<?php
/**
 * @author  Jan-Hendrik Willms <tleilax+studip@gmail.com>
 * @license GPL2 or any later version
 */
class ConsultationModule extends CorePlugin implements
    StudipModuleExtended,
    SystemPlugin,
    PrivacyPlugin,
    HomepagePlugin
{
    public function __construct()
    {
        parent::__construct();

        // Update consultation events for the course when a member changes
        foreach (['UserDidEnterCourse', 'UserDidLeaveCourse'] as $event) {
            NotificationCenter::on($event, function ($event, $course_id) {
                $course = Course::find($course_id);
                if ($course) {
                    ConsultationSlot::findEachBySQL(
                        function (ConsultationSlot $slot) {
                            $slot->updateEvents();
                        },
                        "JOIN consultation_blocks USING (block_id)
                         WHERE range_id = ? AND range_type = 'course'",
                        [$course_id]
                    );
                }
            });
        }

        // Update consultation events for the course when a member changes
        foreach (['InstituteMemberDidCreate', 'InstituteMemberDidDelete'] as $event) {
            NotificationCenter::on($event, function ($event, InstituteMember $member) {
                ConsultationSlot::findEachBySQL(
                    function (ConsultationSlot $slot) {
                        $slot->updateEvents();
                    },
                    "JOIN consultation_blocks USING (block_id)
                      WHERE range_id = ? AND range_type = 'institute'",
                    [$member->institut_id]
                );
            });
        }

        NotificationCenter::on('UserDidLeaveCourse', function ($event, $course_id) {
            // Delete consultation events for the user and course
            $course = Course::find($course_id);
            if ($course) {
                ConsultationSlot::findEachBySQL(
                    function (ConsultationSlot $slot) {
                        $slot->updateEvents();
                    },
                    "JOIN consultation_blocks USING (block_id)
                     WHERE range_id = ? AND range_type = 'course'",
                    [$course_id]
                );
            }
        });

        NotificationCenter::on('UserDidDelete', function ($event, $user) {
            // Delete consultation bookings and slots
            ConsultationBooking::deleteByUser_id($user->id);
            ConsultationBlock::deleteBySQL("range_id = ? AND range_type = 'user'", [$user->id]);
        });
        NotificationCenter::on('CourseDidDelete', function ($event, $course) {
            // Delete consultation blocks
            ConsultationBlock::deleteBySQL("range_id = ? AND range_type = 'course'", [$course->id]);
        });
        NotificationCenter::on('InstituteDidDelete', function ($event, $institute) {
            // Delete consultation blocks
            ConsultationBlock::deleteBySQL("range_id = ? AND range_type = 'institute'", [$institute->id]);
        });
    }

    /**
     * {@inheritdoc}
     */
    public function isActivatableForContext(Range $context)
    {
        // Consultations globally disabled?
        if (!Config::get()->CONSULTATION_ENABLED) {
            return false;
        }

        // Context is user and current user has required permission?
        if ($context instanceof User) {
            return $GLOBALS['perm']->have_perm(Config::get()->CONSULTATION_REQUIRED_PERMISSION, $context->getRangeId());
        }

        return true;
    }

    /**
     * {@inheritdoc}
     */
    public function getIconNavigation($course_id, $last_visit, $user_id)
    {
        // TODO

        return null;
    }

    /**
     * {@inheritdoc}
     */
    public function getManyIconNavigation(array $course_ids, ?string $user_id = null): array
    {
        // TODO

        return [];
    }

    /**
     * {@inheritdoc}
     */
    public function getTabNavigation($course_id)
    {
        if ($GLOBALS['user']->id !== 'nobody') {
            $navigation = new ConsultationNavigation(RangeFactory::find($course_id));
            $navigation->setImage(Icon::create('consultation', Icon::ROLE_INFO_ALT));
            return ['consultation' => $navigation];
        }

        return [];
    }

    /**
     * {@inheritdoc}
     */
    public function getInfoTemplate($course_id)
    {
        return null;
    }

    /**
     * {@inheritdoc}
     */
    public function getHomepageTemplate($user_id)
    {
        return null;
    }


    /**
     * {@inheritdoc}
     */
    public function getMetadata()
    {
        return [
            'summary'     => _('Generische Terminvergabe'),
            'description' => _('Über die generische Terminvergabe können jegliche Formen von Terminen ' .
                               'angeboten werden, zu denen sich Personen oder auch Gruppen von Personen ' .
                               'anmelden können.'),
            'category'    => _('Kommunikation und Zusammenarbeit'),
            'keywords'    => _('Terminvergabe, Sprechstunden'),
            'displayname' => _('Terminvergabe'),
            'icon'        => Icon::create('consultation', Icon::ROLE_INFO),
            'icon_clickable' => Icon::create('consultation'),
            'screenshots' => [
                'path'     => 'assets/images/plus/screenshots/Terminvergabe',
                'pictures' => [
                    0 => ['source' => 'Uebersicht.jpg', 'title'  => _('Übersicht der erstellten Termine')],
                    1 => ['source' => 'Anlegen.jpg','title'  => _('Erstellen neuer Termine')]
                ]
             ]
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function exportUserData(StoredUserData $storage)
    {
        $storage->addTabularData(
            _('Terminblöcke'),
            'consultation_blocks',
            ConsultationBlock::findAndMapBySQL(
                function ($block) {
                    return $block->toRawArray();
                },
                "range_id = :user_id AND range_type = 'user'",
                [':user_id' => $storage->user_id]
            )
        );
        $storage->addTabularData(
            _('Terminbuchungen'),
            'consultation_bookings',
            ConsultationBooking::findAndMapBySQL(
                function ($booking) {
                    return $booking->toRawArray();
                },
                'user_id = :user_id',
                [':user_id' => $storage->user_id]
            )
        );
        $storage->addTabularData(
            _('Terminverantwortlichkeiten'),
            'consultation_responsibilities',
            ConsultationResponsibility::findAndMapBySQL(
                function ($responsibility) {
                    return $responsibility->toRawArray();
                },
                "range_id = :user_id AND range_type = 'user'",
                [':user_id' => $storage->user_id]
            )
        );
    }
}