-- Copyright (c) 2024 - Ognjen 'xolatile' Milan Robovic
--
-- GNU General Public Licence (version 3 or later)

pragma ada_2012;

with core, ui, effect, attribute, skill, resource, faction, deity, material, magic, equipment, unit, construction, chad, world;

use type core.cursor_code;
use type core.signal_code;
use type core.point;

procedure main is

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

	type view is (
		map_preview_panel,
		status_preview_panel,
		text_box_panel,
		fullscreen
	);

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

	procedure swap_map_preview_panel;
	procedure swap_status_preview_panel;
	procedure swap_text_box_panel;
	procedure swap_fullscreen;
	procedure ui_main_style;
	procedure zoom_in;
	procedure zoom_out;

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

	signal_list : constant array (core.signal_code) of access procedure := (
		core.signal_up          => world.player_up'access,
		core.signal_down        => world.player_down'access,
		core.signal_left        => world.player_left'access,
		core.signal_right       => world.player_right'access,
		core.signal_v           => ui_main_style'access,
		core.signal_kp_add      => zoom_in'access,
		core.signal_kp_subtract => zoom_out'access,
		core.signal_f1          => world.resource_cheat_1'access,
		core.signal_f2          => world.resource_cheat_2'access,
		core.signal_f3          => world.resource_cheat_3'access,
		core.signal_f4          => world.resource_cheat_4'access,
		core.signal_f5          => world.resource_cheat_5'access,
		core.signal_f6          => world.resource_cheat_6'access,
		core.signal_f7          => world.reveal_map'access,
		core.signal_f8          => world.restore_points'access,
		others                  => core.idle_skip'access
	);

	view_show : array (view) of access procedure := (
		swap_map_preview_panel'access,
		swap_status_preview_panel'access,
		swap_text_box_panel'access,
		swap_fullscreen'access
	);

	view_icon : array (view) of core.sprite := (others => (others => 0));
	view_list : array (view) of boolean     := (fullscreen => false, others => true);

	view_text : constant array (view) of access string := (
		new string'("Toggle map preview panel."),
		new string'("Toggle status preview panel."),
		new string'("Toggle text box panel."),
		new string'("Toggle fullscreen or windowed mode.")
	);

	game_title   :                        core.sprite;
	game_preview : array (world.biome) of core.sprite;

	switch : natural     := 0;
	choose : world.biome := world.grass;

	view_source_code : natural := 17;

	source_code : constant array (0 .. 22) of access string := (
		new string'(core.folder & "/source/ai.adb"),
		new string'(core.folder & "/source/ai.ads"),
		new string'(core.folder & "/source/attribute.ads"),
		new string'(core.folder & "/source/chad.ads"),
		new string'(core.folder & "/source/construction.ads"),
		new string'(core.folder & "/source/core.adb"),
		new string'(core.folder & "/source/core.ads"),
		new string'(core.folder & "/source/deity.ads"),
		new string'(core.folder & "/source/effect.ads"),
		new string'(core.folder & "/source/equipment.ads"),
		new string'(core.folder & "/source/faction.ads"),
		new string'(core.folder & "/source/magic.ads"),
		new string'(core.folder & "/source/main.adb"),
		new string'(core.folder & "/source/material.ads"),
		new string'(core.folder & "/source/might.ads"),
		new string'(core.folder & "/source/ray.ads"),
		new string'(core.folder & "/source/resource.ads"),
		new string'(core.folder & "/source/skill.ads"),
		new string'(core.folder & "/source/ui.adb"),
		new string'(core.folder & "/source/ui.ads"),
		new string'(core.folder & "/source/unit.ads"),
		new string'(core.folder & "/source/world.adb"),
		new string'(core.folder & "/source/world.ads")
	);

	side_panel      : integer := 0;
	preview_width   : integer := 0;
	preview_height  : integer := 0;
	text_box_height : integer := 0;

	player : chad.information := (
		skills => (skill.archery, skill.athletics, skill.tactics, skill.aerokinesis, skill.logistics, skill.leadership, skill.estates, skill.mysticism),
		points => (others => (1, 3)),
		--
		equipments => (equipment.chest     => equipment.iron_chestplate,
		               equipment.head      => equipment.iron_helmet,
		               equipment.hands     => equipment.iron_gauntlets,
		               equipment.feet      => equipment.iron_greaves,
		               equipment.main_hand => equipment.iron_sword,
		               others              => equipment.none),
		others => <>
	);

