<?php
namespace App;

use Illuminate\Database\Eloquent\Model;
use Log, DB;

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

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

    private function unique_trimet_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)->whereNotNull('m1_transit_line_id')->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, $with_another_team=false) {
      static $cache = ['with'=>[], 'without'=>[]];
      if(array_key_exists($team->id, $cache[$with_another_team?'with':'without']))
        return $cache[$with_another_team?'with':'without'][$team->id];

      $query = Tweet::where('team_id', $team->id)->where('m2_complete', 1);
      if($with_another_team)
        $query = $query->where('m2_with_other_team', 1);
      $tweets = $query->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;
        }
      }

      $cache[$with_another_team?'with':'without'][$team->id] = count($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 trimet transit lines
          return $this->unique_trimet_transit_lines($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 [$this->unique_trimet_transit_lines($team), 5];
        case 2:
          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];
      }
      return [false,false];
    }

    public function score(Team $team) {
      switch($this->id) {
        case 1:
          // No points unless they hit 5 trimet transit lines
          if($this->complete($team)) {
            $score = 50;
            // 20 bonus for each line that is not trimet
            $tweets = Tweet::where('team_id', $team->id)->where('m1_complete', 1)->whereNotNull('m1_non_trimet')->get();
            $lines = [];
            foreach($tweets as $tweet) {
              if(!in_array($tweet->m1_non_trimet, $lines)) {
                $lines[] = $tweet->m1_non_trimet;
              }
            }
            $score += count($lines) * 20;
            return $score;
          } else {
            return 0;
          }
          break;
        case 2:
          // No points unless they hit 3 transit centers
          if($this->complete($team)) {
            $score = 50;
            // If they have more than 3 unique transit centers, 
            // then award bonus points for any beyond the third with another team
            $unique_transit_centers = $this->unique_transit_centers($team);
            if($unique_transit_centers > 3) {
              // Take the total number of transit centers and subtract 3
              $total_possible_bonus = $unique_transit_centers - 3;
              // Find the number of unique transit centers with another team
              $unique_with_another_team = $this->unique_transit_centers($team, true);
              // Use the smaller of the two numbers as the bonus
              $score += 20 * min($total_possible_bonus, $unique_with_another_team);
            }

            // Increasing bonus points for additional transit centers
            if($unique_transit_centers >= 4) {
              $score += 10;
            }
            if($unique_transit_centers >= 5) {
              $score += 20;
            }
            if($unique_transit_centers >= 6) {
              $score += 30;
            }
            if($unique_transit_centers >= 7) {
              $score += (50 * ($unique_transit_centers - 6));
            }

            // Triple points for each transit center that no other team goes to
            $this_team_tcs = Tweet::where('team_id', $team->id)->where('m2_complete', 1)
              ->distinct()->pluck('m2_transit_center_id')->toArray();
            $other_visited_tcs = Tweet::where('team_id', '!=', $team->id)->where('m2_complete', 1)
              ->distinct()->pluck('m2_transit_center_id')->toArray();
            $distinct_tcs = array_diff($this_team_tcs, $other_visited_tcs);

            Log::info('Team '.$team->name.' visited '.count($distinct_tcs).' TCs that no other team visited, doubling their score');
            if(count($distinct_tcs) > 0) {
              $score *= 2;
            }

            return $score;
          } else {
            return 0;
          }
          break;
        case 3:
        case 4:
        case 6:
          if($this->complete($team)) {
            return 50;
          } else {
            return 0;
          }
        case 5:
          if($this->complete($team)) {
            $score = 50;

            return $score;
          } else {
            return 0;
          }
        case 7:
          if($this->complete($team)) {
            $score = 50;
            // +5 for each additional photo
            $extra_docs = $this->unique_documents($team) - 3;
            if($extra_docs > 0) {
              $score += $extra_docs * 5;
            }
            return $score;
          } else {
            return 0;
          }
      }
    }
}