<?php

global $utopia, $register, $request, $response, $projectDB, $project, $user, $audit, $mode, $clients;

use Utopia\Exception;
use Utopia\Response;
use Utopia\Config\Config;
use Utopia\Validator\Email;
use Utopia\Validator\Text;
use Utopia\Validator\Host;
use Utopia\Validator\Range;
use Utopia\Validator\ArrayList;
use Utopia\Validator\WhiteList;
use Utopia\Locale\Locale;
use Appwrite\Auth\Auth;
use Appwrite\Database\Database;
use Appwrite\Database\Document;
use Appwrite\Database\Validator\UID;
use Appwrite\Database\Validator\Authorization;
use Appwrite\Database\Exception\Duplicate;
use Appwrite\Template\Template;

include_once __DIR__ . '/../shared/api.php';

$utopia->post('/v1/teams')
    ->desc('Create Team')
    ->label('scope', 'teams.write')
    ->label('sdk.platform', [APP_PLATFORM_CLIENT, APP_PLATFORM_SERVER])
    ->label('sdk.namespace', 'teams')
    ->label('sdk.method', 'create')
    ->label('sdk.description', '/docs/references/teams/create-team.md')
    ->param('name', null, function () { return new Text(100); }, 'Team name.')
    ->param('roles', ['owner'], function () { return new ArrayList(new Text(128)); }, 'Array of strings. Use this param to set the roles in the team for the user who created it. The default role is **owner**. A role can be any string. Learn more about [roles and permissions](/docs/permissions).', true)
    ->action(
        function ($name, $roles) use ($response, $projectDB, $user, $mode) {
            Authorization::disable();

            $team = $projectDB->createDocument([
                '$collection' => Database::SYSTEM_COLLECTION_TEAMS,
                '$permissions' => [
                    'read' => ['team:{self}'],
                    'write' => ['team:{self}/owner'],
                ],
                'name' => $name,
                'sum' => ($mode !== APP_MODE_ADMIN && $user->getId()) ? 1 : 0,
                'dateCreated' => time(),
            ]);

            Authorization::reset();

            if (false === $team) {
                throw new Exception('Failed saving team to DB', 500);
            }

            if ($mode !== APP_MODE_ADMIN && $user->getId()) { // Don't add user on server mode
                $membership = new Document([
                    '$collection' => Database::SYSTEM_COLLECTION_MEMBERSHIPS,
                    '$permissions' => [
                        'read' => ['user:'.$user->getId(), 'team:'.$team->getId()],
                        'write' => ['user:'.$user->getId(), 'team:'.$team->getId().'/owner'],
                    ],
                    'userId' => $user->getId(),
                    'teamId' => $team->getId(),
                    'roles' => $roles,
                    'invited' => time(),
                    'joined' => time(),
                    'confirm' => true,
                    'secret' => '',
                ]);

                // Attach user to team
                $user->setAttribute('memberships', $membership, Document::SET_TYPE_APPEND);

                $user = $projectDB->updateDocument($user->getArrayCopy());

                if (false === $user) {
                    throw new Exception('Failed saving user to DB', 500);
                }
            }

            $response
                ->setStatusCode(Response::STATUS_CODE_CREATED)
                ->json($team->getArrayCopy())
            ;
        }
    );

$utopia->get('/v1/teams')
    ->desc('List Teams')
    ->label('scope', 'teams.read')
    ->label('sdk.platform', [APP_PLATFORM_CLIENT, APP_PLATFORM_SERVER])
    ->label('sdk.namespace', 'teams')
    ->label('sdk.method', 'list')
    ->label('sdk.description', '/docs/references/teams/list-teams.md')
    ->param('search', '', function () { return new Text(256); }, 'Search term to filter your list results.', true)
    ->param('limit', 25, function () { return new Range(0, 100); }, 'Results limit value. By default will return maximum 25 results. Maximum of 100 results allowed per request.', true)
    ->param('offset', 0, function () { return new Range(0, 2000); }, 'Results offset. The default value is 0. Use this param to manage pagination.', true)
    ->param('orderType', 'ASC', function () { return new WhiteList(['ASC', 'DESC']); }, 'Order result by ASC or DESC order.', true)
    ->action(
        function ($search, $limit, $offset, $orderType) use ($response, $projectDB) {
            $results = $projectDB->getCollection([
                'limit' => $limit,
                'offset' => $offset,
                'orderField' => 'dateCreated',
                'orderType' => $orderType,
                'orderCast' => 'int',
                'search' => $search,
                'filters' => [
                    '$collection='.Database::SYSTEM_COLLECTION_TEAMS,
                ],
            ]);