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

	procedure swap_map_preview_panel    is begin view_list (map_preview_panel)    := not view_list (map_preview_panel);    end swap_map_preview_panel;
	procedure swap_status_preview_panel is begin view_list (status_preview_panel) := not view_list (status_preview_panel); end swap_status_preview_panel;
	procedure swap_text_box_panel       is begin view_list (text_box_panel)       := not view_list (text_box_panel);       end swap_text_box_panel;
	procedure swap_fullscreen           is begin view_list (fullscreen)           := not view_list (fullscreen);           end swap_fullscreen;

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

	procedure ui_main_style is
	begin
		ui.active := ui.style'val ((ui.style'pos (ui.active) + 1) mod ui.style_count);
	end ui_main_style;

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

	procedure zoom_in  is begin core.zoom := 2; end zoom_in;
	procedure zoom_out is begin core.zoom := 1; end zoom_out;

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

	procedure player_information is
		player_1 : chad.information renames world.map.chads (1);
		--
		offset : constant integer := 8;
		x      : constant integer := preview_width + core.icon;
		y      : constant integer := core.icon;
		width  : constant integer := side_panel - 2 * core.icon;
		height : constant integer := chad.view_height + 8 * core.icon + 3 * core.base + 2 * offset;
		more   : constant natural := 10;
		less   : constant natural := 5;
		side   : constant integer := chad.view_width + attribute.count * core.icon;
		at_x   :          integer := x + offset;
		at_y   :          integer := y + offset;
	begin
		ui.draw_frame    ("--", x, y, width, height);
		ui.draw_sprite   (chad.view (player_1.index), chad.description (player_1.index).name.all, at_x, at_y, 0);
		ui.draw_text_box (at_x + chad.view_width, at_y, width - chad.view_width - 2 * offset, core.icon);
		ui.write         (chad.description (player_1.index).name.all, at_x + chad.view_width + less, at_y + less);
		--
		ui.draw_text_box (at_x + side, at_y + 1 * core.icon, width - side - 2 * offset, core.icon);
		ui.draw_text_box (at_x + side, at_y + 2 * core.icon, width - side - 2 * offset, core.icon);
		--
		ui.write (chad.description (player_1.index).title.all, at_x + side + more, at_y + 1 * core.icon + more, code => true);
		ui.write ("Level" & player_1.level'image,              at_x + side + more, at_y + 2 * core.icon + more, code => true);
		--
		at_x := x + chad.view_width + offset;
		at_y := y + core.icon + offset;
		--
		for index in attribute.enumeration loop
			ui.draw_icon     (attribute.icon (index), attribute.description (index).text.all, at_x, at_y);
			ui.draw_text_box (at_x, at_y + core.icon, core.icon, core.icon);
			ui.write         (player_1.attributes (index).value'image, at_x + less, at_y + core.icon + more, code => true);
			--
			at_x := at_x + core.icon;
		end loop;
		--
		at_x := x + offset;
		at_y := y + offset + chad.view_height;
		--
		ui.draw_separator (at_x, at_y, width - 2 * offset);
		--
		at_y := at_y + core.base + core.icon;
		--
		ui.draw_tiny_fill_bar (at_x, at_y + 0 * core.icon, side, float (player_1.health.value)   / float (player_1.health.limit),   (127, 0, 0, 255));
		ui.draw_tiny_fill_bar (at_x, at_y + 1 * core.icon, side, float (player_1.mana.value)     / float (player_1.mana.limit),     (0, 0, 127, 255));
		ui.draw_tiny_fill_bar (at_x, at_y + 2 * core.icon, side, float (player_1.movement.value) / float (player_1.movement.limit), (0, 127, 0, 255));
		--
		ui.draw_text_box (at_x + side, at_y - core.icon, width - side - 2 * offset, core.icon);
		ui.draw_text_box (at_x + side, at_y,             width - side - 2 * offset, core.icon);
		ui.draw_text_box (at_x + side, at_y + core.icon, width - side - 2 * offset, core.icon);
		--
		ui.write ("Health",   at_x + side + more, at_y - core.icon + more, code => true);
		ui.write ("Mana",     at_x + side + more, at_y             + more, code => true);
		ui.write ("Movement", at_x + side + more, at_y + core.icon + more, code => true);
		--
		ui.write (player_1.health.value'image   & " /" & player_1.health.limit'image,   at_x + core.icon, at_y - core.icon + more, code => true);
		ui.write (player_1.mana.value'image     & " /" & player_1.mana.limit'image,     at_x + core.icon, at_y             + more, code => true);
		ui.write (player_1.movement.value'image & " /" & player_1.movement.limit'image, at_x + core.icon, at_y + core.icon + more, code => true);
		--
		at_y := at_y + 2 * core.icon;
		--
		ui.draw_separator (at_x, at_y, width - 2 * offset);
		--
		at_y := at_y + core.base;
		--
		for index in equipment.kind loop
			if equipment.enumeration'pos (player_1.equipments (index)) /= equipment.enumeration'pos (equipment.none) then
				ui.draw_overicon (data => equipment.icon (player_1.equipments (index)),
				                  text => equipment.description (player_1.equipments (index)).name.all,
				                  x    => at_x + equipment.kind'pos (index) * core.icon,
				                  y    => at_y);
			else
				ui.draw_overicon (data => equipment.slot (index),
				                  text => "Slot '" & core.lowercase (equipment.kind (index)'image) & "' is empty.",
				                  x    => at_x + equipment.kind'pos (index) * core.icon,
				                  y    => at_y);
			end if;
		end loop;
		--
		ui.draw_text_box (x      => at_x + (equipment.kind'pos (equipment.kind'last) + 1) * core.icon,
		                  y      => at_y,
		                  width  => width - (equipment.kind'pos (equipment.kind'last) + 1) * core.icon - 2 * offset,
		                  height => core.icon);
		--
		ui.write (text => "Equipment",
		          x    => at_x + (equipment.kind'pos (equipment.kind'last) + 1) * core.icon + more,
		          y    => at_y + more,
		          code => true);
		--
		at_y := at_y + core.icon;
		--
		ui.draw_text_box (at_x + side, at_y, width - side - 2 * offset, core.icon);
		ui.write ("Skills", at_x + side + more, at_y + more, code => true);
		--
		for index in 0 .. chad.skill_limit - 1 loop
			ui.draw_icon (skill.icon (player_1.skills (index)), skill.description (player_1.skills (index)).text.all, at_x + index * core.icon, at_y);
			--~ui.write     (player_1.points (index).value'image, at_x + index * core.icon + more, at_y + more, code => true);
		end loop;
		--
		at_y := at_y + core.icon;
		--
		ui.draw_separator (at_x, at_y, width - 2 * offset);
		--
		at_y := at_y + core.base;
		--
		ui.draw_text_box (at_x + side, at_y, width - side - 2 * offset, 3 * core.icon);
		ui.write ("Inventory", at_x + side + more, at_y + core.icon + more, code => true);
		--
		for index_y in 0 .. 2 loop
			for index_x in 0 .. 7 loop
				ui.draw_icon (data => equipment.icon (player_1.items (8 * index_y + index_x)),
				              text => equipment.description (player_1.items (8 * index_y + index_x)).name.all,
				              x    => at_x + index_x * core.icon,
				              y    => at_y + index_y * core.icon);
			end loop;
		end loop;
	end player_information;

