<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: Sebastian Krupinski <krupinski01@gmail.com>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace KTXM\ProviderImapMail\Console;

use KTXM\ProviderImapMail\Providers\Provider;
use KTXM\ProviderImapMail\Providers\Service;
use KTXM\ProviderImapMail\Service\Remote\RemoteService;
use KTXC\SessionTenant;
use Symfony\Component\Console\Attribute\AsCommand;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;

/**
 * Live IMAP connection test.
 *
 * Connects to the server using a stored service's credentials, authenticates,
 * and lists the root-level mailboxes with their unread message counts as a
 * quick end-to-end sanity check.
 *
 * Usage:
 *   bin/console provider_imap_mail:service:test <service-id> --tenant=t1 --user=u1
 */
#[AsCommand(
    name: 'provider_imap_mail:service:test',
    description: 'Test an IMAP service connection and list root mailboxes',
)]
class ServiceTestCommand extends Command
{
    public function __construct(
        private readonly Provider      $provider,
        private readonly SessionTenant $sessionTenant,
    ) {
        parent::__construct();
    }

    protected function configure(): void
    {
        $this
            ->addArgument('service-id', InputArgument::OPTIONAL, 'Service ID to test')
            ->addOption('tenant', 't', InputOption::VALUE_REQUIRED, 'Tenant ID')
            ->addOption('user',   'u', InputOption::VALUE_REQUIRED, 'User ID')
            ->addOption('all',    'a', InputOption::VALUE_NONE,    'List all mailboxes, not just the root level')
            ->setHelp(<<<'HELP'
                The <info>provider_imap_mail:service:test</info> command opens a live IMAP
                connection for a stored service, authenticates, and lists the available
                mailboxes together with their message counts.

                Examples:

                  Test a specific service:
                    <info>bin/console provider_imap_mail:service:test abc123 --tenant=t1 --user=u1</info>

                  Interactive (lists services, lets you choose one):
                    <info>bin/console provider_imap_mail:service:test --tenant=t1 --user=u1</info>

                  Show all mailboxes (not just top-level):
                    <info>bin/console provider_imap_mail:service:test abc123 --tenant=t1 --user=u1 --all</info>
                HELP);
    }

    protected function interact(InputInterface $input, OutputInterface $output): void
    {
        $io = new SymfonyStyle($input, $output);

        if (!$input->getOption('tenant')) {
            $tenant = $io->ask('Tenant ID');
            if ($tenant) $input->setOption('tenant', $tenant);
        }

        if (!$input->getOption('user')) {
            $user = $io->ask('User ID');
            if ($user) $input->setOption('user', $user);
        }

        if (!$input->getArgument('service-id')) {
            $tenantId = (string) ($input->getOption('tenant') ?? '');
            $userId   = (string) ($input->getOption('user') ?? '');

            if ($tenantId !== '' && $userId !== '') {
                $this->sessionTenant->configureById($tenantId);
                $services = $this->provider->serviceList($tenantId, $userId);

                if (!empty($services)) {
                    $choices = [];
                    foreach ($services as $id => $service) {
                        $label = $service instanceof Service ? ($service->getLabel() ?? $id) : $id;
                        $choices[$id] = "{$label}  [{$id}]";
                    }

                    $chosen    = $io->choice('Select service to test', array_values($choices));
                    $serviceId = (string) array_search($chosen, $choices, true);
                    if ($serviceId !== '') {
                        $input->setArgument('service-id', $serviceId);
                    }
                }
            }
        }
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $io = new SymfonyStyle($input, $output);

        $tenantId  = (string) ($input->getOption('tenant') ?? '');
        $userId    = (string) ($input->getOption('user') ?? '');
        $serviceId = (string) ($input->getArgument('service-id') ?? '');
        $showAll   = (bool)   $input->getOption('all');

        $errors = [];
        if ($tenantId === '')  $errors[] = 'Tenant ID is required (--tenant).';
        if ($userId === '')    $errors[] = 'User ID is required (--user).';
        if ($serviceId === '') $errors[] = 'Service ID is required.';

        if (!empty($errors)) {
            $io->error($errors);
            return Command::FAILURE;
        }

        // ── Fetch stored service ─────────────────────────────────────────────

        $this->sessionTenant->configureById($tenantId);

        $service = $this->provider->serviceFetch($tenantId, $userId, $serviceId);

        if (!($service instanceof Service)) {
            $io->error("Service '{$serviceId}' not found.");
            return Command::FAILURE;
        }

        $host = $service->getLocation()?->getHost() ?? 'unknown';
        $port = $service->getLocation()?->getPort() ?? 993;
        $enc  = $service->getLocation()?->getEncryption() ?? 'ssl';

        $io->title('IMAP Connection Test');
        $io->definitionList(
            ['Service'    => $service->getLabel() ?? $serviceId],
            ['Host'       => $host],
            ['Port'       => (string) $port],
            ['Encryption' => $enc],
            ['Username'   => $service->getIdentity()?->getIdentity() ?? '–'],
        );

        // ── Quick single-call test via Provider ──────────────────────────────

        $io->text('Authenticating…');
        $startTime = microtime(true);
        $testResult = $this->provider->serviceTest($service);
        $latency = (int) round((microtime(true) - $startTime) * 1000);

        if (!$testResult['success']) {
            $io->error($testResult['message']);
            return Command::FAILURE;
        }

        $io->success($testResult['message']);

        // ── Mailbox listing ──────────────────────────────────────────────────

        $io->text('Fetching mailbox list…');

        try {
            $wrapper  = RemoteService::freshClient($service);
            $mailboxes = $wrapper->mailboxes();

            $rows = [];
            foreach ($mailboxes as $mailbox) {
                // Filter to root-level only unless --all
                if (!$showAll && substr_count($mailbox->name, $mailbox->hierarchyDelimiter ?: '/') > 0) {
                    continue;
                }

                $selectable = $mailbox->isSelectable() ? '<fg=green>✓</>' : '<fg=yellow>–</>';
                $rows[]     = [
                    $mailbox->name,
                    $selectable,
                ];
            }

            if (empty($rows)) {
                $io->note('No mailboxes found' . ($showAll ? '.' : ' at the root level. Use --all to see all mailboxes.'));
            } else {
                $io->table(['Mailbox', 'Selectable'], $rows);
                $noun = count($rows) === 1 ? 'mailbox' : 'mailboxes';
                $io->text(sprintf('<info>%d</info> %s listed. Latency: <comment>%d ms</comment>.', count($rows), $noun, $latency));
            }
        } catch (\Throwable $e) {
            $io->warning('Could not list mailboxes: ' . $e->getMessage());
        }

        return Command::SUCCESS;
    }
}