<?php

class AccountsController extends AppController {

  var $uses = array('Account', 'LedgerEntry');

  var $sidemenu_links =
    array(array('name' => 'Accounts',        'header' => true),
	  array('name' => 'All',             'url' => array('controller' => 'accounts', 'action' => 'all')),
	  array('name' => 'Asset',           'url' => array('controller' => 'accounts', 'action' => 'asset')),
	  array('name' => 'Liability',       'url' => array('controller' => 'accounts', 'action' => 'liability')),
	  array('name' => 'Equity',          'url' => array('controller' => 'accounts', 'action' => 'equity')),
	  array('name' => 'Income',          'url' => array('controller' => 'accounts', 'action' => 'income')),
	  array('name' => 'Expense',         'url' => array('controller' => 'accounts', 'action' => 'expense')),
	  array('name' => 'Bank Deposit',    'url' => array('controller' => 'accounts', 'action' => 'deposit')),
	  );


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * override: sideMenuLinks
   *  - Generates controller specific links for the side menu
   */
  function sideMenuLinks() {
    return array_merge(parent::sideMenuLinks(), $this->sidemenu_links);
  }

  
  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: index / asset / liability / equity / income / expense / all
   *  - Generate a chart of accounts
   */

  function index()     { $this->all(); }
  function asset()     { $this->jqGridView('Asset Accounts'); }
  function liability() { $this->jqGridView('Liability Accounts'); }
  function equity()    { $this->jqGridView('Equity Accounts'); }
  function income()    { $this->jqGridView('Income Accounts'); }
  function expense()   { $this->jqGridView('Expense Accounts'); }
  function all()       { $this->jqGridView('All Accounts',       'all'); }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * virtuals: jqGridData
   *  - With the application controller handling the jqGridData action,
   *    these virtual functions ensure that the correct data is passed
   *    to jqGrid.
   */

  function jqGridDataSetup(&$params) {
    parent::jqGridDataSetup($params);
    if (!isset($params['action']))
      $params['action'] = 'all';
  }

  function jqGridDataCountTables(&$params, &$model) {
    return parent::jqGridDataTables($params, $model);
  }

  function jqGridDataTables(&$params, &$model) {
    return array
      ('link' =>
       array(// Models
	     'CurrentLedger' => array
	     (// Models
	      'LedgerEntry'
	      /* REVISIT <AP> 20090615:
	       *  I'll remove this 'conditions' section on a future checkin,
	       *  after I've proven out the %{MODEL_ALIAS} feature will be
	       *  sticking around.

	      => array
	      ('conditions' =>
	       array('OR' =>
		     array('LedgerEntry.debit_ledger_id  = CurrentLedger.id',
			   'LedgerEntry.credit_ledger_id = CurrentLedger.id'),
		     ),
	       ),

	       * END REVISIT
	       */
	      ),
	     ),
       );
  }

  function jqGridDataFields(&$params, &$model) {
    return array
      ('Account.*',
       'SUM(IF(LedgerEntry.debit_ledger_id  = CurrentLedger.id,
               LedgerEntry.amount, NULL)) AS debits',
       'SUM(IF(LedgerEntry.credit_ledger_id = CurrentLedger.id,
               LedgerEntry.amount, NULL)) AS credits',
       "SUM(IF(Account.type IN ('ASSET', 'EXPENSE'),
	       IF(LedgerEntry.debit_ledger_id = CurrentLedger.id, 1, -1),
	       IF(LedgerEntry.credit_ledger_id = CurrentLedger.id, 1, -1)
               ) * IF(LedgerEntry.amount, LedgerEntry.amount, 0)
           ) AS balance",
       'COUNT(LedgerEntry.id) AS entries');
  }

  function jqGridDataConditions(&$params, &$model) {
    $conditions = parent::jqGridDataConditions($params, $model);

    if (in_array($params['action'], array('asset', 'liability', 'equity', 'income', 'expense'))) {
      $conditions[] = array('Account.type' => strtoupper($params['action']));
    }

    return $conditions;
  }

  function jqGridRecordLinks(&$params, &$model, &$records, $links) {
    $links['Account'] = array('name');
    return parent::jqGridRecordLinks($params, $model, $records, $links);
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: newledger
   *  - Close the current account ledger and create a new one,
   *    carrying forward any balance if necessary.
   */

  function newledger($id = null) {
    if (!$this->Account->closeCurrentLedger($id)) {
      $this->Session->setFlash(__('Unable to create new Ledger.', true));
    }
    if ($id)
      $this->redirect(array('action'=>'view', $id));
    else
      $this->redirect(array('action'=>'index'));
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: deposit
   *  - Prepares the books for a bank deposit
   */
  function deposit() {
    if ($this->data) {
      pr($this->data);
      
