package WebGUI::AssetAspect::Subscriber;

use strict;
use warnings;
use 5.010;
use Class::C3;
use Carp;

use WebGUI::Asset::Template;
use WebGUI::Macro;
use WebGUI::Mail::Send;
use WebGUI::Group;
use WebGUI::Asset;
use WebGUI::Form;
use WebGUI::User::SpecialState;
use WebGUI::International;
use Tie::IxHash;
use URI;

#----------------------------------------------------------------------------
sub definition {
	my $class       = shift;
	my $session     = shift;
	my $definition  = shift;
	my $i18n        = WebGUI::International->new( $session,'AssetAspect_Subscriber' );

	tie my %properties, 'Tie::IxHash', (
        listName                    => {
            fieldType       => 'text',
            label           => $i18n->echo("List name"),
            tab             => 'subscription',
        },
        subscriptionGroupId         => {
            fieldType       => 'subscriptionGroup',
            label           => $i18n->get( 'Subscription group' ),
            tab             => 'subscription',
            noFormPost      => 1,
        },
        subscriptionEnabled         => {
            fieldType       => 'yesNo',
            defaultValue    => 1,
            label           => $i18n->get( 'Enable subscription' ),
            tab             => 'subscription',
        },
        alwaysConfirmSubscription   => {
            fieldType       => 'yesNo',
            defaultValue    => 0,
            label           => $i18n->get( 'require confirmation' ),
            tab             => 'subscription',
        },
        allowAnonymousSubscription  => {
            fieldType       => 'yesNo',
            defaultValue    => 1,
            label           => $i18n->get( 'allow anonymous' ),
            tab             => 'subscription',
        },
        confirmationRequiredTemplateId => {
            fieldType       => 'template',
            defaultValue    => 'd1tQuv-OlPwgz6PnLcq-hA',
            label           => $i18n->get( 'confirmation required template' ),
            namespace       => 'Subscriber/ConfirmationRequired',
            tab             => 'subscription',
        },
        confirmationEmailSubject    => {
            fieldType       => 'text',
            defaultValue    => 'Confirm your subscription mutation',
            label           => $i18n->get( 'confirmation email subject' ),
            tab             => 'subscription',
        },
        confirmationEmailTemplateId => {
            fieldType       => 'template',
            defaultValue    => '4aLemgMrTFhG3eqg57jCpQ',
            label           => $i18n->get( 'confirmation email template' ),
            namespace       => 'Subscriber/ConfirmationEmail',
            tab             => 'subscription',
        },
        noMutationEmailSubject      => {
            fieldType       => 'text',
            defaultValue    => '(Un)subscribe result',
            label           => $i18n->get( 'no mutation subject' ),
            tab             => 'subscription',
        },
        noMutationEmailTemplateId   => {
            fieldType       => 'template',
            defaultValue    => 'Q8t7dUqMk05D2m7Jbgg4BQ',
            label           => $i18n->get( 'no mutation template' ),
            namespace       => 'Subscriber/NoMutationEmail',
            tab             => 'subscription',
        },
	);

	push( @{ $definition }, {
		autoGenerateForms   => 1,
		tableName           => 'assetAspectSubscriber',
		className           => 'WebGUI::AssetAspect::Subscriber',
		properties          => \%properties
	} );

	return $class->next::method( $session, $definition );
}

#----------------------------------------------------------------------------
sub duplicate {
    my $self        = shift;
    my $properties  = shift;
    my $newSelf     = $self->next::method( $properties );

