<?php

namespace App\Http\Controllers;

use App\Models\Event;
use App\Models\Issue;
use Illuminate\Http\Request;
use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\DB;
use Illuminate\View\View;

class DashboardController extends Controller
{
    public function __invoke(Request $request): View
    {
        $user = $request->user();
        $projectIds = $user->projects()->pluck('projects.id');

        $unresolvedCount = Issue::whereIn('project_id', $projectIds)
            ->where('status', 'unresolved')
            ->count();

        $events24h = Event::whereIn('project_id', $projectIds)
            ->where('created_at', '>=', Carbon::now()->subDay())
            ->count();

        $mostActiveProjects = $user->projects()
            ->withCount(['issues' => fn ($q) => $q->where('status', 'unresolved')])
            ->withCount(['events' => fn ($q) => $q->where('events.created_at', '>=', Carbon::now()->subDay())])
            ->orderByDesc('events_count')
            ->limit(5)
            ->get();

        $days = (int) $request->query('days', 14);
        $eventsOverTime = $this->getEventsOverTime($projectIds, $days);

        return view('dashboard', [
            'unresolvedCount' => $unresolvedCount,
            'events24h' => $events24h,
            'mostActiveProjects' => $mostActiveProjects,
            'eventsOverTime' => $eventsOverTime,
            'days' => $days,
        ]);
    }

    private function getEventsOverTime($projectIds, int $days): array
    {
        $since = Carbon::now()->subDays($days)->startOfDay();

        $rows = Event::whereIn('project_id', $projectIds)
            ->where('created_at', '>=', $since)
            ->select(DB::raw('DATE(created_at) as date'), DB::raw('COUNT(*) as count'))
            ->groupBy('date')
            ->orderBy('date')
            ->pluck('count', 'date')
            ->toArray();

        $result = [];
        for ($i = $days - 1; $i >= 0; $i--) {
            $date = Carbon::now()->subDays($i)->format('Y-m-d');
            $result[] = [
                'date' => $date,
                'count' => $rows[$date] ?? 0,
            ];
        }

        return $result;
    }
}