<?php
namespace OCA\Gestion\Db;

use OCP\IDBConnection;
use \Datetime;
use OCA\Gestion\Constants\BddConstant;
use Ramsey\Uuid\Uuid;

class TalkDb {
    private $talkTablePrefix;

    private const DEVIS_TALK_ROOM_TYPE = 1;
    private const DEVIS_TALK_ROOM_ACTOR_TYPE = "users";
    private const DEVIS_TALK_ROOM_VERB_COMMENT = "comment";
    private const DEVIS_TALK_ROOM_VERB_INITIAL_MESSAGE = "system";
    private const DEVIS_TALK_ROOM_INITIAL_MESSAGE = '{"message":"conversation_created","parameters":[]}';
    private const DEVIS_TALK_ROOM_DEFAULT_MESSAGE_TYPE = "chat";
    private const DEVIS_TALK_ROOM_DEFAULT_PARTICIPANT_TYPE = 1;
    private $commentsTablePrefix;
    private IDbConnection $pdo;

    public function __construct(IDbConnection $db) {
        $this->talkTablePrefix = BddConstant::DEFAULT_TABLE_PREFIX ."talk_";
        $this->commentsTablePrefix = BddConstant::DEFAULT_TABLE_PREFIX;
        $this->pdo = $db;
    }

    private function execSQL($sql, $conditions){
        $stmt = $this->pdo->prepare($sql);
        $stmt->execute($conditions);
        $data = $stmt->fetchAll(\PDO::FETCH_ASSOC);
        $stmt->closeCursor();
        return json_encode($data);
    }

    private function execSQLNoData($sql, $conditions){
        $stmt = $this->pdo->prepare($sql);
        $stmt->execute($conditions);
        $stmt->closeCursor();
    }

    private function execSQLNoJsonReturn($sql, $conditions){
        $stmt = $this->pdo->prepare($sql);
        $stmt->execute($conditions);
        $data = $stmt->fetchAll(\PDO::FETCH_ASSOC);
        $stmt->closeCursor();
        return $data;
    }

    private function getDevisTalkRoomByName($name){
        $sql = "SELECT *
            FROM ".$this->talkTablePrefix."rooms as room
            WHERE room.name = ? ORDER BY room.id DESC LIMIT 1;";

        $rooms = $this->execSQLNoJsonReturn(
            $sql, 
            [$name]);

        if(!empty($rooms)){
            return $rooms[0];
        }
        return null;
    }

    private function createDevisTalkRoom($name,$token){
        $dateTime = new Datetime();
        $dateTime = $dateTime->format(('Y-m-d H:i:s'));
        $sql = "INSERT INTO `".$this->talkTablePrefix."rooms` (
        `name`,
        `token`,
        `type`,
        `last_activity`) VALUES (?,?,?,?);";
        $this->execSQLNoData($sql, array(
            $name,
            $token,
            self::DEVIS_TALK_ROOM_TYPE,
            $dateTime
        ));
        return true;
    }

    private function createDevisTalkRoomAttendeesByActors($actors,$roomId){
        foreach($actors as $actor){
            $this->createDevisTalkRoomAttendees($actor,$roomId);
        }
    }

    private function createDevisTalkRoomAttendees($idNextCloud,$roomId){
        $sql = "INSERT INTO `".$this->talkTablePrefix."attendees` (
            `room_id`,
            `actor_type`,
            `actor_id`,
            `display_name`,
            `participant_type`) VALUES (?,?,?,?,?);";
        $this->execSQLNoData($sql, array(
                $roomId,
                self::DEVIS_TALK_ROOM_ACTOR_TYPE,
                $idNextCloud,
                $idNextCloud,
                self::DEVIS_TALK_ROOM_DEFAULT_PARTICIPANT_TYPE
            ));
    }

    private function createDevisTalkRoomMessage($actorId,$message,$verb,$roomId,$reference = null){
        $datetime = new DateTime();
        $datetime = $datetime->format(('Y-m-d H:i:s'));
        $sql = "INSERT INTO `".$this->commentsTablePrefix."comments` (
            `actor_type`,
            `actor_id`,
            `message`,
            `verb`,
            `creation_timestamp`,
            `object_type`,
            `object_id`,
            `reference_id`
            ) VALUES (?,?,?,?,?,?,?,?);";
        $this->execSQLNoData($sql, array(
                self::DEVIS_TALK_ROOM_ACTOR_TYPE,         
                $actorId,
                $message,
                $verb,
                $datetime,
                self::DEVIS_TALK_ROOM_DEFAULT_MESSAGE_TYPE,
                $roomId,
                $reference
            ));
    }

