatial_coord point);

int xas_seq_add_set_heading(xas_seq *seq,
                              xas_object *object,
                              struct timeval timestamp,
                              xas_spatial_coord heading);

int xas_seq_add_set_speed(xas_seq *seq,
                            xas_object *object,
                            struct timeval timestamp,
                            float speed);

int xas_seq_add_set_type(xas_seq *seq,
                           xas_object *object,
                           struct timeval timestamp,
                           size_t index,
                           int type);

int xas_seq_add_set_gain(xas_seq *seq,
                           xas_object *object,
                           struct timeval timestamp,
                           float gain);

int xas_seq_add_set_entry(xas_seq *seq,
                            xas_object *object,
                            struct timeval timestamp,
                            size_t index,
                            size_t entry);

int xas_seq_add_set_flags(xas_seq *seq,
                            xas_object *object,
                            struct timeval timestamp,
                            size_t index,
                            int flags);

int xas_seq_add_set_type(xas_seq *seq,
                           xas_object *object,
                           struct timeval timestamp,
                           size_t index,
                           int type);

int xas_seq_add_set_frequency(xas_seq *seq,
                                xas_object *object,
                                struct timeval timestamp,
                                size_t index,
                                size_t frequency);

int xas_seq_add_phrase(xas_seq *seq,
                         xas_object *object,
                         struct timeval timestamp,
                         const char *phrase);

int xas_seq_add_stop(xas_seq *seq,
                       struct timeval timestamp);

int xas_seq_play(xas_seq *seq, xas_audio_stream *sink);

#endif /* _XAS_SEQ_H */