<?php
class Application_Service_ShowFormService
{
    private $ccShow;
    private $instanceId;

    public function __construct($showId = null, $instanceId = null)
    {
        if (!is_null($showId)) {
            $this->ccShow = CcShowQuery::create()->findPk($showId);
        }
        
        $this->instanceId = $instanceId;
    }

    /**
     * 
     * @return array of show forms
     */
    public function createShowForms()
    {
        $formWhat    = new Application_Form_AddShowWhat();
        $formAutoPlaylist = new Application_Form_AddShowAutoPlaylist();
        $formWho     = new Application_Form_AddShowWho();
        $formWhen    = new Application_Form_AddShowWhen();
        $formRepeats = new Application_Form_AddShowRepeats();
        $formStyle   = new Application_Form_AddShowStyle();
        $formLive    = new Application_Form_AddShowLiveStream();
        $formRecord = new Application_Form_AddShowRR();
        $formAbsoluteRebroadcast = new Application_Form_AddShowAbsoluteRebroadcastDates();
        $formRebroadcast = new Application_Form_AddShowRebroadcastDates();

        $formWhat->removeDecorator('DtDdWrapper');
        $formAutoPlaylist->removeDecorator('DtDdWrapper');
        $formWho->removeDecorator('DtDdWrapper');
        $formWhen->removeDecorator('DtDdWrapper');
        $formRepeats->removeDecorator('DtDdWrapper');
        $formStyle->removeDecorator('DtDdWrapper');
        $formLive->removeDecorator('DtDdWrapper');
        $formRecord->removeDecorator('DtDdWrapper');
        $formAbsoluteRebroadcast->removeDecorator('DtDdWrapper');
        $formRebroadcast->removeDecorator('DtDdWrapper');

        $forms = array();
        $forms["what"] = $formWhat;
        $forms["autoplaylist"] = $formAutoPlaylist;
        $forms["who"] = $formWho;
        $forms["when"] = $formWhen;
        $forms["repeats"] = $formRepeats;
        $forms["style"] = $formStyle;
        $forms["live"] = $formLive;
        $forms["record"] = $formRecord;
        $forms["abs_rebroadcast"] = $formAbsoluteRebroadcast;
        $forms["rebroadcast"] = $formRebroadcast;

        return $forms;
    }

    /**
     * 
     * Popluates the what, autoplaylist, when, and repeat forms
     * with default values
     */
    public function populateNewShowForms($formWhat, $formWhen, $formRepeats)
    {
        $formWhat->populate(
            array('add_show_id' => '-1',
                  'add_show_instance_id' => '-1'));

        $formWhen->populate(
            array('add_show_start_date' => date("Y-m-d"),
                  'add_show_start_time' => '00:00',
                  'add_show_end_date_no_repeate' => date("Y-m-d"),
                  'add_show_end_time' => '01:00',
                  'add_show_duration' => '01h 00m'));

        $formRepeats->populate(array('add_show_end_date' => date("Y-m-d")));
    }

    public function delegateShowInstanceFormPopulation($forms)
    {
        $this->populateFormWhat($forms["what"]);
        $this->populateInstanceFormWhen($forms["when"]);
        $this->populateFormWho($forms["who"]);
        $this->populateFormLive($forms["live"]);
        $this->populateFormStyle($forms["style"]);

        /* Only the field on the 'when' form will get updated so we should
         * make all other forms disabled or readonly
         * 
         * 'what' needs to be readonly because zendform will not validate
         * if they are disabled
         * 
         * All other forms can be disabled because we do not update those values
         * when the user edits a repeating instance
         */
        $forms["what"]->makeReadonly();
        $forms["what"]->enableInstanceDesc();
        $forms["autoplaylist"]->disable();
        $forms["repeats"]->disable();
        $forms["who"]->disable();
        $forms["style"]->disable();
        // Hide the show logo fields when users are editing a single instance
        $forms["style"]->hideShowLogo();
        $forms["live"]->disable();
        $forms["record"]->disable();
        $forms["rebroadcast"]->disable();
        $forms["abs_rebroadcast"]->disable();
    }

