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

static Settings settings = {0};
static int settings_cursor_loc = 0;

void
draw_settings_cursor(void) {
    int x = 6;
    int y = 17 + settings_cursor_loc * 12;
    draw_line(x + 1, y + 3, x + 1, y + 7, COL_ACC_0);
    draw_line(x + 2, y + 4, x + 2, y + 6, COL_ACC_0);
    draw_line(x + 3, y + 5, x + 3, y + 5, COL_ACC_0);
}

void serial_irq(void);
void stop_sound(void);
void toggle_playing(void);

void
set_audio_settings(void) {
    stop_sound();
    if (settings.sync == SYNC_IN_LINK) {
        irs_set(IRQ_SERIAL, serial_irq);
        irs_set(IRQ_TIMER_2, 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_LINK_AUDIO_4:
        case SYNC_OUT_LINK_AUDIO_8:
        case SYNC_OUT_LINK_AUDIO_16:
        case SYNC_OUT_AUDIO_4:
        case SYNC_OUT_AUDIO_8:
        case SYNC_OUT_AUDIO_16: {
            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_tap(KEY_DOWN)) {
        if (settings_cursor_loc == (N_SETTINGS - 1)) {
            settings_cursor_loc = 0;
        } else {
            settings_cursor_loc++;
        }
        clear_screen = true;
    }
    if (key_tap(KEY_UP)) {
        if (settings_cursor_loc == 0) {
            settings_cursor_loc = N_SETTINGS - 1;
        } else {
            settings_cursor_loc--;
        }
        clear_screen = true;
    }
    if (key_tap(KEY_R)) {
        switch (settings_cursor_loc) {
            case 0: {
                if ((settings.sync + 1) >= SYNC_NUM) {
                    settings.sync = 0;
                } else {
                    settings.sync++;
                }
                set_audio_settings();
            } break;
            case 1: {
                if ((settings.theme + 1) >= THEME_NUM) {
                    settings.theme = 0;
                } else {
                    settings.theme++;
                }
                swap_palette(settings.theme);
            } break;
            case 2: {
                if ((settings.cursor + 1) >= CURSOR_NUM) {
                    settings.cursor = 0;
                } else {
                    settings.cursor++;
                }
            } break;
        }
        save_metadata();
        clear_screen = true;
    }
    if (key_tap(KEY_L)) {
        switch (settings_cursor_loc) {
            case 0: {
                if (settings.sync == 0) {
                    settings.sync = SYNC_NUM - 1;
                } else {
                    settings.sync--;
                }
                set_audio_settings();
            } break;
            case 1: {
                if (settings.theme == 0) {
                    settings.theme = THEME_NUM - 1;
                } else {
                    settings.theme--;
                }
                swap_palette(settings.theme);
            } break;
            case 2: {
                if (settings.cursor == 0) {
                    settings.cursor = CURSOR_NUM - 1;
                } else {
                    settings.cursor--;
                }
            } break;
        }
        save_metadata();
        clear_screen = true;
    }
    if (key_tap(KEY_A)) {
        next_scene = SCENE_SEQUENCER;
    }
    if (key_tap(KEY_START)) {
        toggle_playing();
    }
}