<?php

namespace App\Http\Controllers;

use App\Models\Subscription;
use Illuminate\Http\Request;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\Validator;

class SubscriptionController extends Controller
{
    /**
     * Subscribe an email address to notifications.
     */
    public function subscribe(Request $request): JsonResponse
    {
        $validator = Validator::make($request->all(), [
            'email' => 'required|email|max:255',
        ]);

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'message' => 'Please provide a valid email address.',
                'errors' => $validator->errors(),
            ], 422);
        }

        $email = $request->input('email');

        // Check if email already exists
        $existing = Subscription::where('email', $email)->first();

        if ($existing) {
            if ($existing->is_active) {
                return response()->json([
                    'success' => false,
                    'message' => 'This email is already subscribed to notifications.',
                ], 409);
            } else {
                // Reactivate subscription
                $existing->is_active = true;
                $existing->save();

                return response()->json([
                    'success' => true,
                    'message' => 'Your subscription has been reactivated! You will receive email notifications for new docket entries.',
                ]);
            }
        }

        // Create new subscription
        Subscription::create([
            'email' => $email,
            'is_active' => true,
        ]);

        return response()->json([
            'success' => true,
            'message' => 'Successfully subscribed! You will receive email notifications for new docket entries.',
        ]);
    }

    /**
     * Unsubscribe using token.
     */
    public function unsubscribe(Request $request, string $token): JsonResponse
    {
        $subscription = Subscription::where('unsubscribe_token', $token)->first();

        if (!$subscription) {
            return response()->json([
                'success' => false,
                'message' => 'Invalid unsubscribe token.',
            ], 404);
        }

        $subscription->is_active = false;
        $subscription->save();

        return response()->json([
            'success' => true,
            'message' => 'You have been successfully unsubscribed from notifications.',
        ]);
    }
}