/*
 * Schism Tracker - a cross-platform Impulse Tracker clone
 * copyright (c) 2003-2005 Storlek <storlek@rigelseven.com>
 * copyright (c) 2005-2008 Mrs. Brisby <mrs.brisby@nimh.org>
 * copyright (c) 2009 Storlek & Mrs. Brisby
 * copyright (c) 2010-2012 Storlek
 * URL: http://schismtracker.org/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "headers.h"

#include "it.h"
#include "song.h"
#include "page.h"
#include "osdefs.h"
#include "sdlmain.h"

#include "disko.h"

#define VOLUME_SCALE    31

/* this page will be the first against the wall when the revolution comes */

/* --------------------------------------------------------------------- */
/* statics */

static struct widget widgets_preferences[48];

static const char *interpolation_modes[] = {
        "Non-Interpolated", "Linear",
        "Cubic Spline", "8-Tap FIR Filter", NULL
};

static const int interp_group[] = {
        2,3,4,5,-1,
};
static int ramp_group[] = { /* not const because it is modified */
        -1,-1,-1,
};

/* --------------------------------------------------------------------- */

static void preferences_draw_const(void)
{
        char buf[80];
        int i;

        draw_text("Master Volume Left", 2, 14, 0, 2);
        draw_text("Master Volume Right", 2, 15, 0, 2);
        draw_box(21, 13, 27, 16, BOX_THIN | BOX_INNER | BOX_INSET);

        sprintf(buf, "Mixing Mode, Playback Frequency: %dHz", audio_settings.sample_rate);
        draw_text(buf, 2, 18, 0, 2);

        for (i = 0; interpolation_modes[i]; i++);

        draw_text("Output Equalizer", 2, 21+i*3, 0, 2);
        draw_text(     "Low Frequency Band", 7, 23+i*3, 0, 2);
        draw_text( "Med Low Frequency Band", 3, 24+i*3, 0, 2);
        draw_text("Med High Frequency Band", 2, 25+i*3, 0, 2);
        draw_text(    "High Frequency Band", 6, 26+i*3, 0, 2);

        draw_text("Ramp volume at start of sample",2,29+i*3,0,2);

        draw_box(25, 22+i*3, 47, 27+i*3, BOX_THIN | BOX_INNER | BOX_INSET);
        draw_box(52, 22+i*3, 74, 27+i*3, BOX_THIN | BOX_INNER | BOX_INSET);

        draw_text("Oversampling", 57, 25, 0, 2);
        draw_text("Noise Reduction", 54, 26, 0, 2);

        draw_fill_chars(73, 24, 77, 26, 0);
        draw_box(69, 24, 78, 27,  BOX_THIN | BOX_INNER | BOX_INSET);

#define CORNER_BOTTOM "http://schismtracker.org/"
        draw_text(CORNER_BOTTOM, 78 - strlen(CORNER_BOTTOM), 48, 1, 2);
}

/* --------------------------------------------------------------------- */

static void preferences_set_page(void)
{
        int i, j;
        int lim = volume_get_max();
        volume_read(&i, &j);
        widgets_preferences[0].d.thumbbar.value = i * VOLUME_SCALE / lim;
        widgets_preferences[1].d.thumbbar.value = j * VOLUME_SCALE / lim;

        for (i = j = 0; interpolation_modes[i]; i++) {
                if (i == audio_settings.interpolation_mode) {
                        widgets_preferences[i + 2].d.togglebutton.state=1;
                        j = 1;
                } else {
                        widgets_preferences[i + 2].d.togglebutton.state=0;
                }
        }
        if (!j) {
                audio_settings.interpolation_mode = 0;
                widgets_preferences[2].d.togglebutton.state=1;
        }

        for (j = 0; j < 4; j++) {
                widgets_preferences[i+2+(j*2)].d.thumbbar.value
                                                = audio_settings.eq_freq[j];
                widgets_preferences[i+3+(j*2)].d.thumbbar.value
                                                = audio_settings.eq_gain[j];
        }

        widgets_preferences[i+10].d.togglebutton.state
                                = audio_settings.no_ramping?0:1;
        widgets_preferences[i+11].d.togglebutton.state
                                = audio_settings.no_ramping?1:0;
        widgets_preferences[i+13].d.toggle.state = audio_settings.oversampling;
        widgets_preferences[i+14].d.toggle.state = audio_settings.noise_reduction;
}

/* --------------------------------------------------------------------- */

static void change_volume(void)
{
        int lim = volume_get_max();
        volume_write(
                widgets_preferences[0].d.thumbbar.value * lim / VOLUME_SCALE,
                widgets_preferences[1].d.thumbbar.value * lim / VOLUME_SCALE);
}