    $newSelf->update({ subscriptionGroupId => '' });
    $newSelf->createSubscriptionGroup;

    return $newSelf;
}

#----------------------------------------------------------------------------
sub getEditTabs {
    my $self = shift;
    my $session = $self->session;
    my $i18n    = WebGUI::International->new( $session, 'AssetAspect_Subscriber' );

    return ( $self->next::method, [ 'subscription', $i18n->get('tab name'), 9 ] );
}

#----------------------------------------------------------------------------
sub getListHeaders {
    my $self    = shift;
    my $email   = shift || return {};

    my $site    = $self->session->url->getSiteURL;

    my $headers = {
        'List-Unsubscribe'  =>
            '<' . $site . $self->getUrl( "func=processSubscription&action=unsubscribe&email=$email" ) . '>',
        'List-Subscribe'    =>
            '<' . $site . $self->getUrl( "func=processSubscription&action=subscribe&email=$email" ) . '>',
        'List-Archives'     =>
            '<' . $site . $self->getUrl . '>',
    };

    return $headers;
}

#----------------------------------------------------------------------------
sub canSubscribe {
    my $self = shift;

    return !$self->session->user->isVisitor && !$self->isSubscribed;
}

#----------------------------------------------------------------------------
sub canUnsubscribe {
    my $self = shift;

    return !$self->session->user->isVisitor && $self->isSubscribed;
}

#----------------------------------------------------------------------------
sub createSubscriptionGroup {
    my $self = shift;

    if ( my $groupId = $self->get('subscriptionGroupId') ) {
        return WebGUI::Group->new( $self->session, $groupId );
    }
    else {
        my $group = WebGUI::Group->new($self->session, "new");
        $group->name( "Subscription " . $self->getTitle );
        $group->description( "Subscription Group for " . $self->getTitle . "(" . $self->getId . ")" );
        $group->isEditable( 0 );
        $group->showInForms( 0 );
        $group->deleteGroups( [ "3" ] ); # admins don't want to be auto subscribed to this thing
        $self->update({
            subscriptionGroupId => $group->getId
        });

        return $group;
    }
}

#----------------------------------------------------------------------------
sub isSubscribed {
    my $self    = shift;
    my $user    = shift || $self->session->user;
    my $db      = $self->session->db;

    return $user->isInGroup( $self->getSubscriptionGroup->getId );
}

#----------------------------------------------------------------------------
sub appendSubscriptionFormVars {
    my $self    = shift;
    my $var     = shift || {};
    my $session = $self->session;
    my $i18n    = WebGUI::International->new( $session, 'AssetAspect_Subscriber' );

    # Setup form controls
    my $formHeader =
        WebGUI::Form::formHeader( $session, { action => $self->getUrl } )
        . WebGUI::Form::hidden( $session, { name => 'func', value => 'processSubscription' } )
        ;
    my $subscribeButton =
        sprintf '<button type="submit" name="action" value="subscribe">%s</button>', $i18n->get('subscribe');
    my $unsubscribeButton =
        sprintf '<button type="submit" name="action" value="unsubscribe">%s</button>', $i18n->get('unsubscribe');
    my $emailBox = WebGUI::Form::email( $session, { name => 'email', value => '' } );
    my $formFooter = WebGUI::Form::formFooter( $session );

    # Compose default subscription form for current user
    my $form = '';
    if ( $session->user->isRegistered ) {
        $form .= $subscribeButton     if $self->canSubscribe;
        $form .= $unsubscribeButton   if $self->canUnsubscribe;
    }
    elsif ( $self->get('allowAnonymousSubscription') ) {
        $form = $emailBox . $subscribeButton . $unsubscribeButton;
    }

    # Setup tmpl_vars
    $var->{ subscriptionForm_form               } = "$formHeader $form $formFooter" if $form;
    $var->{ subscriptionForm_header             } = $formHeader;
    $var->{ subscriptionForm_footer             } = $formFooter;
    $var->{ subscriptionForm_subscribeButton    } = $subscribeButton;
    $var->{ subscriptionForm_unsubscribeButton  } = $unsubscribeButton;
    $var->{ subscrittionForm_emailBox           } = $emailBox;
    $var->{ user_canSubscribe                   } = $self->canSubscribe;
    $var->{ user_canUnsubscribe                 } = $self->canUnsubscribe;
    $var->{ user_isRegistered                   } = $session->user->isRegistered;

    return $var;
}

#----------------------------------------------------------------------------
sub getSubscriptionGroup {
    my $self    = shift;
    my $groupId = $self->get( "subscriptionGroupId" );
    my $group   = $groupId
                ? WebGUI::Group->new( $self->session, $groupId )
                : $self->createSubscriptionGroup
                ;

    return $group;
}

#----------------------------------------------------------------------------
sub getReturnUrl {
    my $self    = shift;
    my $referer = $self->session->env->get('HTTP_REFERER');

    return unless $referer;

