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 && stty sane

function xabina return integer is

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-- System
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	SIGNAL_A : constant character := 'a';
	SIGNAL_B : constant character := 'b';
	SIGNAL_C : constant character := 'c';
	SIGNAL_D : constant character := 'd';
	SIGNAL_E : constant character := 'e';
	SIGNAL_F : constant character := 'f';
	SIGNAL_G : constant character := 'g';
	SIGNAL_H : constant character := 'h';
	SIGNAL_I : constant character := 'i';
	SIGNAL_J : constant character := 'j';
	SIGNAL_K : constant character := 'k';
	SIGNAL_L : constant character := 'l';
	SIGNAL_M : constant character := 'm';
	SIGNAL_N : constant character := 'n';
	SIGNAL_O : constant character := 'o';
	SIGNAL_P : constant character := 'p';
	SIGNAL_Q : constant character := 'q';
	SIGNAL_R : constant character := 'r';
	SIGNAL_S : constant character := 's';
	SIGNAL_T : constant character := 't';
	SIGNAL_U : constant character := 'u';
	SIGNAL_V : constant character := 'v';
	SIGNAL_W : constant character := 'w';
	SIGNAL_X : constant character := 'x';
	SIGNAL_Y : constant character := 'y';
	SIGNAL_Z : constant character := 'z';

	SIGNAL_0 : constant character := '0';
	SIGNAL_1 : constant character := '1';
	SIGNAL_2 : constant character := '2';
	SIGNAL_3 : constant character := '3';
	SIGNAL_4 : constant character := '4';
	SIGNAL_5 : constant character := '5';
	SIGNAL_6 : constant character := '6';
	SIGNAL_7 : constant character := '7';
	SIGNAL_8 : constant character := '8';
	SIGNAL_9 : constant character := '9';

	SIGNAL_DOT       : constant character := '.';
	SIGNAL_COMMA     : constant character := ',';
	SIGNAL_SEMICOLON : constant character := ';';
	SIGNAL_SLASH     : constant character := '/';
	SIGNAL_BACKSLASH : constant character := '\';
	SIGNAL_QUOTE     : constant character := ''';
	SIGNAL_BACKQUOTE : constant character := '`';
	SIGNAL_SPACE     : constant character := ' ';

	SIGNAL_BACKSPACE : constant character := character'val ( 8);
	SIGNAL_TABULATOR : constant character := character'val ( 9);
	SIGNAL_LINE_FEED : constant character := character'val (13);
	SIGNAL_IDLE      : constant character := character'val (24);

	type signal_list is mod 128;

	COLOUR_GREY   : constant character := '0';
	COLOUR_RED    : constant character := '1';
	COLOUR_GREEN  : constant character := '2';
	COLOUR_YELLOW : constant character := '3';
	COLOUR_BLUE   : constant character := '4';
	COLOUR_PINK   : constant character := '5';
	COLOUR_CYAN   : constant character := '6';
	COLOUR_WHITE  : constant character := '7';

	EFFECT_NORMAL    : constant character := '0';
	EFFECT_BOLD      : constant character := '1';
	EFFECT_ITALIC    : constant character := '3';
	EFFECT_UNDERLINE : constant character := '4';
	EFFECT_BLINK     : constant character := '5';
	EFFECT_REVERSE   : constant character := '7';

	CANCEL          : constant character := character'val (24);
	CARRIAGE_RETURN : constant character := character'val (10);
	LINE_FEED       : constant character := character'val (13);
	ESCAPE          : constant character := character'val (27);

	function format_symbol (
		symbol : character := ' ';
		colour : character := COLOUR_WHITE;
		effect : character := EFFECT_NORMAL
	) return string is
		format : string (1 .. 12) := escape & "[E;3CmS" & escape & "[0m";
	begin
		format (8) := symbol;
		format (6) := colour;
		format (3) := effect;
		return format;
	end format_symbol;

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-- Entity
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	type entity_list is (
		ENTITY_NULL,        ENTITY_MENU,        ENTITY_MAP,         ENTITY_ITEM,        ENTITY_MAGIC,       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 : entity_list      := ENTITY_NULL;           -- Entity identifier.
		name   : unbounded_string := null_unbounded_string; -- Entity general name.
		symbol : character        := ' ';                   -- Entity ASCII character representation.
		colour : character        := COLOUR_WHITE;          -- Entity VT100 escape sequence colour.
		effect : character        := 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.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

