xabina/xabina.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, ada.strings.unbounded;
use  ada.text_io, ada.strings.unbounded;

-- Do not use this command below, it's for real-time game...
-- $ gnatmake xabina.adb && stty raw -echo && ./xabina && reset

function xabina return integer is

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-- System
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	type integer_subrange is
	record
		minimum : integer := 0;
		maximum : integer := 0;
	end record;

	type natural_subrange is
	record
		minimum : natural := 0;
		maximum : natural := 0;
	end record;

	type colours is (
		COLOUR_GREY,        COLOUR_RED,         COLOUR_GREEN,       COLOUR_YELLOW,      COLOUR_BLUE,        COLOUR_PINK,        COLOUR_CYAN,        COLOUR_WHITE
	);

	type effects is (
		EFFECT_NORMAL,      EFFECT_BOLD,        EFFECT_ITALIC,      EFFECT_UNDERLINE,   EFFECT_BLINK,       EFFECT_REVERSE
	);

	function render_character ( -- A joke function...
		symbol : character := ' ';
		colour : colours   := COLOUR_WHITE;
		effect : effects   := EFFECT_NORMAL
	) return natural is
	begin
		put (character'val (27) & "[");
		case effect is
			when EFFECT_NORMAL    => put ("0");
			when EFFECT_BOLD      => put ("1");
			when EFFECT_ITALIC    => put ("3");
			when EFFECT_UNDERLINE => put ("4");
			when EFFECT_BLINK     => put ("5");
			when EFFECT_REVERSE   => put ("7");
		end case;
		put (";3");
		case colour is
			when COLOUR_GREY   => put ("0");
			when COLOUR_RED    => put ("1");
			when COLOUR_GREEN  => put ("2");
			when COLOUR_YELLOW => put ("3");
			when COLOUR_BLUE   => put ("4");
			when COLOUR_PINK   => put ("5");
			when COLOUR_CYAN   => put ("6");
			when COLOUR_WHITE  => put ("7");
		end case;
		put ("m");
		put (symbol);
		put (character'val (27) & "[0m");
		return 1;
	end render_character;

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-- Entity
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	type entities is (
		ENTITY_NULL,        ENTITY_MENU,        ENTITY_MAP,         ENTITY_ITEM,        ENTITY_SPELL,       ENTITY_AMMUNITION,  ENTITY_WEAPON,      ENTITY_ARMOUR,
		ENTITY_SCROLL,      ENTITY_POTION,      ENTITY_CONSUMABLE,  ENTITY_NOTE,        ENTITY_PLANT,       ENTITY_ANIMAL,      ENTITY_GOBLIN,      ENTITY_PLAYER
	);

	type entity_constant_type is tagged
	record
		entity : entities         := ENTITY_NULL;           -- Entity identifier.
		name   : unbounded_string := null_unbounded_string; -- Entity general name.
		symbol : character        := ' ';                   -- Entity ASCII character representation.
		colour : colours          := COLOUR_WHITE;          -- Entity VT100 escape sequence colour.
		effect : effects          := EFFECT_NORMAL;         -- Entity VT100 escape sequence effect.
	end record;

	type entity_variable_type is tagged
	record
		x : integer := 0; -- Global X coordinate.
		y : integer := 0; -- Global Y coordinate.
	end record;

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-- Menu
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-- Map:
-- -- Map data is only constant, not variable, since X and Y coordinates are determined by player, camera or global position.
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	type map_list is (
		STONE_WALL,         WOODEN_WALL,        STONE_FLOOR,        WOODEN_FLOOR,       WATER_SHALLOW,      WATER_DEEP,         SWAMP_SHALLOW,      SWAMP_DEEP
	);

	type map_constant_type is new entity_constant_type with
	record
		collide : boolean := false;
	end record;

	type map_constant_list is array (map_list) of map_constant_type;

	map_constant_data : constant map_constant_list := (
		(ENTITY_MAP, to_unbounded_string ("Stone Wall"),      '#', COLOUR_GREY,   EFFECT_BOLD,   true),
		(ENTITY_MAP, to_unbounded_string ("Wooden Wall"),     '#', COLOUR_YELLOW, EFFECT_NORMAL, true),
		(ENTITY_MAP, to_unbounded_string ("Stone Floor"),     '.', COLOUR_GREY,   EFFECT_BOLD,   false),
		(ENTITY_MAP, to_unbounded_string ("Wooden Floor"),    '.', COLOUR_YELLOW, EFFECT_NORMAL, false),
		(ENTITY_MAP, to_unbounded_string ("Water (shallow)"), '~', COLOUR_BLUE,   EFFECT_NORMAL, false),
		(ENTITY_MAP, to_unbounded_string ("Water (deep)"),    '~', COLOUR_BLUE,   EFFECT_BOLD,   true),
		(ENTITY_MAP, to_unbounded_string ("Swamp (shallow)"), '~', COLOUR_GREEN,  EFFECT_NORMAL, false),
		(ENTITY_MAP, to_unbounded_string ("Swamp (deep)"),    '~', COLOUR_GREEN,  EFFECT_BOLD,   true)
	);

