#ifndef CHANNEL_H
#define CHANNEL_H

// cppcheck-suppress missingIncludeSystem
#include <jack/jack.h>
#include <stdatomic.h>

#define LOOP_BUF_SIZE  (5 * 48000)

#define MAX_MIDI_EVENTS 1024

#define MAX_SCENES 16

typedef enum {
    CHANNEL_AUDIO,
    CHANNEL_MIDI
} channel_type_t;

typedef struct {
    jack_nframes_t timestamp;   /* frame offset relative to loop start */
    unsigned char  status;
    unsigned char  note;
    unsigned char  velocity;
} midi_event_t;

typedef enum {
    STATE_IDLE,
    STATE_RECORD,
    STATE_LOOPING,
    STATE_PAUSED
} looper_state;

typedef struct {
    union {
        float         audio_buffer[LOOP_BUF_SIZE];
        midi_event_t  midi_events[MAX_MIDI_EVENTS];
    } loop;
    atomic_int    loop_count;
    atomic_int    record_pos;
    atomic_int    playback_pos;
    atomic_int    state;
    atomic_int    prev_state;
} scene_t;

struct channel_t {
    channel_type_t type;
    atomic_int    active;
    jack_port_t  *audio_in;
    jack_port_t  *audio_out;
    jack_port_t  *midi_in;
    jack_port_t  *midi_out;
    scene_t       scenes[MAX_SCENES];
    atomic_int    scene_count;
    atomic_int    current_scene;
};

/* Globals declared in looper.c */
extern struct channel_t *_Atomic channels;
extern atomic_int  channel_capacity;
extern atomic_int  channel_count;
extern int         next_channel_id;

/* Safe accessor for the real‑time thread (returns a snapshot of the current pointer) */
static inline struct channel_t *get_channels_array(void) {
    return atomic_load(&channels);
}

void channel_add(jack_client_t *client, int idx);
void channel_remove(jack_client_t *client, int idx);
void channel_add_midi(jack_client_t *client, int idx);

/* Scene management (called from main loop) */
void channel_add_scene(jack_client_t *client, int idx);
void channel_remove_scene(jack_client_t *client, int idx);
void channel_next_scene(jack_client_t *client, int idx);
void channel_prev_scene(jack_client_t *client, int idx);

#endif