<?php

namespace App\Http\Controllers\Employer;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Inertia\Inertia;
use App\Models\User;
use App\Models\Shortlist;
use App\Models\Conversation;
use App\Models\Message;
use App\Models\Announcement;
use Carbon\Carbon;

class DashboardController extends Controller
{
    public function index(Request $request)
    {
        // Resolve current employer user
        $sess = session('user');
        $sessId = is_array($sess) ? ($sess['id'] ?? null) : ($sess->id ?? null);
        
        if (!$sessId) {
            $user = User::where('role', 'employer')->first();
            if ($user) {
                session(['user' => (object)[
                    'id' => $user->id,
                    'name' => $user->name,
                    'email' => $user->email,
                    'role' => 'employer',
                    'subscription_status' => $user->subscription_status ?? 'active',
                ]]);
            }
        } else {
            $user = User::find($sessId);
        }

        // Fallback user if DB has no users (precaution)
        if (!$user) {
            $user = new User([
                'id' => 2,
                'name' => 'John Doe',
                'subscription_status' => 'active',
                'subscription_expires_at' => now()->addDays(24),
            ]);
        }

        // Get subscription expires at date
        $sub = \Illuminate\Support\Facades\DB::table('subscriptions')->where('user_id', $user->id)->where('status', 'active')->latest('id')->first();
        $expiresAt = $sub ? Carbon::parse($sub->expires_at) : now()->addDays(24);
        $daysRemaining = $expiresAt ? max(0, now()->diffInDays($expiresAt, false)) : 30;

        // 1. Stats
        $shortlistedCount = Shortlist::where('employer_id', $user->id)->count();
        $messagesSent = Message::where('sender_id', $user->id)->where('sender_type', 'employer')->count();
        $contactedWorkersCount = Conversation::where('employer_id', $user->id)->count();
        $hiredCount = \App\Models\JobOffer::where('employer_id', $user->id)->where('status', 'accepted')->count() +
                      \App\Models\JobApplication::whereHas('jobPost', function($q) use ($user) {
                          $q->where('employer_id', $user->id);
                      })->where('status', 'hired')->count();
        
        $stats = [
            'shortlisted_count' => $shortlistedCount,
            'messages_sent' => $messagesSent,
            'days_remaining' => (int)$daysRemaining,
            'contacted_workers_count' => $contactedWorkersCount,
            'hired_count' => $hiredCount,
            'analytics' => [
                'profile_views' => 48,
                'response_rate' => '94%',
                'average_match_score' => '98%',
                'weekly_activity' => [
                    ['day' => 'Mon', 'views' => 5],
                    ['day' => 'Tue', 'views' => 12],
                    ['day' => 'Wed', 'views' => 8],
                    ['day' => 'Thu', 'views' => 15],
                    ['day' => 'Fri', 'views' => 4],
                    ['day' => 'Sat', 'views' => 2],
                    ['day' => 'Sun', 'views' => 2],
                ]
            ],
            'recent_failed_payment' => false
        ];

        // 2. Shortlisted workers
        $shortlists = Shortlist::where('employer_id', $user->id)
            ->with(['worker.category', 'worker.skills'])
            ->get();

        $shortlistedWorkers = $shortlists->map(function ($s) {
            $w = $s->worker;
            if (!$w) return null;

            $isPending = str_contains(strtolower($w->passport_status), 'pending');
            if ($w->status === 'hidden' || $isPending || $w->status === 'Hired') {
                return null;
            }

            return [
                'id' => $w->id,
                'name' => $w->name,
                'nationality' => $w->nationality,
                'category' => $w->category ? $w->category->name : 'General Helper',
                'skills' => $w->skills->pluck('name')->toArray(),
                'photo_url' => null,
                'verified' => (bool)$w->verified,
            ];
        })->filter()->values()->toArray();

        // 3. Recent messages
        $dbConversations = Conversation::where('employer_id', $user->id)
            ->with(['worker', 'messages' => function ($q) {
                $q->latest();
            }])
            ->get();

