<?php

namespace ManiaControl\Commands;

use FML\Controls\Frame;
use FML\Controls\Quads\Quad_BgsPlayerCard;
use FML\Controls\Quads\Quad_UIConstruction_Buttons;
use FML\ManiaLink;
use FML\Script\Features\Paging;
use ManiaControl\Callbacks\CallbackListener;
use ManiaControl\Callbacks\Callbacks;
use ManiaControl\ManiaControl;
use ManiaControl\Manialinks\LabelLine;
use ManiaControl\Manialinks\ManialinkManager;
use ManiaControl\Manialinks\ManialinkPageAnswerListener;
use ManiaControl\Players\Player;

/**
 * ManiaControl Help Manager Class
 *
 * @author    ManiaControl Team <mail@maniacontrol.com>
 * @copyright 2014-2020 ManiaControl Team
 * @license   http://www.gnu.org/licenses/ GNU General Public License, Version 3
 */
class HelpManager implements CommandListener, CallbackListener, ManialinkPageAnswerListener {

	const ACTION_OPEN_HELP_ALL = 'HelpManager.OpenHelpAll';
	const ACTION_OPEN_ADMIN_HELP_ALL = 'HelpManager.OpenAdminHelpAll';

	/*
	 * Private properties
	 */
	/** @var ManiaControl $maniaControl */
	private $maniaControl   = null;
	private $playerCommands = array();
	private $adminCommands  = array();

	/**
	 * Construct a new Commands Manager
	 *
	 * @param ManiaControl $maniaControl
	 */
	public function __construct(ManiaControl $maniaControl) {
		$this->maniaControl = $maniaControl;

		// Action Open StatsList
		$this->maniaControl->getManialinkManager()->registerManialinkPageAnswerListener(self::ACTION_OPEN_HELP_ALL, $this, 'maniaLink_helpAll');
		$this->maniaControl->getManialinkManager()->registerManialinkPageAnswerListener(self::ACTION_OPEN_ADMIN_HELP_ALL,$this,'maniaLink_adminHelpAll');

		$itemQuad = new Quad_UIConstruction_Buttons();
		$itemQuad->setSubStyle($itemQuad::SUBSTYLE_Help);
		$itemQuad->setAction(self::ACTION_OPEN_HELP_ALL);
		$this->maniaControl->getActionsMenu()->addMenuItem($itemQuad, true, 0, 'Available commands');
		$itemQuad = clone $itemQuad;
		$itemQuad->setAction(self::ACTION_OPEN_ADMIN_HELP_ALL);
		$this->maniaControl->getActionsMenu()->addAdminMenuItem($itemQuad, 0, 'Available admin commands');

		// Callbacks
		$this->maniaControl->getCallbackManager()->registerCallbackListener(Callbacks::ONINIT, $this, 'handleOnInit');
	}

	/**
	 * Handle ManiaControl OnInit Callback
	 */
	public function handleOnInit() {
		$this->maniaControl->getCommandManager()->registerCommandListener('help', $this, 'command_playerHelp', false, 'Shows all commands in chat.');
		$this->maniaControl->getCommandManager()->registerCommandListener('helpall', $this, 'command_playerHelpAll', false, 'Shows all commands in ManiaLink with description.');
		$this->maniaControl->getCommandManager()->registerCommandListener('help', $this, 'command_adminHelp', true, 'Shows all admin commands in chat.');
		$this->maniaControl->getCommandManager()->registerCommandListener('helpall', $this, 'command_adminHelpAll', true, 'Shows all admin commands in ManiaLink with description.');
	}

	/**
	 * Show a list of Admin Commands
	 *
	 * @param array  $chatCallback
	 * @param Player $player
	 */
	public function command_adminHelp(array $chatCallback, Player $player) {
		// Parse list from array
		$message = $this->parseHelpList($this->adminCommands);

		if ($message === null) {
			$this->maniaControl->getChat()->sendError('No Admin Commands supported!', $player);
		} else {
			$message = $this->maniaControl->getChat()->formatMessage(
				'Supported Admin Commands: %s',
				$message
			);
			$this->maniaControl->getChat()->sendChat($message, $player);
		}
	}

	/**
	 * Show a list of Player Commands
	 *
	 * @param array  $chatCallback
	 * @param Player $player
	 */
	public function command_playerHelp(array $chatCallback, Player $player) {
		// Parse list from array
		$message = $this->parseHelpList($this->playerCommands);

		if ($message === null) {
			$this->maniaControl->getChat()->sendError('No Player Commands supported!', $player);
		} else {
			$message = $this->maniaControl->getChat()->formatMessage(
				'Supported Player Commands: %s',
				$message
			);
			$this->maniaControl->getChat()->sendChat($message, $player);
		}
	}

	/**
	 * Show a ManiaLink list of Admin Commands
	 *
	 * @param array  $chatCallback
	 * @param Player $player
	 */
	public function command_adminHelpAll(array $chatCallback, Player $player) {
		$this->parseHelpList($this->adminCommands, true, $player);
	}

	/**
	 * Show a ManiaLink list of Player Commands
	 *
	 * @param array  $chatCallback
	 * @param Player $player
	 */
	public function command_playerHelpAll(array $chatCallback, Player $player) {
		$this->parseHelpList($this->playerCommands, true, $player);
	}