	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)
	);

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Item
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

	type item_list is (
		WOOD,               BARK,               FLAX,               PLANK,              STICK,              BRACES,             NAILS,              LINEN,
		CHAMOMILE,          MINT,               WAX,                SALT,               SUGAR,              PEPPER,             CINNAMON,           YEAST,
		SKULL,              BONE,               INTESTINES,         FUR,                LEATHER,            FAT,                HORN,               TUSK,
		COPPER_ORE,         IRON_ORE,           SILVER_ORE,         GOLD_ORE,           COAL_ORE,           TIN_ORE,            ZINC_ORE,           LEAD_ORE,
		COPPER,             IRON,               SILVER,             GOLD,               COAL,               TIN,                ZINC,               LEAD,
		BRONZE,             BRASS,              STEEL,              MERCURY,            OIL,                INK,                VENOM,              SILK,
		PAPERS,             PAPERWEIGHT
	);

	type item_mark is mod 72;

	type item_constant_type is new entity_constant_type with
	record
		value  : natural := 0;
		weight : natural := 0;
	end record;

	type item_variable_type is new entity_variable_type with
	record
		owner : natural := 0;
	end record;

	type item_constant_list is array (item_list) of item_constant_type;
	type item_variable_list is array (item_mark) of item_variable_type;

