<?php

namespace App\Http\Controllers;

use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\DB;

class AuthController extends Controller
{
    // Show the login form
    public function showLogin()
    {
        return view('auth.login');
    }

    public function register(Request $request)
    {
        $validated = $request->validate([
            'name' => ['required', 'string', 'max:255'],
            'email' => ['required', 'email', 'max:255', 'unique:users'],
            'password' => ['required', 'confirmed', 'min:8'],
            'gender' => ['nullable', 'string', 'max:20'],
            'mobile' => ['nullable', 'string', 'max:20'],
            'address' => ['nullable', 'string', 'max:1000'],
            'age' => ['nullable', 'integer', 'min:1', 'max:120'],
            'yoga_teacher' => ['nullable', 'in:1,0'],
            'experience' => ['nullable', 'string', 'max:1000'],
            'yoga_center_name' => ['nullable', 'string', 'max:255'],
            'reason_member' => ['nullable', 'string', 'max:1000'],
            'aadhar' => ['nullable', 'string', 'max:255'],
            'state_id' => ['required'],
        ]);

        try {
            $newUser = DB::transaction(function () use ($validated, $request) {
                $lastRegistration = DB::table('users')
                    ->lockForUpdate()
                    ->max('registration_number');

                $newRegistrationNumber = $lastRegistration ? ($lastRegistration + 1) : 27000;

                $user = User::create([
                    'name' => $validated['name'],
                    'email' => $validated['email'],
                    'password' => Hash::make($validated['password']),
                    'gender' => $validated['gender'] ?? null,
                    'mobile' => $validated['mobile'] ?? null,
                    'address' => $validated['address'] ?? null,
                    'age' => $validated['age'] ?? null,
                    'yoga_teacher' => (bool) ($validated['yoga_teacher'] ?? 0),
                    'experience' => $validated['experience'] ?? null,
                    'yoga_center_name' => $validated['yoga_center_name'] ?? null,
                    'reason_member' => $validated['reason_member'] ?? null,
                    'state_id' => $validated['state_id'] ?? null,
                    'district_id' => $request->district_id ?? null,
                    'renew_date' => date('Y-m-d h:i:s'),
                    'membership_type' => 'normal',
                    'registration_number' => $newRegistrationNumber,
                    'id_allow' => 0,
                    'is_admin' => 0
                ]);
            });

            Auth::login($user);
            $request->session()->regenerate();

            return redirect('/dashboard')->with('status', 'Welcome! Your membership request has been received.');
        } catch (\Exception $e) {
            return redirect()->back()
                ->withInput()
                ->withErrors(['error' => 'Registration failed due to a server collision error. Please try again.']);
        }
    }

    // Process the login request
    public function login(Request $request)
    {
        $credentials = $request->validate([
            'email' => ['required', 'email'],
            'password' => ['required'],
        ]);

        // Attempt authentication
        if (Auth::attempt($credentials, $request->boolean('remember'))) {
            $request->session()->regenerate();

            // Redirect based on the database column
            if (Auth::user()->is_admin) {
                return redirect()->intended('/admindashboard');
            }

            return redirect()->intended('/dashboard');
        }

        // Return error if authentication fails
        return back()->withErrors([
            'email' => 'The provided credentials do not match our records.',
        ])->onlyInput('email');
    }

    // Process logout
    public function logout(Request $request)
    {
        Auth::logout();
        $request->session()->invalidate();
        $request->session()->regenerateToken();

        return redirect('/login');
    }
}