/*
 * example-label.c -- show how to use label and alignments
 *
 * Copyright (c) 2020-2023 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 <stddef.h>

#include <mlk/core/core.h>
#include <mlk/core/err.h>
#include <mlk/core/event.h>
#include <mlk/core/game.h>
#include <mlk/core/painter.h>
#include <mlk/core/panic.h>
#include <mlk/core/state.h>
#include <mlk/core/sys.h>
#include <mlk/core/util.h>
#include <mlk/core/window.h>

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

#include <mlk/example/example.h>
#include <mlk/example/glower.h>

static struct mlk_label_style style = {
	.color = 0x005162ff
};

/*
 * Add a glower effect to the main label in the middle.
 */
static void main_update(struct mlk_label_delegate *, struct mlk_label *, unsigned int);

static struct mlk_glower main_glower = {
	.start  = 0xffce7fff,
	.end    = 0xd58d6bff,
	.delay  = 22
};
static struct mlk_label_delegate main_delegate = {
	.update = main_update
};
static struct mlk_label_style main_style;

static struct {
	enum mlk_align align;
	struct mlk_label label;
} table[] = {
	{
		.align = MLK_ALIGN_CENTER,
		.label = {
			.text = "The world is Malikania.",
			.style = &main_style,
			.delegate = &main_delegate
		}
	},
	{
		.align = MLK_ALIGN_TOP_LEFT,
		.label = {
			.text = "Top left",
			.style = &style
		}
	},
	{
		.align = MLK_ALIGN_TOP,
		.label = {
			.text = "Top",
			.style = &style
		}
	},
	{
		.align = MLK_ALIGN_TOP_RIGHT,
		.label = {
			.text = "Top right",
			.style = &style
		}
	},
	{
		.align = MLK_ALIGN_RIGHT,
		.label = {
			.text = "Right",
			.style = &style
		}
	},
	{
		.align = MLK_ALIGN_BOTTOM_RIGHT,
		.label = {
			.text = "Bottom right",
			.style = &style
		}
	},
	{
		.align = MLK_ALIGN_BOTTOM,
		.label = {
			.text = "Bottom",
			.style = &style
		}
	},
	{
		.align = MLK_ALIGN_BOTTOM_LEFT,
		.label = {
			.text = "Bottom left",
			.style = &style
		}
	},
	{
		.align = MLK_ALIGN_LEFT,
		.label = {
			.text = "Left",
			.style = &style
		}
	}
};

static struct mlk_label mouse_label = {
	.text = "This one follows your mouse and is not aligned.",
	.style = &style
};

static void
main_update(struct mlk_label_delegate *delegate, struct mlk_label *label, unsigned int ticks)
{
	(void)delegate;

	mlk_glower_update(&main_glower, ticks);
	label->style->color = main_glower.color;
}

static void
init(void)
{
	unsigned int w, h;
	struct mlk_label *l;

	if (mlk_example_init("example-label") < 0)
		mlk_panic();

	for (size_t i = 0; i < MLK_UTIL_SIZE(table); ++i) {
		l = &table[i].label;
		mlk_label_query(l, &w, &h);
		mlk_align(table[i].align, &l->x, &l->y, w, h, 0, 0, mlk_window.w, mlk_window.h);
	}

	mlk_glower_init(&main_glower);
}

static void
handle(struct mlk_state *st, const union mlk_event *ev)
{
	(void)st;

	switch (ev->type) {
	case MLK_EVENT_MOUSE:
		mouse_label.x = ev->mouse.x;
		mouse_label.y = ev->mouse.y;
		break;
	case MLK_EVENT_QUIT:
		mlk_game_quit();
		break;
	default:
		break;
	}
}

static void
update(struct mlk_state *st, unsigned int ticks)
{
	(void)st;

	for (size_t i = 0; i < MLK_UTIL_SIZE(table); ++i)
		mlk_label_update(&table[i].label, ticks);

	mlk_label_update(&mouse_label, ticks);
}

static void
draw(struct mlk_state *st)
{
	(void)st;

	mlk_painter_set_color(MLK_EXAMPLE_BG);
	mlk_painter_clear();

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

	mlk_label_draw(&mouse_label);
	mlk_painter_present();
}

static void
run(void)
{
	struct mlk_state state = {
		.handle = handle,
		.update = update,
		.draw = draw
	};

	mlk_game_init();
	mlk_game_push(&state);
	mlk_game_loop();
}

static void
quit(void)
{
	mlk_example_finish();
}

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

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