    # Get path and strip leading and trailing slash if it exists.
    my ( $path ) = URI->new( $referer )->path =~ m{ ^/  (.*?)  /?$ }xms;

    return $referer if WebGUI::Asset->urlExists( $self->session, $path );

    return;
}

#----------------------------------------------------------------------------
sub getEmailVars {
    my $self    = shift;
    my $user    = shift;

    my $var     = {};

    my $userProperties = $user->get;
    while ( my ($key, $value) = each %{ $userProperties } ) {
        $var->{ "user_$key" } = $value;
    }
    $var->{ user_isRegular } = !WebGUI::User::SpecialState->isAdHocUser( $user );

    my $assetProperties = $self->get;
    while ( my ($key, $value) = each %{ $assetProperties } ) {
        $var->{ "asset_$key" } = $value;
    }

    return $var;
}

#----------------------------------------------------------------------------
sub getAssetByListName {
    my $class       = shift;
    my $session     = shift;
    my $listName    = shift || return;
    my $db          = $session->db;

    my $assetId = $db->quickScalar( 'select assetId from assetAspectSubscriber where listName=? limit 1', [
        $listName
    ] );

    return unless $assetId;

    my $asset = WebGUI::Asset->newByDynamicClass( $session, $assetId );

    return $asset;
}

#----------------------------------------------------------------------------
sub processPropertiesFromFormPost {
    my $self    = shift;
    my $session = $self->session;
    my $form    = $session->form;

    my $listName    = $form->get('listName');
    my $asset       = WebGUI::AssetAspect::Subscriber->getAssetByListName( $session, $listName );

    my $errors      = $self->next::method;

    if ( $asset && $asset->getId ne $self->getId ) {
        return [
            @{ $errors || [] },
            "List name $listName is already taken."
        ];
    }

    return $errors;
}

#----------------------------------------------------------------------------
sub sendSubscriptionConfirmation {
    my $self    = shift;
    my $user    = shift;
    my $code    = shift;
    my $action  = shift || 'subscribe';
    my $session = $self->session;
    my $i18n    = WebGUI::International->new( $session, 'AssetAspect_Subscriber' );

    my $var     = $self->getEmailVars( $user );
    my $url     = $session->url->getSiteURL . $self->getUrl( "func=confirmMutation;code=$code" );

    $var->{ confirmUrl          } = $url;
    $var->{ code                } = $code;
    $var->{ actionIsSubscribe   } = $action eq 'subscribe';

    my $mail = WebGUI::Mail::Send->create( $self->session, {
        to          => $user->get('email'),
        subject     => $self->get('confirmationEmailSubject'),
        contentType => 'multipart/alternative',
    } );

    my $templateId  = $self->get('confirmationEmailTemplateId');
    my $template    = WebGUI::Asset::Template->new( $session, $templateId );
    if ( $template ) {
        my $content = $template->process( $var );

        $mail->addHtml( $content );
        $mail->addText( $self->transformToText( $content ) );
    }
    else {
        $session->log->error( "Cannot instanciate confirmation email template with id [$templateId]" );
        $mail->addText( sprintf $i18n->get( 'click to confirm fallback' ), $url );
    }

    $mail->send;

    return;
}

#----------------------------------------------------------------------------
sub sendNoMutationEmail {
    my $self    = shift;
    my $user    = shift;
    my $action  = shift || 'subscribe';
    my $session = $self->session;
    my $i18n    = WebGUI::International->new( $session, 'AssetAspect_Subscriber' );

    my $var     = $self->getEmailVars( $user );
    $var->{ actionIsSubscribe   } = $action eq 'subscribe';

    my $mail = WebGUI::Mail::Send->create( $self->session, {
        to          => $user->get('email'),
        subject     => $self->get('noMutationEmailSubject'),
        contentType => 'multipart/alternative',
    } );

    my $templateId  = $self->get('noMutationEmailTemplateId');
    my $template    = WebGUI::Asset::Template->new( $session, $templateId );
    if ( $template ) {
        my $content = $template->process( $var );

