/* entry.c - boot entry
 *
 * Copyright (C) 2007, 2008 Red Hat, Inc.
 *
 * 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, 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.
 *
 * Written by: Ray Strode <rstrode@redhat.com>
 */

#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <values.h>
#include <unistd.h>
#include <wchar.h>

#include "ply-entry.h"
#include "ply-event-loop.h"
#include "ply-array.h"
#include "ply-label.h"
#include "ply-logger.h"
#include "ply-image.h"
#include "ply-pixel-buffer.h"
#include "ply-pixel-display.h"
#include "ply-utils.h"

#include <linux/kd.h>

#ifndef FRAMES_PER_SECOND
#define FRAMES_PER_SECOND 30
#endif

struct _ply_entry
{
        ply_event_loop_t    *loop;

        ply_pixel_display_t *display;
        ply_rectangle_t      area;
        ply_image_t         *text_field_image;
        ply_image_t         *bullet_image;
        ply_label_t         *label;

        char                *text;
        int                  number_of_bullets;
        int                  max_number_of_visible_bullets;

        uint32_t             is_hidden : 1;
        uint32_t             is_password : 1;
};

ply_entry_t *
ply_entry_new (const char *image_dir)
{
        ply_entry_t *entry;
        char *image_path;

        assert (image_dir != NULL);

        entry = calloc (1, sizeof(ply_entry_t));

        image_path = NULL;
        asprintf (&image_path, "%s/entry.png", image_dir);
        entry->text_field_image = ply_image_new (image_path);
        free (image_path);

        image_path = NULL;
        asprintf (&image_path, "%s/bullet.png", image_dir);
        entry->bullet_image = ply_image_new (image_path);
        free (image_path);
        entry->label = ply_label_new ();
        ply_label_set_color (entry->label, 0, 0, 0, 1);

        entry->number_of_bullets = 0;
        entry->text = strdup ("");

        entry->is_hidden = true;
        entry->is_password = true;

        return entry;
}

void
ply_entry_free (ply_entry_t *entry)
{
        if (entry == NULL)
                return;
        ply_image_free (entry->text_field_image);
        ply_image_free (entry->bullet_image);
        ply_label_free (entry->label);
        free (entry->text);

        free (entry);
}

static int
get_max_number_of_visible_bullets (ply_entry_t *entry)
{
        long bullet_width, text_field_width;

        bullet_width = ply_image_get_width (entry->bullet_image);
        text_field_width = ply_image_get_width (entry->text_field_image);

        return (int) (text_field_width / bullet_width) - ((text_field_width % bullet_width) < (bullet_width / 2) ? 1 : 0);
}

bool
ply_entry_load (ply_entry_t *entry)
{
        if (!ply_image_load (entry->text_field_image))
                return false;

        if (!ply_image_load (entry->bullet_image))
                return false;

        entry->area.width = ply_image_get_width (entry->text_field_image);
        entry->area.height = ply_image_get_height (entry->text_field_image);

        entry->max_number_of_visible_bullets = get_max_number_of_visible_bullets (entry);

        return true;
}

static void
ply_entry_draw (ply_entry_t *entry)
{
        if (entry->is_hidden)
                return;

        ply_pixel_display_draw_area (entry->display,
                                     entry->area.x,
                                     entry->area.y,
                                     entry->area.width,
                                     entry->area.height);
}

void
ply_entry_draw_area (ply_entry_t        *entry,
                     ply_pixel_buffer_t *pixel_buffer,
                     long                x,
                     long                y,
                     unsigned long       width,
                     unsigned long       height)
{
        ply_rectangle_t bullet_area;
        ply_rectangle_t clip_area;
        ply_pixel_buffer_t *bullet_buffer, *text_field_buffer;
        int i, number_of_visible_bullets;

        if (entry->is_hidden)
                return;

        text_field_buffer = ply_image_get_buffer (entry->text_field_image);

        ply_pixel_buffer_fill_with_buffer (pixel_buffer,
                                           text_field_buffer,
                                           entry->area.x,
                                           entry->area.y);

        if (entry->is_password) {
                bullet_buffer = ply_image_get_buffer (entry->bullet_image);
                ply_pixel_buffer_get_size (bullet_buffer, &bullet_area);

                if (entry->number_of_bullets <= entry->max_number_of_visible_bullets) {
                        number_of_visible_bullets = entry->number_of_bullets;
                } else {
                        number_of_visible_bullets = entry->max_number_of_visible_bullets;

