<?php

namespace App\Actions\Interview;

use App\Mail\InterviewReminderMail;
use App\Models\Interview;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Mail;

class SendUpcomingInterviewRemindersAction
{
    /**
     * Scan and dispatch 15-minute advance email reminders to candidates and panelists.
     *
     * @return int Count of reminded interview sessions
     */
    public function execute(int $windowMinutes = 20): int
    {
        $now = now();
        $targetWindow = $now->copy()->addMinutes($windowMinutes);

        $interviews = Interview::where('status', 'scheduled')
            ->whereNull('reminder_sent_at')
            ->whereNotNull('scheduled_at')
            ->where('scheduled_at', '>=', $now->subMinutes(5)) // Within 5m grace
            ->where('scheduled_at', '<=', $targetWindow)
            ->get();

        $processedCount = 0;

        foreach ($interviews as $interview) {
            // 1. Candidate reminder email
            if (! empty($interview->candidate_email)) {
                try {
                    Mail::to($interview->candidate_email)
                        ->queue(new InterviewReminderMail($interview, 'candidate', $interview->candidate_name));
                } catch (\Throwable $e) {
                    Log::error('Failed to send 15m reminder to candidate: '.$e->getMessage(), [
                        'interview_id' => $interview->id,
                    ]);
                }
            }

            // 2. Panelists reminder emails
            $assignedUsers = $interview->assignedUsers();
            foreach ($assignedUsers as $interviewer) {
                if (! empty($interviewer->email)) {
                    try {
                        Mail::to($interviewer->email)
                            ->queue(new InterviewReminderMail($interview, 'interviewer', $interviewer->name));
                    } catch (\Throwable $e) {
                        Log::error('Failed to send 15m reminder to interviewer: '.$e->getMessage(), [
                            'interview_id' => $interview->id,
                            'interviewer_id' => $interviewer->id,
                        ]);
                    }
                }
            }

            $interview->update(['reminder_sent_at' => now()]);
            $processedCount++;
        }

        return $processedCount;
    }
}