<?php
class Document extends AppModel {

    var $name = 'Document';

    //The Associations below have been created with all possible keys, those that are not needed can be removed
    var $belongsTo = array(

	    'User' => array(
			    'className' => 'User',
			    'foreignKey' => 'user_id',
			    'conditions' => '',
			    'fields' => '',
			    'order' => ''
	    )

    );

    var $hasMany = array(

	    'LineItem' => array(
			    'className' => 'LineItem',
			    'foreignKey' => 'document_id',
			    'order' => 'LineItem.item_number ASC'
	    ),

	    'DocPage' => array(
			    'className'=> 'DocPage',
			    'foreignKey' => 'document_id',
			    'order' => 'DocPage.page_number ASC'
	    )
    );


    var $hasOne = array(
	    'Invoice'   => array(
			    'className' => 'Invoice',
			    'foreignKey'=> 'document_id'
	    ),
	    'Quote' => array(
			    'className'=>'Quote',
			    'foriegnKey'=>'document_id'
	    ),

	    'PurchaseOrder' => array(
			    'className'=>'PurchaseOrder',
			    'foreignKey'=>'document_id'
	    ),

	    'OrderAcknowledgement' => array(
			    'className' => 'OrderAcknowledgement',
			    'foreignKey' => 'document_id'
	    )
    );


    //So much refactoring possible on this.
    function getCurrency($document) {

	if(!empty($document['Invoice']['id'])) {
	    $currencyID = $document['Invoice']['currency_id'];
	    $conditions = $this->__getCurrencyConditions($currencyID);

	    return $this->Invoice->Currency->find('first',$conditions);

	}
	elseif(!empty($document['Quote']['id'])) {
	    $currencyID = $document['Quote']['currency_id'];
	    $conditions = $this->__getCurrencyConditions($currencyID);
	    return $this->Quote->Currency->find('first',$conditions);

	}
	elseif(!empty($document['PurchaseOrder']['id'])) {
	    $currencyID = $document['PurchaseOrder']['currency_id'];
	    $conditions = $this->__getCurrencyConditions($currencyID);
	    return $this->PurchaseOrder->Currency->find('first',$conditions);
	}
	elseif(!empty($document['OrderAcknowledgement']['id'])) {
	    $currencyID = $document['OrderAcknowledgement']['currency_id'];
	    $conditions = $this->__getCurrencyConditions($currencyID);
	    return $this->OrderAcknowledgement->Currency->find('first',$conditions);
	}
    }


    function __getCurrencyConditions($currencyID) {
	return array('recursive'=>0, 'conditions'=>array('Currency.id'=>$currencyID));
    }

    function getDocType($document) {
	return $document['Document']['type'];
    }


    function getDocFullName($type) {

	switch($type) {
	    case 'quote':
		$fullName = 'Quotation';
		break;
	    case 'invoice':
		$fullName = 'Invoice';
		break;
	    case 'purchaseOrder':
		$fullName = 'Purchase Order';
		break;
	    case 'orderAck':
		$fullName = 'Order Acknowledgement';
		break;
	}
	return $fullName;
    }

    /**
     * Depending on the type of document. Return the CMC reference
     * ie. Enquiry Number (Quote)
     *     Invoice Number (Invoice)
     * @param <type> $document
     * @param <type> $type
     */
    function getCMCReferenceNumber($document, $type) {
	switch($type) {
	    case 'quote':
		break;
	    case 'invoice':
		break;
	    case 'purchaseOrder':
		break;
	    case 'orderAck':
		break;
	}
	return $fullName;
    }


    function getEnquiry($document) {
	if(!empty($document['Invoice']['id'])) {
	    return $this->Invoice->Enquiry->find('first',array('conditions'=>array('Enquiry.id'=>$document['Invoice']['enquiry_id'])));
	}
	elseif(!empty($document['Quote']['id'])) {
	    return $this->Quote->Enquiry->find('first',array('conditions'=>array('Enquiry.id'=>$document['Quote']['enquiry_id'])));
	}
	elseif(!empty($document['PurchaseOrder']['id'])) {
	    return $this->PurchaseOrder->Enquiry->find('first',array('conditions'=>array('Enquiry.id'=>$document['Invoice']['enquiry_id'])));
	}
	elseif(!empty($document['OrderAcknowledgement']['id'])) {
	        return $this->OrderAcknowledgement->Enquiry->find('first',array('conditions'=>array('Enquiry.id'=>$document['OrderAcknowledgement']['enquiry_id'])));

	}
    }
    /**
     * Does GST apply on this document. Based on the Enquiry GST TinyInt.
     * @param <type> $enquiry
     * @return Bool
     */
    function gstApplies($enquiry) {
	if ($enquiry['Enquiry']['gst'] == 0) {
	    return false;
	}
	else {
	    return true;
	}
    }

    function isLatestRevision($enquiry) {
	$number_of_revisions = $this->Document->Quote->findCount('Quote.enquiry_id ='. $enquiry);
	

    }


}
?>