<?php

namespace App\Livewire\Admin;

use App\Models\Mailbox;
use App\Services\Mail\MailPurpose;
use App\Services\Secrets\SecretCipher;
use App\Support\Settings;
use Livewire\Attributes\Layout;
use Livewire\Component;

/**
 * The sending addresses, and which kind of mail leaves from which.
 *
 * The server sits at the top because there is one of it; the mailboxes are a
 * list because there are several; the mapping is last because it only makes
 * sense once both exist.
 *
 * The test-send button is a later task's job. This page only shows and edits
 * what already exists — a button that cannot actually test is a promise the
 * page does not keep (the same reasoning the secrets page already applies).
 */
#[Layout('layouts.admin')]
class Mail extends Component
{
    public string $host = '';

    public int|string $port = 587;

    public string $encryption = 'tls';

    /** @var array<string, string> purpose => mailbox key */
    public array $purposes = [];

    /**
     * Whether credentials can be stored at all on this installation.
     *
     * Public so the page can say it rather than throwing on the first password
     * a mailbox tries to decrypt — the same courtesy the secrets page already
     * extends. A missing SECRETS_KEY is a setup state, not an error.
     */
    public bool $usable = true;

    public function mount(): void
    {
        $this->authorize('mail.manage');

        $this->host = (string) Settings::get('mail.host', '');
        $this->port = (int) Settings::get('mail.port', 587);
        $this->encryption = (string) Settings::get('mail.encryption', 'tls');

        foreach (MailPurpose::ALL as $purpose) {
            $this->purposes[$purpose] = (string) Settings::get(MailPurpose::settingKey($purpose), '');
        }
    }

    public function saveServer(): void
    {
        $this->authorize('mail.manage');

        // Rules on the ACTION, not on the property: a #[Validate] attribute on
        // a Livewire property applies class-wide, and savePurposes() below
        // would drag these along.
        $this->validate([
            'host' => ['required', 'string', 'max:255'],
            'port' => ['required', 'integer', 'min:1', 'max:65535'],
            'encryption' => ['required', 'in:tls,ssl,none'],
        ]);

        Settings::set('mail.host', $this->host);
        Settings::set('mail.port', (int) $this->port);
        Settings::set('mail.encryption', $this->encryption);

        $this->dispatch('notify', message: __('mail_settings.server_saved'));
    }

    public function savePurposes(): void
    {
        $this->authorize('mail.manage');

        // system is the fallback, so it is the one that may not be empty —
        // there is nothing left to fall back to.
        $this->validate(
            ['purposes.system' => ['required', 'string']],
            ['purposes.system.required' => __('mail_settings.system_required')],
        );

        foreach (MailPurpose::ALL as $purpose) {
            Settings::set(MailPurpose::settingKey($purpose), $this->purposes[$purpose] ?? '');
        }

        $this->dispatch('notify', message: __('mail_settings.purposes_saved'));
    }

    public function render()
    {
        $this->usable = app(SecretCipher::class)->isUsable();

        return view('livewire.admin.mail', [
            'mailboxes' => Mailbox::query()->orderBy('key')->get(),
            'purposeList' => MailPurpose::ALL,
        ]);
    }
}