	item_constant_data : constant item_constant_list := (
		(ENTITY_ITEM, to_unbounded_string ("Wood"),        '+', COLOUR_YELLOW, EFFECT_NORMAL,  2,  2),
		(ENTITY_ITEM, to_unbounded_string ("Bark"),        '+', COLOUR_YELLOW, EFFECT_NORMAL,  1,  2),
		(ENTITY_ITEM, to_unbounded_string ("Flax"),        '+', COLOUR_YELLOW, EFFECT_NORMAL,  3,  1),
		(ENTITY_ITEM, to_unbounded_string ("Plank"),       '+', COLOUR_YELLOW, EFFECT_NORMAL,  2,  2),
		(ENTITY_ITEM, to_unbounded_string ("Stick"),       '+', COLOUR_YELLOW, EFFECT_NORMAL,  2,  2),
		(ENTITY_ITEM, to_unbounded_string ("Braces"),      '+', COLOUR_YELLOW, EFFECT_NORMAL,  2,  1),
		(ENTITY_ITEM, to_unbounded_string ("Nails"),       '+', COLOUR_YELLOW, EFFECT_NORMAL,  1,  1),
		(ENTITY_ITEM, to_unbounded_string ("Linen"),       '+', COLOUR_YELLOW, EFFECT_NORMAL, 23,  1),
		(ENTITY_ITEM, to_unbounded_string ("Chamomile"),   '+', COLOUR_YELLOW, EFFECT_NORMAL,  3,  1),
		(ENTITY_ITEM, to_unbounded_string ("Mint"),        '+', COLOUR_YELLOW, EFFECT_NORMAL,  5,  1),
		(ENTITY_ITEM, to_unbounded_string ("Wax"),         '+', COLOUR_YELLOW, EFFECT_NORMAL,  7,  1),
		(ENTITY_ITEM, to_unbounded_string ("Salt"),        '+', COLOUR_YELLOW, EFFECT_NORMAL, 13,  1),
		(ENTITY_ITEM, to_unbounded_string ("Sugar"),       '+', COLOUR_YELLOW, EFFECT_NORMAL, 17,  1),
		(ENTITY_ITEM, to_unbounded_string ("Pepper"),      '+', COLOUR_YELLOW, EFFECT_NORMAL, 11,  1),
		(ENTITY_ITEM, to_unbounded_string ("Cinnamon"),    '+', COLOUR_YELLOW, EFFECT_NORMAL, 23,  1),
		(ENTITY_ITEM, to_unbounded_string ("Yeast"),       '+', COLOUR_YELLOW, EFFECT_NORMAL,  5,  1),
		(ENTITY_ITEM, to_unbounded_string ("Skull"),       '+', COLOUR_YELLOW, EFFECT_NORMAL,  2,  1),
		(ENTITY_ITEM, to_unbounded_string ("Bone"),        '+', COLOUR_YELLOW, EFFECT_NORMAL,  1,  1),
		(ENTITY_ITEM, to_unbounded_string ("Intestines"),  '+', COLOUR_YELLOW, EFFECT_NORMAL,  1,  1),
		(ENTITY_ITEM, to_unbounded_string ("Fur"),         '+', COLOUR_YELLOW, EFFECT_NORMAL,  7,  2),
		(ENTITY_ITEM, to_unbounded_string ("Leather"),     '+', COLOUR_YELLOW, EFFECT_NORMAL,  3,  1),
		(ENTITY_ITEM, to_unbounded_string ("Fat"),         '+', COLOUR_YELLOW, EFFECT_NORMAL,  1,  1),
		(ENTITY_ITEM, to_unbounded_string ("Horn"),        '+', COLOUR_YELLOW, EFFECT_NORMAL,  2,  1),
		(ENTITY_ITEM, to_unbounded_string ("Tusk"),        '+', COLOUR_YELLOW, EFFECT_NORMAL,  3,  5),
		(ENTITY_ITEM, to_unbounded_string ("Copper Ore"),  '+', COLOUR_YELLOW, EFFECT_NORMAL,  5,  7),
		(ENTITY_ITEM, to_unbounded_string ("Iron Ore"),    '+', COLOUR_YELLOW, EFFECT_NORMAL,  7, 11),
		(ENTITY_ITEM, to_unbounded_string ("Silver Ore"),  '+', COLOUR_YELLOW, EFFECT_NORMAL, 17,  7),
		(ENTITY_ITEM, to_unbounded_string ("Gold Ore"),    '+', COLOUR_YELLOW, EFFECT_NORMAL, 23,  7),
		(ENTITY_ITEM, to_unbounded_string ("Coal Ore"),    '+', COLOUR_YELLOW, EFFECT_NORMAL,  2,  7),
		(ENTITY_ITEM, to_unbounded_string ("Tin Ore"),     '+', COLOUR_YELLOW, EFFECT_NORMAL, 13,  7),
		(ENTITY_ITEM, to_unbounded_string ("Zinc Ore"),    '+', COLOUR_YELLOW, EFFECT_NORMAL, 13,  7),
		(ENTITY_ITEM, to_unbounded_string ("Lead Ore"),    '+', COLOUR_YELLOW, EFFECT_NORMAL, 11, 13),
		(ENTITY_ITEM, to_unbounded_string ("Copper"),      '+', COLOUR_YELLOW, EFFECT_NORMAL, 17,  5),
		(ENTITY_ITEM, to_unbounded_string ("Iron"),        '+', COLOUR_YELLOW, EFFECT_NORMAL, 19,  7),
		(ENTITY_ITEM, to_unbounded_string ("Silver"),      '+', COLOUR_YELLOW, EFFECT_NORMAL, 23,  5),
		(ENTITY_ITEM, to_unbounded_string ("Gold"),        '+', COLOUR_YELLOW, EFFECT_NORMAL, 29,  5),
		(ENTITY_ITEM, to_unbounded_string ("Coal"),        '+', COLOUR_YELLOW, EFFECT_NORMAL, 19,  5),
		(ENTITY_ITEM, to_unbounded_string ("Tin"),         '+', COLOUR_YELLOW, EFFECT_NORMAL, 11,  5),
		(ENTITY_ITEM, to_unbounded_string ("Zinc"),        '+', COLOUR_YELLOW, EFFECT_NORMAL, 13,  5),
		(ENTITY_ITEM, to_unbounded_string ("Lead"),        '+', COLOUR_YELLOW, EFFECT_NORMAL, 47,  7),
		(ENTITY_ITEM, to_unbounded_string ("Bronze"),      '+', COLOUR_YELLOW, EFFECT_NORMAL, 61,  5),
		(ENTITY_ITEM, to_unbounded_string ("Brass"),       '+', COLOUR_YELLOW, EFFECT_NORMAL, 67,  5),
		(ENTITY_ITEM, to_unbounded_string ("Steel"),       '+', COLOUR_YELLOW, EFFECT_NORMAL, 71,  7),
		(ENTITY_ITEM, to_unbounded_string ("Mercury"),     '+', COLOUR_YELLOW, EFFECT_NORMAL, 97, 11),
		(ENTITY_ITEM, to_unbounded_string ("Oil"),         '+', COLOUR_YELLOW, EFFECT_NORMAL,  5,  1),
		(ENTITY_ITEM, to_unbounded_string ("Ink"),         '+', COLOUR_YELLOW, EFFECT_NORMAL, 13,  1),
		(ENTITY_ITEM, to_unbounded_string ("Venom"),       '+', COLOUR_YELLOW, EFFECT_NORMAL, 11,  1),
		(ENTITY_ITEM, to_unbounded_string ("Silk"),        '+', COLOUR_YELLOW, EFFECT_NORMAL, 13,  1),
		(ENTITY_ITEM, to_unbounded_string ("Papers"),      '+', COLOUR_YELLOW, EFFECT_NORMAL,  1,  1),
		(ENTITY_ITEM, to_unbounded_string ("Paperweight"), '+', COLOUR_YELLOW, EFFECT_NORMAL,  2,  1)
	);

