<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\User;
use App\Models\EmployerProfile;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Validator;
use Illuminate\Support\Str;

class EmployerAuthController extends Controller
{
    /**
     * Authenticate an employer and return a secure Bearer token.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function login(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'email' => 'required|email',
            'password' => 'required|string',
        ]);

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'message' => 'Validation error.',
                'errors' => $validator->errors()
            ], 422);
        }

        try {
            $user = User::where('email', $request->email)->where('role', 'employer')->first();

            if (!$user || !Hash::check($request->password, $user->password)) {
                return response()->json([
                    'success' => false,
                    'message' => 'Invalid email or password.'
                ], 401);
            }

            $profile = EmployerProfile::where('user_id', $user->id)->first();
            $verification_status = $profile ? $profile->verification_status : 'approved';

            if ($verification_status === 'pending') {
                return response()->json([
                    'success' => false,
                    'message' => 'Your account is pending verification.'
                ], 403);
            }

            if ($verification_status === 'rejected') {
                return response()->json([
                    'success' => false,
                    'message' => 'Your account verification has been rejected.',
                    'reason' => $profile->rejection_reason ?? 'Verification rejected.'
                ], 403);
            }

            // Generate and assign a fresh API token
            $apiToken = Str::random(80);
            $user->update(['api_token' => $apiToken]);

            return response()->json([
                'success' => true,
                'message' => 'Employer logged in successfully.',
                'data' => [
                    'employer' => $user->load('employerProfile'),
                    'token' => $apiToken
                ]
            ], 200);

        } catch (\Exception $e) {
            logger()->error('Mobile Employer Login Failure: ' . $e->getMessage());

            return response()->json([
                'success' => false,
                'message' => 'An error occurred during login. Please try again.',
                'error' => app()->environment('local') ? $e->getMessage() : 'Internal Server Error'
            ], 500);
        }
    }

    /**
     * Register a new employer via API.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function register(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'company_name' => 'required|string|max:255',
            'name' => 'required|string|max:255',
            'email' => 'required|string|email|max:255|unique:users,email',
            'phone' => 'required|string|max:50',
            'password' => 'required|string|min:8|confirmed',
        ]);

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'message' => 'Validation error.',
                'errors' => $validator->errors()
            ], 422);
        }

        try {
            // Generate API token
            $apiToken = Str::random(80);

            $user = null;
            \Illuminate\Support\Facades\DB::transaction(function () use ($request, $apiToken, &$user) {
                $user = User::create([
                    'name' => $request->name,
                    'email' => $request->email,
                    'password' => Hash::make($request->password),
                    'role' => 'employer',
                    'subscription_status' => 'active', // Auto-active
                    'subscription_expires_at' => now()->addDays(30),
                    'api_token' => $apiToken,
                ]);

                EmployerProfile::create([
                    'user_id' => $user->id,
                    'company_name' => $request->company_name,
                    'phone' => $request->phone,
                    'country' => 'United Arab Emirates',
                    'verification_status' => 'approved', // Auto-approved
                    'language' => 'English',
                    'notifications' => true,
                ]);

                // Create active premium subscription
                \Illuminate\Support\Facades\DB::table('subscriptions')->insert([
                    'user_id' => $user->id,
                    'plan_id' => 'premium',
                    'amount_aed' => 199.00,
                    'starts_at' => now(),
                    'expires_at' => now()->addDays(30),
                    'status' => 'active',
                    'created_at' => now(),
                    'updated_at' => now(),
                ]);
            });

            return response()->json([
                'success' => true,
                'message' => 'Employer registered successfully.',
                'data' => [
                    'employer' => $user->load('employerProfile'),
                    'token' => $apiToken
                ]
            ], 201);

        } catch (\Exception $e) {
            logger()->error('Mobile Employer Registration Failure: ' . $e->getMessage());

            return response()->json([
                'success' => false,
                'message' => 'An error occurred during registration. Please try again.',
                'error' => app()->environment('local') ? $e->getMessage() : 'Internal Server Error'
            ], 500);
        }
    }
}