<?php

namespace Chatify;

use App\Models\ChMessage as Message;
use App\Models\ChFavorite as Favorite;
use Pusher\Pusher;
use Illuminate\Support\Facades\Auth;
use Exception;
use Illuminate\Support\Facades\File;

class ChatifyMessenger
{

    public $pusher;

    /**
     * Get max file's upload size in MB.
     *
     * @return int
     */
    public function getMaxUploadSize(){
        return config('chatify.attachments.max_upload_size') * 1048576;
    }

    public function __construct()
    {
        $this->pusher = new Pusher(
            config('chatify.pusher.key'),
            config('chatify.pusher.secret'),
            config('chatify.pusher.app_id'),
            config('chatify.pusher.options'),
        );
    }
    /**
     * This method returns the allowed image extensions
     * to attach with the message.
     *
     * @return array
     */
    public function getAllowedImages(){
        return config('chatify.attachments.allowed_images');
    }

    /**
     * This method returns the allowed file extensions
     * to attach with the message.
     *
     * @return array
     */
    public function getAllowedFiles(){
        return config('chatify.attachments.allowed_files');
    }

    /**
     * Returns an array contains messenger's colors
     *
     * @return array
     */
    public function getMessengerColors(){
        return config('chatify.colors');
    }

    /**
     * Trigger an event using Pusher
     *
     * @param string $channel
     * @param string $event
     * @param array $data
     * @return void
     */
    public function push($channel, $event, $data)
    {
        return $this->pusher->trigger($channel, $event, $data);
    }

    /**
     * Authintication for pusher
     *
     * @param string $channelName
     * @param string $socket_id
     * @param array $data
     * @return void
     */
    public function pusherAuth($channelName, $socket_id, $data = null){
        return $this->pusher->socket_auth($channelName, $socket_id, $data);
    }

    /**
     * Fetch message by id and return the message card
     * view as a response.
     *
     * @param int $id
     * @return array
     */
    public function fetchMessage($id){
        $attachment = null;
        $attachment_type = null;
        $attachment_title = null;

        $msg = Message::where('id',$id)->first();

        if(isset($msg->attachment)){
            $attachmentOBJ = json_decode($msg->attachment);
            $attachment = $attachmentOBJ->new_name;
            $attachment_title = htmlentities(trim($attachmentOBJ->old_name), ENT_QUOTES, 'UTF-8');

            $ext = pathinfo($attachment, PATHINFO_EXTENSION);
            $attachment_type = in_array($ext,$this->getAllowedImages()) ? 'image' : 'file';
        }

        return [
            'id' => $msg->id,
            'from_id' => $msg->from_id,
            'to_id' => $msg->to_id,
            'message' => $msg->body,
            'attachment' => [$attachment, $attachment_title, $attachment_type],
            'time' => $msg->created_at->diffForHumans(),
            'fullTime' => $msg->created_at,
            'viewType' => ($msg->from_id == Auth::user()->id) ? 'sender' : 'default',
            'seen' => $msg->seen,
        ];
    }

    /**
     * Return a message card with the given data.
     *
     * @param array $data
     * @param string $viewType
     * @return void
     */
    public function messageCard($data, $viewType = null){
        $data['viewType'] = ($viewType) ? $viewType : $data['viewType'];
        return view('Chatify::layouts.messageCard',$data)->render();
    }

    /**
     * Default fetch messages query between a Sender and Receiver.
     *
     * @param int $user_id
     * @return Collection
     */
    public function fetchMessagesQuery($user_id){
        return Message::where('from_id',Auth::user()->id)->where('to_id',$user_id)
                    ->orWhere('from_id',$user_id)->where('to_id',Auth::user()->id);
    }

    /**
     * create a new message to database
     *
     * @param array $data
     * @return void
     */
    public function newMessage($data){
        $message = new Message();
        $message->id = $data['id'];
        $message->type = $data['type'];
        $message->from_id = $data['from_id'];
        $message->to_id = $data['to_id'];
        $message->body = $data['body'];
        $message->attachment = $data['attachment'];
        $message->save();
    }