            $response->json(['sum' => $projectDB->getSum(), 'teams' => $results]);
        }
    );

$utopia->get('/v1/teams/:teamId')
    ->desc('Get Team')
    ->label('scope', 'teams.read')
    ->label('sdk.platform', [APP_PLATFORM_CLIENT, APP_PLATFORM_SERVER])
    ->label('sdk.namespace', 'teams')
    ->label('sdk.method', 'get')
    ->label('sdk.description', '/docs/references/teams/get-team.md')
    ->param('teamId', '', function () { return new UID(); }, 'Team unique ID.')
    ->action(
        function ($teamId) use ($response, $projectDB) {
            $team = $projectDB->getDocument($teamId);

            if (empty($team->getId()) || Database::SYSTEM_COLLECTION_TEAMS != $team->getCollection()) {
                throw new Exception('Team not found', 404);
            }

            $response->json($team->getArrayCopy([]));
        }
    );

$utopia->put('/v1/teams/:teamId')
    ->desc('Update Team')
    ->label('scope', 'teams.write')
    ->label('sdk.platform', [APP_PLATFORM_CLIENT, APP_PLATFORM_SERVER])
    ->label('sdk.namespace', 'teams')
    ->label('sdk.method', 'update')
    ->label('sdk.description', '/docs/references/teams/update-team.md')
    ->param('teamId', '', function () { return new UID(); }, 'Team unique ID.')
    ->param('name', null, function () { return new Text(100); }, 'Team name.')
    ->action(
        function ($teamId, $name) use ($response, $projectDB) {
            $team = $projectDB->getDocument($teamId);

            if (empty($team->getId()) || Database::SYSTEM_COLLECTION_TEAMS != $team->getCollection()) {
                throw new Exception('Team not found', 404);
            }

            $team = $projectDB->updateDocument(array_merge($team->getArrayCopy(), [
                'name' => $name,
            ]));

            if (false === $team) {
                throw new Exception('Failed saving team to DB', 500);
            }

            $response->json($team->getArrayCopy());
        }
    );

$utopia->delete('/v1/teams/:teamId')
    ->desc('Delete Team')
    ->label('scope', 'teams.write')
    ->label('sdk.platform', [APP_PLATFORM_CLIENT, APP_PLATFORM_SERVER])
    ->label('sdk.namespace', 'teams')
    ->label('sdk.method', 'delete')
    ->label('sdk.description', '/docs/references/teams/delete-team.md')
    ->param('teamId', '', function () { return new UID(); }, 'Team unique ID.')
    ->action(
        function ($teamId) use ($response, $projectDB) {
            $team = $projectDB->getDocument($teamId);

            if (empty($team->getId()) || Database::SYSTEM_COLLECTION_TEAMS != $team->getCollection()) {
                throw new Exception('Team not found', 404);
            }

            $memberships = $projectDB->getCollection([
                'limit' => 2000, // TODO add members limit
                'offset' => 0,
                'filters' => [
                    '$collection='.Database::SYSTEM_COLLECTION_MEMBERSHIPS,
                    'teamId='.$teamId,
                ],
            ]);

            foreach ($memberships as $member) {
                if (!$projectDB->deleteDocument($member->getId())) {
                    throw new Exception('Failed to remove membership for team from DB', 500);
                }
            }

            if (!$projectDB->deleteDocument($teamId)) {
                throw new Exception('Failed to remove team from DB', 500);
            }

            $response->noContent();
        }
    );

$utopia->post('/v1/teams/:teamId/memberships')
    ->desc('Create Team Membership')
    ->label('scope', 'teams.write')
    ->label('sdk.platform', [APP_PLATFORM_CLIENT, APP_PLATFORM_SERVER])
    ->label('sdk.namespace', 'teams')
    ->label('sdk.method', 'createMembership')
    ->label('sdk.description', '/docs/references/teams/create-team-membership.md')
    ->param('teamId', '', function () { return new UID(); }, 'Team unique ID.')
    ->param('email', '', function () { return new Email(); }, 'New team member email.')
    ->param('name', '', function () { return new Text(100); }, 'New team member name.', true)
    ->param('roles', [], function () { return new ArrayList(new Text(128)); }, 'Array of strings. Use this param to set the user roles in the team. A role can be any string. Learn more about [roles and permissions](/docs/permissions).')
    ->param('url', '', function () use ($clients) { return new Host($clients); }, 'URL to redirect the user back to your app from the invitation email.') // TODO add our own built-in confirm page
    ->action(
        function ($teamId, $email, $name, $roles, $url) use ($response, $register, $project, $user, $audit, $projectDB) {
            $name = (empty($name)) ? $email : $name;
            $team = $projectDB->getDocument($teamId);

            if (empty($team->getId()) || Database::SYSTEM_COLLECTION_TEAMS != $team->getCollection()) {
                throw new Exception('Team not found', 404);
            }

