<?php

namespace App\Http\Controllers;

use App\Models\Role;
use App\Models\User;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Artisan;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Str;
use Illuminate\View\View;

class InstallerController extends Controller
{
    public function show(Request $request): View|RedirectResponse
    {
        if ($this->envExists()) {
            return redirect('/');
        }

        return view('installer', [
            'appUrl' => $request->getSchemeAndHttpHost(),
        ]);
    }

    public function store(Request $request): View|RedirectResponse
    {
        if ($this->envExists()) {
            return redirect('/');
        }

        $data = $request->validate([
            'app_url' => ['required', 'url'],
            'db_host' => ['required', 'string', 'max:255'],
            'db_port' => ['nullable', 'integer'],
            'db_database' => ['required', 'string', 'max:255'],
            'db_username' => ['required', 'string', 'max:255'],
            'db_password' => ['nullable', 'string'],
            'admin_name' => ['required', 'string', 'max:255'],
            'admin_email' => ['required', 'email', 'max:255'],
            'admin_password' => ['required', 'string', 'min:8'],
        ]);

        $appKey = 'base64:' . base64_encode(random_bytes(32));

        $envLines = [
            'APP_NAME="speedBB"',
            'APP_ENV=production',
            'APP_DEBUG=false',
            'APP_URL=' . $data['app_url'],
            'APP_KEY=' . $appKey,
            '',
            'DB_CONNECTION=mysql',
            'DB_HOST=' . $data['db_host'],
            'DB_PORT=' . ($data['db_port'] ?: 3306),
            'DB_DATABASE=' . $data['db_database'],
            'DB_USERNAME=' . $data['db_username'],
            'DB_PASSWORD=' . ($data['db_password'] ?? ''),
            '',
            'MAIL_MAILER=sendmail',
            'MAIL_SENDMAIL_PATH="/usr/sbin/sendmail -bs -i"',
            'MAIL_FROM_ADDRESS="hello@example.com"',
            'MAIL_FROM_NAME="speedBB"',
        ];

        $this->writeEnv(implode("\n", $envLines) . "\n");

        config([
            'app.key' => $appKey,
            'app.url' => $data['app_url'],
            'database.default' => 'mysql',
            'database.connections.mysql.host' => $data['db_host'],
            'database.connections.mysql.port' => (int) ($data['db_port'] ?: 3306),
            'database.connections.mysql.database' => $data['db_database'],
            'database.connections.mysql.username' => $data['db_username'],
            'database.connections.mysql.password' => $data['db_password'] ?? '',
            'mail.default' => 'sendmail',
            'mail.mailers.sendmail.path' => '/usr/sbin/sendmail -bs -i',
        ]);

        DB::purge('mysql');

        try {
            DB::connection('mysql')->getPdo();
        } catch (\Throwable $e) {
            $this->removeEnv();
            return view('installer', [
                'appUrl' => $data['app_url'],
                'error' => 'Database connection failed: ' . $e->getMessage(),
                'old' => $data,
            ]);
        }

        $migrateExit = Artisan::call('migrate', ['--force' => true]);
        if ($migrateExit !== 0) {
            $this->removeEnv();
            return view('installer', [
                'appUrl' => $data['app_url'],
                'error' => 'Migration failed. Please check your database credentials.',
                'old' => $data,
            ]);
        }

        $adminRole = Role::firstOrCreate(['name' => 'ROLE_ADMIN']);
        $founderRole = Role::firstOrCreate(['name' => 'ROLE_FOUNDER']);

        $user = User::create([
            'name' => $data['admin_name'],
            'name_canonical' => Str::lower(trim($data['admin_name'])),
            'email' => $data['admin_email'],
            'password' => Hash::make($data['admin_password']),
            'email_verified_at' => now(),
        ]);

        $user->roles()->sync([$adminRole->id, $founderRole->id]);

        return view('installer-success');
    }

    private function envExists(): bool
    {
        return file_exists(base_path('.env'));
    }

    private function writeEnv(string $contents): void
    {
        $path = base_path('.env');
        file_put_contents($path, $contents);
    }

    private function removeEnv(): void
    {
        $path = base_path('.env');
        if (file_exists($path)) {
            unlink($path);
        }
    }
}