                        /* We've got more bullets than we can show in the available space, so
                         * draw a little half bullet to indicate some bullets are offscreen
                         */
                        bullet_area.x = entry->area.x - bullet_area.width / 2.0;
                        bullet_area.y = entry->area.y + entry->area.height / 2.0 - bullet_area.height / 2.0;
                        clip_area = bullet_area;
                        clip_area.x = entry->area.x;

                        ply_pixel_buffer_fill_with_buffer_with_clip (pixel_buffer,
                                                                     bullet_buffer,
                                                                     bullet_area.x,
                                                                     bullet_area.y,
                                                                     &clip_area);
                }

                for (i = 0; i < number_of_visible_bullets; i++) {
                        bullet_area.x = entry->area.x + i * bullet_area.width + bullet_area.width / 2.0;
                        bullet_area.y = entry->area.y + entry->area.height / 2.0 - bullet_area.height / 2.0;

                        ply_pixel_buffer_fill_with_buffer (pixel_buffer,
                                                           bullet_buffer,
                                                           bullet_area.x,
                                                           bullet_area.y);
                }
        } else {
                ply_label_set_text (entry->label, entry->text);
                ply_label_show (entry->label,
                                NULL,
                                entry->area.x,
                                entry->area.y + entry->area.height / 2
                                - ply_label_get_height (entry->label) / 2);
                ply_label_draw_area (entry->label, pixel_buffer,
                                     entry->area.x, entry->area.y,
                                     entry->area.width, entry->area.height);
        }
}

void
ply_entry_set_bullet_count (ply_entry_t *entry,
                            int          count)
{
        count = MAX (0, count);
        if (!entry->is_password || entry->number_of_bullets != count) {
                entry->is_password = true;
                entry->number_of_bullets = count;
                ply_entry_draw (entry);
        }
}

int
ply_entry_get_bullet_count (ply_entry_t *entry)
{
        return entry->number_of_bullets;
}

void
ply_entry_add_bullet (ply_entry_t *entry)
{
        ply_entry_set_bullet_count (entry, ply_entry_get_bullet_count (entry) + 1);
}

void
ply_entry_remove_bullet (ply_entry_t *entry)
{
        ply_entry_set_bullet_count (entry, ply_entry_get_bullet_count (entry) - 1);
}

void
ply_entry_remove_all_bullets (ply_entry_t *entry)
{
        ply_entry_set_bullet_count (entry, 0);
}

void
ply_entry_set_text (ply_entry_t *entry,
                    const char  *text)
{
        if (entry->is_password || strcmp (entry->text, text) != 0) {
                entry->is_password = false;
                free (entry->text);
                entry->text = strdup (text);
                ply_entry_draw (entry);
        }
}

void
ply_entry_set_text_color (ply_entry_t *entry,
                          float        red,
                          float        green,
                          float        blue,
                          float        alpha)
{
        ply_label_set_color (entry->label, red, green, blue, alpha);
}


void
ply_entry_show (ply_entry_t         *entry,
                ply_event_loop_t    *loop,
                ply_pixel_display_t *display,
                long                 x,
                long                 y)
{
        assert (entry != NULL);
        assert (entry->loop == NULL);

        entry->loop = loop;
        entry->display = display;

        entry->area.x = x;
        entry->area.y = y;

        entry->is_hidden = false;

        ply_entry_draw (entry);
}

void
ply_entry_hide (ply_entry_t *entry)
{
        entry->is_hidden = true;
        ply_entry_draw (entry);

        entry->display = NULL;
        entry->loop = NULL;
}

bool
ply_entry_is_hidden (ply_entry_t *entry)
{
        return entry->is_hidden;
}

long
ply_entry_get_width (ply_entry_t *entry)
{
        return entry->area.width;
}

long
ply_entry_get_height (ply_entry_t *entry)
{
        return entry->area.height;
}