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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;

package body core is

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	procedure screen_delete is
	begin
		ada.text_io.put (escape & "[2J");
	end screen_delete;

	procedure screen_offset is
	begin
		ada.text_io.put (escape & "[H");
	end screen_offset;

	procedure screen_hide_cursor is
	begin
		ada.text_io.put (escape & "[?25l");
	end screen_hide_cursor;

	procedure screen_show_cursor is
	begin
		ada.text_io.put (escape & "[?25h");
	end screen_show_cursor;

	procedure screen_new_line is
	begin
		ada.text_io.put (carriage_return & line_feed);
	end screen_new_line;

	procedure render_character (symbol : character     := ' ';
	                            colour : character     := '7';
	                            effect : character     := '0';
	                            y      : screen_height := 0;
	                            x      : screen_width  := 0) is
	begin
		screen_symbol (y, x) := symbol;
		screen_colour (y, x) := colour;
		screen_effect (y, x) := effect;
	end render_character;

	procedure render_buffer is
		format : string (1 .. 12) := escape & "[E;3CmS" & escape & "[0m";
	begin
		screen_offset;
		for y in screen_height
		loop
			for x in screen_width
			loop
				format (8) := screen_symbol (y, x);
				format (6) := screen_colour (y, x);
				format (3) := screen_effect (y, x);
				ada.text_io.put (format);
			end loop;
			screen_new_line;
		end loop;
	end render_buffer;

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end core;