/*
 * Copyright (C) 2021  Christopher J. Howard
 *
 * This file is part of Antkeeper source code.
 *
 * Antkeeper source code 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.
 *
 * Antkeeper source code 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with Antkeeper source code.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "game/states/language-menu.hpp"
#include "game/states/options-menu.hpp"
#include "application.hpp"
#include "scene/text.hpp"
#include "render/passes/clear-pass.hpp"
#include "debug/logger.hpp"
#include "game/fonts.hpp"
#include "game/menu.hpp"

namespace game {
namespace state {
namespace language_menu {

static void update_text_content(game::context* ctx)
{
	auto [language_name, language_value] = ctx->menu_item_texts[0];
	auto [back_name, back_value] = ctx->menu_item_texts[1];
	
	language_name->set_content((*ctx->strings)["language_menu_language"]);
	language_value->set_content((*ctx->strings)["language_name"]);
	back_name->set_content((*ctx->strings)["back"]);
}

void enter(game::context* ctx)
{
	ctx->ui_clear_pass->set_cleared_buffers(true, true, false);
	
	// Construct menu item texts
	scene::text* language_name_text = new scene::text();
	scene::text* language_value_text = new scene::text();
	scene::text* back_text = new scene::text();
	
	// Build list of menu item texts
	ctx->menu_item_texts.push_back({language_name_text, language_value_text});
	ctx->menu_item_texts.push_back({back_text, nullptr});
	
	// Set content of menu item texts
	update_text_content(ctx);
	
	// Init menu item index
	game::menu::init_menu_item_index(ctx, "language");
	
	game::menu::update_text_color(ctx);
	game::menu::update_text_font(ctx);
	game::menu::align_text(ctx);
	game::menu::update_text_tweens(ctx);
	game::menu::add_text_to_ui(ctx);
	
	// Construct menu item callbacks
	auto next_language_callback = [ctx]()
	{
		// Increment language index
		++ctx->language_index;
		if (ctx->language_index >= ctx->language_count)
			ctx->language_index = 0;
		
		// Find corresponding language code and strings
		ctx->language_code = (*ctx->string_table)[0][ctx->language_index + 2];
		ctx->strings = &ctx->string_table_map[ctx->language_code];
		
		// Update language in config
		(*ctx->config)["language"] = ctx->language_code;
		
		ctx->logger->log("Language changed to \"" + ctx->language_code + "\"");
		
		// Reload fonts
		ctx->logger->push_task("Reloading fonts");
		try
		{
			game::load_fonts(ctx);
		}
		catch (...)
		{
			ctx->logger->pop_task(EXIT_FAILURE);
		}
		ctx->logger->pop_task(EXIT_SUCCESS);
		
		game::menu::update_text_font(ctx);
		update_text_content(ctx);
		game::menu::refresh_text(ctx);
		game::menu::align_text(ctx);
		game::menu::update_text_tweens(ctx);
	};
	auto previous_language_callback = [ctx]()
	{
		// Increment language index
		--ctx->language_index;
		if (ctx->language_index < 0)
			ctx->language_index = ctx->language_count - 1;
		
		// Find corresponding language code and strings
		ctx->language_code = (*ctx->string_table)[0][ctx->language_index + 2];
		ctx->strings = &ctx->string_table_map[ctx->language_code];
		
		// Update language in config
		(*ctx->config)["language"] = ctx->language_code;
		
		ctx->logger->log("Language changed to \"" + ctx->language_code + "\"");
		
		// Reload fonts
		ctx->logger->push_task("Reloading fonts");
		try
		{
			game::load_fonts(ctx);
		}
		catch (...)
		{
			ctx->logger->pop_task(EXIT_FAILURE);
		}
		ctx->logger->pop_task(EXIT_SUCCESS);
		
		game::menu::update_text_font(ctx);
		update_text_content(ctx);
		game::menu::refresh_text(ctx);
		game::menu::align_text(ctx);
		game::menu::update_text_tweens(ctx);
	};
	auto select_back_callback = [ctx]()
	{
		application::state next_state;
		next_state.name = "options_menu";
		next_state.enter = std::bind(game::state::options_menu::enter, ctx);
		next_state.exit = std::bind(game::state::options_menu::exit, ctx);
		ctx->app->change_state(next_state);
	};
	
	// Build list of menu select callbacks
	ctx->menu_select_callbacks.push_back(next_language_callback);
	ctx->menu_select_callbacks.push_back(select_back_callback);
	
	// Build list of menu left callbacks
	ctx->menu_left_callbacks.push_back(previous_language_callback);
	ctx->menu_left_callbacks.push_back(nullptr);
	
	// Build list of menu right callbacks
	ctx->menu_right_callbacks.push_back(next_language_callback);
	ctx->menu_right_callbacks.push_back(nullptr);
	
	// Set menu back callback
	ctx->menu_back_callback = select_back_callback;
	
	// Setup menu controls
	game::menu::setup_controls(ctx);
}

void exit(game::context* ctx)
{
	// Destruct menu
	game::menu::clear_controls(ctx);
	game::menu::clear_callbacks(ctx);
	game::menu::remove_text_from_ui(ctx);
	game::menu::delete_text(ctx);
	
	ctx->ui_clear_pass->set_cleared_buffers(false, true, false);
}

} // namespace language_menu
} // namespace state
} // namespace game