	item_variable_data : item_variable_list;

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Spell
-- -- Place-holders mostly, implement self/target/target_range effect variations...
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

	type magic_list is (
		IGNITE,             ILLUMINATE,         BLADECHARM,         BATTLECRY
	);

	type magic_mark is mod 72;

	type magic_constant_type is new entity_constant_type with
	record
		self     : boolean := false;
		health   : integer := 0;
		armour   : integer := 0;
		mana     : integer := 0;
		stamina  : integer := 0;
		distance : integer := 0;
		tribute  : natural := 0;
	end record;

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

	type magic_constant_list is array (magic_list) of magic_constant_type;
	type magic_variable_list is array (magic_mark) of magic_variable_type;

	magic_constant_data : constant magic_constant_list := (
		(ENTITY_MAGIC, to_unbounded_string ("Ignite"),     '*', COLOUR_YELLOW, EFFECT_ITALIC, false, -3,  0,  0, -1,  7,  1),
		(ENTITY_MAGIC, to_unbounded_string ("Illuminate"), '*', COLOUR_YELLOW, EFFECT_ITALIC, false,  0,  0,  0, -1, 13,  1),
		(ENTITY_MAGIC, to_unbounded_string ("Bladecharm"), '*', COLOUR_RED,    EFFECT_ITALIC, true,   0, -3,  0, -1,  7,  3),
		(ENTITY_MAGIC, to_unbounded_string ("Battlecry"),  '*', COLOUR_RED,    EFFECT_ITALIC, true,  -1, -1,  0, -1,  7,  2)
	);

	magic_variable_data : magic_variable_list;

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Ammunition
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

	type ammunition_list is (
		ARROWS,             BOLTS,              SLINGSHOTS,         JARIDS
	);

	type ammunition_mark is mod 72;

	type ammunition_constant_type is new entity_constant_type with
	record
		value          : natural := 0;
		weight         : natural := 0;
		dual_wield     : boolean := false;
		amount_limit   : natural := 0;
		attack_range   : natural := 0;
		distance_range : natural := 0;
	end record;

	type ammunition_variable_type is new entity_variable_type with
	record
		amount      : natural := 0;
		enchantment : natural := 0;
	end record;

	type ammunition_constant_list is array (ammunition_list) of ammunition_constant_type;
	type ammunition_variable_list is array (ammunition_mark) of ammunition_variable_type;

	ammunition_constant_data : constant ammunition_constant_list := (
		(ENTITY_AMMUNITION, to_unbounded_string ("Arrows"),     '^', COLOUR_RED, EFFECT_NORMAL, 11, 13, false, 23,  7, 67),
		(ENTITY_AMMUNITION, to_unbounded_string ("Bolts"),      '^', COLOUR_RED, EFFECT_NORMAL, 13, 23, false, 29,  5, 67),
		(ENTITY_AMMUNITION, to_unbounded_string ("Slingshots"), '^', COLOUR_RED, EFFECT_NORMAL,  5,  7, true,  43,  7, 67),
		(ENTITY_AMMUNITION, to_unbounded_string ("Jarids"),     '^', COLOUR_RED, EFFECT_NORMAL, 29, 37, true,   7,  7, 67)
	);

	ammunition_variable_data : ammunition_variable_list;

