<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\{Cat, Medicine, Food, Supply, Treatment, Matting, User, ActivityLog};
use App\Exports\UnifiedReportExport;
use Maatwebsite\Excel\Facades\Excel;
use Barryvdh\DomPDF\Facade\Pdf;
use Carbon\Carbon;
use Illuminate\Support\Facades\Gate;

class ReportController extends Controller
{
    public function index(Request $request)
    {
        Gate::authorize('check-access', ['reports', 'read']);

        $module = $request->get('module', 'cats');
        $query = $this->initializeQuery($module);

        $this->applyGlobalFilters($query, $request, $module);
        $this->applyModuleFilters($query, $request, $module);

        if ($request->filled('export')) {
            $filteredData = $query->latest()->get(); 
            return $this->processExport($filteredData, $module, $request->export);
        }

        $results = $query->latest()->paginate(15)->withQueryString();
        $users = User::orderBy('name')->get(['id', 'name']);

        return view('pages.reports.index', compact('results', 'module', 'users'));
    }

    protected function initializeQuery($module)
    {
        return match ($module) {
            'cats'      => Cat::with(['pic']),
            'medicine'  => Medicine::query(),
            'food'      => Food::query(),
            'supplies'  => Supply::query(), 
            'treatment' => Treatment::with(['cat', 'pic']),
            'vaccine', 'deworming', 'flea', 'grooming' => Cat::with(['pic']),
            default     => Cat::query(),
        };
    }

    protected function applyGlobalFilters($query, $request, $module)
    {
        if ($request->filled('q')) {
            $search = $request->q;
            $query->where(function($q) use ($module, $search) {
                $searchCol = $this->getSearchColumn($module);
                $q->where($searchCol, 'like', "%{$search}%");
                if ($module === 'treatment') {
                    $q->orWhereHas('cat', fn($query) => $query->where('nama_kucing', 'like', "%{$search}%"));
                }
            });
        }

        if ($request->filled('pic_id')) {
            $query->where('pic_id', $request->pic_id);
        }

        if ($request->filled('start_date') && $request->filled('end_date')) {
            $dateCol = $this->getDateColumn($module);
            $query->whereBetween($dateCol, [
                Carbon::parse($request->start_date)->startOfDay(),
                Carbon::parse($request->end_date)->endOfDay()
            ]);
        }
    }

    protected function applyModuleFilters($query, $request, $module)
    {
        $status = $request->status;

        // TAMBAHAN: Logika Filter untuk Modul Cats (Sehat/Sakit)
        // Ini yang membuat filter status di populasi kucing bekerja
        if ($module === 'cats' && $request->filled('status')) {
            match($status) {
                'sakit' => $query->whereNotNull('riwayat_sakit_terakhir')->where('riwayat_sakit_terakhir', '!=', ''),
                'sehat' => $query->where(function($q) {
                                $q->whereNull('riwayat_sakit_terakhir')
                                  ->orWhere('riwayat_sakit_terakhir', '');
                            }),
                default => null
            };
        }

        // Modul Maintenance
        if (in_array($module, ['vaccine', 'deworming', 'flea', 'grooming']) && $request->filled('status')) {
            $dateCol = $this->getDateColumn($module);
            match($status) {
                'overdue' => $query->whereNotNull($dateCol)->where($dateCol, '<', now()->toDateString()),
                'soon'    => $query->whereNotNull($dateCol)->whereBetween($dateCol, [now()->toDateString(), now()->addDays(7)->toDateString()]),
                'not_set' => $query->whereNull($dateCol),
                default   => null
            };
        }

        // Modul Inventori
        if (in_array($module, ['medicine', 'food', 'supplies']) && $request->filled('status')) {
            match($status) {
                'critical' => $query->where('qty', '<', 5),
                'expired'  => $query->whereNotNull('expired_date')->where('expired_date', '<', now()->toDateString()),
                'safe'     => $query->where('qty', '>=', 5),
                default    => null
            };
        }
    }

    private function getSearchColumn($module) {
        return match($module) {
            'cats', 'vaccine', 'deworming', 'flea', 'grooming' => 'nama_kucing',
            'medicine' => 'nama_obat',
            'food'     => 'nama_makanan',
            'supplies' => 'nama_perlengkapan',
            default    => 'id'
        };
    }

    private function getDateColumn($module) {
        return match($module) {
            'cats'                             => 'tanggal_lahir',
            'medicine', 'food', 'supplies' => 'expired_date',
            'vaccine'                        => 'jadwal_vaksin',
            'deworming'                      => 'jadwal_obat_cacing',
            'flea'                           => 'jadwal_obat_kutu',
            'grooming'                       => 'jadwal_grooming',
            default                          => 'created_at'
        };
    }

    protected function processExport($data, $module, $format)
    {
        $fileName = "Report_{$module}_" . now()->format('Ymd_His');
        if ($format === 'xlsx') {
            return Excel::download(new UnifiedReportExport($data, $module), "{$fileName}.xlsx");
        }
        $pdf = Pdf::loadView('pages.reports.pdf_template', [
            'data'   => $data,
            'module' => $module,
            'title'  => "Laporan " . ucfirst($module)
        ])->setPaper('a4', 'landscape');
        return $pdf->download("{$fileName}.pdf");
    }
}