        $mail->addHtml( $content );
        $mail->addText( $self->transformToText( $content ) );
    }
    else {
        $session->log->error( "Cannot instanciate no mutation email template with id [$templateId]" );
        if ( $action eq 'subscribe' ) {
            $mail->addText( sprintf $i18n->get('already subscribed fallback'), $self->get('title') );
        }
    }

    $mail->send;

    return;
}

sub transformToText {
    my $self    = shift;
    my $html    = shift;

    my $text = $html;
    #HTML::Entities::decode($text);
    $text =~ s/<a.*?href=["'](.*?)['"].*?>(.+?)<\/a>/$2 ($1)/g;
    $text = WebGUI::HTML::html2text($text);

    return $text;
}

#----------------------------------------------------------------------------
sub logConfirmation {
    my $self    = shift;
    my $code    = shift || return;
    my $session = $self->session;
    my $db      = $session->db;

    $db->write(
         ' update assetAspectSubscriber_log set '
        .' confirmationIp=?, confirmationDate=?, confirmed=? where code=? and assetId=?',
        [
            $session->env->getIp,
            time(),
            1,
            $code,
            $self->getId,
        ]
    );

    return;
};

#----------------------------------------------------------------------------
sub logRequest {
    my $self    = shift;
    my $type    = shift || croak 'No type passed to logrequest';
    my $user    = shift || croak 'No user passed to logRequest';
    my $code    = shift;
    my $session = $self->session;
    my $db      = $session->db;

    $db->write(
            ' insert into assetAspectSubscriber_log set '
        .' assetId=?, requestIp=?, requestDate=?, code=?, confirmed=?, anonymous=?, type=?, userId=?, email=?',
        [
            $self->getId,
            $session->env->getIp,
            time(),
            $code,
            0,
            $self->session->user->isVisitor,
            $type,
            $user->getId,
            $user->get('email'),
        ]
    );

    return;
};

#----------------------------------------------------------------------------
sub subscribe {
    my $self            = shift;
    my $user            = shift || $self->session->user;
    my $requireConfirm  = shift // $self->get('alwaysConfirmSubscription');
    my $session         = $self->session;


    if ( $requireConfirm ) {
        if ( $user->isInGroup( $self->getSubscriptionGroup->getId ) ) {
            $self->sendNoMutationEmail( $user, 'subscribe' );
            $self->logRequest( 'already_subscribed', $user );
        }
        else {
            my $code = $self->session->id->generate;
            $self->logRequest( 'subscribe', $user, $code );

            $self->sendSubscriptionConfirmation( $user, $code, 'subscribe' );
        }
    }
    else {
        $self->getSubscriptionGroup->addUsers( [ $user->getId ] );
        $self->logRequest( 'subscribe', $user );
    }

    return;
}

#----------------------------------------------------------------------------
sub unsubscribe {
    my $self    = shift;
    my $user    = shift || $self->session->user;
    my $requireConfirm  = shift // $self->get('alwaysConfirmSubscription');

    my $session         = $self->session;

    if ( $requireConfirm ) {
        if ( !$user->isInGroup( $self->getSubscriptionGroup->getId ) ) {
            $self->sendNoMutationEmail( $user, 'unsubscribe' );
            $self->logRequest( 'already_unsubscribed', $user );
        }
        else {
            my $code = $self->session->id->generate;
            $self->logRequest( 'unsubscribe', $user, $code );