            $memberships = $projectDB->getCollection([
                'limit' => 50,
                'offset' => 0,
                'filters' => [
                    '$collection='.Database::SYSTEM_COLLECTION_MEMBERSHIPS,
                    'teamId='.$team->getId(),
                ],
            ]);

            $invitee = $projectDB->getCollection([ // Get user by email address
                'limit' => 1,
                'first' => true,
                'filters' => [
                    '$collection='.Database::SYSTEM_COLLECTION_USERS,
                    'email='.$email,
                ],
            ]);

            if (empty($invitee)) { // Create new user if no user with same email found

                Authorization::disable();

                try {
                    $invitee = $projectDB->createDocument([
                        '$collection' => Database::SYSTEM_COLLECTION_USERS,
                        '$permissions' => [
                            'read' => ['user:{self}', '*'],
                            'write' => ['user:{self}'],
                        ],
                        'email' => $email,
                        'emailVerification' => false,
                        'status' => Auth::USER_STATUS_UNACTIVATED,
                        'password' => Auth::passwordHash(Auth::passwordGenerator()),
                        'password-update' => time(),
                        'registration' => time(),
                        'reset' => false,
                        'name' => $name,
                        'tokens' => [],
                    ], ['email' => $email]);
                } catch (Duplicate $th) {
                    throw new Exception('Account already exists', 409);
                }

                Authorization::reset();

                if (false === $invitee) {
                    throw new Exception('Failed saving user to DB', 500);
                }
            }

            $isOwner = false;

            foreach ($memberships as $member) {
                if ($member->getAttribute('userId') ==  $invitee->getId()) {
                    throw new Exception('User has already been invited or is already a member of this team', 409);
                }

                if ($member->getAttribute('userId') == $user->getId() && in_array('owner', $member->getAttribute('roles', []))) {
                    $isOwner = true;
                }
            }

            if (!$isOwner) {
                throw new Exception('User is not allowed to send invitations for this team', 401);
            }

            $secret = Auth::tokenGenerator();

            $membership = new Document([
                '$collection' => Database::SYSTEM_COLLECTION_MEMBERSHIPS,
                '$permissions' => [
                    'read' => ['*'],
                    'write' => ['user:'.$invitee->getId(), 'team:'.$team->getId().'/owner'],
                ],
                'userId' => $invitee->getId(),
                'teamId' => $team->getId(),
                'roles' => $roles,
                'invited' => time(),
                'joined' => 0,
                'confirm' => false,
                'secret' => Auth::hash($secret),
            ]);

            $membership = $projectDB->createDocument($membership->getArrayCopy());

            if (false === $membership) {
                throw new Exception('Failed saving membership to DB', 500);
            }

            $url = Template::parseURL($url);
            $url['query'] = Template::mergeQuery(((isset($url['query'])) ? $url['query'] : ''), ['inviteId' => $membership->getId(), 'teamId' => $team->getId(), 'userId' => $invitee->getId(), 'secret' => $secret, 'teamId' => $teamId]);
            $url = Template::unParseURL($url);

            $body = new Template(__DIR__.'/../../config/locales/templates/'.Locale::getText('account.emails.invitation.body'));
            $body
                ->setParam('{{direction}}', Locale::getText('settings.direction'))
                ->setParam('{{project}}', $project->getAttribute('name', ['[APP-NAME]']))
                ->setParam('{{team}}', $team->getAttribute('name', '[TEAM-NAME]'))
                ->setParam('{{owner}}', $user->getAttribute('name', ''))
                ->setParam('{{redirect}}', $url)
            ;

            $mail = $register->get('smtp'); /* @var $mail \PHPMailer\PHPMailer\PHPMailer */

            $mail->addAddress($email, $name);

            $mail->Subject = sprintf(Locale::getText('account.emails.invitation.title'), $team->getAttribute('name', '[TEAM-NAME]'), $project->getAttribute('name', ['[APP-NAME]']));
            $mail->Body = $body->render();
            $mail->AltBody = strip_tags($body->render());

            try {
                $mail->send();
            } catch (\Exception $error) {
                throw new Exception('Error sending mail: ' . $error->getMessage(), 500);
            }

            $audit
                ->setParam('userId', $invitee->getId())
                ->setParam('event', 'teams.membership.create')
                ->setParam('resource', 'teams/'.$teamId)
            ;