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Weapon
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

	type weapon_list is (
		IRON_SWORD,         IRON_GREATSWORD,    IRON_AXE,           IRON_BATTLEAXE,     IRON_SPEAR,         IRON_SHIELD,        IRON_MACE,          IRON_HAMMER,
		BRONZE_SWORD,       BRONZE_GREATSWORD,  BRONZE_AXE,         BRONZE_BATTLEAXE,   BRONZE_SPEAR,       BRONZE_SHIELD,      BRONZE_MACE,        BRONZE_HAMMER,
		BRASS_SWORD,        BRASS_GREATSWORD,   BRASS_AXE,          BRASS_BATTLEAXE,    BRASS_SPEAR,        BRASS_SHIELD,       BRASS_MACE,         BRASS_HAMMER
	);

	type weapon_mark is mod 72;

	type weapon_constant_type is new entity_constant_type with
	record
		dual_wield     : boolean := false;
		value          : natural := 0;
		weight         : natural := 0;
		attack_range   : natural := 0;
		defense_range  : natural := 0;
		distance_range : natural := 0;
	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,  11, 31,  7,  2,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Greatsword"),   'L', COLOUR_RED, EFFECT_BOLD,   false, 23, 67, 11,  3,  2),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Axe"),          'r', COLOUR_RED, EFFECT_NORMAL, true,  13, 43,  7,  2,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Battleaxe"),    'T', COLOUR_RED, EFFECT_BOLD,   false, 19, 73, 13,  2,  2),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Spear"),        'I', COLOUR_RED, EFFECT_BOLD,   false, 17, 53, 10,  4,  2),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Shield"),       'o', COLOUR_RED, EFFECT_NORMAL, true,  13, 37,  3,  9,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Mace"),         'i', COLOUR_RED, EFFECT_NORMAL, true,  11, 41,  8,  2,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Iron Hammer"),       't', COLOUR_RED, EFFECT_NORMAL, true,  13, 47,  7,  3,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Bronze Sword"),      'l', COLOUR_RED, EFFECT_NORMAL, true,  11, 31,  7,  2,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Bronze Greatsword"), 'L', COLOUR_RED, EFFECT_BOLD,   false, 23, 67, 11,  3,  2),
		(ENTITY_WEAPON, to_unbounded_string ("Bronze Axe"),        'r', COLOUR_RED, EFFECT_NORMAL, true,  13, 43,  7,  2,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Bronze Battleaxe"),  'T', COLOUR_RED, EFFECT_BOLD,   false, 19, 73, 13,  2,  2),
		(ENTITY_WEAPON, to_unbounded_string ("Bronze Spear"),      'I', COLOUR_RED, EFFECT_BOLD,   false, 17, 53, 10,  4,  2),
		(ENTITY_WEAPON, to_unbounded_string ("Bronze Shield"),     'o', COLOUR_RED, EFFECT_NORMAL, true,  13, 37,  3,  9,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Bronze Mace"),       'i', COLOUR_RED, EFFECT_NORMAL, true,  11, 41,  8,  2,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Bronze Hammer"),     't', COLOUR_RED, EFFECT_NORMAL, true,  13, 47,  7,  3,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Brass Sword"),       'l', COLOUR_RED, EFFECT_NORMAL, true,  11, 31,  7,  2,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Brass Greatsword"),  'L', COLOUR_RED, EFFECT_BOLD,   false, 23, 67, 11,  3,  2),
		(ENTITY_WEAPON, to_unbounded_string ("Brass Axe"),         'r', COLOUR_RED, EFFECT_NORMAL, true,  13, 43,  7,  2,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Brass Battleaxe"),   'T', COLOUR_RED, EFFECT_BOLD,   false, 19, 73, 13,  2,  2),
		(ENTITY_WEAPON, to_unbounded_string ("Brass Spear"),       'I', COLOUR_RED, EFFECT_BOLD,   false, 17, 53, 10,  4,  2),
		(ENTITY_WEAPON, to_unbounded_string ("Brass Shield"),      'o', COLOUR_RED, EFFECT_NORMAL, true,  13, 37,  3,  9,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Brass Mace"),        'i', COLOUR_RED, EFFECT_NORMAL, true,  11, 41,  8,  2,  1),
		(ENTITY_WEAPON, to_unbounded_string ("Brass Hammer"),      't', COLOUR_RED, EFFECT_NORMAL, true,  13, 47,  7,  3,  1)
	);

	weapon_variable_data : weapon_variable_list;

