/*
 * example-label.c -- show how to use label and alignments
 *
 * 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/core.h>
#include <core/event.h>
#include <core/painter.h>
#include <core/panic.h>
#include <core/sys.h>
#include <core/util.h>
#include <core/window.h>

#include <ui/align.h>
#include <ui/label.h>
#include <ui/theme.h>
#include <ui/ui.h>

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

struct {
	enum align align;
	struct label label;
} table[] = {
	{
		.align = ALIGN_TOP_LEFT,
		.label = {
			.text = "Top left"
		}
	},
	{
		.align = ALIGN_TOP,
		.label = {
			.text = "Top",
		}
	},
	{
		.align = ALIGN_TOP_RIGHT,
		.label = {
			.text = "Top right",
		}
	},
	{
		.align = ALIGN_RIGHT,
		.label = {
			.text = "Right",
		}
	},
	{
		.align = ALIGN_BOTTOM_RIGHT,
		.label = {
			.text = "Bottom right",
		}
	},
	{
		.align = ALIGN_BOTTOM,
		.label = {
			.text = "Bottom",
		}
	},
	{
		.align = ALIGN_BOTTOM_LEFT,
		.label = {
			.text = "Bottom left",
		}
	},
	{
		.align = ALIGN_LEFT,
		.label = {
			.text = "Left",
		}
	},
	{
		.align = ALIGN_CENTER,
		.label = {
			.text = "The world is Malikania.",
			.flags = LABEL_FLAGS_SHADOW
		}
	}
};

static void
init(void)
{
	if (!core_init() || !ui_init())
		panic();
	if (!window_open("Example - Label", W, H))
		panic();

	for (size_t i = 0; i < NELEM(table); ++i) {
		struct label *l = &table[i].label;
		unsigned int w, h;

		label_query(l, &w, &h);
		align(table[i].align, &l->x, &l->y, w, h, 0, 0, W, H);
	}
}

static void
quit(void)
{
	window_finish();
	ui_finish();
	core_finish();
}

static void
run(void)
{
	struct clock clock = {0};
	struct label mlabel = {
		.text = "This one follows your mouse and is not aligned."
	};

	clock_start(&clock);

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

		clock_start(&clock);

		while (event_poll(&ev)) {
			switch (ev.type) {
			case EVENT_MOUSE:
				mlabel.x = ev.mouse.x;
				mlabel.y = ev.mouse.y;
				break;
			case EVENT_QUIT:
				return;
			default:
				break;
			}
		}

		painter_set_color(0x4f8fbaff);
		painter_clear();

		for (size_t i = 0; i < NELEM(table); ++i)
			label_draw(&table[i].label);

		label_draw(&mlabel);
		painter_present();

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

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

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