            $response
                ->setStatusCode(Response::STATUS_CODE_CREATED) // TODO change response of this endpoint
                ->json(array_merge($membership->getArrayCopy([
                    '$id',
                    'userId',
                    'teamId',
                    'roles',
                    'invited',
                    'joined',
                    'confirm',
                ]), [
                    'email' => $email,
                    'name' => $name,
                ]))
            ;
        }
    );

$utopia->get('/v1/teams/:teamId/memberships')
    ->desc('Get Team Memberships')
    ->label('scope', 'teams.read')
    ->label('sdk.platform', [APP_PLATFORM_CLIENT, APP_PLATFORM_SERVER])
    ->label('sdk.namespace', 'teams')
    ->label('sdk.method', 'getMemberships')
    ->label('sdk.description', '/docs/references/teams/get-team-members.md')
    ->param('teamId', '', function () { return new UID(); }, 'Team unique ID.')
    ->action(
        function ($teamId) use ($response, $projectDB) {
            $team = $projectDB->getDocument($teamId);

            if (empty($team->getId()) || Database::SYSTEM_COLLECTION_TEAMS != $team->getCollection()) {
                throw new Exception('Team not found', 404);
            }

            $memberships = $projectDB->getCollection([
                'limit' => 50,
                'offset' => 0,
                'filters' => [
                    '$collection='.Database::SYSTEM_COLLECTION_MEMBERSHIPS,
                    'teamId='.$teamId,
                ],
            ]);

            $users = [];

            foreach ($memberships as $membership) {
                if (empty($membership->getAttribute('userId', null))) {
                    continue;
                }

                $temp = $projectDB->getDocument($membership->getAttribute('userId', null))->getArrayCopy(['email', 'name']);

                $users[] = array_merge($temp, $membership->getArrayCopy([
                    '$id',
                    'userId',
                    'teamId',
                    'roles',
                    'invited',
                    'joined',
                    'confirm',
                ]));
            }

            usort($users, function ($a, $b) {
                if ($a['joined'] === 0 || $b['joined'] === 0) {
                    return $b['joined'] - $a['joined'];
                }

                return $a['joined'] - $b['joined'];
            });

            $response->json($users);
        }
    );

$utopia->patch('/v1/teams/:teamId/memberships/:inviteId/status')
    ->desc('Update Team Membership Status')
    ->label('scope', 'public')
    ->label('sdk.platform', [APP_PLATFORM_CLIENT])
    ->label('sdk.namespace', 'teams')
    ->label('sdk.method', 'updateMembershipStatus')
    ->label('sdk.description', '/docs/references/teams/update-team-membership-status.md')
    ->param('teamId', '', function () { return new UID(); }, 'Team unique ID.')
    ->param('inviteId', '', function () { return new UID(); }, 'Invite unique ID.')
    ->param('userId', '', function () { return new UID(); }, 'User unique ID.')
    ->param('secret', '', function () { return new Text(256); }, 'Secret key.')
    ->action(
        function ($teamId, $inviteId, $userId, $secret) use ($response, $request, $user, $audit, $projectDB) {
            $protocol = Config::getParam('protocol');
            $membership = $projectDB->getDocument($inviteId);

            if (empty($membership->getId()) || Database::SYSTEM_COLLECTION_MEMBERSHIPS != $membership->getCollection()) {
                throw new Exception('Invite not found', 404);
            }

            if ($membership->getAttribute('teamId') !== $teamId) {
                throw new Exception('Team IDs don\'t match', 404);
            }

            Authorization::disable();

            $team = $projectDB->getDocument($teamId);
            
            Authorization::reset();

            if (empty($team->getId()) || Database::SYSTEM_COLLECTION_TEAMS != $team->getCollection()) {
                throw new Exception('Team not found', 404);
            }

            if (Auth::hash($secret) !== $membership->getAttribute('secret')) {
                throw new Exception('Secret key not valid', 401);
            }

            if ($userId != $membership->getAttribute('userId')) {
                throw new Exception('Invite not belong to current user ('.$user->getAttribute('email').')', 401);
            }

            if (empty($user->getId())) {
                $user = $projectDB->getCollection([ // Get user
                    'limit' => 1,
                    'first' => true,
                    'filters' => [
                        '$collection='.Database::SYSTEM_COLLECTION_USERS,
                        '$id='.$userId,
                    ],
                ]);
            }

            if ($membership->getAttribute('userId') !== $user->getId()) {
                throw new Exception('Invite not belong to current user ('.$user->getAttribute('email').')', 401);
            }