    /**
     * 
     * Delegates populating each show form with the appropriate
     * data of the current show being edited
     * 
     * @param $forms
     */
    public function delegateShowFormPopulation($forms)
    {
        $this->populateFormWhat($forms["what"]);
        //local show start DT
        $this->populateFormAutoPlaylist($forms["autoplaylist"]);
        $showStart = $this->populateFormWhen($forms["when"]);
        $this->populateFormRepeats($forms["repeats"], $showStart);
        $this->populateFormWho($forms["who"]);
        $this->populateFormStyle($forms["style"]);
        $this->populateFormLive($forms["live"]);
        $this->populateFormRecord($forms["record"]);
        $this->populateFormRebroadcastRelative($forms["rebroadcast"]);
        $this->populateFormRebroadcastAbsolute($forms["abs_rebroadcast"]);
    }

    private function populateFormWhat($form)
    {
        $ccShowInstance = CcShowInstancesQuery::create()->findPk($this->instanceId);
        
        $form->populate(
            array(
                'add_show_instance_id' => $this->instanceId,
                'add_show_id' => $this->ccShow->getDbId(),
                'add_show_name' => $this->ccShow->getDbName(),
                'add_show_url' => $this->ccShow->getDbUrl(),
                'add_show_genre' => $this->ccShow->getDbGenre(),
                'add_show_description' => $this->ccShow->getDbDescription(),
                'add_show_instance_description' => $ccShowInstance->getDbDescription(),
            ));
    }

    private function populateFormAutoPlaylist($form)
    {
        $ccShowInstance = CcShowInstancesQuery::create()->findPk($this->instanceId);
        
        $form->populate(
            array(
               'add_show_has_autoplaylist' => $this->ccShow->getDbHasAutoPlaylist() ? 1 : 0,
               'add_show_autoplaylist_id' => $this->ccShow->getDbAutoPlaylistId()
                
            ));
    }


   private function populateFormWhen($form)
    {
        if ($this->ccShow->isRepeating()) {
            $ccShowDay = $this->ccShow->getFirstRepeatingCcShowDay();
        } else {
            $ccShowDay = $this->ccShow->getFirstCcShowDay();
        }

        $showStart = $ccShowDay->getLocalStartDateAndTime();
        $showEnd = $ccShowDay->getLocalEndDateAndTime();

        //check if the first show is in the past
        if ($ccShowDay->isShowStartInPast()) {
            //for a non-repeating show, we should never allow user to change the start time.
            //for a repeating show, we should allow because the form works as repeating template form
            if (!$ccShowDay->isRepeating()) {
                $form->disableStartDateAndTime();
            } else {
                $showStartAndEnd = $this->getNextFutureRepeatShowTime();
                if (!is_null($showStartAndEnd)) {
                    $showStart = $showStartAndEnd["starts"];
                    $showEnd = $showStartAndEnd["ends"];
                }
                if ($this->hasShowStarted($showStart)) {
                    $form->disableStartDateAndTime();
                }
            }
        }

        //Disable starting a show 'now' when editing an existing show.
        $form->getElement('add_show_start_now')->setAttrib('disable', array('now'));

        $form->populate(
            array(
                'add_show_start_date' => $showStart->format("Y-m-d"),
                'add_show_start_time' => $showStart->format("H:i"),
                'add_show_end_date_no_repeat' => $showEnd->format("Y-m-d"),
                'add_show_end_time'    => $showEnd->format("H:i"),
                'add_show_duration' => $ccShowDay->formatDuration(true),
                'add_show_timezone' => $ccShowDay->getDbTimezone(),
                'add_show_repeats' => $ccShowDay->isRepeating() ? 1 : 0));

        return $showStart;
    }

    public function getNextFutureRepeatShowTime()
    {
        $ccShowInstance = CcShowInstancesQuery::create()
            ->filterByDbShowId($this->ccShow->getDbId())
            ->filterByDbModifiedInstance(false)
            ->filterByDbStarts(gmdate("Y-m-d H:i:s"), Criteria::GREATER_THAN)
            ->orderByDbStarts()
            ->findOne();

        if (!$ccShowInstance) {
            return null;
        }

        $starts = new DateTime($ccShowInstance->getDbStarts(), new DateTimeZone("UTC"));
        $ends = new DateTime($ccShowInstance->getDbEnds(), new DateTimeZone("UTC"));
        $showTimezone = $this->ccShow->getFirstCcShowDay()->getDbTimezone();

        $starts->setTimezone(new DateTimeZone($showTimezone));
        $ends->setTimezone(new DateTimeZone($showTimezone));

        return array("starts" => $starts, "ends" => $ends);
    }

    private function populateInstanceFormWhen($form)
    {
        $ccShowInstance = CcShowInstancesQuery::create()->findPk($this->instanceId);

        //get timezone the show is created in
        $timezone = $ccShowInstance->getCcShow()->getFirstCcShowDay()->getDbTimezone();
        //$timezone = new DateTimeZone(Application_Model_Preference::GetDefaultTimezone());