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-- Item
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-- Spell
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-- Ammunition
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-- Weapon
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	type weapon_list is (
		IRON_SWORD,         IRON_GREATSWORD,    IRON_AXE,           IRON_BATTLEAXE,     IRON_SPEAR,         IRON_SHIELD,        IRON_MACE,          IRON_HAMMER
	);

	type weapon_mark is mod 72;

	type weapon_constant_type is new entity_constant_type with
	record
		dual_wield     : boolean          := false;
		weight         : natural          := 0;
		value          : natural          := 0;
		attack_range   : integer_subrange := (0, 0);
		defense_range  : integer_subrange := (0, 0);
		distance_range : integer_subrange := (0, 0);
		-- description    : unbounded_string := null_unbounded_string;
	end record;

	type weapon_variable_type is new entity_variable_type with
	record
		enchantment : natural := 0;
		condition   : natural := 0;
	end record;

	type weapon_constant_list is array (weapon_list) of weapon_constant_type;
	type weapon_variable_list is array (weapon_mark) of weapon_variable_type;

	weapon_constant_data : constant weapon_constant_list := (
		(ENTITY_WEAPON, to_unbounded_string ("Iron Sword"),      'l', COLOUR_RED, EFFECT_NORMAL, true,  31, 11, (3,  7), (0, 2), (0, 1)),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Greatsword"), 'L', COLOUR_RED, EFFECT_BOLD,   false, 67, 19, (5, 11), (1, 3), (0, 2)),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Axe"),        'r', COLOUR_RED, EFFECT_NORMAL, true,  43, 13, (1,  7), (0, 2), (0, 1)),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Battleaxe"),  'T', COLOUR_RED, EFFECT_BOLD,   false, 73, 17, (6, 13), (1, 2), (0, 2)),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Spear"),      'I', COLOUR_RED, EFFECT_BOLD,   false, 53, 11, (4, 10), (2, 4), (0, 2)),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Shield"),     'o', COLOUR_RED, EFFECT_NORMAL, true,  37, 13, (0,  3), (4, 9), (0, 1)),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Mace"),       'i', COLOUR_RED, EFFECT_NORMAL, true,  41, 11, (3,  8), (0, 2), (0, 1)),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Hammer"),     't', COLOUR_RED, EFFECT_NORMAL, true,  47, 13, (4,  7), (0, 3), (0, 1))
	);

	weapon_variable_data : weapon_variable_list;

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-- Armour
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-- Scroll
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-- Potion
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-- Consumable
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-- Note
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-- Plant
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	type plant_list is (
		PLANT_FLOWER,       PLANT_GRASS,        PLANT_REED,         PLANT_BUSH,         PLANT_APPLE_TREE,   PLANT_LEMON_TREE,   PLANT_OAK_TREE,     PLANT_PINE_TREE
	);

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-- Animal
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	type animal_list is (
		ANIMAL_ROACH,       ANIMAL_RAT,         ANIMAL_BAT,         ANIMAL_SPIDER,      ANIMAL_LIZARD,      ANIMAL_SNAIL,       ANIMAL_WORM,        ANIMAL_MOLE
	);

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-- Goblin
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	type goblin_list is (
		GOBLIN_FEMALE,      GOBLIN_WORKER,      GOBLIN_WARRIOR,     GOBLIN_BOAR_RIDER,  GOBLIN_SHAMAN,      GOBLIN_CHIEF,       GOBLIN_KING,        GOBLIN_OGRE
	);

	type goblin_constant_type is new entity_constant_type with
	record
		health_limit  : natural          := 0;
		armour_limit  : natural          := 0;
		mana_limit    : natural          := 0;
		stamina_limit : natural          := 0;
		attack_range  : natural_subrange := (0, 0);
	end record;

	type goblin_variable_type is new entity_variable_type with
	record
		health  : natural := 0;
		armour  : natural := 0;
		mana    : natural := 0;
		stamina : natural := 0;
	end record;

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-- Player
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-- Gameplay
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	x : natural := 0;

begin

	for this in weapon_list
	loop
		put_line ("> " & to_string (weapon_constant_data (this).name));
	end loop;

	x := x + render_character ('@', COLOUR_BLUE, EFFECT_BOLD);

	return 0;

end xabina;