            $membership // Attach user to team
                ->setAttribute('joined', time())
                ->setAttribute('confirm', true)
            ;

            $user
                ->setAttribute('emailVerification', true)
                ->setAttribute('memberships', $membership, Document::SET_TYPE_APPEND)
            ;

            // Log user in
            $expiry = time() + Auth::TOKEN_EXPIRATION_LOGIN_LONG;
            $secret = Auth::tokenGenerator();

            $user->setAttribute('tokens', new Document([
                '$collection' => Database::SYSTEM_COLLECTION_TOKENS,
                '$permissions' => ['read' => ['user:'.$user->getId()], 'write' => ['user:'.$user->getId()]],
                'type' => Auth::TOKEN_TYPE_LOGIN,
                'secret' => Auth::hash($secret), // On way hash encryption to protect DB leak
                'expire' => $expiry,
                'userAgent' => $request->getServer('HTTP_USER_AGENT', 'UNKNOWN'),
                'ip' => $request->getIP(),
            ]), Document::SET_TYPE_APPEND);

            Authorization::setRole('user:'.$userId);

            $user = $projectDB->updateDocument($user->getArrayCopy());

            if (false === $user) {
                throw new Exception('Failed saving user to DB', 500);
            }

            Authorization::disable();

            $team = $projectDB->updateDocument(array_merge($team->getArrayCopy(), [
                'sum' => $team->getAttribute('sum', 0) + 1,
            ]));

            Authorization::reset();

            if (false === $team) {
                throw new Exception('Failed saving team to DB', 500);
            }

            $audit
                ->setParam('userId', $user->getId())
                ->setParam('event', 'teams.membership.update')
                ->setParam('resource', 'teams/'.$teamId)
            ;

            if(!Config::getParam('domainVerification')) {
                $response
                    ->addHeader('X-Fallback-Cookies', json_encode([Auth::$cookieName => Auth::encodeSession($user->getId(), $secret)]))
                ;
            }

            $response
                ->addCookie(Auth::$cookieName.'_legacy', Auth::encodeSession($user->getId(), $secret), $expiry, '/', COOKIE_DOMAIN, ('https' == $protocol), true, null)
                ->addCookie(Auth::$cookieName, Auth::encodeSession($user->getId(), $secret), $expiry, '/', COOKIE_DOMAIN, ('https' == $protocol), true, COOKIE_SAMESITE)
                ->json(array_merge($membership->getArrayCopy([
                    '$id',
                    'userId',
                    'teamId',
                    'roles',
                    'invited',
                    'joined',
                    'confirm',
                ]), [
                    'email' => $user->getAttribute('email'),
                    'name' => $user->getAttribute('name'),
                ]))
            ;
        }
    );

$utopia->delete('/v1/teams/:teamId/memberships/:inviteId')
    ->desc('Delete Team Membership')
    ->label('scope', 'teams.write')
    ->label('sdk.platform', [APP_PLATFORM_CLIENT, APP_PLATFORM_SERVER])
    ->label('sdk.namespace', 'teams')
    ->label('sdk.method', 'deleteMembership')
    ->label('sdk.description', '/docs/references/teams/delete-team-membership.md')
    ->param('teamId', '', function () { return new UID(); }, 'Team unique ID.')
    ->param('inviteId', '', function () { return new UID(); }, 'Invite unique ID.')
    ->action(
        function ($teamId, $inviteId) use ($response, $projectDB, $audit) {
            $membership = $projectDB->getDocument($inviteId);

            if (empty($membership->getId()) || Database::SYSTEM_COLLECTION_MEMBERSHIPS != $membership->getCollection()) {
                throw new Exception('Invite not found', 404);
            }

            if ($membership->getAttribute('teamId') !== $teamId) {
                throw new Exception('Team IDs don\'t match', 404);
            }

            $team = $projectDB->getDocument($teamId);

            if (empty($team->getId()) || Database::SYSTEM_COLLECTION_TEAMS != $team->getCollection()) {
                throw new Exception('Team not found', 404);
            }

            if (!$projectDB->deleteDocument($membership->getId())) {
                throw new Exception('Failed to remove membership from DB', 500);
            }

            $team = $projectDB->updateDocument(array_merge($team->getArrayCopy(), [
                'sum' => $team->getAttribute('sum', 0) - 1,
            ]));

            if (false === $team) {
                throw new Exception('Failed saving team to DB', 500);
            }

            $audit
                ->setParam('userId', $membership->getAttribute('userId'))
                ->setParam('event', 'teams.membership.delete')
                ->setParam('resource', 'teams/'.$teamId)
            ;

            $response->noContent();
        }
    );
