//
// Structs.
//

typedef struct TriggerNote {
    bool active;
    Note note;
} TriggerNote;

typedef struct ChannelSquareParams {
    u8 env_volume;
    u8 env_time;
    u8 env_direction;
    u8 duty_cycle;
    u8 sweep_number;
    u8 sweep_time;
    u8 sweep_direction;
    u8 prob;
    s8 pan;
} ChannelSquareParams;

typedef struct ChannelWaveParams {
    u8 wave_volume;
    u8 wave_mode;
    u8 shape_a;
    u8 type_a;
    u8 shape_b;
    u8 type_b;
    u8 prob;
    s8 pan;
} ChannelWaveParams;

typedef struct ChannelNoiseParams {
    u8 env_volume;
    u8 env_time;
    u8 env_direction;
    u8 bit_mode;
    u8 prob;
    s8 pan;
} ChannelNoiseParams;

typedef struct ChannelSquare {
    bool active;
    TriggerNote notes[16];
    ChannelSquareParams params[16];
} ChannelSquare;

typedef struct ChannelWave {
    bool active;
    TriggerNote notes[16];
    ChannelWaveParams params[16];
} ChannelWave;

typedef struct ChannelNoise {
    bool active;
    TriggerNote notes[16];
    ChannelNoiseParams params[16];
} ChannelNoise;

typedef struct Pattern {
    ChannelSquare ch1;
    ChannelSquare ch2;
    ChannelWave ch3;
    ChannelNoise ch4;
    int bpm;
    u8 bank;
} Pattern;

//
// Defaults.
//

const ChannelSquare default_ch1 = {
    .notes = {
        {true, NOTE_C_4},
        {true, NOTE_D_SHARP_4},
        {true, NOTE_G_4},
        {true, NOTE_A_SHARP_4},
        {true, NOTE_C_4},
        {true, NOTE_D_SHARP_4},
        {true, NOTE_G_4},
        {true, NOTE_A_SHARP_4},
        {true, NOTE_C_4},
        {true, NOTE_D_SHARP_4},
        {true, NOTE_G_4},
        {true, NOTE_A_SHARP_4},
        {true, NOTE_C_4},
        {true, NOTE_D_SHARP_4},
        {true, NOTE_G_4},
        {true, NOTE_A_SHARP_4},
    },
    .params = {
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
    },
    .active = true,
};

const ChannelSquare default_ch2 = {
    .notes = {
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
        {true, NOTE_C_3},
    },
    .params = {
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
        {8, 4, 0, 2, 0, 0, 0, PROB_100, 0},
    },
    .active = true,
};

const ChannelWave default_ch3 = {
    .notes = {
        {true, NOTE_C_5},
        {true, NOTE_C_5},
        {true, NOTE_C_5},
        {true, NOTE_A_SHARP_5},
        {true, NOTE_A_SHARP_5},
        {true, NOTE_C_5},
        {true, NOTE_C_5},
        {true, NOTE_G_5},
        {true, NOTE_C_5},
        {true, NOTE_C_5},
        {true, NOTE_C_5},
        {true, NOTE_A_SHARP_5},
        {true, NOTE_A_SHARP_5},
        {true, NOTE_C_5},
        {true, NOTE_C_5},
        {true, NOTE_G_5},
    },
    .params = {
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
        {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0},
    },
    .active = true,
};

const ChannelNoise default_ch4 = {
    .notes = {
        {true, NOTE_D_SHARP_4},
        {false, NOTE_E_6},
        {false, NOTE_E_6},
        {false, NOTE_E_6},
        {true, NOTE_D_SHARP_4},
        {false, NOTE_E_6},
        {false, NOTE_E_6},
        {false, NOTE_E_6},
        {true, NOTE_D_SHARP_4},
        {false, NOTE_E_6},
        {false, NOTE_E_6},
        {false, NOTE_E_6},
        {true, NOTE_D_SHARP_4},
        {false, NOTE_E_6},
        {false, NOTE_E_6},
        {false, NOTE_E_6},
    },
    .params = {
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
        {0xF, 0x2, 0, 0, PROB_100, 0},
    },
    .active = true,
};

const int default_bpm = 90;

static Pattern patterns[8] = {
    {default_ch1, default_ch2, default_ch3, default_ch4, default_bpm, 0},
    {default_ch1, default_ch2, default_ch3, default_ch4, default_bpm, 0},
    {default_ch1, default_ch2, default_ch3, default_ch4, default_bpm, 0},
    {default_ch1, default_ch2, default_ch3, default_ch4, default_bpm, 0},
    {default_ch1, default_ch2, default_ch3, default_ch4, default_bpm, 0},
    {default_ch1, default_ch2, default_ch3, default_ch4, default_bpm, 0},
    {default_ch1, default_ch2, default_ch3, default_ch4, default_bpm, 0},
    {default_ch1, default_ch2, default_ch3, default_ch4, default_bpm, 0},
};

static ChannelSquareParams ch1_params = {8, 4, 0, 2, 0, 0, 0, PROB_100, 0};
static ChannelSquareParams ch2_params = {8, 4, 0, 2, 0, 0, 0, PROB_100, 0};
static ChannelWaveParams ch3_params = {3, 0, WAVE_SIN, 0, WAVE_SAW, 0, PROB_100, 0};
static ChannelNoiseParams ch4_params = {0xF, 0x2, 0, 0, PROB_100, 0};