/home/brandsfa/www/app/Http/Controllers/RestAPI/v3/seller/ChatController.php
<?php

namespace App\Http\Controllers\RestAPI\v3\seller;

use App\Events\ChattingEvent;
use App\Http\Controllers\Controller;
use App\Models\Chatting;
use App\Models\DeliveryMan;
use App\Models\Seller;
use App\Models\Shop;
use App\User;
use App\Utils\Helpers;
use App\Utils\ImageManager;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;

class ChatController extends Controller
{

    public function list(Request $request, $type)
    {
        $seller = $request->seller;

        if ($type == 'customer') {
            $with_param = 'customer';
            $id_param = 'user_id';
        } elseif ($type == 'delivery-man') {
            $with_param = 'deliveryMan';
            $id_param = 'delivery_man_id';
        } else {
            return response()->json(['message' => translate('Invalid Chatting Type!')], 403);
        }

        $total_size = Chatting::where(['seller_id' => $seller['id']])
            ->whereNotNull($id_param)
            ->select($id_param)
            ->distinct()
            ->get()
            ->count();

        $all_chat_ids = Chatting::where(['seller_id' => $seller['id']])
            ->whereNotNull($id_param)
            ->select('id',$id_param)
            ->latest()
            ->get()
            ->unique($id_param)
            ->toArray();

        $unique_chat_ids = array_slice($all_chat_ids, $request->offset-1, $request->limit);

        $chats = array();
        if ($unique_chat_ids) {
            foreach ($unique_chat_ids as $unique_chat_id) {
                $user_chatting = Chatting::with([$with_param])
                    ->where(['seller_id' => $seller['id'], $id_param => $unique_chat_id[$id_param]])
                    ->whereNotNull($id_param)
                    ->latest()
                    ->first();

                $user_chatting->unseen_message_count = Chatting::where(['user_id'=>$user_chatting->user_id, $id_param=>$user_chatting->$id_param, 'seen_by_seller'=>'0'])->count();
                $chats[] = $user_chatting;
            }
        }

        $data = array(
            'data' => $seller,
            'total_size' => $total_size,
            'limit' => $request->limit,
            'offset' => $request->offset,
            'chat' => $chats,
        );

        return response()->json($data, 200);
    }

    public function search(Request $request, $type)
    {
        $seller = $request->seller;

        $terms = explode(" ", $request->input('search'));
        if ($type == 'customer') {
            $with_param = 'customer';
            $id_param = 'user_id';
            $users = User::where('id', '!=', 0)
                ->when($request->search, function ($query) use ($terms) {
                    foreach ($terms as $term) {
                        $query->where('f_name', 'like', '%' . $term . '%')
                            ->orWhere('l_name', 'like', '%' . $term . '%');
                    }
                })->pluck('id')->toArray();

        } elseif ($type == 'delivery-man') {
            $with_param = 'deliveryMan';
            $id_param = 'delivery_man_id';
            $users = DeliveryMan::where(['seller_id' => $seller['id']])
                ->when($request->search, function ($query) use ($terms) {
                    foreach ($terms as $term) {
                        $query->where('f_name', 'like', '%' . $term . '%')
                            ->orWhere('l_name', 'like', '%' . $term . '%');
                    }
                })->pluck('id')->toArray();
        } else {
            return response()->json(['message' => translate('Invalid Chatting Type!')], 403);
        }

        $unique_chat_ids = Chatting::where(['seller_id' => $seller['id']])
            ->whereIn($id_param, $users)
            ->select($id_param)
            ->distinct()
            ->get()
            ->toArray();
        $unique_chat_ids = call_user_func_array('array_merge', $unique_chat_ids);

        $chats = array();
        if ($unique_chat_ids) {
            foreach ($unique_chat_ids as $unique_chat_id) {
                $chats[] = Chatting::with([$with_param])
                    ->where(['seller_id' => $seller['id'], $id_param => $unique_chat_id])
                    ->whereNotNull($id_param)
                    ->latest()
                    ->first();
            }
        }

        return response()->json($chats, 200);
    }

    public function get_message(Request $request, $type, $id)
    {
        $seller = $request->seller;
        $validator = Validator::make($request->all(), [
            'offset' => 'required',
            'limit' => 'required',
        ]);
        if ($validator->fails()) {
            return response()->json(['errors' => Helpers::error_processor($validator)], 403);
        }

        if ($type == 'customer') {
            $id_param = 'user_id';
            $sent_by = 'sent_by_customer';
            $with = 'customer';
        } elseif ($type == 'delivery-man') {
            $id_param = 'delivery_man_id';
            $sent_by = 'sent_by_delivery_man';
            $with = 'deliveryMan';

        } else {
            return response()->json(['message' => translate('Invalid Chatting Type!')], 403);
        }

        $query = Chatting::with($with)->where(['seller_id' => $seller['id'], $id_param => $id])->latest();

        if (!empty($query->get())) {
            $message = $query->paginate($request->limit, ['*'], 'page', $request->offset);
            $message?->map(function ($conversation) {
                $conversation->attachment = $conversation->attachment ? json_decode($conversation->attachment) : [];
            });

            if ($query->where($sent_by, 1)->latest()->first()) {
                $query->where($sent_by, 1)->latest()->first()
                    ->update(['seen_by_seller' => 1]);
            }

            $data = array(
                'data' => $seller,
                'total_size' =>$message->total(),
                'limit' =>$request->limit,
                'offset' =>$request->offset,
                'message' =>$message->items(),
            );
            return response()->json($data, 200);
        }
        return response()->json(['message' => translate('no messages found!')], 200);

    }

    public function send_message(Request $request, $type)
    {
        $seller = $request->seller;

        $validator = Validator::make($request->all(), [
            'id' => 'required',
        ]);
        if ($validator->fails()) {
            return response()->json(['errors' => Helpers::error_processor($validator)], 403);
        }

        $image = [] ;
        if ($request->file('image')) {
            foreach ($request->image as $key=>$value) {
                $image_name = ImageManager::upload('chatting/', 'webp', $value);
                $image[] = $image_name;
            }
        }

        $shop_id = Shop::where('seller_id', $seller['id'])->first()->id;
        $message_form = Seller::find($seller['id']);

        $chatting = new Chatting();
        $chatting->seller_id = $seller->id;
        $chatting->message = $request->message;
        $chatting->attachment = json_encode($image);
        $chatting->sent_by_seller = 1;
        $chatting->seen_by_seller = 1;
        $chatting->shop_id = $shop_id;

        if ($type == 'delivery-man') {
            $chatting->delivery_man_id = $request->id;
            $chatting->seen_by_delivery_man = 0;

            $delivery_man = DeliveryMan::find($request->id);
            ChattingEvent::dispatch('message_from_seller', 'delivery_man', $delivery_man, $message_form);
        } elseif ($type == 'customer') {
            $chatting->user_id = $request->id;
            $chatting->seen_by_customer = 0;

            $customer = User::find($request->id);
            ChattingEvent::dispatch('message_from_customer', 'customer', $customer, $message_form);
        } else {
            return response()->json(translate('Invalid Chatting Type!'), 403);
        }

        if ($chatting->save()) {
            return response()->json(['message' => $request->message, 'time' => now(), 'image' => $image], 200);
        } else {
            return response()->json(['message' => translate('Message sending failed')], 403);
        }
    }
}