<?php

namespace App\Http\Controllers;

use App\Models\UserDosen;
use App\Models\UserStaff;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Hash;

class DebugController extends Controller
{
    /**
     * Debug login process
     */
    public function debugLogin($nip, $password)
    {
        $result = [
            'nip' => $nip,
            'password_submitted' => $password,
        ];

        // Try to find user in UserDosen
        $userDosen = UserDosen::where('nip', $nip)->first();
        if ($userDosen) {
            $result['found_in'] = 'users_dosen';
            $result['user_name'] = $userDosen->nama;
            $result['password_hash'] = substr($userDosen->password, 0, 20) . '...';
            $result['password_matches'] = Hash::check($password, $userDosen->password);
            return response()->json($result);
        }

        // Try to find user in UserStaff
        $userStaff = UserStaff::where('nip', $nip)->first();
        if ($userStaff) {
            $result['found_in'] = 'users_staff';
            $result['user_name'] = $userStaff->nama;
            $result['password_hash'] = substr($userStaff->password, 0, 20) . '...';
            $result['password_matches'] = Hash::check($password, $userStaff->password);
            return response()->json($result);
        }

        $result['found_in'] = null;
        $result['message'] = 'User not found with NIP: ' . $nip;
        return response()->json($result);
    }

    /**
     * List all users for debugging
     */
    public function listUsers()
    {
        $dosen = UserDosen::select('id', 'nama', 'nip', 'role')->limit(5)->get();
        $staff = UserStaff::select('id', 'nama', 'nip', 'role')->limit(5)->get();

        return response()->json([
            'dosen_count' => UserDosen::count(),
            'staff_count' => UserStaff::count(),
            'sample_dosen' => $dosen,
            'sample_staff' => $staff,
        ]);
    }

    /**
     * Check password status for UserStaff
     */
    public function checkStaffPasswords()
    {
        $staffUsers = UserStaff::limit(10)->get();
        
        $result = [
            'total_staff' => UserStaff::count(),
            'checked_count' => count($staffUsers),
            'records' => [],
        ];

        foreach ($staffUsers as $staff) {
            $passwordField = $staff->password;
            $isHashed = strpos($passwordField, '$2') === 0;
            
            $record = [
                'id' => $staff->id,
                'nip' => $staff->nip,
                'nama' => $staff->nama,
                'password_preview' => substr($passwordField, 0, 30) . '...',
                'is_hashed' => $isHashed,
                'password_algo' => $isHashed ? 'Bcrypt' : 'Plain Text',
            ];

            // If plain text, test if it matches common password
            if (!$isHashed) {
                $record['is_plain_text'] = true;
                $record['test_match_password123'] = ($passwordField === 'password123');
            }

            $result['records'][] = $record;
        }

        return response()->json($result);
    }

    /**
     * Hash all UserStaff passwords to 'password123'
     */
    public function hashStaffPasswords()
    {
        $count = 0;
        $staffUsers = UserStaff::all();
        $result = [
            'message' => 'Hashing staff passwords to password123',
            'count' => 0,
            'records' => [],
        ];

        foreach ($staffUsers as $staff) {
            $staff->password = Hash::make('password123');
            $staff->save();
            $count++;
            
            $result['records'][] = [
                'nip' => $staff->nip,
                'nama' => $staff->nama,
                'status' => 'hashed',
            ];
        }

        $result['count'] = $count;
        $result['success'] = true;
        $result['message'] = "✅ Successfully hashed {$count} staff passwords to 'password123'";

        return response()->json($result);
    }

    /**
     * Test programmatic login for UserStaff
     */
    public function testStaffLogin()
    {
        // Find a staff user
        $staff = UserStaff::first();
        
        if (!$staff) {
            return response()->json(['error' => 'No staff users found'], 404);
        }

        // Try to login programmatically
        try {
            session()->regenerate();
            Auth::guard('web')->login($staff);
            
            return response()->json([
                'success' => true,
                'message' => 'Staff login successful',
                'nip' => $staff->nip,
                'nama' => $staff->nama,
                'authenticated' => Auth::check(),
                'user_id' => Auth::id(),
                'redirect_url' => route('welcome'),
            ]);
        } catch (\Exception $e) {
            return response()->json([
                'success' => false,
                'error' => $e->getMessage(),
            ], 500);
        }
    }
}