<?php

namespace App\Http\Controllers;

use App\Models\DatabaseConnection;
use App\Services\DatabaseConnectionManager;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;
use InvalidArgumentException;
use RuntimeException;
use Throwable;

class DatabaseConnectionController extends Controller
{
    public function __construct(
        private readonly DatabaseConnectionManager $connections
    ) {
    }

    public function index(): View
    {
        return view('database-connections.index', [
            'connections' => DatabaseConnection::query()->orderBy('name')->get(),
            'drivers' => [
                'sqlsrv' => 'SQL Server',
                'pgsql' => 'PostgreSQL',
                'mysql' => 'MySQL',
                'mariadb' => 'MariaDB',
            ],
        ]);
    }

    public function store(Request $request): RedirectResponse
    {
        $data = $this->validateConnection($request);

        try {
            $this->connections->test($data);
            $connection = $this->connections->store($data);
            $request->attributes->set('audit_metadata', [
                'name' => $connection->name,
                'driver' => $connection->driver,
                'host' => $connection->host,
            ]);

            return back()->with('success', "Connection [{$connection->name}] added.");
        } catch (RuntimeException $e) {
            return back()->withInput()->with('error', $e->getMessage());
        } catch (Throwable) {
            return back()->withInput()->with('error', 'Failed to add database connection.');
        }
    }

    public function test(Request $request): RedirectResponse
    {
        $data = $this->validateConnection($request, requirePassword: true);

        try {
            $message = $this->connections->test($data);
            $request->attributes->set('audit_metadata', [
                'driver' => $data['driver'],
                'host' => $data['host'],
                'test' => true,
            ]);

            return back()->with('success', $message);
        } catch (RuntimeException $e) {
            return back()->withInput()->with('error', $e->getMessage());
        }
    }

    public function destroy(Request $request, DatabaseConnection $databaseConnection): RedirectResponse
    {
        $name = $databaseConnection->name;
        $request->attributes->set('audit_metadata', [
            'name' => $name,
            'driver' => $databaseConnection->driver,
            'host' => $databaseConnection->host,
        ]);
        $databaseConnection->delete();

        return back()->with('success', "Connection [{$name}] removed.");
    }

    private function validateConnection(Request $request, bool $requirePassword = false): array
    {
        $rules = [
            'name' => ['required', 'string', 'max:100'],
            'driver' => ['required', 'in:sqlsrv,pgsql,mysql,mariadb'],
            'host' => ['required', 'string', 'max:255'],
            'port' => ['required', 'integer', 'min:1', 'max:65535'],
            'database' => ['nullable', 'string', 'max:128'],
            'username' => ['required', 'string', 'max:128'],
            'password' => [$requirePassword ? 'required' : 'nullable', 'string', 'max:255'],
        ];

        $data = $request->validate($rules);

        if (empty($data['port'])) {
            $data['port'] = match ($data['driver']) {
                'sqlsrv' => 1433,
                'pgsql' => 5432,
                default => 3306,
            };
        }

        return $data;
    }
}