<?php
  
  namespace App\Models;
  
  use Illuminate\Database\Eloquent\Factories\HasFactory;
  use Illuminate\Database\Eloquent\Model;

  use Carbon\Carbon;

  
  class Chat extends Model
  {
      use HasFactory;
  
      protected $fillable = [
          'user_id',
          'to_user_id',
          'is_removed',
          'is_fixed',
          'last_message_date',
          'last_message_id',

          'fixed_time',
          'is_admin_chat'

      ];
  
      public function user() {
          return $this->belongsTo(User::class, 'to_user_id');
      }
  
      public function worker() {
          return $this->belongsTo(Worker::class, 'to_user_id', 'user_id');
      }
  
      public function employer() {
          return $this->belongsTo(Employer::class, 'to_user_id', 'user_id');
      }
  
      public function last_message() {
          return $this->belongsTo(Message::class, 'last_message_id');
      }

      public function unread_messages()
      {
          return $this->hasMany(Message::class, 'user_id', 'to_user_id');
      }

      public function admin_chat_unread_messages()
      {
          return $this->hasMany(Message::class, 'to_user_id', 'to_user_id');
      }

      public static function pin_chat(int $chat_id, $fixed)
      {

          $chat = self::query()->find($chat_id);
          $chat->update([

                  'is_fixed' => !empty($fixed) ? 1 : 0,
                  'fixation_date' => !empty($fixed) ? Carbon::now() : null
              ]);

          return $chat;

      }
  
      public static function remove_chat(int $chat_id)
      {
          return self::where('id', '=', $chat_id)
              ->update(['is_removed' => 1]);
      }
  
      public static function get_user_chats(int $user_id){
          return Chat::query()

              ->with(['user', 'worker', 'employer', 'last_message'])

              ->withCount(['unread_messages' => function ($query) use($user_id) {

                  $query
                      ->where('to_user_id', '=', $user_id)
                      ->whereNotNull('chat_id_from')
                      ->where('flag_new', '=', 1)
                  ;

              }])

              ->whereHas('user')

              ->where('user_id', '=', $user_id)
              ->where('is_removed', '=', 0)
              ->orderByDesc('is_fixed')
              ->orderByDesc('fixation_date')
              ->orderByDesc('last_message_date')
              ->paginate(5)
          ;
      }

      public static function get_user_admin_chat(int $user_id)
      {
          return Chat::query()
              ->with('last_message')

              ->withCount(['unread_messages' => function ($query) use($user_id) {
                  $query->where('to_user_id', '=', $user_id)->where('flag_new', '=', 1);

              }])

              ->where('user_id', '=', $user_id)

              ->where('is_admin_chat', 1)
              ->first()
              ;
      }
  
      public static function get_chat_messages(Chat $chat){

              return Message::query()
                  ->where(function ($query) use ($chat) {
                      $query->where('chat_id_from', $chat->id)->orWhere('chat_id_to', $chat->id);
                  })
                  ->where(function($query) use ($chat) {
                      $query
                          ->where(function($query) use ($chat) {
                              $query->where('user_id', $chat->user_id)->where('to_user_id', $chat->to_user_id);
                          })
                          ->orWhere(function($query) use ($chat) {
                              $query->where('user_id', $chat->to_user_id)->where('to_user_id', $chat->user_id);
                          })
                      ;
                  })
                  ->OrderBy('created_at')
                  ->get()
              ;

      }

  }