	/**
	 * Method for ManiaLink answer
	 *
	 * @param array                        $callback
	 * @param \ManiaControl\Players\Player $player
	 * @internal
	 */
	public function maniaLink_adminHelpAll(array $callback, Player $player){
		$this->parseHelpList($this->adminCommands,true, $player);
	}

	/**
	 * Method for ManiaLink answer
	 *
	 * @param array                        $callback
	 * @param \ManiaControl\Players\Player $player
	 * @internal
	 */
	public function maniaLink_helpAll(array $callback, Player $player) {
		$this->parseHelpList($this->playerCommands, true, $player);
	}

	/**
	 * Parse list with commands from array
	 *
	 * @param array  $commands
	 * @param bool   $isHelpAll
	 * @param Player $player
	 * @return string
	 */
	private function parseHelpList(array $commands, $isHelpAll = false, Player $player = null) {
		$showCommands      = array();
		$registeredMethods = array();
		$message           = '';
		foreach (array_reverse($commands) as $command) {
			if (array_key_exists($command['Method'], $registeredMethods)) {
				if ($showCommands[$registeredMethods[$command['Method']]]['Description'] === $command['Description']) {
					$name                        = $registeredMethods[$command['Method']];
					$showCommands[$name]['Name'] .= '|' . $command['Name'];
				} else {
					$showCommands[$command['Name']]        = $command;
					$registeredMethods[$command['Method']] = $command['Name'];
				}
			} else {
				$showCommands[$command['Name']]        = $command;
				$registeredMethods[$command['Method']] = $command['Name'];
			}
		}

		usort($showCommands, function ($commandA, $commandB) {
			return strcmp($commandA['Name'], $commandB['Name']);
		});

		if (!$isHelpAll) {
			foreach ($showCommands as $command) {
				$message .= $command['Name'] . ',';
			}
			$message = substr($message, 0, -1);
		} else {
			if ($player != null) {
				$this->showHelpAllList($showCommands, $player);
			}
		}
		return $message;
	}

	/**
	 * Show the HelpAll list to the player.
	 *
	 * @param array $commands
	 * @param mixed $player
	 */
	public function showHelpAllList(array $commands, $player) {
		$width  = $this->maniaControl->getManialinkManager()->getStyleManager()->getListWidgetsWidth();
		$height = $this->maniaControl->getManialinkManager()->getStyleManager()->getListWidgetsHeight();

		// create manialink
		$maniaLink = new ManiaLink(ManialinkManager::MAIN_MLID);
		$script    = $maniaLink->getScript();
		$paging    = new Paging();
		$script->addFeature($paging);

		// Main frame
		$frame = $this->maniaControl->getManialinkManager()->getStyleManager()->getDefaultListFrame($script, $paging);
		$maniaLink->addChild($frame);

		// Start offsets
		$posX = -$width / 2;
		$posY = $height / 2;

		//Predefine description Label
		$descriptionLabel = $this->maniaControl->getManialinkManager()->getStyleManager()->getDefaultDescriptionLabel();
		$frame->addChild($descriptionLabel);

		// Headline
		$headFrame = new Frame();
		$frame->addChild($headFrame);
		$headFrame->setY($posY - 5);

		$labelLine = new LabelLine($headFrame);
		$labelLine->addLabelEntryText('Command', $posX + 5);
		$labelLine->addLabelEntryText('Description', $posX + 50);
		$labelLine->render();

		$index     = 1;
		$posY      -= 10;
		$pageFrame = null;

		foreach ($commands as $command) {
			if ($index % 15 === 1) {
				$pageFrame = new Frame();
				$frame->addChild($pageFrame);
				$posY = $height / 2 - 10;
				$paging->addPageControl($pageFrame);
			}

			$playerFrame = new Frame();
			$pageFrame->addChild($playerFrame);
			$playerFrame->setY($posY);

			if ($index % 2 !== 0) {
				$lineQuad = new Quad_BgsPlayerCard();
				$playerFrame->addChild($lineQuad);
				$lineQuad->setSize($width, 4);
				$lineQuad->setSubStyle($lineQuad::SUBSTYLE_BgPlayerCardBig);
				$lineQuad->setZ(-0.1);
			}

			$labelLine = new LabelLine($playerFrame);
			$labelLine->addLabelEntryText($command['Name'], $posX + 5, 45);
			$labelLine->addLabelEntryText($command['Description'], $posX + 50, $width / 2 - $posX + 50);
			$labelLine->render();

			$posY -= 4;
			$index++;
		}

		// Render and display xml
		$this->maniaControl->getManialinkManager()->displayWidget($maniaLink, $player, 'HelpAllList');
	}

	/**
	 * Register a new Command
	 *
	 * @param string $name
	 * @param bool   $adminCommand
	 * @param string $description
	 * @param string $method
	 */
	public function registerCommand($name, $adminCommand = false, $description = '', $method) {
		if ($adminCommand) {
			array_push($this->adminCommands, array("Name" => $name, "Description" => $description, "Method" => $method));
		} else {
			array_push($this->playerCommands, array("Name" => $name, "Description" => $description, "Method" => $method));
		}
	}
}