/*
 * example-font.c -- show how to use fonts
 *
 * Copyright (c) 2020 David Demelier <markand@malikania.fr>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <core/clock.h>
#include <core/event.h>
#include <core/font.h>
#include <core/painter.h>
#include <core/panic.h>
#include <core/sys.h>
#include <core/texture.h>
#include <core/util.h>
#include <core/window.h>

#include <ui/theme.h>

#define W       (1280)
#define H       (720)

/* Friendly taken from: https://lospec.com/palette-list/apollo */
static const unsigned long colors[] = {
	0x3c5e8bff,     /* Blue. */
	0x468232ff,     /* Green. */
	0xad7757ff,     /* Light brown. */
	0x884b2bff,     /* Brown. */
	0x752438ff,     /* Red. */
	0x7a367bff,     /* Magenta. */
	0x151d28ff,     /* Dark */
	0xc7cfccff,     /* Christian Grey. */
};

static void
init(void)
{
	if (!sys_init() ||
	    !window_init("Example - Font", W, H) ||
	    !theme_init())
		panic();
}

static void
run(void)
{
	struct clock clock = {0};
	struct font *font = theme_default()->fonts[THEME_FONT_INTERFACE];
	int ci = 0;
	enum font_style style = font->style;

	clock_start(&clock);

	for (;;) {
		struct texture tex;
		union event ev;
		unsigned int elapsed = clock_elapsed(&clock);

		clock_start(&clock);

		while (event_poll(&ev)) {
			switch (ev.type) {
			case EVENT_KEYDOWN:
				switch (ev.key.key) {
				case KEY_LEFT:
					if (ci > 0)
						ci--;
					break;
				case KEY_RIGHT:
					if ((size_t)ci < NELEM(colors))
						ci++;
					break;
				case KEY_SPACE:
					if (style == FONT_STYLE_ANTIALIASED)
						style = FONT_STYLE_NONE;
					else
						style = FONT_STYLE_ANTIALIASED;
				default:
					break;
				}
				break;
			case EVENT_QUIT:
				return;
			default:
				break;
			}
		}

		painter_set_color(0xffffffff);
		painter_clear();

		font->color = colors[ci];
		font->style = style;

		if (!font_render(font, &tex, "Example of text. Use <Left>/<Right> to change color and <Space> to toggle antialiasing."))
			panic();

		texture_draw(&tex, 10, 10);
		painter_present();
		texture_finish(&tex);

		if ((elapsed = clock_elapsed(&clock)) < 20)
			delay(20 - elapsed);
	}
}

static void
quit(void)
{
	theme_finish();
	window_finish();
	sys_finish();
}

int
main(int argc, char **argv)
{
	(void)argc;
	(void)argv;

	init();
	run();
	quit();

	return 0;
}