<?php

class StatementEntriesController extends AppController {

  var $sidemenu_links = array();


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * override: sideMenuLinks
   *  - Generates controller specific links for the side menu
   */
  function sideMenuLinks() {
    return array_merge(parent::sideMenuLinks(), $this->sidemenu_links);
  }

  
  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: index / current / past / all
   *  - Creates a list of statement entries
   */

  function index()   { $this->gridView('All Statement Entries'); }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * virtuals: gridData
   *  - With the application controller handling the gridData action,
   *    these virtual functions ensure that the correct data is passed
   *    to jqGrid.
   */

  function gridDataCountTables(&$params, &$model) {
    $link =
      array(// Models
	    'Transaction' =>
	    array('fields' => array('id', 'stamp'),
		  ),

	    'Customer' =>
	    array('fields' => array('id', 'name'),
		  ),

	    'Lease' =>
	    array('fields' => array('id', 'number'),
		  'Unit' => 
		  array('fields' => array('id', 'name'),
			),
		  ),

	    'Account' => 
	    array('fields' => array('id', 'name', 'type'),
		  ),
	    );

    return array('link' => $link);
  }

  function gridDataTables(&$params, &$model) {
    $tables = $this->gridDataCountTables($params, $model);

    if (in_array('applied', $params['post']['fields'])) {
      $tables['link']['DisbursementEntry'] = array();
      $tables['link']['ChargeEntry']  = array();
    }

    return $tables;
  }

  function gridDataFields(&$params, &$model) {
    $fields = parent::gridDataFields($params, $model);

    if (in_array('applied', $params['post']['fields'])) {
      $fields[] = ("IF(StatementEntry.type = 'CHARGE'," .
		   "   SUM(COALESCE(DisbursementEntry.amount,0))," .
		   "   SUM(COALESCE(ChargeEntry.amount,0)))" .
		   " AS 'applied'");
      $fields[] = ("StatementEntry.amount - (" .
		   "IF(StatementEntry.type = 'CHARGE'," .
		   "   SUM(COALESCE(DisbursementEntry.amount,0))," .
		   "   SUM(COALESCE(ChargeEntry.amount,0)))" .
		   ") AS 'balance'");
    }

    $fields = array_merge($fields,
			  $this->StatementEntry->chargeDisbursementFields());

    return $fields;
  }

  function gridDataConditions(&$params, &$model) {
    $conditions = parent::gridDataConditions($params, $model);
    extract($params['post']['custom']);

    if (!empty($from_date))
      $conditions[]
	= array('Transaction.stamp >=' =>
		$this->StatementEntry->Transaction->dateFormatBeforeSave($from_date));

    if (!empty($through_date))
      $conditions[]
	= array('Transaction.stamp <=' =>
		$this->StatementEntry->Transaction->dateFormatBeforeSave($through_date . ' 23:59:59'));

    if (isset($account_id))
      $conditions[] = array('StatementEntry.account_id' => $account_id);

    if (isset($statement_entry_id)) {
      $conditions[] = array('OR' =>
			    array(array('ChargeEntry.id' => $statement_entry_id),
				  array('DisbursementEntry.id' => $statement_entry_id)));
    }

    return $conditions;
  }

  function gridDataPostProcessLinks(&$params, &$model, &$records, $links) {
    $links['StatementEntry'] = array('id');
    $links['Transaction']    = array('id');
    $links['Account']        = array('name');
    $links['Customer']       = array('name');
    $links['Lease']          = array('number');
    $links['Unit']           = array('name');
    return parent::gridDataPostProcessLinks($params, $model, $records, $links);
  }

  function gridDataOrder(&$params, &$model, $index, $direction) {
    $order = parent::gridDataOrder($params, $model, $index, $direction);