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

begin

	core.dash;
	core.echo (core.comment, "Copyright (C) 2024 -- Ognjen 'xolatile' Milan Robovic");
	core.echo (core.comment, "Version -- 1.0.0");
	core.echo (core.comment, "License -- GNU/GPLv3+");
	core.echo (core.comment, "Xorana is free software, you can redistribute it and modify it under the terms of the GNU General Public License by Free Software Foundation.");
	core.dash;

	core.initialize;

	ui.active := ui.main;

	ui.configure;

	--~core.play (core.import_song (core.c_string (core.folder & "/song/main_menu.ogg")).index);

	core.echo (core.comment, "Configuring" & attribute.count'image & " attribute components...");
	--
	for index in attribute.enumeration loop
		attribute.icon (index) := core.import_sprite (core.folder & "/icon/attribute/" & core.lowercase (attribute.enumeration'image (index)) & ".png", 1, 1);
	end loop;

	core.echo (core.comment, "Configuring" & skill.count'image & " skill components...");
	--
	for index in skill.enumeration loop
		skill.icon (index) := core.import_sprite (core.folder & "/icon/skill/" & core.lowercase (skill.enumeration'image (index)) & ".png", 1, 1);
	end loop;

	core.echo (core.comment, "Configuring" & resource.count'image & " resource components...");
	--
	for index in resource.enumeration loop
		resource.icon (index) := core.import_sprite (core.folder & "/icon/resource/" & core.lowercase (resource.enumeration'image (index)) & ".png", 1, 1);
	end loop;

	core.echo (core.comment, "Configuring" & magic.count'image & "  magic components...");
	--
	for index in magic.enumeration loop
		declare folder : constant string := core.lowercase (magic.school'image (magic.description (index).kind));
		        file   : constant string := core.lowercase (magic.enumeration'image (index));
		begin
			magic.view (index) := core.import_sprite (core.folder & "/view/magic/" & folder & "/" & file & ".png", 1, 1);
		end;
	end loop;