    private function getDevisTalkRoomMessageByRoomAndMessage($roomId,$message){
        $sql = "SELECT *
            FROM ".$this->commentsTablePrefix."comments as comment
            WHERE comment.object_id = ? AND 
            comment.message = ? 
            ORDER BY comment.id DESC 
            LIMIT 1;";

        $messages = $this->execSQLNoJsonReturn(
            $sql, 
            [$roomId,$message]);

        if(!empty($messages)){
            return $messages[0];
        }
        return null;
    }

    public function getDevisTalkRoomByNames($names){
        $sql = "SELECT *
            FROM ".$this->talkTablePrefix."rooms as room
            WHERE room.name = ? OR room.name = ? LIMIT 1;";

        $rooms = $this->execSQLNoJsonReturn(
            $sql, 
            [$names['createdByUser'],$names['createdByAdmin']]);

        if(!empty($rooms)){
            return $rooms[0];
        }
        return null;
    }

    public function createDevisTalkRoomAndReturnDevisTalkRoom($idNextCloud,$token){
        $roomName = '["'.$idNextCloud.'","'.BddConstant::DEFAULT_ADMIN_APP_ID_NEXTCLOUD.'"]';
        $this->createDevisTalkRoom($roomName,$token);
        $room = $this->getDevisTalkRoomByName($roomName);
        $attendees = [
            $idNextCloud,
            BddConstant::DEFAULT_ADMIN_APP_ID_NEXTCLOUD
        ];
        $this->createDevisTalkRoomAttendeesByActors($attendees,$room['id']);
        return $room;
    }
    public function setDevisTalkRoomInitialMessageAndReturnMessage($roomId,$idNextCloud){
        $this->createDevisTalkRoomMessage(
            $idNextCloud,
            self::DEVIS_TALK_ROOM_INITIAL_MESSAGE,
            self::DEVIS_TALK_ROOM_VERB_INITIAL_MESSAGE,
            $roomId
        );

        $message = $this->getDevisTalkRoomMessageByRoomAndMessage($roomId,self::DEVIS_TALK_ROOM_INITIAL_MESSAGE);
        return $message;
    }

    public function setAttendeeLastReadMessage($roomId,$messageId,$idNextCloud){
        $sql = "UPDATE ".$this->talkTablePrefix."attendees as attendee
            SET 
            attendee.last_read_message = ? 
            WHERE attendee.room_id = ? AND 
            attendee.actor_id = ?;";
        $this->execSQLNoData(
                    $sql, 
                    [$messageId,$roomId,$idNextCloud]); 
    }

    public function createDevisTalkRoomMessageAndReturnMessage($roomId,$message){
        $this->createDevisTalkRoomMessage(
            BddConstant::DEFAULT_ADMIN_APP_ID_NEXTCLOUD,
            $message,
            self::DEVIS_TALK_ROOM_VERB_COMMENT,
            $roomId,
            Uuid::uuid4()->toString()
        );
        $message = $this->getDevisTalkRoomMessageByRoomAndMessage($roomId,$message);
        return $message;
    }

    public function updateDevisTalkRoomLastActivity($roomId,$datetime){
        $datetime = $datetime->format(('Y-m-d H:i:s'));
        $sql = "UPDATE ".$this->talkTablePrefix."rooms as room
            SET 
            room.last_activity = ? 
            WHERE room.id = ?;";
        $this->execSQLNoData(
                    $sql, 
                    [$datetime,$roomId]); 
    }

    public function updateRoomLastMessage($roomId,$lastMessageId){
        $sql = "UPDATE ".$this->talkTablePrefix."rooms as room
            SET 
            room.last_message = ? 
            WHERE room.id = ?;";
        $this->execSQLNoData(
                $sql, 
                [$lastMessageId,$roomId]); 
    }


}