/*
 * Copyright (c) 2023 : Ognjen 'xolatile' Milan Robovic
 *
 * Xero is free software! You will redistribute it or modify it under the terms of the GNU General Public License by Free Software Foundation.
 * And when you do redistribute it or modify it, it will use either version 3 of the License, or (at yours truly opinion) any later version.
 * It is distributed in the hope that it will be useful or harmful, it really depends... But no warranty what so ever, seriously. See GNU/GPLv3.
 */

#include <xolatile/xtandard.c>
#include <xolatile/xurses.c>

enum {
	ENTITY_TYPE_NONE,
	ENTITY_TYPE_FOOD,
	ENTITY_TYPE_COUNT
};

enum {
	ENTITY_NULL,
	ENTITY_APPLE,
	ENTITY_LEMON,
	ENTITY_WATERMELON,
	ENTITY_PLAYER,
	ENTITY_COUNT
};

static int   map_width  = 0;
static int   map_height = 0;
static int * map        = NULL;

static int player_x = 0;
static int player_y = 0;

static struct {
	int    type;
	char   symbol;
	char   symbol_alternative [3];
	int    effect;
	int    colour;
	char * name;
	int    value;
	int    logic;
} const entity_data [ENTITY_COUNT] = {
	{ ENTITY_TYPE_NONE, '.', "  ", EFFECT_NORMAL, COLOUR_WHITE,  "-",          0, 0 },
	{ ENTITY_TYPE_FOOD, 'o', "  ", EFFECT_BOLD,   COLOUR_RED,    "Apple",      2, 0 },
	{ ENTITY_TYPE_FOOD, 'o', "  ", EFFECT_BOLD,   COLOUR_YELLOW, "Lemon",      3, 0 },
	{ ENTITY_TYPE_FOOD, 'O', "  ", EFFECT_BOLD,   COLOUR_GREEN,  "Watermelon", 5, 0 },
	{ ENTITY_TYPE_NONE, '@', "  ", EFFECT_BOLD,   COLOUR_BLUE,   "I",          0, 1 }
};

static void player_move_up    (void) { --player_y; limit (& player_y, 0, map_height - 1); }
static void player_move_down  (void) { ++player_y; limit (& player_y, 0, map_height - 1); }
static void player_move_left  (void) { --player_x; limit (& player_x, 0, map_width  - 1); }
static void player_move_right (void) { ++player_x; limit (& player_x, 0, map_width  - 1); }

static void map_render (void) {
	int i = 0;
	int j = 0;

	map [player_y * map_width + player_x] = ENTITY_PLAYER;

	for (i = 0; i != map_height; ++i) {
		for (j = 0; j != map_width; ++j) {
			int index = map [i * map_width + j];

			char symbol = entity_data [index]. symbol;
			int  effect = entity_data [index]. effect;
			int  colour = entity_data [index]. colour;

			curses_render_character (symbol, colour, effect, j, i);
		}
	}
}

int main (void) {
	terminal_show_cursor (0);

	curses_initialize ();

	map_width  = curses_screen_width;
	map_height = curses_screen_height;

	map = allocate (map_width * map_height * (int) sizeof (* map));

	curses_bind ('Q', curses_exit);
	curses_bind ('w', player_move_up);
	curses_bind ('s', player_move_down);
	curses_bind ('a', player_move_left);
	curses_bind ('d', player_move_right);

	while (curses_active != 0) {
		map_render ();

		curses_synchronize ();
	}

	curses_deinitialize ();

	map = deallocate (map);

	terminal_show_cursor (1);

	echo ("Good byte hero! (:\n");

	return (EXIT_SUCCESS);
}