	core.echo (core.comment, "Configuring" & material.count'image & " material components...");
	--
	for index in material.enumeration loop
		material.icon (index) := core.import_sprite (core.folder & "/icon/material/" & core.lowercase (material.enumeration'image (index)) & ".png", 1, 1);
	end loop;

	core.echo (core.comment, "Configuring" & equipment.count'image & " equipment components...");
	--
	for index in equipment.enumeration loop
		declare folder : constant string := core.lowercase (equipment.kind'image (equipment.description (index).slot));
		        file   : constant string := core.lowercase (equipment.enumeration'image (index));
		begin
			equipment.sprite (index) := core.import_sprite (core.folder & "/game/equipment/" & folder & "/" & file & ".png", 4, 6);
			equipment.icon   (index) := core.import_sprite (core.folder & "/icon/equipment/" & folder & "/" & file & ".png", 1, 1);
		end;
	end loop;
	--
	for index in equipment.kind loop
		declare file : constant string := core.lowercase (equipment.kind'image (index));
		begin
			equipment.slot (index) := core.import_sprite (core.folder & "/icon/engine/" & file & ".png", 1, 1);
		end;
	end loop;

	core.echo (core.comment, "Configuring" & unit.count'image & " unit components...");
	--
	for index in faction.fairy .. faction.imp loop
		unit.base (index) := core.import_sprite (core.folder & "/game/unit/" & core.lowercase (faction.enumeration'image (index)) & "/base.png", 4, 6);
	end loop;

	core.echo (core.comment, "Configuring" & deity.count'image & " deity components...");
	--
	for index in deity.enumeration loop
		deity.sprite (index) := core.import_sprite (core.folder & "/game/deity/" & deity.enumeration'image (index) & ".png", 4, 1);
	end loop;

	core.echo (core.comment, "Configuring" & construction.count'image & "construction components...");
	--
	for index in construction.enumeration loop
		declare folder : constant string  := core.lowercase (faction.enumeration'image (construction.description (index).kind));
		        file   : constant string  := core.lowercase (construction.enumeration'image (index));
		        frames : constant integer := construction.description (index).frames;
		begin
			construction.sprite (index) := core.import_sprite (core.folder & "/game/construction/" & folder & "/" & file & ".png", frames, 1);
		end;
	end loop;

	core.echo (core.comment, "Configuring" & chad.count'image & "chad components...");
	--
	for index in chad.enumeration loop
		chad.sprite (index) := core.import_sprite (core.folder & "/game/chad/" & core.lowercase (chad.enumeration'image (index)) & ".png", 4, 6);
		chad.view   (index) := core.import_sprite (core.folder & "/view/chad/" & core.lowercase (chad.enumeration'image (index)) & ".png", 1, 1);
	end loop;

	world.configure;
	--~ai.configure;

	world.make     (world.grass, 640, 480, 8);
	world.add_chad (player);

	core.dash;
	core.echo (core.success, "Successfully initialized game data, entering main gameplay loop.");
	core.dash;

	for index in view loop
		view_icon (index) := core.import_sprite (core.folder & "/icon/engine/" & core.lowercase (view'image (index)) & ".png", 1, 2);
	end loop;

	game_title := core.import_sprite (core.folder & "/ui/game_title.png", 1, 1);

	for index in world.biome loop
		game_preview (index) := core.import_sprite (core.folder & "/ui/preview/" & core.lowercase (world.biome'image (index)) & "land.png", 1, 1);
	end loop;

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

	introduction_loop: loop
		core.synchronize;
		--
		exit when core.signal_mode = core.signal_space or core.cursor_mode = core.cursor_right;
		--
		case core.signal_mode is
			when core.signal_none  => null;
			when core.signal_space => null;
			when others            => switch := (switch + 1) mod world.biome_count;
			                          choose := world.biome'val (switch);
		end case;
		--
		core.draw (game_preview (choose), core.center_x (game_preview (choose).width * 2), core.center_y (game_preview (choose).height * 2), factor => 2);
		core.draw (game_title,            core.center_x (game_title.width            * 2), core.center_y (game_title.height            * 2), factor => 2);
		--
		ui.write ("[-- Press Spacebar or RMB to continue]", 0, core.center_y (24), (102, 102, 102, 255));
	end loop introduction_loop;

	core.cursor_mode := core.cursor_none;

	--~main_menu_loop: loop
		--~core.synchronize;
		--~--
		--~exit when core.signal_mode = core.signal_space or core.cursor_mode = core.cursor_right;
		--~--
		--~declare source_code_data : core.string_box_data;
		--~begin
			--~core.import_text (source_code_data, source_code (view_source_code).all);
			--~--
			--~if core.cursor_mode = core.cursor_left then
				--~view_source_code := (view_source_code + 1) mod 23;
				--~core.cursor_mode := core.cursor_none;
				--~core.wheel := 0.0;
			--~end if;
			--~--
			--~ui.write_ada_code (source_code_data, 0, integer (core.wheel) * 30);
		--~end;
	--~end loop main_menu_loop;