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Armour
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

	type armour_list is (
		IRON_HELMET,        IRON_CHESTPLATE,    IRON_GAUNTLETS,     IRON_GREAVES,       IRON_CUISSE,        IRON_FAULD,         IRON_GARDBRACE,     IRON_REREBRACE
	);

	type armour_mark is mod 72;

	type armour_constant_type is new entity_constant_type with
	record
		value         : natural := 0;
		weight        : natural := 0;
		defense_range : natural := 0;
	end record;

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

	type armour_constant_list is array (armour_list) of armour_constant_type;
	type armour_variable_list is array (armour_mark) of armour_variable_type;

	armour_constant_data : constant armour_constant_list := (
		(ENTITY_ARMOUR, to_unbounded_string ("Iron Helmet"),     'm', COLOUR_YELLOW, EFFECT_NORMAL, 11, 31,  7),
		(ENTITY_ARMOUR, to_unbounded_string ("Iron Chestplate"), 'M', COLOUR_YELLOW, EFFECT_BOLD,   23, 67, 11),
		(ENTITY_ARMOUR, to_unbounded_string ("Iron Gauntlets"),  'i', COLOUR_YELLOW, EFFECT_NORMAL, 13, 43,  7),
		(ENTITY_ARMOUR, to_unbounded_string ("Iron Greaves"),    'I', COLOUR_YELLOW, EFFECT_NORMAL, 19, 73, 13),
		(ENTITY_ARMOUR, to_unbounded_string ("Iron Cuisse"),     'Y', COLOUR_YELLOW, EFFECT_BOLD,   17, 53, 10),
		(ENTITY_ARMOUR, to_unbounded_string ("Iron Fauld"),      '-', COLOUR_YELLOW, EFFECT_NORMAL, 13, 37,  3),
		(ENTITY_ARMOUR, to_unbounded_string ("Iron Gardbrace"),  'v', COLOUR_YELLOW, EFFECT_NORMAL, 11, 41,  8),
		(ENTITY_ARMOUR, to_unbounded_string ("Iron Rerebrace"),  'V', COLOUR_YELLOW, EFFECT_NORMAL, 13, 47,  7)
	);

	armour_variable_data : armour_variable_list;

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Scroll
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Potion
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Consumable
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Note
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Plant
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

	type plant_list is (
		OAK_TREE,           PINE_TREE,          BIRCH_TREE,         ACACIA_TREE,        APPLE_TREE,         PEACH_TREE,         ORANGE_TREE,        PEAR_TREE,
		BUSH,               THORNY_BUSH,        TALL_GRASS,         REED
	);

	type plant_mark is mod 72;

	type plant_constant_type is new entity_constant_type with
	record
		health_limit : natural := 0;
	end record;

	type plant_variable_type is new entity_variable_type with
	record
		health : natural := 0;
	end record;

	type plant_constant_list is array (plant_list) of plant_constant_type;
	type plant_variable_list is array (plant_mark) of plant_variable_type;

	plant_constant_data : constant plant_constant_list := (
		(ENTITY_PLANT, to_unbounded_string ("Oak Tree"),    'T', COLOUR_GREEN, EFFECT_BOLD,   11),
		(ENTITY_PLANT, to_unbounded_string ("Pine Tree"),   'T', COLOUR_GREEN, EFFECT_BOLD,   23),
		(ENTITY_PLANT, to_unbounded_string ("Birch Tree"),  'T', COLOUR_GREEN, EFFECT_BOLD,   13),
		(ENTITY_PLANT, to_unbounded_string ("Acacia Tree"), 'T', COLOUR_GREEN, EFFECT_BOLD,   19),
		(ENTITY_PLANT, to_unbounded_string ("Apple Tree"),  'T', COLOUR_GREEN, EFFECT_BOLD,   17),
		(ENTITY_PLANT, to_unbounded_string ("Peach Tree"),  'T', COLOUR_GREEN, EFFECT_BOLD,   13),
		(ENTITY_PLANT, to_unbounded_string ("Orange Tree"), 'T', COLOUR_GREEN, EFFECT_BOLD,   11),
		(ENTITY_PLANT, to_unbounded_string ("Pear Tree"),   'T', COLOUR_GREEN, EFFECT_BOLD,   13),
		(ENTITY_PLANT, to_unbounded_string ("Bush"),        '&', COLOUR_GREEN, EFFECT_NORMAL,  5),
		(ENTITY_PLANT, to_unbounded_string ("Thorny Bush"), '&', COLOUR_GREEN, EFFECT_NORMAL,  7),
		(ENTITY_PLANT, to_unbounded_string ("Tall Grass"),  '%', COLOUR_GREEN, EFFECT_NORMAL,  3),
		(ENTITY_PLANT, to_unbounded_string ("Reed"),        '%', COLOUR_GREEN, EFFECT_NORMAL,  3)
	);

