<?php
namespace App;

use Illuminate\Database\Eloquent\Model;

class Mission extends Model
{
    protected $fillable = [
      'hashtag',
    ];

    public function tweets() {
      return $this->hasMany('App\Tweet');
    }

    private function unique_transit_lines(Team $team) {
      static $cache = [];
      if(array_key_exists($team->id, $cache))
        return $cache[$team->id];

      $tweets = Tweet::where('team_id', $team->id)->where('m1_complete', 1)->get();
      $lines = [];
      foreach($tweets as $tweet) {
        if($tweet->m1_transit_line_id && !in_array($tweet->m1_transit_line_id, $lines)) {
          $lines[] = $tweet->m1_transit_line_id;
        }
      }

      $cache[$team->id] = count($lines);
      return count($lines);
    }

    private function unique_transit_centers(Team $team) {
      static $cache = [];
      if(array_key_exists($team->id, $cache))
        return $cache[$team->id];

      $tweets = Tweet::where('team_id', $team->id)->where('m2_complete', 1)->get();
      $centers = [];
      foreach($tweets as $tweet) {
        if($tweet->m2_transit_center_id && !in_array($tweet->m2_transit_center_id, $centers)) {
          $centers[] = $tweet->m2_transit_center_id;
        }
      }

      $cache[$team->id] = count($centers);
      return count($centers);
    }

    private function unique_documents(Team $team) {
      static $cache = [];
      if(array_key_exists($team->id, $cache))
        return $cache[$team->id];

      $tweets = Tweet::where('team_id', $team->id)->whereNotNull('m7_document_id')->get();
      $documents = [];
      foreach($tweets as $tweet) {
        if($tweet->m7_document_id && !in_array($tweet->m7_document_id, $documents)) {
          $documents[] = $tweet->m7_document_id;
        }
      }

      $cache[$team->id] = count($documents);
      return count($documents);
    }

    private function num_tweets_for_mission(Team $team, $m) {
      static $cache = [3=>[], 4=>[], 5=>[], 6=>[]];
      if(array_key_exists($team->id, $cache[$m]))
        return $cache[$m][$team->id];

      $num = Tweet::where('team_id', $team->id)->where('m'.$m.'_complete', 1)->count();
      $cache[$m][$team->id] = $num;
      return $num;
    }

    public function complete(Team $team) {
      switch($this->id) {
        case 1:
          // 5 unique transit lines
          return $this->unique_transit_lines($team) >= 5;
        case 2:
          // 3 unique transit centers
          return $this->unique_transit_centers($team) >= 3;
        case 3:
        case 4:
        case 5:
        case 6:
          return $this->num_tweets_for_mission($team, $this->id) >= 1;
        case 7:
          return $this->unique_documents($team) >= 3;
      }
    }

    public function progress(Team $team) {
      switch($this->id) {
        case 1:
          return [$this->unique_transit_lines($team), 5];
        case 2:
          return [$this->unique_transit_lines($team), 3];
        case 3:
        case 4:
        case 5:
        case 6:
          return [$this->num_tweets_for_mission($team, $this->id), 1];
        case 7:
          return [$this->unique_documents($team), 3];
      }
      return [false,false];
    }

    public function score(Team $team) {
      switch($this->id) {
        case 1:


          break;
        case 2:


          break;
      }
    }
}