            $self->sendSubscriptionConfirmation( $user, $code, 'unsubscribe' );
        }
    }
    else {
        $self->getSubscriptionGroup->deleteUsers( [ $user->getId ] );
        $self->logRequest( 'unsubscribe', $user );
    }

    return;
}

#----------------------------------------------------------------------------
sub www_confirmMutation {
    my $self    = shift;
    my $session = $self->session;
    my $i18n    = WebGUI::International->new( $session, 'AssetAspect_Subscriber' );
    my ($form, $db) = $session->quick( 'form', 'db' );

    my $code    = $form->get('code');
    return unless $code;

    my ($userId, $type) = $db->quickArray(
        'select userId, type from assetAspectSubscriber_log where confirmed=? and code=?',
        [
            0,
            $code,
        ]
    );

    if ( $userId ) {
        $self->logConfirmation( $code );

        if ( $type eq 'subscribe' ) {
            $self->getSubscriptionGroup->addUsers( [ $userId ] );
            return $self->processStyle( sprintf $i18n->get( 'subscription successful'), $self->getUrl );
        }
        elsif ( $type eq 'unsubscribe' ) {
            $self->getSubscriptionGroup->deleteUsers( [ $userId ] );
            return $self->processStyle( sprintf $i18n->get( 'unsubscription successful' ), $self->getUrl );
        }
    }

    return $self->processStyle( $i18n->get( 'wrong code' ) );

}

#----------------------------------------------------------------------------
sub subscribeAnonymous {
    my $self    = shift;
    my $email   = shift; # TODO || return ?
    my $session = $self->session;

    my $emailUser = WebGUI::User::SpecialState->newByEmail( $session, $email );

    # If email address doesn't have an account, create one.
    if ( !defined $emailUser ) {
        $emailUser = WebGUI::User::SpecialState->create( $session );
        $emailUser->update( { email => $email } );
    }
    $emailUser->addSpecialState( 'Subscriber', $self->getId );

    $self->subscribe( $emailUser, 1 );

    return;
}

#----------------------------------------------------------------------------
sub unsubscribeAnonymous {
    my $self    = shift;
    my $email   = shift;
    my $session = $self->session;

    my $emailUser = WebGUI::User::SpecialState->newByEmail( $session, $email );
    if ( defined $emailUser ) {
        $self->unsubscribe( $emailUser, 1 );
    }

    return;
}

#----------------------------------------------------------------------------
sub www_processSubscription {
    my $self    = shift;
    my $session = $self->session;
    my $form    = $session->form;
    my $i18n    = WebGUI::International->new( $session, 'AssetAspect_Subscriber' );

    my $action  = $form->get( 'action' );
    return unless $action eq 'subscribe' || $action eq 'unsubscribe';

    if ( $session->user->isRegistered ) {
        if ( $action eq 'subscribe' && $self->canSubscribe ) {
            $self->subscribe;
        }
        if ( $action eq 'unsubscribe' && $self->canUnsubscribe ) {
            $self->unsubscribe;
        }

        return unless $self->get('alwaysConfirmSubscription');
    }
    elsif ( $self->get('allowAnonymousSubscription') ) {
        my $email     = $form->email( 'email' );
        return 'Error: no email address passed' unless $email;

        given ( $action ) {
            when ( 'unsubscribe' ) { $self->unsubscribeAnonymous( $email ); }
            when ( 'subscribe'   ) { $self->subscribeAnonymous( $email );   }
        }
    }
    else {
        return $self->processStyle( $i18n->get( 'anonnymous not allowed' ) );
    }

    my $var = {
        assetUrl    => $self->getUrl,
        returnUrl   => $self->getReturnUrl,
    };

    return $self->processStyle( $self->processTemplate( $var, $self->get('confirmationRequiredTemplateId') ) );
}

#----------------------------------------------------------------------------
sub www_subscribe {
    my $self    = shift;

    if ( $self->canSubscribe ) {
        $self->subscribe;
    }

    return $self->www_view;
}

#----------------------------------------------------------------------------
sub www_unsubscribe {
    my $self    = shift;

    if ( $self->canUnsubscribe ) {
        $self->unsubscribe;
    }

    return $self->www_view;
}

1;