	--~core.cursor_mode := core.cursor_none;

	world.load ("heyo");

	ui.active := ui.style'val (faction.enumeration'pos (chad.description (player.index).kind) + 1);

	gameplay_loop: loop
		core.synchronize;
		--
		exit when core.engine_active = false;
		--
		if not view_list (status_preview_panel) then
			side_panel := 0;
		else
			side_panel := 480;
		end if;
		--
		preview_width   := core.window_width  - side_panel;
		preview_height  := core.window_height - text_box_height;
		text_box_height := 32;
		--
		world.draw;
		--
		if view_list (map_preview_panel) then
			ui.draw_menu (0, 0, preview_width, preview_height);
		end if;
		--
		if view_list (status_preview_panel) then
			ui.draw_tiny_menu (preview_width, 0, side_panel, preview_height);
			--
			player_information;
			--
			ui.draw_end_turn_button (x => core.window_width - side_panel + side_panel / 2 - core.icon,
			                         y => core.window_height - core.icon - text_box_height - 106 - 2 * core.icon);
			--
			ui.draw_console_box (x      => core.window_width - core.icon - (side_panel - 2 * core.icon),
			                     y      => core.window_height - core.icon - text_box_height - 106,
			                     width  => side_panel - 2 * core.icon,
			                     height => 106);
			--~ui.draw_state_box (preview_width + 32, 32);
		end if;
		--
		if view_list (text_box_panel) then
			ui.draw_help_box (0, core.window_height - text_box_height, core.window_width - core.icon * (view'pos (view'last) + 1), text_box_height);
		--
			ui.write (core.framerate'image, core.window_width - core.icon * (view'pos (view'last) + 1) - 64, core.window_height - 27);
		end if;
		--
		for index in view loop
			ui.draw_frame (description => view_text (index).all,
			               x           => core.window_width - core.icon * (view'pos (view'last) + 1) + core.icon * view'pos (index),
			               y           => core.window_height - core.icon,
			               width       => core.icon,
			               height      => core.icon,
			               action      => view_show (index));
			--
			core.draw (data   => view_icon (index),
			           x      => core.window_width - core.icon * (view'pos (view'last) + 1) + core.icon * view'pos (index),
			           y      => core.window_height - core.icon,
			           ignore => true,
			           u      => 0,
			           v      => boolean'pos (view_list (index)) * core.icon,
			           factor => 1);
		end loop;
		--
		for index in resource.enumeration loop
			ui.draw_icon  (resource.icon (index), resource.description (index).text.all, (preview_width - 6 * core.icon * resource.count) / 2 + (6 * core.icon) * resource.enumeration'pos (index), core.base);
			ui.draw_frame (resource.description (index).text.all, (preview_width - 6 * core.icon * resource.count) / 2 + (6 * core.icon) * resource.enumeration'pos (index) + core.icon, core.base, 5 * core.icon, core.icon);
			--
			ui.write (text => world.map.chads (1).resources (index).value'image & " /" & world.map.chads (1).resources (index).limit'image,
			          x    => (preview_width - 6 * core.icon * resource.count) / 2 + (6 * core.icon) * resource.enumeration'pos (index) + core.icon - 1,
			          y    => core.base + 7,
			          size => 18);
		end loop;
		--
		declare move_x : integer := (preview_width - core.icon * material.count) / 2;
		begin
			for index in material.enumeration loop
				if world.map.chads (1).materials (index).value > 0 then
					ui.draw_icon     (material.icon (index), material.description (index).name.all, move_x, core.base + core.icon);
					ui.draw_text_box (move_x, core.base + core.icon + core.icon, core.icon, core.icon);
					ui.write         (world.map.chads (1).materials (index).value'image, move_x, core.base + core.icon + core.icon + 8, (255, 255, 255, 255), 15, true);
					--
					move_x := move_x + core.icon;
				end if;
			end loop;
		end;
		--
		signal_list (core.signal_mode).all;
		--
		core.camera.x := world.map.chads (1).x;
		core.camera.y := world.map.chads (1).y;
		--
		--~world.draw_performance_box;
		--
		ui.synchronize;
	end loop gameplay_loop;

	world.save ("heyo");

	--~world.mapshot (core.folder & "/mapshot.png");

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

	core.deinitialize;

	core.dash;

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

end main;