<?php

namespace App\Jobs;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use App\Model\AbTest;
use App\Model\AbTestVariant;
use App\Model\TrackingLog;
use App\Model\OpenLog;
use App\Model\ClickLog;
class EvaluateAbTestWinner implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    public $timeout = 120;
    public $tries   = 1;

    public function __construct(protected int $abTestId) {}

    public function handle(): void
    {
        $abTest = AbTest::with(['variants.email', 'campaign'])->find($this->abTestId);

        if (!$abTest || !$abTest->isAwaitingWinner()) {
            return;
        }

        if ($abTest->winner_criteria === AbTest::CRITERIA_MANUAL) {
            return; // Human picks winner via UI
        }

        $winner = $this->pickWinner($abTest);

        if (!$winner) {
            return;
        }

        $abTest->declareWinner($winner);
    }

    private function pickWinner(AbTest $abTest): ?AbTestVariant
    {
        $campaignId = $abTest->campaign_id;

        return $abTest->variants
            ->map(function (AbTestVariant $variant) use ($campaignId, $abTest) {
                $sentIds = TrackingLog::where('campaign_id', $campaignId)
                    ->where('ab_test_variant_id', $variant->id)
                    ->where('status', TrackingLog::STATUS_SENT)
                    ->pluck('message_id');

                $sent = $sentIds->count();

                if ($sent === 0) {
                    $variant->_rate = 0.0;
                    return $variant;
                }

                if ($abTest->winner_criteria === AbTest::CRITERIA_OPEN_RATE) {
                    $unique = OpenLog::whereIn('message_id', $sentIds)
                        ->distinct('message_id')
                        ->count('message_id');
                } else {
                    $unique = ClickLog::whereIn('message_id', $sentIds)
                        ->distinct('message_id')
                        ->count('message_id');
                }

                $variant->_rate = $unique / $sent;
                return $variant;
            })
            ->sortByDesc('_rate')
            ->first();
    }

}