      $deposit = array('total' => 0, 'ledgers' => array());
      $transaction = array();
      foreach ($this->data['Tillable']['Ledger'] AS $ledger_id => $ledger) {
	if (!$ledger['checked'])
	  continue;

/* 	pr(array('checkpoint' => 'save data', */
/* 		 compact('ledger'))); */

 	$ledger_entries =
 	  $this->Account->Ledger->find
	  ('all',
	   array('link' => array
		 ('Account' =>
		  array('fields' => array('name')),

		  'LedgerEntry' =>
		  array('fields' => array('amount'),

			'MonetarySource' =>
			array('fields' => array('name')),

			'Customer' =>
			array('fields' => array('name')),

			//'Transaction' =>
			//array('fields' => array('stamp')),
		   ),
		  ),
		 'fields' => false,
		 'conditions' => array(array('Ledger.id' => $ledger_id),
				       array('LedgerEntry.id IS NOT NULL'),
				       ),
		 ));

	//pr($ledger_entries);
	$deposit['total'] += $ledger['amount'];
	$deposit['ledgers'][] = array('name' => $ledger['account_name'],
				      'total' => $ledger['amount'],
				      'entries' => $ledger_entries);

	if ($ledger['amount'] != 0) {
	  $ids = $this->Account->postLedgerEntry
	    ($transaction,
	     null,
	     array('debit_account_id' => $this->data['Deposit']['Account']['id'],
		   'credit_ledger_id' => $ledger_id,
		   'amount' => $ledger['amount']));
	  $transaction = array_intersect_key($ids, array('transaction_id'=>1));
	  $this->Account->closeCurrentLedger($ledger['account_id']);
	}
      }

      $this->set(compact('deposit'));
      $this->render('deposit_slip');
      return;
    }

    $tillable_account = $this->Account->relatedAccounts('tillable');
    $depositable_account = $this->Account->relatedAccounts('depositable');

    foreach ($tillable_account AS &$acct) {
      $acct['Account']['stats'] = $this->Account->stats($acct['Account']['id']);
    }

    $this->set(compact('tillable_account', 'depositable_account'));
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * action: view
   *  - Displays information about a specific account
   */

  function view($id = null) {
    if (!$id) {
      $this->Session->setFlash(__('Invalid Item.', true));
      $this->redirect(array('action'=>'index'));
    }

    // Get details about the account and its ledgers (no ledger entries yet)
    $account = $this->Account->find
      ('first',
       array('contain' =>
	     array(// Models
		   'CurrentLedger' =>
		   array('fields' => array('id', 'sequence')),

		   'Ledger' =>
		   array('order' => array('Ledger.open_stamp' => 'DESC')),
		   ),
	     'conditions' => array(array('Account.id' => $id)),
	     )
       );

    // Get all ledger entries of the CURRENT ledger
    $entries = $this->Account->findLedgerEntries($id);
    $account['CurrentLedger']['LedgerEntry'] = $entries['Entries'];

    // Summarize each ledger
    foreach($account['Ledger'] AS &$ledger)
      $ledger = array_merge($ledger,
			    $this->Account->Ledger->stats($ledger['id']));

    // Obtain stats across ALL ledgers for the summary infobox
    $stats = $this->Account->stats($id, true);
    $stats = $stats['Ledger'];

    $this->sidemenu_links[] =
      array('name' => 'Operations',       'header' => true);
    $this->sidemenu_links[] =
      array('name' => 'New Ledger',       'url' => array('action' => 'newledger', $id));

    // Prepare to render
    $title = 'Account: ' . $account['Account']['name'];
    $this->set(compact('account', 'title', 'stats'));
  }
  
}