<?php
class Statement extends AppModel {

  var $hasMany = array(
    'Lease',
    'Customer',
    'StatementEntry',

    'ChargeStatementEntry' => array(
      'className' => 'StatementEntry',
      'conditions' => array('type' => 'CHARGE'),
    ),
    'PaymentStatementEntry' => array(
      'className' => 'StatementEntry',
      'conditions' => array('type' => 'PAYMENT'),
    ),
  );


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: findStatementEntries
   *  - Returns an array of statement entries that belong to a given
   *    statement. There is extra work done... see the StatementEntry model.
   */
  function findStatementEntries($id, $cond = null, $link = null) {
/*     pr(array('function' => 'Statement::findStatementEntries', */
/* 	     'args' => compact('id', 'cond', 'link'), */
/* 	     )); */

    if (!isset($cond))
      $cond = array();

    $cond[] = array('Statement.id' => $id);
    $entries = $this->find('all', array('link' => $link, 'conditions' => $cond));

/*     pr(array('function' => 'Statement::findStatementEntries', */
/* 	     'args' => compact('id', 'cond', 'link'), */
/* 	     'return' => compact('entries'), */
/* 	     )); */
    return $entries;
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: findEntriesRelatedToAccount
   *  - Returns an array of statement entries that belong to the given
   *    account, and are related to a specific account.
   */
  function findEntriesRelatedToAccount($id, $rel_ids, $cond = null, $link = null) {
/*     pr(array('function' => 'Statement::findEntriesRelatedToAccount', */
/* 	     'args' => compact('id', 'rel_ids', 'cond', 'link'), */
/* 	     )); */

    if (!isset($cond))
      $cond = array();
    if (!isset($link))
      $link = array();
    if (!is_array($rel_ids))
      $rel_ids = array($rel_ids);

    $link['StatementEntry'] = array('LedgerEntry' => array('Ledger' => array('Account')));
    $cond[] = array('Account.id' => $rel_ids);

    $entries = $this->findStatementEntries($id, $cond, $link);

    $stats = $this->stats($id, $cond, $link);
    $entries = array('Entries' => $entries,
		     'summary' => $stats);

/*     pr(array('function' => 'Statement::findEntriesRelatedToAccount', */
/* 	     'args' => compact('id', 'relid', 'cond', 'link'), */
/* 	     'return' => compact('entries'), */
/* 	     )); */
    return $entries;
  }


  /**************************************************************************
   **************************************************************************
   **************************************************************************
   * function: stats
   *  - Returns summary data from the requested statement.
   */
  function stats($id, $cond = null, $link = null) {
    if (!isset($cond))
      $cond = array();
    if (!isset($link))
      $link = array();

    if (!isset($link['StatementEntry']))
      $link['StatementEntry'] = array('fields' => array());

    $cond[] = array('Statement.id' => $id);

    $stats = $this->find
      ('first', array
       ('link' => $link,

	'fields' =>
	array("SUM(IF(StatementEntry.type = 'CHARGE',
                      StatementEntry.amount, NULL)) AS charges",
	      "SUM(IF(StatementEntry.type = 'PAYMENT',
                      StatementEntry.amount, NULL)) AS payments",
	      "SUM(IF(StatementEntry.type = 'CHARGE', 1, -1)
                   * IF(StatementEntry.amount, StatementEntry.amount, 0)
                   ) AS balance",
	      "COUNT(StatementEntry.id) AS entries"),

	'conditions' => $cond,
	'group' => 'Statement.id',
	));

    // The fields are all tucked into the [0] index,
    // and the rest of the array is useless (empty).
    return $stats[0];
  }

}
?>