#ifndef MIDI_H
#define MIDI_H

#ifndef _WIN32
#  define _POSIX_C_SOURCE 200809L
#  include <alsa/asoundlib.h>
#endif

#include <stdatomic.h>
#include "synth.h"

#define MIDI_MAX_INPUTS 16

typedef struct {
    int    active;
    float *valuePtr;   // direct pointer into Synth for CC to write
    float  min, max;   // CC 0 → min, CC 127 → max
    int    controlId;  // stable UI control ID, used for persistence
} CcMapping;

typedef struct {
    int  client;
    int  port;
    char clientName[64];
    char portName[64];
} MidiInputInfo;

typedef struct {
#ifdef _WIN32
    void     *hMidiIn;  // HMIDIIN; kept opaque to avoid including windows.h here
#else
    snd_seq_t *seq;
    int        port;
    int        client;
#endif
    Synth        *synth;
    int           connectedClient;  // WinMM device index on Windows, ALSA client on Linux; -1 if not connected
    int           connectedPort;    // always 0 on Windows, ALSA port on Linux
    MidiInputInfo inputs[MIDI_MAX_INPUTS];
    int           inputCount;
    atomic_int    midiLearnMode;   // 1 while waiting for CC wiggle
    atomic_int    midiLearnCC;     // -1 or the CC number received
    CcMapping     ccMappings[128];
} MidiState;

int  midiInit(MidiState *m, Synth *synth);
void midiScanInputs(MidiState *m);
void midiDevConnect(MidiState *m, int srcClient, int srcPort);
void midiDevDisconnect(MidiState *m);
void midiClose(MidiState *m);
void *midiThread(void *arg);

#endif