<?php

namespace App\Livewire\Setup;

use App\Models\Setting;
use App\Models\User;
use Illuminate\Support\Facades\Hash;
use Livewire\Attributes\Layout;
use Livewire\Attributes\Title;
use Livewire\Component;

#[Layout('layouts.setup')]
#[Title('Einrichtung · Mailwolt')]
class Wizard extends Component
{
    public int $step = 1;
    public int $totalSteps = 4;

    // Schritt 1 — System
    public string $instance_name = 'Mailwolt';
    public string $locale        = 'de';
    public string $timezone      = 'Europe/Berlin';

    // Schritt 2 — Domains
    public string $ui_domain      = '';
    public string $mail_domain    = '';
    public string $webmail_domain = '';

    // Schritt 3 — Admin-Account
    public string $admin_name                  = '';
    public string $admin_email                 = '';
    public string $admin_password              = '';
    public string $admin_password_confirmation = '';

    public function mount(): void
    {
        $this->instance_name = config('app.name', 'Mailwolt');
        $this->timezone      = Setting::get('timezone', 'Europe/Berlin');
        $this->locale        = Setting::get('locale', 'de');
        $this->ui_domain     = Setting::get('ui_domain', '');
        $this->mail_domain   = Setting::get('mail_domain', '');
        $this->webmail_domain = Setting::get('webmail_domain', '');
    }

    public function next(): void
    {
        match ($this->step) {
            1 => $this->validate([
                'instance_name' => 'required|string|min:2|max:64',
                'locale'        => 'required|in:de,en,fr',
                'timezone'      => 'required|timezone',
            ]),
            2 => $this->validate([
                'ui_domain'      => ['required', 'regex:/^(?!https?:\/\/)(?:[a-zA-Z0-9](?:[a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$/'],
                'mail_domain'    => ['required', 'regex:/^(?!https?:\/\/)(?:[a-zA-Z0-9](?:[a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$/'],
                'webmail_domain' => ['required', 'regex:/^(?!https?:\/\/)(?:[a-zA-Z0-9](?:[a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$/'],
            ], [
                'ui_domain.required'      => 'Pflichtfeld.',
                'mail_domain.required'    => 'Pflichtfeld.',
                'webmail_domain.required' => 'Pflichtfeld.',
                'ui_domain.regex'         => 'Ungültige Domain — kein Schema (http://) erlaubt.',
                'mail_domain.regex'       => 'Ungültige Domain — kein Schema (http://) erlaubt.',
                'webmail_domain.regex'    => 'Ungültige Domain — kein Schema (http://) erlaubt.',
            ]),
            3 => $this->validate([
                'admin_name'                  => 'required|string|min:2|max:64',
                'admin_email'                 => 'required|email|max:190',
                'admin_password'              => 'required|string|min:10|same:admin_password_confirmation',
                'admin_password_confirmation' => 'required',
            ], [
                'admin_password.min'  => 'Mindestens 10 Zeichen.',
                'admin_password.same' => 'Passwörter stimmen nicht überein.',
            ]),
            default => null,
        };

        $this->step = min($this->step + 1, $this->totalSteps);
    }

    public function back(): void
    {
        $this->step = max($this->step - 1, 1);
    }

    public function finish(): mixed
    {
        // Schritt-3-Validierung nochmals sicherstellen
        $this->validate([
            'admin_name'     => 'required|string|min:2|max:64',
            'admin_email'    => 'required|email|max:190',
            'admin_password' => 'required|string|min:10|same:admin_password_confirmation',
        ]);

        // Settings speichern
        Setting::setMany([
            'locale'          => $this->locale,
            'timezone'        => $this->timezone,
            'ui_domain'       => $this->ui_domain,
            'mail_domain'     => $this->mail_domain,
            'webmail_domain'  => $this->webmail_domain,
            'setup_completed' => '1',
        ]);

        // .env aktualisieren
        $this->writeEnv([
            'APP_NAME'  => $this->instance_name,
            'APP_HOST'  => $this->ui_domain,
            'APP_URL'   => 'https://' . $this->ui_domain,
            'MTA_SUB'   => explode('.', $this->mail_domain)[0] ?? '',
            'WEBMAIL_DOMAIN' => $this->webmail_domain,
        ]);

        // Admin anlegen oder aktualisieren
        $user = User::where('email', $this->admin_email)->first() ?? new User();
        $user->name     = $this->admin_name;
        $user->email    = $this->admin_email;
        $user->password = Hash::make($this->admin_password);
        $user->role     = 'admin';
        $user->save();

        return redirect()->route('login')->with('setup_done', true);
    }

    private function writeEnv(array $values): void
    {
        $path    = base_path('.env');
        $content = @file_get_contents($path) ?: '';

        foreach ($values as $key => $value) {
            $escaped = str_contains($value, ' ') ? '"' . $value . '"' : $value;
            $line    = $key . '=' . $escaped;
            $pattern = '/^' . preg_quote($key, '/') . '=[^\r\n]*/m';

            if (preg_match($pattern, $content)) {
                $content = preg_replace($pattern, $line, $content);
            } else {
                $content .= "\n{$line}";
            }
        }

        file_put_contents($path, $content);
    }

    public function render()
    {
        $timezones = \DateTimeZone::listIdentifiers(\DateTimeZone::ALL);
        return view('livewire.setup.wizard', compact('timezones'));
    }
}