<?php

namespace App\Services;

use App\Models\Audition;
use Illuminate\Support\Facades\DB;

class DrawService
{
    /**
     * Create a new class instance.
     */
    public function __construct()
    {
        //
    }

    public function runOneDraw(Audition $audition): void
    {
        // set draw number null on each entry before beginning
        DB::table('entries')->where('audition_id', $audition->id)->update(['draw_number' => null]);

        $randomizedEntries = $audition->entries->shuffle();

        // Move entries flagged as no show to the end
        [$noShowEntries, $otherEntries] = $randomizedEntries->partition(function ($entry) {
            return $entry->hasFlag('no_show');
        });

        // Merge the entries, placing the 'no_show' entries at the end
        $randomizedEntries = $otherEntries->merge($noShowEntries);

        foreach ($randomizedEntries as $index => $entry) {
            $entry->draw_number = $index + 1;
            $entry->save();
        }
        $audition->addFlag('drawn');
    }

    public function runDrawsOnCollection($auditions): void
    {
        $auditions->each(fn ($audition) => $this->runOneDraw($audition));
    }

    public function checkCollectionForDrawnAuditions($auditions): bool
    {

        $auditions->loadMissing('flags');

        return $auditions->contains(fn ($audition) => $audition->hasFlag('drawn'));
    }

    public function clearDrawForAudition(Audition $audition): void
    {
        $audition->removeFlag('drawn');
        DB::table('entries')->where('audition_id', $audition->id)->update(['draw_number' => null]);
    }

    public function clearDrawsOnCollection($auditions): void
    {
        $auditions->each(fn ($audition) => $this->clearDrawForAudition($audition));
    }
}