<?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 = $user->subscription()->where('status', 'active')->latest()->first();
        $expiresAt = $sub ? $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();
        
        $stats = [
            'shortlisted_count' => $shortlistedCount,
            'messages_sent' => $messagesSent,
            'profile_views_given' => 45, // Static/mock analytic metric for page visits
            'days_remaining' => (int)$daysRemaining,
        ];

        // 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;
            return [
                'id' => $w->id,
                'name' => $w->name,
                'nationality' => $w->nationality,
                'category' => $w->category ? $w->category->name : 'General Helper',
                'skills' => $w->skills->pluck('name')->toArray(),
                'availability' => $w->availability,
                'photo_url' => null,
                'verified' => (bool)$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. Announcements
        $dbAnnouncements = Announcement::latest()->limit(5)->get();
        $announcements = $dbAnnouncements->map(function ($ann) {
            return [
                'id' => $ann->id,
                'title' => $ann->title,
                'body' => $ann->body,
                'created_at' => $ann->created_at->format('M d, Y'),
            ];
        })->toArray();

        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,
        ]);
    }
}