<?php
namespace Controllers;

class FinancesController
{
  private static function repo()
  {
    return new \Domain\Finances\FinanceRepository();
  }

  private static function requireAuth()
  {
    global $user;

    if ( !$user )
    {
      \controls\Users::login_form();
      return false;
    }
    return true;
  }

  private static function resolveDates()
  {
    $dates = \S::get_session( 'finance-dates' );
    $dates = explode( '_-_', $dates );

    $date_from = $dates[0] ? $dates[0] : date( 'Y-m-01' );
    $date_to = $dates[1] ? $dates[1] : date( 'Y-m-t' );

    return [ $date_from, $date_to ];
  }

  private static function resolveGroup( $repo )
  {
    if ( \S::get( 'group-id' ) )
      \S::set_session( 'finance-group', \S::get( 'group-id' ) );

    $group_id = \S::get_session( 'finance-group' );

    if ( !$group_id )
    {
      $group_id = $repo -> defaultGroup();
      \S::set_session( 'finance-group', $group_id );
    }

    return $group_id;
  }

  public static function mainView()
  {
    if ( !self::requireAuth() )
      return false;

    $repo = self::repo();

    if ( \S::get( 'tag-clear' ) )
      unset( $_SESSION['finance-tag-id'] );

    if ( \S::get( 'client_clear' ) )
      unset( $_SESSION['finance_client_id'] );

    if ( \S::get( 'dates' ) )
      \S::set_session( 'finance-dates', \S::get( 'dates' ) );

    if ( \S::get( 'tag-id' ) )
      \S::set_session( 'finance-tag-id', \S::get( 'tag-id' ) );

    if ( \S::get( 'client_id' ) )
      \S::set_session( 'finance_client_id', \S::get( 'client_id' ) );

    $group_id = self::resolveGroup( $repo );
    $tag_id = \S::get_session( 'finance-tag-id' );
    $client_id = \S::get_session( 'finance_client_id' );

    list( $date_from, $date_to ) = self::resolveDates();

    if ( $group_id == 3 )
    {
      $date_from = '2000-01-01';
      $date_to = '3000-01-01';
    }

    return \Tpl::view( 'finances/main-view', [
      'categories' => $repo -> categories( $date_from, $date_to, $tag_id, null, $group_id, $client_id ),
      'date_from' => $date_from,
      'date_to' => $date_to,
      'clients' => $repo -> clientsWithRevenue( $date_from, $date_to, $group_id ),
      'client_id' => $client_id,
      'groups' => $repo -> groupsList(),
      'group_id' => $group_id,
      'operations_list' => $repo -> operationsList( $date_from, $date_to, $group_id, $client_id ),
      'wallet_summary' => $repo -> walletSummary( $group_id ),
      'wallet_summary_this_month' => $repo -> walletSummaryThisMonth( $group_id ),
      'wallet_income_this_month' => $repo -> walletIncomeThisMonth( $group_id ),
      'wallet_expenses_this_month' => $repo -> walletExpensesThisMonth( $group_id )
    ] );
  }

  public static function operationEdit()
  {
    if ( !self::requireAuth() )
      return false;

    $repo = self::repo();

    return \Tpl::view( 'finances/operation-edit', [
      'operation' => $repo -> operationDetails( \S::get( 'operation-id' ) ),
      'category_id' => \S::get( 'category-id' ),
      'tags' => $repo -> tagsList( \S::get_session( 'finance-group' ) ),
      'tags_json' => $repo -> tagsJson( \S::get_session( 'finance-group' ) ),
      'operation_date' => \S::get_session( 'operation-date' ),
      'clients' => $repo -> clientsList()
    ] );
  }

  public static function operationSave()
  {
    if ( !self::requireAuth() )
      return false;

    $repo = self::repo();
    $response = [ 'status' => 'error', 'msg' => 'Podczas zapisywania operacji wystąpił błąd. Proszę spróbować ponownie.' ];
    $values = \S::json_to_array( \S::get( 'values' ) );

    \S::set_session( 'operation-date', $values['date'] );

    $client_id = isset( $values['client_id'] ) ? (int)$values['client_id'] : null;

    if ( $id = $repo -> saveOperation(
      $values['id'], $values['category_id'], $values['date'], $values['amount'],
      $values['description'], $values['tags'], \S::get_session( 'finance-group' ), $client_id
    ) )
      $response = [ 'status' => 'ok', 'msg' => 'Operacja została zapisana.', 'id' => $id ];

    echo json_encode( $response );
    exit;
  }

  public static function operationDelete()
  {
    if ( !self::requireAuth() )
      return false;

    $repo = self::repo();

    if ( $repo -> deleteOperation( \S::get( 'operation-id' ) ) )
    {
      \S::alert( 'Wybrana operacja została usunięta.' );
      header( 'Location: /finances/operations_list/category-id=' . \S::get( 'category-id' ) );
      exit;
    }
  }

  public static function categoryEdit()
  {
    if ( !self::requireAuth() )
      return false;

    $repo = self::repo();

    return \Tpl::view( 'finances/category-edit', [
      'category' => $repo -> categoryDetails( \S::get( 'id' ) ),
      'group_id' => \S::get_session( 'finance-group' )
    ] );
  }

  public static function categorySave()
  {
    if ( !self::requireAuth() )
      return false;

    $repo = self::repo();
    $response = [ 'status' => 'error', 'msg' => 'Podczas zapisywania kategorii wystąpił błąd. Proszę spróbować ponownie.' ];
    $values = \S::json_to_array( \S::get( 'values' ) );

    if ( $id = $repo -> saveCategory(
      $values['id'], $values['name'], $values['parent_id'], $values['group_id']
    ) )
      $response = [ 'status' => 'ok', 'msg' => 'Kategoria została zapisana.', 'id' => $id ];

    echo json_encode( $response );
    exit;
  }

  public static function categoryDelete()
  {
    if ( !self::requireAuth() )
      return false;

    $repo = self::repo();

    if ( $repo -> deleteCategory( \S::get( 'category_id' ) ) )
    {
      \S::alert( 'Wybrana kategoria została usunięta.' );
      header( 'Location: /finances/main_view/' );
      exit;
    }
  }

  public static function operationsList()
  {
    if ( !self::requireAuth() )
      return false;

    $repo = self::repo();
    $dates = \S::get( 'dates' );

    if ( $dates )
      \S::set_session( 'finance-dates', $dates );

    $dates = \S::get_session( 'finance-dates' );
    $dates = explode( ' - ', $dates );

    $date_from = $dates[0] ? $dates[0] : date( 'Y-m-01' );
    $date_to = $dates[1] ? $dates[1] : date( 'Y-m-t' );

    $category = $repo -> categoryDetails( \S::get( 'category-id' ) );

    if ( $category['group_id'] == 3 )
    {
      $date_from = '2000-01-01';
      $date_to = '3000-01-01';
    }

    return \Tpl::view( 'finances/operations-list', [
      'category' => $category,
      'operations' => $repo -> operations( \S::get( 'category-id' ), $date_from, $date_to, \S::get_session( 'finance-tag-id' ) ),
      'date_from' => $date_from,
      'date_to' => $date_to
    ] );
  }
}