        //DateTime object in UTC
        $showStart = $ccShowInstance->getDbStarts(null);
        $showStart->setTimezone(new DateTimeZone($timezone));

        $showEnd = $ccShowInstance->getDbEnds(null);
        $showEnd->setTimezone(new DateTimeZone($timezone));

        //if the show has started, do not allow editing on the start time
        if ($showStart->getTimestamp() <= time()) {
            $form->disableStartDateAndTime();
        }

        //Disable starting a show 'now' when editing an existing show.
        $form->getElement('add_show_start_now')->setAttrib('disable', array('now'));

        $form->populate(
            array(
                'add_show_start_now' => 'future',
                'add_show_start_date' => $showStart->format("Y-m-d"),
                'add_show_start_time' => $showStart->format("H:i"),
                'add_show_end_date_no_repeat' => $showEnd->format("Y-m-d"),
                'add_show_end_time' => $showEnd->format("H:i"),
                'add_show_duration' => $this->calculateDuration(
                    $showStart->format(DEFAULT_TIMESTAMP_FORMAT), $showEnd->format(DEFAULT_TIMESTAMP_FORMAT), $timezone),
                'add_show_timezone' => $timezone,
                'add_show_repeats' => 0));

        $form->getElement('add_show_repeats')->setOptions(array("disabled" => true));
    }

    /**
     * 
     * Enter description here ...
     * @param $form
     * @param DateTime $nextFutureShowStart user's local timezone
     */
    private function populateFormRepeats($form, $nextFutureShowStart)
    {
        if ($this->ccShow->isRepeating()) {
            $ccShowDays = $this->ccShow->getRepeatingCcShowDays();
        } else {
            $ccShowDays = $this->ccShow->getCcShowDayss();
        }

        $days = array();
        foreach ($ccShowDays as $ccShowDay) {
            $showStart = $ccShowDay->getLocalStartDateAndTime();
            array_push($days, $showStart->format("w"));
        }

        $service_show = new Application_Service_ShowService($this->ccShow->getDbId());
        $repeatEndDate = $service_show->getRepeatingEndDate();
        //end dates are stored non-inclusively so we need to
        //subtract one day
        if (!is_null($repeatEndDate)) {
            $repeatEndDate->sub(new DateInterval("P1D"));
        }
        
        //default monthly repeat type
        $monthlyRepeatType = 2;
        $repeatType = $ccShowDays[0]->getDbRepeatType();
        if ($repeatType == REPEAT_MONTHLY_WEEKLY) {
            $monthlyRepeatType = $repeatType;
            //a repeat type of 2 means the show is repeating monthly
            $repeatType = 2;
        } elseif ($repeatType == REPEAT_MONTHLY_MONTHLY) {
            $monthlyRepeatType = $repeatType;
        }

        $form->populate(
            array(
                'add_show_linked' => $this->ccShow->getDbLinked(),
                'add_show_repeat_type' => $repeatType,
                'add_show_day_check' => $days,
                'add_show_end_date' => (!is_null($repeatEndDate)) ? $repeatEndDate->format("Y-m-d"):null,
                'add_show_no_end' => (is_null($repeatEndDate)),
                'add_show_monthly_repeat_type' => $monthlyRepeatType));

        if (!$this->ccShow->isLinkable() || $this->ccShow->isRecorded()) {
            $form->getElement('add_show_linked')->setOptions(array('disabled' => true));
        }

        /* Because live editing of a linked show is disabled, we will make
         * the linking option readonly if the current show is being edited. We
         * dont' want the user to suddenly not be able to edit the current show
         * 
         * Readonly does not work with checkboxes but we can't disable it
         * because the value won't get posted. In add-show.js we stop the
         * onclick event from firing by returning false
         */
        if ($this->hasShowStarted($nextFutureShowStart)) {
            $form->getElement('add_show_linked')->setAttrib('readonly', 'readonly');
        }
    }

    private function populateFormWho($form)
    {
        $ccShowHosts = $this->ccShow->getCcShowHostss();

        $hosts = array();
        foreach ($ccShowHosts as $ccShowHost) {
            array_push($hosts, $ccShowHost->getDbHost());
        }

        $form->populate(array('add_show_hosts' => $hosts));
    }

    private function populateFormStyle($form)
    {
        $src = $this->ccShow->getDbImagePath() ? 
            $this->imagePathToDataUri($this->ccShow->getDbImagePath()) : '';
        