	plant_variable_data : plant_variable_list;

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Animal
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Goblin
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

	type goblin_list is (
		GOBLIN_SLAVE,       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 := 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;

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Player
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Gameplay
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Terminal
-- -- Currently constant, gonna use either my xurses library or <termios.h> C bindings.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

	type procedure_pointer is access procedure;

	type action_data is array (signal_list) of procedure_pointer;

	active : boolean          := true;
	signal : character        := SIGNAL_IDLE;
	width  : natural          := 120;
	height : natural          := 40;
	buffer : unbounded_string := null_unbounded_string;

	procedure action_idle is
	begin
		null;
	end action_idle;

	procedure action_exit is
	begin
		active := false;
	end action_exit;

	action_list : action_data := (others => action_idle'access);

	procedure bind (
		key : character         := SIGNAL_IDLE;
		act : procedure_pointer := action_idle'access
	) is
	begin
		action_list (character'pos (key)) := act;
	end bind;

	procedure unbind (
		key : character := SIGNAL_IDLE
	) is
	begin
		action_list (character'pos (key)) := action_idle'access;
	end unbind;

	procedure action_draw is
	begin
		buffer := buffer & format_symbol ('@', COLOUR_RED, EFFECT_BOLD);
	end action_draw;

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-- Main
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

begin

	bind (SIGNAL_Q, action_exit'access);
	bind (SIGNAL_E, action_draw'access);

	loop
		exit when active = false;
		buffer := to_unbounded_string (escape & "[H");
		signal := CANCEL;
		for y in 1 .. height
		loop
			for x in 1 .. width
			loop
				buffer := buffer & format_symbol ('X', COLOUR_GREY, EFFECT_BOLD);
			end loop;
			buffer := buffer & carriage_return & line_feed;
		end loop;
		put (to_string (buffer)); -- still reachable
		get_immediate (signal);
		action_list (character'pos (signal)).all;
	end loop;

	--~for this in magic_list
	--~loop
		--~put_line (format_symbol (magic_constant_data (this).symbol, magic_constant_data (this).colour, magic_constant_data (this).effect)
		         --~& " "
		         --~& to_string (magic_constant_data (this).name));
	--~end loop;

	--~for this in item_list
	--~loop
		--~put_line (format_symbol (item_constant_data (this).symbol, item_constant_data (this).colour, item_constant_data (this).effect)
		         --~& " "
		         --~& to_string (item_constant_data (this).name));
	--~end loop;

	--~for this in ammunition_list
	--~loop
		--~put_line (format_symbol (ammunition_constant_data (this).symbol, ammunition_constant_data (this).colour, ammunition_constant_data (this).effect)
		         --~& " "
		         --~& to_string (ammunition_constant_data (this).name));
	--~end loop;

	--~for this in weapon_list
	--~loop
		--~put_line (format_symbol (weapon_constant_data (this).symbol, weapon_constant_data (this).colour, weapon_constant_data (this).effect)
		         --~& " "
		         --~& to_string (weapon_constant_data (this).name));
	--~end loop;

	--~for this in armour_list
	--~loop
		--~put_line (format_symbol (armour_constant_data (this).symbol, armour_constant_data (this).colour, armour_constant_data (this).effect)
		         --~& " "
		         --~& to_string (armour_constant_data (this).name));
	--~end loop;

	--~for this in plant_list
	--~loop
		--~put_line (format_symbol (plant_constant_data (this).symbol, plant_constant_data (this).colour, plant_constant_data (this).effect)
		         --~& " "
		         --~& to_string (plant_constant_data (this).name));
	--~end loop;

	return 0;

end xabina;