<?php

namespace App\Livewire\Ui\Nx\Mail;

use Livewire\Attributes\Layout;
use Livewire\Attributes\On;
use Livewire\Attributes\Title;
use Livewire\Attributes\Url;
use Livewire\Component;

#[Layout('layouts.dvx')]
#[Title('Mail-Queue · Mailwolt')]
class QueueList extends Component
{
    #[Url(as: 'filter', keep: true)]
    public string $filter = 'all';

    #[Url(as: 'q', keep: true)]
    public string $search = '';

    public array  $selected = [];
    public bool   $selectAll = false;

    #[On('queue:updated')]
    public function refresh(): void {}

    public function updatedSelectAll(bool $val): void
    {
        $messages = $this->fetchQueue();
        $this->selected = $val ? array_column($messages, 'id') : [];
    }

    public function flush(): void
    {
        @shell_exec('sudo postqueue -f >/dev/null 2>&1 &');
        $this->dispatch('toast', type: 'info', title: 'Queue-Flush gestartet');
    }

    public function deleteSelected(): void
    {
        $count = count($this->selected);
        foreach ($this->selected as $id) {
            @shell_exec('sudo postsuper -d ' . escapeshellarg($id) . ' 2>&1');
        }
        $this->selected  = [];
        $this->selectAll = false;
        $this->dispatch('toast', type: 'success', title: "{$count} Nachricht(en) gelöscht");
    }

    public function deleteAll(): void
    {
        @shell_exec('sudo postsuper -d ALL 2>&1');
        $this->selected  = [];
        $this->selectAll = false;
        $this->dispatch('toast', type: 'warning', title: 'Alle Queue-Nachrichten gelöscht');
    }

    public function openMessage(string $queueId): void
    {
        $this->dispatch('openModal',
            component: 'ui.nx.mail.modal.queue-message-modal',
            arguments: ['queueId' => $queueId]
        );
    }

    public function render()
    {
        $all = $this->fetchQueue();

        $counts = [
            'all'      => count($all),
            'active'   => count(array_filter($all, fn($m) => $m['queue'] === 'active')),
            'deferred' => count(array_filter($all, fn($m) => $m['queue'] === 'deferred')),
            'hold'     => count(array_filter($all, fn($m) => $m['queue'] === 'hold')),
        ];

        $messages = $all;

        if ($this->filter !== 'all') {
            $messages = array_values(array_filter($messages, fn($m) => $m['queue'] === $this->filter));
        }

        if ($this->search !== '') {
            $s        = strtolower($this->search);
            $messages = array_values(array_filter($messages, fn($m) =>
                str_contains(strtolower($m['sender'] ?? ''), $s) ||
                str_contains(strtolower($m['recipient'] ?? ''), $s) ||
                str_contains(strtolower($m['id'] ?? ''), $s)
            ));
        }

        return view('livewire.ui.nx.mail.queue-list', compact('messages', 'counts'));
    }

    // ── helpers ──────────────────────────────────────────────────────────────

    public function fetchQueue(): array
    {
        $out = trim(@shell_exec('postqueue -j 2>/dev/null') ?? '');
        if ($out !== '') {
            return $this->parseJson($out);
        }
        return $this->parseText(trim(@shell_exec('postqueue -p 2>/dev/null') ?? ''));
    }

    private function parseJson(string $out): array
    {
        $rows = [];
        foreach (explode("\n", $out) as $line) {
            $line = trim($line);
            if ($line === '') continue;
            $m = json_decode($line, true);
            if (!is_array($m)) continue;

            $recipients = $m['recipients'] ?? [];
            $rcptList   = array_column($recipients, 'address');
            $reason     = $recipients[0]['delay_reason'] ?? '';

            $rows[] = [
                'id'        => $m['queue_id'] ?? '',
                'queue'     => $m['queue_name'] ?? 'deferred',
                'sender'    => $m['sender'] ?? '',
                'recipient' => implode(', ', $rcptList),
                'size'      => (int)($m['message_size'] ?? 0),
                'arrival'   => (int)($m['arrival_time'] ?? 0),
                'reason'    => $this->trimReason($reason),
            ];
        }
        return $rows;
    }

    private function parseText(string $out): array
    {
        $rows    = [];
        $current = null;

        foreach (explode("\n", $out) as $line) {
            if (preg_match('/^([A-F0-9]{9,})\*?\s+(\d+)\s+\S+\s+\S+\s+\d+\s+\d{1,2}:\d{2}:\d{2}\s+(.*)/i', $line, $m)) {
                if ($current) $rows[] = $current;
                $current = [
                    'id'        => $m[1],
                    'queue'     => 'active',
                    'sender'    => trim($m[3]),
                    'recipient' => '',
                    'size'      => (int)$m[2],
                    'arrival'   => 0,
                    'reason'    => '',
                ];
            } elseif ($current && preg_match('/^\s+([\w.+%-]+@[\w.-]+)/', $line, $m)) {
                $current['recipient'] = $m[1];
            } elseif ($current && preg_match('/^\s+\((.+)\)/', $line, $m)) {
                $current['reason'] = $this->trimReason($m[1]);
                $current['queue']  = 'deferred';
            }
        }
        if ($current) $rows[] = $current;
        return $rows;
    }

    private function trimReason(string $r): string
    {
        $r = preg_replace('/^\d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}:\d{2}\s+/', '', trim($r));
        return mb_strlen($r) > 100 ? mb_substr($r, 0, 100) . '…' : $r;
    }
}