        $form->populate(
            array(
                'add_show_background_color' => $this->ccShow->getDbBackgroundColor(),
                'add_show_color' => $this->ccShow->getDbColor(),
                'add_show_logo_current' => $src));
    }
    
    /**
     * Convert a static image from disk to a base64 data URI
     * 
     * @param unknown $path
     *         - the path to the image on the disk
     * @return string
     *         - the data URI representation of the image
     */
    private function imagePathToDataUri($path) {
        $imageData = null;
        $bytesRead = 0;
        try {
            ob_start();
            header("Content-type: image/*");
            $bytesRead = @readfile($path);
            $imageData = base64_encode(ob_get_contents());
            ob_end_clean();
            if ($bytesRead === FALSE) {
                $imageData = null;
            }
        } catch (Exception $e) {
            Logging::error("Failed to read image: " . $path);
            $imageData = null;
        }
        // return the data URI - data:{mime};base64,{data}
        return ($imageData === null || $imageData === '') ? 
            '' : 'data: '.mime_content_type($path).';base64,'.$imageData;
    }

    private function populateFormLive($form)
    {
        $form->populate(
            array(
                "cb_airtime_auth" => $this->ccShow->getDbLiveStreamUsingAirtimeAuth(),
                "cb_custom_auth" => $this->ccShow->getDbLiveStreamUsingCustomAuth(),
                "custom_username" => $this->ccShow->getDbLiveStreamUser(),
                "custom_password" => $this->ccShow->getDbLiveStreamPass()));
    }

    private function populateFormRecord($form)
    {
        $form->populate(
            array(
                'add_show_record' => $this->ccShow->isRecorded(),
                'add_show_rebroadcast' => $this->ccShow->isRebroadcast()));

        $form->getElement('add_show_record')->setOptions(array('disabled' => true));
    }

    private function populateFormRebroadcastRelative($form)
    {
        $relativeRebroadcasts = $this->ccShow->getRebroadcastsRelative();

        $formValues = array();
        $i = 1;
        foreach ($relativeRebroadcasts as $rr) {
            $formValues["add_show_rebroadcast_date_$i"] = $rr->getDbDayOffset();
            $formValues["add_show_rebroadcast_time_$i"] = Application_Common_DateHelper::removeSecondsFromTime(
                $rr->getDbStartTime());
            $i++;
        }

        $form->populate($formValues);
    }

    private function populateFormRebroadcastAbsolute($form)
    {
        $absolutRebroadcasts = $this->ccShow->getRebroadcastsAbsolute();
        $timezone = $this->ccShow->getFirstCcShowDay()->getDbTimezone();

        $formValues = array();
        $i = 1;
        foreach ($absolutRebroadcasts as $ar) {
            //convert dates to user's local time
            $start = new DateTime($ar->getDbStarts(), new DateTimeZone("UTC"));
            $start->setTimezone(new DateTimeZone($timezone));
            $formValues["add_show_rebroadcast_date_absolute_$i"] = $start->format("Y-m-d");
            $formValues["add_show_rebroadcast_time_absolute_$i"] = $start->format("H:i");
            $i++;
        }

        $form->populate($formValues);
    }

    /**
     * 
     * Enter description here ...
     * @param DateTime $showStart user's local time
     */
    private function hasShowStarted($p_showStart) {
        $showStart = clone $p_showStart;
        $showStart->setTimeZone(new DateTimeZone("UTC"));

        if ($showStart->format("Y-m-d H:i:s") < gmdate("Y-m-d H:i:s")) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Before we send the form data in for validation, there
     * are a few fields we may need to adjust first
     * 
     * @param $formData
     */
    public function preEditShowValidationCheck($formData)
    {
        // If the start date or time were disabled, don't validate them
        $validateStartDate = $formData['start_date_disabled'] === "false";
        $validateStartTime = $formData['start_time_disabled'] === "false";

        //CcShowDays object of the show currently being edited
        $currentShowDay = $this->ccShow->getFirstCcShowDay();

        //DateTime object
        $dt = $currentShowDay->getLocalStartDateAndTime();
        $formData['add_show_record'] = $currentShowDay->getDbRecord();

        //if the show is repeating, set the start date to the next
        //repeating instance in the future
        $originalShowStartDateTime = $this->getCurrentOrNextInstanceStartTime();
        if (!$originalShowStartDateTime) {
            $originalShowStartDateTime = $dt;
        }

        return array($formData, $validateStartDate, $validateStartTime, $originalShowStartDateTime);
    }