#define SAVED_AT_EXIT "Audio configuration will be saved at exit"

static void change_eq(void)
{
        int i,j;
        for (i = 0; interpolation_modes[i]; i++);
        for (j = 0; j < 4; j++) {
                audio_settings.eq_freq[j] = widgets_preferences[i+2+(j*2)].d.thumbbar.value;
                audio_settings.eq_gain[j] = widgets_preferences[i+3+(j*2)].d.thumbbar.value;
        }
        song_init_eq(1);
}


static void change_mixer(void)
{
        int i;
        for (i = 0; interpolation_modes[i]; i++) {
                if (widgets_preferences[2+i].d.togglebutton.state) {
                        audio_settings.interpolation_mode = i;
                }
        }
        audio_settings.oversampling = widgets_preferences[i+13].d.toggle.state;
        audio_settings.noise_reduction = widgets_preferences[i+14].d.toggle.state;
        audio_settings.no_ramping = widgets_preferences[i+11].d.togglebutton.state;

        song_init_modplug();
        status_text_flash(SAVED_AT_EXIT);
}

/* --------------------------------------------------------------------- */
static void save_config_now(UNUSED void *ign)
{
        /* TODO */
        cfg_midipage_save(); /* what is this doing here? */
        cfg_atexit_save();
        status_text_flash("Configuration saved");
}

void preferences_load_page(struct page *page)
{
        char buf[64];
        char *ptr;
        int i, j, n;

        page->title = "Preferences (Shift-F5)";
        page->draw_const = preferences_draw_const;
        page->set_page = preferences_set_page;
        page->total_widgets = 15;
        page->widgets = widgets_preferences;
        page->help_index = HELP_GLOBAL;


        create_thumbbar(widgets_preferences + 0, 22, 14, 5, 0, 1, 1, change_volume, 0, VOLUME_SCALE);
        create_thumbbar(widgets_preferences + 1, 22, 15, 5, 0, 2, 2, change_volume, 0, VOLUME_SCALE);

        for (n = 0; interpolation_modes[n]; n++);
        for (i = 0; interpolation_modes[i]; i++) {

                sprintf(buf, "%d Bit, %s", audio_settings.bits, interpolation_modes[i]);
                ptr = str_dup(buf);
                create_togglebutton(widgets_preferences+i+2,
                                        6, 20 + (i * 3), 26,
                                        i+1, i+3, i+2, n+11, i+3,
                                        change_mixer,
                                        ptr,
                                        2,
                                        interp_group);
                page->total_widgets++;
        }

        for (j = 0; j < 4; j++) {
                n = i+(j*2);
                if (j == 0) n = i+1;
                create_thumbbar(widgets_preferences+i+2+(j*2),
                                                26, 23+(i*3)+j,
                                                21,
                                                n, i+(j*2)+4, i+(j*2)+3,
                                                change_eq,
                                                0, 127);
                n = i+(j*2)+5;
                if (j == 3) n--;
                create_thumbbar(widgets_preferences+i+3+(j*2),
                                                53, 23+(i*3)+j,
                                                21,
                                                i+(j*2)+1, n, i+(j*2)+4,
                                                change_eq,
                                                0, 127);
        }
        /* default EQ setting */
        widgets_preferences[i+2].d.thumbbar.value = 0;
        widgets_preferences[i+4].d.thumbbar.value = 16;
        widgets_preferences[i+6].d.thumbbar.value = 96;
        widgets_preferences[i+8].d.thumbbar.value = 127;

        ramp_group[0] = i+10;
        ramp_group[1] = i+11;
        create_togglebutton(widgets_preferences+i+10,
                        33,29+i*3,9,
                        i+9,i+12,i+10,i+11,i+11,
                        change_mixer,
                        "Enabled",2,
                        ramp_group);

        create_togglebutton(widgets_preferences+i+11,
                        46,29+i*3,9,
                        i+9,i+12,i+10,i+13,i+13,
                        change_mixer,
                        "Disabled",1,
                        ramp_group);

        create_button(widgets_preferences+i+12,
                        2, 44, 27,
                        i+10, i+12, i+12, i+13, i+13,
                        (void *) save_config_now,
                        "Save Output Configuration", 2);

        create_toggle(widgets_preferences+i+13, /* Oversampling */
                        70, 25,
                        i+13,i+14,1+i, i+13,i+14,
                        change_mixer);
        create_toggle(widgets_preferences+i+14, /* Noise Reduction */
                        70, 26,
                        i+13,i+15,1+i, i+14,i+15,
                        change_mixer);
}

