<?php
class Quiz_QuizController extends Zend_Controller_Action 
{
	/**
	 * @var Zend_Session_Namespace
	 */
	protected $_store = null;
	
	public function init()
	{
		$this->_store = new Zend_Session_Namespace(__CLASS__);
	}
	
	public function startAction()
	{
		$this->_store->answers = array();
		$this->_store->questions = array();
	}

	public function winAction()
	{
	}
	
	public function endAction()
	{
		if($this->_request->isPost())
		{
			$yes = $this->_request->getPost('yes', false);
			
			if(!$yes)
			{
				$this->_helper->redirector->gotoRoute(array(), 'new-answer');
				return;
			}
			
			$this->_saveAnswers($this->_store->guess);
			$this->_forward('win');
			return;
		}
		
		$totalAnswers = count($this->_store->answers);
		if($totalAnswers == 0)
		{
			$this->_helper->redirector->gotoRoute(array(), 'new-answer');
			return;
		}
		
		$id = $this->_store->answers[ rand(0, $totalAnswers - 1) ];
		$answer = Doctrine_Query::create()
		        ->select('id, answer')
		        ->from('Answer')
		        ->where('id = ?', $id)
		        ->fetchOne();
			
		$this->view->answer = $answer->answer;
		$this->_store->guess = $answer->id;
	}
	
	protected function _saveAnswers($answerId)
	{
		foreach($this->_store->questions as $q)
		{
			$qa = new QuestionAnswer();
			$qa->question_id = $q['id'];
			$qa->choice = $q['choice'];
			$qa->answer_id = $answerId;
			$qa->save();
		}
	}
	
	
	public function newAnswerAction()
	{
		if($this->_request->isPost())
		{
			try 
			{
				$answer = new Answer();
				$answer->answer = $this->_request->getPost('answer');
				$answer->save();
			}
			catch(Doctrine_Connection_Exception $e)
			{
				$answer = Doctrine::getTable('Answer')->findOneByAnswer($this->_request->getPost('answer'));
			}
			
			try
			{
				$question = new Question();
				$question->question = $this->_request->getPost('question');
				$question->save();
			}
			catch(Doctrine_Connection_Exception $e)
			{
				$question = Doctrine::getTable('Question')->findOneByQuestion($this->_request->getPost('question'));
			}

			$qa = new QuestionAnswer();
			$qa->question_id = $question->id;
			$qa->answer_id = $answer->id;
			$qa->choice = (string)$this->_request->getPost('choice');
			$qa->save();

			$this->_saveAnswers($answer->id);
			
			$this->_helper->redirector->gotoRoute(array(), 'start');
			return;
		}
	}

	public function questionAction()
	{
		if($this->_request->isPost())
		{
			$yes = $this->_request->getPost('yes', false);
			
			if($yes !== false)
				$this->_filterAnswers(QuestionAnswer::CHOICE_YES);
			else
				$this->_filterAnswers(QuestionAnswer::CHOICE_NO);
		}
		
		$questionIds = array();
		foreach($this->_store->questions as $q)
			$questionIds[] = $q['id'];
			
		$question = Doctrine_Query::create()
		          ->from('Question')
		          ->whereNotIn('id', $questionIds)
		          ->orderBy('RANDOM()')
		          ->fetchOne();
	
		//We probably ran out of questions...
		$questionsAsked = count($this->_store->questions);
		$totalAnswers = count($this->_store->answers);
		if(!$question || $questionsAsked == 10)
		{
			$this->_helper->redirector->gotoRoute(array(), 'end');
			return;
		}
		
		$this->_store->questions[] = array(
			'id' => $question['id'],
			'choice' => null
		);
		$this->view->question = $question;
	}

    /**
     * Filter the answers
     * @param bool $yes
     */
	protected function _filterAnswers($yes)
	{
		$question = $this->_store->questions[ count($this->_store->questions) - 1];
		$question['choice'] = $yes;
		
		$q = Doctrine_Query::create()
		   ->select('answer_id')
		   ->distinct()
		   ->from('QuestionAnswer')
		   ->where('question_id = ?', $question['id'])
		   ->addWhere('choice = ?', (int)$yes);

		if(count($this->_store->answers) == 0)
		{
			$possibleAnswers = $q->execute();
			foreach($possibleAnswers as $a)
				$this->_store->answers[] = $a['answer_id'];
				
			return;
		}
		
		$q->whereIn('answer_id', $this->_store->answers);
		$possibleAnswers = $q->execute();
		
		if(count($possibleAnswers) == 0)
			return;
			
		$this->_store->answers = array();
		foreach($possibleAnswers as $a)
				$this->_store->answers[] = $a['answer_id'];
	}
	
}