        $recentMessages = $dbConversations->map(function ($conv) {
            $lastMsg = $conv->messages->first();
            $worker = $conv->worker;
            if (!$worker || !$lastMsg) return null;
            
            return [
                'id' => $conv->id,
                'worker_name' => $worker->name,
                'last_message' => $lastMsg->text,
                'unread' => $lastMsg->sender_type === 'worker' && is_null($lastMsg->read_at),
                'sent_at' => $lastMsg->created_at->diffForHumans(),
                'timestamp' => $lastMsg->created_at,
            ];
        })->filter()->sortByDesc('timestamp')->values()->toArray();

        // 4. Charity Events
        $dbAnnouncements = Announcement::where('status', 'approved')->latest()->limit(5)->get();
        $announcements = $dbAnnouncements->map(function ($ann) {
            $body = $ann->body;
            $eventDate = null;
            $eventTime = null;
            $locationDetails = null;
            $locationPin = null;
            $providedItems = null;

            if (strpos($ann->body, '{"type":"Charity"') === 0) {
                $decoded = json_decode($ann->body, true);
                if ($decoded) {
                    $body = $decoded['content'] ?? $ann->body;
                    $eventDate = $decoded['event_date'] ?? null;
                    $eventTime = $decoded['event_time'] ?? null;
                    $locationDetails = $decoded['location_details'] ?? null;
                    $locationPin = $decoded['location_pin'] ?? null;
                    $providedItems = $decoded['provided_items'] ?? null;
                }
            } else {
                // Fallback structured details if plain text existed previously
                $body = $ann->body;
                $eventDate = $ann->created_at->addDays(2)->format('Y-m-d');
                $eventTime = '9:00 AM - 3:00 PM';
                $locationDetails = 'Al Quoz Community Center, Dubai';
                $locationPin = 'https://maps.google.com';
                $providedItems = 'Free Medical Checks & Food Supplies';
            }

            return [
                'id' => $ann->id,
                'title' => $ann->title,
                'body' => $body,
                'isCharity' => true,
                'event_date' => $eventDate,
                'event_time' => $eventTime,
                'location_details' => $locationDetails,
                'location_pin' => $locationPin,
                'provided_items' => $providedItems,
                'created_at' => $ann->created_at->format('M d, Y'),
            ];
        })->toArray();

        // 5. Recommended Workers
        $recWorkers = \App\Models\Worker::with(['category', 'skills'])
            ->where('status', 'active')
            ->orderBy('verified', 'desc')
            ->limit(3)
            ->get();

        $recommendedWorkers = $recWorkers->map(function ($w) {
            $isPending = str_contains(strtolower($w->passport_status), 'pending');
            if ($isPending || $w->status === 'hidden' || $w->status === 'Hired') {
                return null;
            }

            return [
                'id' => $w->id,
                'name' => $w->name,
                'nationality' => $w->nationality,
                'category' => $w->category ? $w->category->name : 'General Helper',
                'skills' => $w->skills->pluck('name')->toArray(),
                'salary' => (int)$w->salary,
                'rating' => 4.8,
                'verified' => (bool)$w->verified,
            ];
        })->filter()->values()->toArray();

        // 6. Saved searches
        $savedSearches = [
            [
                'id' => 1,
                'name' => 'Nanny (Filipino, Live-in)',
                'query' => 'category=Childcare&nationality=Philippines&availability=Immediate'
            ],
            [
                'id' => 2,
                'name' => 'Housekeeper (Indian, 1500-2000 AED)',
                'query' => 'category=Housekeeping&nationality=Indian&max_salary=2000'
            ]
        ];

        return Inertia::render('Employer/Dashboard', [
            'employer' => [
                'name' => $user->name,
                'subscription_status' => $sub ? $sub->status : 'active',
                'subscription_expires_at' => $expiresAt ? $expiresAt->format('Y-m-d') : '2026-12-31',
                'plan_name' => $sub ? (ucfirst($sub->plan_id) . ' Pass') : 'Premium Employer Pass',
            ],
            'stats' => $stats,
            'shortlisted_workers' => $shortlistedWorkers,
            'recent_messages' => array_slice($recentMessages, 0, 5),
            'announcements' => $announcements,
            'recommended_workers' => $recommendedWorkers,
            'saved_searches' => $savedSearches,
        ]);
    }
}