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-- Copyright (c) 2023 - Ognjen 'xolatile' Milan Robovic
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-- 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 2 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;

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

function xabina return integer is

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-- System
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	type subrange is
	record
		minimum : natural := 0;
		average : natural := 0;
		maximum : natural := 0;
	end record;

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

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

	type entity_id is (
		ENTITY_NONE,        ENTITY_MENU,        ENTITY_MAP,         ENTITY_ITEM,        ENTITY_PLANT,       ENTITY_ANIMAL,      ENTITY_GOBLIN,      ENTITY_PLAYER
	);

	type map_id is (
		MAP_NONE,           MAP_VOID,           MAP_WALL,           MAP_FLOOR,          MAP_HOLE,           MAP_STAIRS_DOWN,    MAP_STAIRS_UP,      MAP_DOOR
	);

	type item_id is (
		ITEM_NONE,          ITEM_AMMUNITION,    ITEM_WEAPON,        ITEM_ARMOUR,        ITEM_SCROLL,        ITEM_POTION,        ITEM_CONSUMABLE,    ITEM_NOTE
	);

	type plant_id is (
		PLANT_NONE,         PLANT_GRASS,        PLANT_REED,         PLANT_BUSH,         PLANT_APPLE_TREE,   PLANT_LEMON_TREE,   PLANT_OAK_TREE,     PLANT_PINE_TREE
	);

	type animal_id is (
		ANIMAL_NONE,        ANIMAL_RAT,         ANIMAL_BAT,         ANIMAL_SPIDER,      ANIMAL_LIZARD,      ANIMAL_SNAIL,       ANIMAL_WORM,        ANIMAL_MOLE
	);

	type goblin_id is (
		GOBLIN_NONE,        GOBLIN_WORKER,      GOBLIN_WARRIOR,     GOBLIN_BOAR_RIDER,  GOBLIN_SHAMAN,      GOBLIN_CHIEF,       GOBLIN_KING,        GOBLIN_OGRE
	);

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-- Entity
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	type entity_constant_type is tagged
	record
		entity  : entity_id        := ENTITY_NONE;           -- Entity identifier.
		name    : unbounded_string := null_unbounded_string; -- Entity general name.
		code    : character        := ' ';                   -- Entity ASCII character representation.
		colour  : colour_id        := COLOUR_WHITE;          -- Entity VT100 escape sequence colour.
		effect  : effect_id        := EFFECT_NORMAL;         -- Entity VT100 escape sequence effect.
		collide : boolean          := false;                 -- Entity collision information.
	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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-- 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_id is (
		STONE_WALL,         WOODEN_WALL,        STONE_FLOOR,        WOODEN_FLOOR
	);

	type map_constant_type is new entity_constant_type with
	record
		map     : map_id  := MAP_NONE;
		trigger : natural := 0;
	end record;

	type map_list is array (map_list_id) of map_constant_type;

	map_data : constant map_list := (
		(ENTITY_MAP, to_unbounded_string ("Stone Wall"),   '#', COLOUR_GREY,   EFFECT_BOLD,   true,  MAP_WALL,  0),
		(ENTITY_MAP, to_unbounded_string ("Wooden Wall"),  '#', COLOUR_YELLOW, EFFECT_NORMAL, true,  MAP_WALL,  0),
		(ENTITY_MAP, to_unbounded_string ("Stone Floor"),  '.', COLOUR_GREY,   EFFECT_BOLD,   false, MAP_FLOOR, 0),
		(ENTITY_MAP, to_unbounded_string ("Wooden Floor"), '.', COLOUR_YELLOW, EFFECT_NORMAL, false, MAP_FLOOR, 0)
	);

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

	type goblin_variable_type is new entity_variable_type with
	record
		goblin  : goblin_id := GOBLIN_NONE; -- Index of 'goblin_data'.
		health  : natural   := 0;
		armour  : natural   := 0;
		mana    : natural   := 0;
		stamina : natural   := 0;
		weapon  : item_id   := ITEM_NONE;
	end record;

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-- Gameplay
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begin

	for this in map_list_id
	loop
		put_line ("> " & to_string (map_data (this).name));
	end loop;

	return 0;

end xabina;