/*
 * LimoX - The Linux on mobile XMPP chat client
 * Copyright (C) 2022  xengineering
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
 */


#include <SDL2/SDL.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>

#include "xmpp.h"


struct GuiContext {
	bool quit;
	SDL_Event event;
	SDL_Window* window;
	SDL_Renderer* renderer;
	SDL_Texture* texture;
	uint32_t* pixels;
	int xmpp_fd;
};


struct GuiContext *init() {
	struct GuiContext *ctx = malloc(sizeof(struct GuiContext));

	ctx->quit = false;
	ctx->xmpp_fd = -1;

	ctx->pixels = malloc(sizeof(uint32_t) * 640 * 480);
	memset(ctx->pixels, 255, 640 * 480 * sizeof(uint32_t));

	SDL_Init(SDL_INIT_VIDEO);

	return ctx;
}

void deinit(struct GuiContext *ctx) {

	// TODO this seems to end in memory access errors but ... why?
	//SDL_DestroyTexture(texture);
	//SDL_DestroyRenderer(renderer);

	SDL_Quit();

	free(ctx->pixels);
	free(ctx);
}

bool create_window(struct GuiContext *ctx) {

	ctx->window = SDL_CreateWindow("LimoX",
	    SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480,
	    SDL_WINDOW_RESIZABLE
	);

	ctx->renderer = SDL_CreateRenderer(ctx->window, -1, 0);
	ctx->texture = SDL_CreateTexture(ctx->renderer, SDL_PIXELFORMAT_ARGB8888,
	                                 SDL_TEXTUREACCESS_STATIC, 640, 480);

	return ctx->window != NULL;
}

void gui_run(void) {

	struct GuiContext *ctx = init();

	fprintf(stderr, "SDL2 video driver: %s\n", SDL_GetCurrentVideoDriver());

	if (!create_window(ctx)) {
		fprintf(stderr, "Failed to create SDL2 window!\n");
		return;
	}

	while (!ctx->quit) {
		SDL_UpdateTexture(ctx->texture, NULL, ctx->pixels, 640 * sizeof(uint32_t));
		SDL_WaitEvent(&ctx->event);
		switch (ctx->event.type) {
		case SDL_QUIT:
			ctx->quit = true;
			break;
		case SDL_MOUSEBUTTONDOWN:
			if (ctx->xmpp_fd == -1) {
				ctx->xmpp_fd = xmpp_connect();
			} else {
				close(ctx->xmpp_fd);
				ctx->xmpp_fd = -1;
				printf("Closed XMPP connection.\n");
			}
			break;
		}
		SDL_RenderClear(ctx->renderer);
		SDL_RenderCopy(ctx->renderer, ctx->texture, NULL, NULL);
		SDL_RenderPresent(ctx->renderer);
	}

	SDL_DestroyWindow(ctx->window);
	deinit(ctx);

}