    /**
     * Make messages between the sender [Auth user] and
     * the receiver [User id] as seen.
     *
     * @param int $user_id
     * @return bool
     */
    public function makeSeen($user_id){
        Message::Where('from_id',$user_id)
                ->where('to_id',Auth::user()->id)
                ->where('seen',0)
                ->update(['seen' => 1]);
        return 1;
    }

    /**
     * Get last message for a specific user
     *
     * @param int $user_id
     * @return Collection
     */
    public function getLastMessageQuery($user_id){
        return $this->fetchMessagesQuery($user_id)->latest()->first();
    }

    /**
     * Count Unseen messages
     *
     * @param int $user_id
     * @return Collection
     */
    public function countUnseenMessages($user_id){
        return Message::where('from_id',$user_id)->where('to_id',Auth::user()->id)->where('seen',0)->count();
    }

    /**
     * Get user list's item data [Contact Itme]
     * (e.g. User data, Last message, Unseen Counter...)
     *
     * @param int $messenger_id
     * @param Collection $user
     * @return void
     */
    public function getContactItem($user){
        // get last message
        $lastMessage = $this->getLastMessageQuery($user->id);

        // Get Unseen messages counter
        $unseenCounter = $this->countUnseenMessages($user->id);

        return view('Chatify::layouts.listItem', [
            'get' => 'users',
            'user' => $user,
            'lastMessage' => $lastMessage,
            'unseenCounter' => $unseenCounter,
        ])->render();
    }

    /**
     * Check if a user in the favorite list
     *
     * @param int $user_id
     * @return boolean
     */
    public function inFavorite($user_id){
        return Favorite::where('user_id', Auth::user()->id)
                        ->where('favorite_id', $user_id)->count() > 0
                        ? true : false;

    }

    /**
     * Make user in favorite list
     *
     * @param int $user_id
     * @param int $star
     * @return boolean
     */
    public function makeInFavorite($user_id, $action){
        if ($action > 0) {
            // Star
            $star = new Favorite();
            $star->id = rand(9,99999999);
            $star->user_id = Auth::user()->id;
            $star->favorite_id = $user_id;
            $star->save();
            return $star ? true : false;
        }else{
            // UnStar
            $star = Favorite::where('user_id',Auth::user()->id)->where('favorite_id',$user_id)->delete();
            return $star ? true : false;
        }
    }

    /**
     * Get shared photos of the conversation
     *
     * @param int $user_id
     * @return array
     */
    public function getSharedPhotos($user_id){
        $images = array(); // Default
        // Get messages
        $msgs = $this->fetchMessagesQuery($user_id)->orderBy('created_at','DESC');
        if($msgs->count() > 0){
            foreach ($msgs->get() as $msg) {
                // If message has attachment
                if($msg->attachment){
                    $attachment = json_decode($msg->attachment);
                    // determine the type of the attachment
                    in_array(pathinfo($attachment->new_name, PATHINFO_EXTENSION), $this->getAllowedImages())
                    ? array_push($images, $attachment->new_name) : '';
                }
            }
        }
        return $images;

    }

    /**
     * Delete Conversation
     *
     * @param int $user_id
     * @return boolean
     */
    public function deleteConversation($user_id){
        try {
            foreach ($this->fetchMessagesQuery($user_id)->get() as $msg) {
                // delete file attached if exist
                if (isset($msg->attachment)) {
                    $path = storage_path('app/public/'.config('chatify.attachments.folder').'/'.json_decode( $msg->attachment)->new_name);
                    if(File::exists($path)){
                        File::delete($path);
                    }
                }
                // delete from database
                $msg->delete();
            }
            return 1;
        }catch(Exception $e) {
            return 0;
        }
    }

}