    // After sorting by whatever the user wants, add these
    // defaults into the sort mechanism.  If we're already
    // sorting by one of them, it will only be redundant,
    // and should cause no harm (possible a longer query?)
    $order[] = 'Transaction.stamp ' . $direction;
    $order[] = 'StatementEntry.effective_date ' . $direction;
    $order[] = 'StatementEntry.id ' . $direction;

    return $order;
  }

  function gridDataRecordsExecute(&$params, &$model, $query) {
    if (in_array('applied', $params['post']['fields'])) {
      $tquery = array_diff_key($query, array('fields'=>1,'group'=>1,'limit'=>1,'order'=>1));
      $tquery['fields'] = array("IF(StatementEntry.type = 'CHARGE'," .
				"   SUM(COALESCE(DisbursementEntry.amount,0))," .
				"   SUM(COALESCE(ChargeEntry.amount,0)))" .
				" AS 'applied'",

				"StatementEntry.amount - (" .
				"IF(StatementEntry.type = 'CHARGE'," .
				"   SUM(COALESCE(DisbursementEntry.amount,0))," .
				"   SUM(COALESCE(ChargeEntry.amount,0)))" .
				") AS 'balance'",
				);

      //pr(compact('tquery'));
      $total = $model->find('first', $tquery);
      $params['userdata']['total']   = $total[0]['applied'];
      $params['userdata']['balance'] = $total[0]['balance'];
    }
    else {
      $tquery = array_diff_key($query, array('fields'=>1,'group'=>1,'limit'=>1,'order'=>1));
      $tquery['fields'] = array("SUM(COALESCE(StatementEntry.amount,0)) AS 'total'");
      $total = $model->find('first', $tquery);
      $params['userdata']['total']   = $total[0]['total'];
    }

    return parent::gridDataRecordsExecute($params, $model, $query);
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: reverse the ledger entry
   */

  function reverse($id) {
    $this->StatementEntry->reverse($id);
    $this->redirect(array('action'=>'view', $id));
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: waive the ledger entry
   */

  function waive($id) {
    $this->StatementEntry->waive($id);
    $this->redirect(array('action'=>'view', $id));
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: view
   *  - Displays information about a specific entry
   */

  function view($id = null) {
    if (!$id) {
      $this->Session->setFlash(__('Invalid Item.', true));
      $this->redirect(array('controller' => 'accounts', 'action'=>'index'));
    }

    // Get the StatementEntry and related fields
    $entry = $this->StatementEntry->find
      ('first',
       array('contain' => array
	     ('Transaction' => array('fields' => array('id', 'type', 'stamp')),
	      'Account' => array('id', 'name', 'type'),
	      'Customer' => array('fields' => array('id', 'name')),
	      'Lease' => array('fields' => array('id')),
	      ),

	     'conditions' => array('StatementEntry.id' => $id),
	     ));
    
    $reconciled = $this->StatementEntry->reconciledEntries($id);

    $stats = $this->StatementEntry->stats($id);

    if (in_array(strtoupper($entry['StatementEntry']['type']), $this->StatementEntry->debitTypes()))
      $stats = $stats['Charge'];
    else
      $stats = $stats['Disbursement'];


    if (strtoupper($entry['StatementEntry']['type']) === 'CHARGE') {

      $reversal = $this->StatementEntry->find
	('first',
	 array('link' => array('DisbursementEntry'),
	       'conditions' => array(array('StatementEntry.id' => $id),
				     array('DisbursementEntry.type' => 'REVERSAL')),
	       ));

      // Set up dynamic menu items
      if (empty($reversal) || $stats['balance'] > 0)
	$this->sidemenu_links[] =
	  array('name' => 'Operations', 'header' => true);

      if (empty($reversal))
	$this->sidemenu_links[] =
	  array('name' => 'Reverse',
		'url' => array('action' => 'reverse',
			       $id));

      if ($stats['balance'] > 0)
	$this->sidemenu_links[] =
	  array('name' => 'Waive Balance',
		'url' => array('action' => 'waive',
			       $id));
    }

    // Prepare to render.
    $title = "Statement Entry #{$entry['StatementEntry']['id']}";
    $this->set(compact('entry', 'title', 'reconciled', 'stats'));
  }

}