<?php

namespace App\Message;

use App\Model\TeamerMailingRecipientsDto;

/**
 * One composed mailing, on its way to the recipients the admin confirmed.
 *
 * The recipients travel as a snapshot of plain scalars rather than as a filter to run
 * later: re-running the filter in the worker could reach a different set of people than
 * the one the confirmation modal showed, and the filter itself carries hydrated entities
 * that have no business being serialized into a queue row. Plain arrays also survive a
 * deploy that changes TeamerMailingRecipient while messages are still queued.
 */
class SendTeamerMailing
{
    /**
     * @param array<int, array{email: string, firstName: string, lastName: string, fullName: string}> $recipients
     */
    public function __construct(
        private readonly string $subject,
        private readonly string $message,
        private readonly array $recipients,
    ) {
    }

    public static function fromRecipients(string $subject, string $message, TeamerMailingRecipientsDto $recipients): self
    {
        $snapshot = [];

        foreach ($recipients->getEligible() as $recipient) {
            // resolveRecipients() already guaranteed the address, this only narrows the type
            if (null === $email = $recipient->getEmail()) {
                continue;
            }

            $snapshot[] = [
                'email' => $email,
                'firstName' => $recipient->getFirstName(),
                'lastName' => $recipient->getLastName(),
                'fullName' => $recipient->getFullName(),
            ];
        }

        return new self($subject, $message, $snapshot);
    }

    public function getSubject(): string
    {
        return $this->subject;
    }

    public function getMessage(): string
    {
        return $this->message;
    }

    /**
     * @return array<int, array{email: string, firstName: string, lastName: string, fullName: string}>
     */
    public function getRecipients(): array
    {
        return $this->recipients;
    }

    public function getRecipientCount(): int
    {
        return count($this->recipients);
    }
}