/*
 * debug.c -- debugging interfaces
 *
 * 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 <assert.h>
#include <stdio.h>

#include <mlk/core/font.h>
#include <mlk/core/texture.h>

#include "debug.h"
#include "ui.h"
#include "ui_p.h"

static void
draw(const char *line, unsigned int n)
{
	struct mlk_font *font;
	struct mlk_texture tex;
	int x, y;

	font = MLK__STYLE_FONT(mlk_debug_style.font, MLK_UI_FONT_INTERFACE);

	if (mlk_font_render(font, &tex, line, MLK_UI_COLOR_DEBUG) < 0)
		return;

	x = mlk_debug_style.padding;
	y = (mlk_debug_style.padding * (n + 1)) + (tex.h * n);

	mlk_texture_draw(&tex, x, y);
	mlk_texture_finish(&tex);
}

struct mlk_debug_options mlk_debug_options = {
#if !defined(NDEBUG)
	.enable = 1
#else
	.enable = 0
#endif
};

struct mlk_debug_style mlk_debug_style = {
	.color = MLK_UI_COLOR_DEBUG,
	.padding = 10,
	.draw = draw
};

void
mlk_debugf(struct mlk_debug_report *report, const char *fmt, ...)
{
	assert(report);
	assert(fmt);

	va_list ap;

	va_start(ap, fmt);
	mlk_debugva(report, fmt, ap);
	va_end(ap);
}

void
mlk_debugva(struct mlk_debug_report *report, const char *fmt, va_list ap)
{
	assert(report);
	assert(fmt);

	char line[MLK_DEBUG_LINE_MAX] = {};

	if (!mlk_debug_options.enable)
		return;

	vsnprintf(line, sizeof (line), fmt, ap);

	if (mlk_debug_style.draw)
		mlk_debug_style.draw(line, report->count);

	report->count++;
}