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/*
 * Copyright (C) 2021  P. J. McDermott
 *
 * This file is part of Maze Fight
 *
 * Maze Fight 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 3 of the License, or
 * (at your option) any later version.
 *
 * Maze Fight 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 Maze Fight.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <SDL.h>
#include "../tk.h"
#include "widget.h"

struct mftk_check {
	struct mftk_widget   parent;
	int                  butn_width;
	int                  butn_padding;
	SDL_Color           *butn_color;
	SDL_Color           *mark_color;
	int                  state;
	int                  label_padding;
	struct mftk_widget  *label;
	int                (*action)(void *, int);
	void                *user_data;
};

static void
_mftk_check_layout(struct mftk_widget *w)
{
	struct mftk_check *c = (struct mftk_check *) w;

	mftk_widget_layout(c->label);

	w->w = c->butn_width;
	if (c->label != NULL) {
		w->w += c->label_padding + c->label->w;
	}
	w->h = c->butn_width;
	if (c->label != NULL && c->label->h > w->h) {
		w->h = c->label->h;
	}
}

static int
_mftk_check_event(struct mftk_widget *w, SDL_Event *e,
		int x __attribute__((__unused__)),
		int y __attribute__((__unused__)))
{
	struct mftk_check *c = (struct mftk_check *) w;

	switch (e->type) {
		case SDL_MOUSEBUTTONUP:
			if (e->button.button == SDL_BUTTON_LEFT) {
				c->state = !c->state;
				return c->action(c->user_data, c->state);
			}
			break;
		default:
			break;
	}

	return 0;
}

static int
_mftk_check_render(struct mftk_widget *w, SDL_Renderer *renderer, int x, int y)
{
	struct mftk_check *c = (struct mftk_check *) w;
	SDL_Rect           rect;

	rect.x = x;
	rect.y = y;
	rect.w = c->butn_width;
	rect.h = c->butn_width;
	if (SDL_SetRenderDrawColor(renderer,
				c->butn_color->r, c->butn_color->g,
				c->butn_color->b, c->butn_color->a) < 0 ||
			SDL_RenderFillRect(renderer, &rect) < 0) {
		SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
				"Couldn't render widget: %s",
				SDL_GetError());
		return -1;
	}

	if (c->state == SDL_TRUE) {
		rect.x += c->butn_padding;
		rect.y += c->butn_padding;
		rect.w -= c->butn_padding * 2;
		rect.h -= c->butn_padding * 2;
		if (SDL_SetRenderDrawColor(renderer,
					c->mark_color->r, c->mark_color->g,
					c->mark_color->b, c->mark_color->a) < 0
				|| SDL_RenderFillRect(renderer, &rect) < 0) {
			SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
					"Couldn't render widget: %s",
					SDL_GetError());
			return -1;
		}
	}

	if (c->label != NULL && mftk_widget_render(c->label, renderer,
				x + c->butn_width + c->label_padding, y) < 0) {
		return -1;
	}

	return 0;
}

static void
_mftk_check_destroy(struct mftk_widget *w)
{
	struct mftk_check *c = (struct mftk_check *) w;

	if (c->label != NULL) {
		mftk_widget_destroy(&c->label);
	}
}

struct mftk_widget *
mftk_check_new(int butn_width, int butn_padding, SDL_Color *butn_color,
		SDL_Color *mark_color, int state, int label_padding,
		TTF_Font *font, const char *text, SDL_Color *text_color,
		int (*action)(void *, int), void *user_data,
		SDL_Renderer *renderer)
{
	struct mftk_widget *w;
	struct mftk_check  *c;

	mftk_widget_init(w, c, check);

	if (font != NULL && text != NULL && text_color != NULL) {
		c->label = mftk_label_new(font, text, text_color, renderer);
		if (c->label == NULL) {
			free(c);
			return NULL;
		}
	}

	c->butn_width    = butn_width;
	c->butn_padding  = butn_padding;
	c->butn_color    = butn_color;
	c->mark_color    = mark_color;
	c->state         = state;
	c->label_padding = label_padding;
	c->action        = action;
	c->user_data     = user_data;

	return w;
}