<?php

namespace App\Http\Controllers;

use App\Models\Site;
use Illuminate\Http\Request;

class DashboardController extends Controller
{
    public function index()
    {
        $sites = auth()->user()->sites()
            ->with(['uptimeChecks' => function($query) {
                $query->latest('checked_at')->limit(1);
            }, 'sslCertificates' => function($query) {
                $query->latest('checked_at')->limit(1);
            }])
            ->withCount('brokenLinks')
            ->get();

        // Calculate stats for each site
        $sites->each(function($site) {
            $checks = $site->uptimeChecks()
                ->where('checked_at', '>=', now()->subDays(30))
                ->get();

            $totalChecks = $checks->count();
            $successfulChecks = $checks->where('status_code', '>=', 200)
                ->where('status_code', '<', 400)
                ->count();

            $site->uptime_percentage = $totalChecks > 0 ? ($successfulChecks / $totalChecks) * 100 : 0;
            $site->avg_response_time = $checks->avg('response_time_ms');
        });

        // Calculate overall stats
        $totalSites = $sites->count();
        $sitesUp = $sites->filter(function($site) {
            $latestCheck = $site->uptimeChecks->first();
            return $latestCheck && $latestCheck->status_code >= 200 && $latestCheck->status_code < 400;
        })->count();
        $sitesDown = $sites->filter(function($site) {
            $latestCheck = $site->uptimeChecks->first();
            return $latestCheck && ($latestCheck->status_code < 200 || $latestCheck->status_code >= 400);
        })->count();
        $avgUptime = $sites->avg('uptime_percentage') ?? 0;

        // Prepare chart data for last 7 days
        $chartData = null;
        if ($sites->isNotEmpty()) {
            $labels = [];
            for ($i = 6; $i >= 0; $i--) {
                $labels[] = now()->subDays($i)->format('M d');
            }

            $datasets = $sites->map(function($site) use ($labels) {
                $data = [];
                for ($i = 6; $i >= 0; $i--) {
                    $date = now()->subDays($i)->startOfDay();
                    $checks = $site->uptimeChecks()
                        ->whereDate('checked_at', $date)
                        ->get();

                    $totalChecks = $checks->count();
                    $successfulChecks = $checks->where('status_code', '>=', 200)
                        ->where('status_code', '<', 400)
                        ->count();

                    $data[] = $totalChecks > 0 ? round(($successfulChecks / $totalChecks) * 100, 2) : null;
                }

                return [
                    'label' => $site->name,
                    'data' => $data,
                    'color' => '#' . substr(md5($site->id), 0, 6)
                ];
            })->toArray();

            $chartData = [
                'labels' => $labels,
                'datasets' => $datasets
            ];
        }

        return view('dashboard', compact(
            'sites',
            'totalSites',
            'sitesUp',
            'sitesDown',
            'avgUptime',
            'chartData'
        ));
    }

    public function show(Site $site)
    {
        $this->authorize('view', $site);

        // Get uptime checks for the last 30 days
        $uptimeChecks = $site->uptimeChecks()
            ->where('checked_at', '>=', now()->subDays(30))
            ->orderBy('checked_at', 'asc')
            ->get();

        // Get latest SSL certificate
        $latestSslCert = $site->sslCertificates()
            ->latest('checked_at')
            ->first();

        // Get broken links
        $brokenLinks = $site->brokenLinks()
            ->orderBy('last_checked_at', 'desc')
            ->paginate(20);

        // Calculate uptime percentage
        $totalChecks = $uptimeChecks->count();
        $successfulChecks = $uptimeChecks->where('status_code', '>=', 200)
            ->where('status_code', '<', 400)
            ->count();
        $uptimePercentage = $totalChecks > 0 ? round(($successfulChecks / $totalChecks) * 100, 2) : 0;

        // Calculate average response time
        $avgResponseTime = $uptimeChecks->avg('response_time_ms');

        // Prepare chart data
        $chartLabels = $uptimeChecks->pluck('checked_at')->map(fn($date) => $date->format('M d H:i'))->toArray();
        $chartData = $uptimeChecks->pluck('response_time_ms')->toArray();
        $chartStatusCodes = $uptimeChecks->pluck('status_code')->toArray();

        return view('dashboard.show', compact(
            'site',
            'uptimeChecks',
            'latestSslCert',
            'brokenLinks',
            'uptimePercentage',
            'avgResponseTime',
            'chartLabels',
            'chartData',
            'chartStatusCodes'
        ));
    }
}