#include "settings.h"
#include "save.h"

static Settings settings = {
    .bpm = 90,
    .auto_save = TOGGLE_ON,
    .help = TOGGLE_ON,
};
static int settings_cursor_loc = 0;

void sync_in_96(void);
void sync_in_48(void);
void sync_in_24(void);
void sync_in_12(void);
void sync_in_6(void);
void sync_in_4(void);
void reset_sequencer(void);
void toggle_playing(void);
void stop_playing(void);

static int sync_ticks = 0;

void
set_audio_settings(void) {
    if (settings.sync == SYNC_IN_LINK_96BPQ ||
            settings.sync == SYNC_IN_LINK_48BPQ ||
            settings.sync == SYNC_IN_LINK_24BPQ ||
            settings.sync == SYNC_IN_LINK_12BPQ ||
            settings.sync == SYNC_IN_LINK_6BPQ ||
            settings.sync == SYNC_IN_LINK_4BPQ) {
        switch (settings.sync) {
            case SYNC_IN_LINK_96BPQ: { irs_set(IRQ_SERIAL, sync_in_96); } break;
            case SYNC_IN_LINK_48BPQ: { irs_set(IRQ_SERIAL, sync_in_48); } break;
            case SYNC_IN_LINK_24BPQ: { irs_set(IRQ_SERIAL, sync_in_24); } break;
            case SYNC_IN_LINK_12BPQ: { irs_set(IRQ_SERIAL, sync_in_12); } break;
            case SYNC_IN_LINK_6BPQ: { irs_set(IRQ_SERIAL, sync_in_6); } break;
            case SYNC_IN_LINK_4BPQ: { irs_set(IRQ_SERIAL, sync_in_4); } break;
            default: break;
        }
        irs_set(IRQ_TIMER_3, NULL);
        SIO_MODE = SIO_MODE_GP
            | SIO_SC_OUT(0)
            | SIO_SD_OUT(0)
            | SIO_SI_OUT(0)
            | SIO_SO_OUT(0)
            | SIO_IRQ_ENABLE;
    } else {
        irs_set(IRQ_SERIAL, NULL);
    }
    switch (settings.sync) {
        case SYNC_OUT_AUDIO_12BPQ:
        case SYNC_OUT_AUDIO_6BPQ:
        case SYNC_OUT_AUDIO_4BPQ:
        case SYNC_OUT_AUDIO_2BPQ:
        case SYNC_OUT_LINK_AUDIO_12BPQ:
        case SYNC_OUT_LINK_AUDIO_6BPQ:
        case SYNC_OUT_LINK_AUDIO_4BPQ:
        case SYNC_OUT_LINK_AUDIO_2BPQ: {
            SOUND_DMG_MASTER = sound_volume(SOUND_SQUARE1
                    | SOUND_SQUARE2
                    | SOUND_WAVE
                    | SOUND_NOISE, 3, 2);
            SOUND_DSOUND_MASTER =
                    SOUND_DMG100
                    | SOUND_DSOUND_RATIO_A
                    | SOUND_DSOUND_LEFT_A
                    | SOUND_DSOUND_RESET_A;
        } break;
        default: {
            SOUND_DMG_MASTER = sound_volume(SOUND_SQUARE1
                    | SOUND_SQUARE2
                    | SOUND_WAVE
                    | SOUND_NOISE, 3, 0);
            SOUND_DSOUND_MASTER = SOUND_DMG100;
        } break;
    }
}

void
handle_settings_input(void) {
    if (key_retrig(KEY_DOWN)) {
        if (settings_cursor_loc == (SETTINGS_NUM - 1)) {
            settings_cursor_loc = 0;
        } else {
            settings_cursor_loc++;
        }
        clear_screen = true;
    }
    if (key_retrig(KEY_UP)) {
        if (settings_cursor_loc == 0) {
            settings_cursor_loc = SETTINGS_NUM - 1;
        } else {
            settings_cursor_loc--;
        }
        clear_screen = true;
    }
    if (key_retrig(KEY_R)) {
        switch (settings_cursor_loc) {
            case SETTINGS_SYNC: {
                if ((settings.sync + 1) >= SYNC_NUM) {
                    settings.sync = 0;
                } else {
                    settings.sync++;
                }
                stop_playing();
                set_audio_settings();
            } break;
            case SETTINGS_THEME: {
                if ((settings.theme + 1) >= THEME_NUM) {
                    settings.theme = 0;
                } else {
                    settings.theme++;
                }
                swap_palette(settings.theme);
            } break;
            case SETTINGS_GLOBAL_MUTE: {
                if ((settings.global_mute + 1) >= TOGGLE_NUM) {
                    settings.global_mute = 0;
                } else {
                    settings.global_mute++;
                }
            } break;
            case SETTINGS_GLOBAL_BPM: {
                if ((settings.global_bpm + 1) >= TOGGLE_NUM) {
                    settings.global_bpm = 0;
                } else {
                    settings.global_bpm++;
                }
                redraw_bpm = true;
                settings.bpm = patterns[pattern_selection_loc].bpm;
                if (play_status) {
                    update_bpm = true;
                }
            } break;
            case SETTINGS_AUTO_SAVE: {
                if ((settings.auto_save + 1) >= TOGGLE_NUM) {
                    settings.auto_save = 0;
                } else {
                    settings.auto_save++;
                }
            } break;
            case SETTINGS_HELP: {
                if ((settings.help + 1) >= TOGGLE_NUM) {
                    settings.help = 0;
                } else {
                    settings.help++;
                }
            } break;
        }
        save_metadata();
        clear_screen = true;
    }
    if (key_retrig(KEY_L)) {
        switch (settings_cursor_loc) {
            case SETTINGS_SYNC: {
                if (settings.sync == 0) {
                    settings.sync = SYNC_NUM - 1;
                } else {
                    settings.sync--;
                }
                stop_playing();
                set_audio_settings();
            } break;
            case SETTINGS_THEME: {
                if (settings.theme == 0) {
                    settings.theme = THEME_NUM - 1;
                } else {
                    settings.theme--;
                }
                swap_palette(settings.theme);
            } break;
            case SETTINGS_GLOBAL_MUTE: {
                if (settings.global_mute == 0) {
                    settings.global_mute = TOGGLE_NUM - 1;
                } else {
                    settings.global_mute--;
                }
            } break;
            case SETTINGS_GLOBAL_BPM: {
                if (settings.global_bpm == 0) {
                    settings.global_bpm = TOGGLE_NUM - 1;
                } else {
                    settings.global_bpm--;
                }
                redraw_bpm = true;
                settings.bpm = patterns[pattern_selection_loc].bpm;
                if (play_status) {
                    update_bpm = true;
                }
            } break;
            case SETTINGS_AUTO_SAVE: {
                if (settings.auto_save == 0) {
                    settings.auto_save = TOGGLE_NUM - 1;
                } else {
                    settings.auto_save--;
                }
            } break;
            case SETTINGS_HELP: {
                if (settings.help == 0) {
                    settings.help = TOGGLE_NUM - 1;
                } else {
                    settings.help--;
                }
            } break;
        }
        save_metadata();
        clear_screen = true;
    }
    if (key_tap(KEY_A)) {
        next_scene = SCENE_SEQUENCER;
    }
    if (key_tap(KEY_START)) {
        reset_sequencer();
        toggle_playing();
    }
}