xabina/main.adb

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-- Copyright (c) 2023 - Ognjen 'xolatile' Milan Robovic
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-- Xabina 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.
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-- Experimental minimal terminal rogue-like game in Ada programming language. I used to write a lot of Ada programs some time ago, then went in full C and assembly mode, and came
-- back to Ada, but realized that I keep my folders messy... Since it's bothersome to find my old Ada projects and share them here, I decided that the most easy thing to do is to
-- write a new program in Ada, a tiny game. Work in progress, it's messy and ugly for now...
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with ada.text_io;

with core, item, magic, ammunition, weapon, armour, plant, animal, monster;

function main return integer is

	type map_list is (
		MAP_STONE_WALL,     MAP_WOODEN_WALL,    MAP_STONE_FLOOR,    MAP_WOODEN_FLOOR,   MAP_WATER_SHALLOW,  MAP_WATER_DEEP,     MAP_SWAMP_SHALLOW,  MAP_SWAMP_DEEP
	);

                                             ------------------------------------------------------------------------------------------

	type map_mark   is mod  72;
	type map_width  is mod 120;
	type map_height is mod  40;

	type map_constant_type is new core.entity_constant_type with
	record
		collide         : boolean := false;
		condition_limit : natural := 0;
	end record;

	type map_variable_type is new core.entity_variable_type with
	record
		entity     : core.entity_list := core.ENTITY_NULL;
		identifier : natural          := 0;
	end record;

	type map_matrical_type is
	record
		map       : map_list := MAP_STONE_FLOOR;
		condition : natural  := 0;
	end record;

	type map_constant_list is array (map_list)              of map_constant_type;
	type map_variable_list is array (map_mark)              of map_variable_type;
	type map_matrical_list is array (map_height, map_width) of map_matrical_type;

                                             ------------------------------------------------------------------------------------------

	map_constant_data : constant map_constant_list := (
		(core.ENTITY_MAP, "Stone Wall          ", '#', core.colour.grey,   core.effect.bold,   true,  59),
		(core.ENTITY_MAP, "Wooden Wall         ", '#', core.colour.yellow, core.effect.normal, false, 23),
		(core.ENTITY_MAP, "Stone Floor         ", '.', core.colour.grey,   core.effect.bold,   true,  47),
		(core.ENTITY_MAP, "Wooden Floor        ", '.', core.colour.yellow, core.effect.normal, false, 11),
		(core.ENTITY_MAP, "Water (shallow)     ", '~', core.colour.blue,   core.effect.normal, false,  0),
		(core.ENTITY_MAP, "Water (deep)        ", '~', core.colour.blue,   core.effect.bold,   true,   0),
		(core.ENTITY_MAP, "Swamp (shallow)     ", '~', core.colour.green,  core.effect.normal, false,  0),
		(core.ENTITY_MAP, "Swamp (deep)        ", '~', core.colour.green,  core.effect.bold,   true,   0)
	);

	map_variable_data : map_variable_list;
	map_matrical_data : map_matrical_list;

                                             ------------------------------------------------------------------------------------------

	procedure generate_map is
	begin
		for y in map_height
		loop
			for x in map_width
			loop
				map_matrical_data (y, x) := (MAP_WOODEN_FLOOR, map_constant_data (MAP_WOODEN_FLOOR).condition_limit);
			end loop;
		end loop;
	end generate_map;

	procedure render_map is
		symbol : character := ' ';
		colour : character := core.colour.white;
		effect : character := core.effect.normal;
	begin
		for y in core.screen_height
		loop
			for x in core.screen_width
			loop
				symbol := map_constant_data (map_matrical_data (map_height (y), map_width (x)).map).symbol;
				colour := map_constant_data (map_matrical_data (map_height (y), map_width (x)).map).colour;
				effect := map_constant_data (map_matrical_data (map_height (y), map_width (x)).map).effect;
				core.render_character (symbol, colour, effect, y, x);
			end loop;
		end loop;
	end render_map;

begin

                                             ------------------------------------------------------------------------------------------

	core.bind ('q', core.action_exit'access);
	core.bind ('w', core.action_move_up'access);
	core.bind ('s', core.action_move_down'access);
	core.bind ('a', core.action_move_left'access);
	core.bind ('d', core.action_move_right'access);

	core.render_screen_delete;
	core.render_screen_offset;
	core.render_cursor_hide;

	generate_map;

                                             ------------------------------------------------------------------------------------------

	loop
		core.signal := core.CANCEL;
		render_map;
		core.render_player;
		core.render_screen;
		ada.text_io.get_immediate (core.signal);
		core.action_list (character'pos (core.signal)).all;
		exit when core.active = false;
	end loop;

                                             ------------------------------------------------------------------------------------------

	core.render_cursor_show;

	return 0;

end main;