    /**
     * 
     * Returns a DateTime object, in the user's local time,
     * of the current or next show instance start time
     *
     * Returns null if there is no next future repeating show instance
     */
    public function getCurrentOrNextInstanceStartTime()
    {
        $ccShowInstance = CcShowInstancesQuery::create()
            ->filterByDbShowId($this->ccShow->getDbId())
            ->filterByDbModifiedInstance(false)
            ->filterByDbStarts(gmdate("Y-m-d H:i:s"), Criteria::GREATER_EQUAL)
            ->orderByDbStarts()
            ->findOne();

        if (!$ccShowInstance) {
            return null;
        }
        
        $starts = new DateTime($ccShowInstance->getDbStarts(), new DateTimeZone("UTC"));
        $showTimezone = $this->ccShow->getFirstCcShowDay()->getDbTimezone();

        $starts->setTimezone(new DateTimeZone($showTimezone));

        return $starts;
    }


    /**
     * 
     * Validates show forms
     * 
     * @return boolean
     */
    public function validateShowForms($forms, $formData, $validateStartDate = true,
        $originalStartDate=null, $editShow=false, $instanceId=null)
    {
        $what = $forms["what"]->isValid($formData);
        $autoplaylist = $forms["autoplaylist"]->isValid($formData);
        $live = $forms["live"]->isValid($formData);
        $record = $forms["record"]->isValid($formData);
        $who = $forms["who"]->isValid($formData);
        
        /*
         * hack to prevent validating the file upload field since it
         * isn't passed into $data
         */
        $upload = $forms["style"]->getElement("add_show_logo");
        $forms["style"]->removeElement("add_show_logo");
        
        $style = $forms["style"]->isValid($formData);
        
        // re-add the upload element
        $forms["style"]->addElement($upload);
        
        $when = $forms["when"]->isWhenFormValid($formData, $validateStartDate,
            $originalStartDate, $editShow, $instanceId);

        $repeats = true;
        if ($formData["add_show_repeats"]) {
            $repeats = $forms["repeats"]->isValid($formData);

            /*
             * Make the absolute rebroadcast form valid since
             * it does not get used if the show is repeating
             */
            $forms["abs_rebroadcast"]->reset();
            $absRebroadcast = true;

            $rebroadcast = true;
            if (isset($formData["add_show_rebroadcast"]) && $formData["add_show_rebroadcast"]) {
                $formData["add_show_duration"] = Application_Service_ShowService::formatShowDuration(
                    $formData["add_show_duration"]);
                $rebroadcast = $forms["rebroadcast"]->isValid($formData);
            }
        } else {
            /*
             * Make the rebroadcast form valid since it does
             * not get used if the show is not repeating.
             * Instead, we use the absolute rebroadcast form
             */
            $forms["rebroadcast"]->reset();
            $rebroadcast = true;

            $absRebroadcast = true;
            if (isset($formData["add_show_rebroadcast"]) && $formData["add_show_rebroadcast"]) {
                $formData["add_show_duration"] = Application_Service_ShowService::formatShowDuration(
                    $formData["add_show_duration"]);
                $absRebroadcast = $forms["abs_rebroadcast"]->isValid($formData);
            }
        }

        return ($what && $autoplaylist && $live && $record && $who && $style && $when &&
            $repeats && $absRebroadcast && $rebroadcast);
    }
    
    public function calculateDuration($start, $end, $timezone)
    {
        try {
            
            $tz = new DateTimeZone($timezone);
            $startDateTime = new DateTime($start, $tz);
            $endDateTime = new DateTime($end, $tz);

            $duration = $startDateTime->diff($endDateTime);

            $day = intval($duration->format('%d'));
            if ($day > 0) {
                $hour = intval($duration->format('%h'));
                $min = intval($duration->format('%i'));
                $hour += $day * 24;
                $hour = min($hour, 99);
                $sign = $duration->format('%r');
                return sprintf('%s%02dh %02dm', $sign, $hour, $min);
            } else {
                return $duration->format('%r%Hh %Im');
            }
        } catch (Exception $e) {
            Logging::info($e->getMessage());
            return "Invalid Date";
        }
    }

    /**
     * When the timezone is changed in add-show form this function
     * applies the new timezone to the start and end time
     *
     * @param $date String
     * @param $time String
     * @param $timezone String
     */
    public static function localizeDateTime($date, $time, $newTimezone, $oldTimezone)
    {
        $dt = new DateTime($date." ".$time, new DateTimeZone($oldTimezone));

        $dt->setTimeZone(new DateTimeZone($newTimezone));

        return array(
            "date" => $dt->format("Y-m-d"),
            "time" => $dt->format("H:i")
        );
    }
}