<?php

namespace App\Http\Controllers\Finance;

use App\Http\Controllers\Controller;
use App\Models\CorporateVehicle;
use App\Models\VehicleLog;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\View\View;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
use Symfony\Component\HttpFoundation\StreamedResponse;

class VehicleLogController extends Controller
{
    public function index(Request $request): View|Response
    {
        if ($request->header('HX-Request')) {
            return response('', 200)->header('HX-Redirect', route('finance.vehicle-logs'));
        }

        $tenantId = session('tenant_id', 1);
        $vehicles = CorporateVehicle::where('tenant_id', $tenantId)
            ->where('status', 'active')
            ->orderBy('plate_number')
            ->get();

        return view('finance.vehicle-logs', [
            'vehicles' => $vehicles,
            'tripTypes' => VehicleLog::tripTypeLabels(),
            'locationTypes' => VehicleLog::locationTypeLabels(),
        ]);
    }

    public function list(Request $request): JsonResponse
    {
        $tenantId = session('tenant_id', 1);

        $request->validate([
            'vehicle_id' => 'required|integer',
            'start_date' => 'required|date',
            'end_date' => 'required|date|after_or_equal:start_date',
        ]);

        $vehicleId = $request->vehicle_id;
        $startDate = $request->start_date;
        $endDate = $request->end_date;

        // 차량 정보
        $vehicle = CorporateVehicle::where('tenant_id', $tenantId)
            ->findOrFail($vehicleId);

        // 전체 운행기록 수 (해당 차량)
        $totalCount = VehicleLog::where('tenant_id', $tenantId)
            ->where('vehicle_id', $vehicleId)
            ->count();

        $logs = VehicleLog::where('tenant_id', $tenantId)
            ->where('vehicle_id', $vehicleId)
            ->whereBetween('log_date', [$startDate, $endDate])
            ->orderBy('log_date')
            ->orderBy('id')
            ->get();

        // 월별 합계
        $totals = [
            'business_km' => $logs->whereIn('trip_type', ['commute_to', 'commute_from', 'business'])->sum('distance_km'),
            'personal_km' => $logs->where('trip_type', 'personal')->sum('distance_km'),
            'total_km' => $logs->sum('distance_km'),
        ];

        return response()->json([
            'success' => true,
            'data' => [
                'vehicle' => $vehicle,
                'logs' => $logs,
                'totals' => $totals,
                'totalCount' => $totalCount,
            ],
        ]);
    }

    public function store(Request $request): JsonResponse
    {
        $tenantId = session('tenant_id', 1);

        $request->validate([
            'vehicle_id' => 'required|integer|exists:corporate_vehicles,id',
            'log_date' => 'required|date',
            'driver_name' => 'required|string|max:50',
            'trip_type' => 'required|in:commute_to,commute_from,business,personal',
            'distance_km' => 'required|integer|min:0',
        ]);

        // 해당 차량이 현재 테넌트의 것인지 확인
        CorporateVehicle::where('tenant_id', $tenantId)
            ->findOrFail($request->vehicle_id);

        $log = VehicleLog::create([
            'tenant_id' => $tenantId,
            'vehicle_id' => $request->vehicle_id,
            'log_date' => $request->log_date,
            'department' => $request->department,
            'driver_name' => $request->driver_name,
            'trip_type' => $request->trip_type,
            'departure_type' => $request->departure_type,
            'departure_name' => $request->departure_name,
            'departure_address' => $request->departure_address,
            'arrival_type' => $request->arrival_type,
            'arrival_name' => $request->arrival_name,
            'arrival_address' => $request->arrival_address,
            'distance_km' => $request->distance_km,
            'note' => $request->note,
        ]);

        return response()->json([
            'success' => true,
            'message' => '운행기록이 등록되었습니다.',
            'data' => $log,
        ]);
    }

    public function update(Request $request, int $id): JsonResponse
    {
        $tenantId = session('tenant_id', 1);

        $log = VehicleLog::where('tenant_id', $tenantId)->findOrFail($id);

        $request->validate([
            'log_date' => 'required|date',
            'driver_name' => 'required|string|max:50',
            'trip_type' => 'required|in:commute_to,commute_from,business,personal',
            'distance_km' => 'required|integer|min:0',
        ]);

        $log->update([
            'log_date' => $request->log_date,
            'department' => $request->department,
            'driver_name' => $request->driver_name,
            'trip_type' => $request->trip_type,
            'departure_type' => $request->departure_type,
            'departure_name' => $request->departure_name,
            'departure_address' => $request->departure_address,
            'arrival_type' => $request->arrival_type,
            'arrival_name' => $request->arrival_name,
            'arrival_address' => $request->arrival_address,
            'distance_km' => $request->distance_km,
            'note' => $request->note,
        ]);

        return response()->json([
            'success' => true,
            'message' => '운행기록이 수정되었습니다.',
            'data' => $log,
        ]);
    }

    public function destroy(int $id): JsonResponse
    {
        $tenantId = session('tenant_id', 1);

        $log = VehicleLog::where('tenant_id', $tenantId)->findOrFail($id);
        $log->delete();

        return response()->json([
            'success' => true,
            'message' => '운행기록이 삭제되었습니다.',
        ]);
    }

    public function export(Request $request): StreamedResponse
    {
        $tenantId = session('tenant_id', 1);

        $request->validate([
            'vehicle_id' => 'required|integer',
            'start_date' => 'required|date',
            'end_date' => 'required|date|after_or_equal:start_date',
        ]);

        $vehicleId = $request->vehicle_id;
        $startDate = $request->start_date;
        $endDate = $request->end_date;

        $vehicle = CorporateVehicle::where('tenant_id', $tenantId)
            ->findOrFail($vehicleId);

        $logs = VehicleLog::where('tenant_id', $tenantId)
            ->where('vehicle_id', $vehicleId)
            ->whereBetween('log_date', [$startDate, $endDate])
            ->orderBy('log_date')
            ->orderBy('id')
            ->get();

        $spreadsheet = new Spreadsheet();
        $sheet = $spreadsheet->getActiveSheet();
        $sheet->setTitle('운행기록부');

        // 기본 정보
        $sheet->setCellValue('A1', '업무용승용차 운행기록부');
        $sheet->setCellValue('A3', '차량번호');
        $sheet->setCellValue('B3', $vehicle->plate_number);
        $sheet->setCellValue('C3', '차종');
        $sheet->setCellValue('D3', $vehicle->model);
        $sheet->setCellValue('E3', '구분');
        $sheet->setCellValue('F3', $this->getOwnershipTypeLabel($vehicle->ownership_type));
        $sheet->setCellValue('A4', '조회기간');
        $sheet->setCellValue('B4', sprintf('%s ~ %s', $startDate, $endDate));

        // 헤더
        $headers = ['일자', '부서', '성명', '구분', '출발지', '도착지', '주행km', '비고'];
        $col = 'A';
        foreach ($headers as $header) {
            $sheet->setCellValue($col . '6', $header);
            $col++;
        }

        // 데이터
        $row = 7;
        $tripTypeLabels = VehicleLog::tripTypeLabels();

        foreach ($logs as $log) {
            $sheet->setCellValue('A' . $row, $log->log_date->format('Y-m-d'));
            $sheet->setCellValue('B' . $row, $log->department ?? '');
            $sheet->setCellValue('C' . $row, $log->driver_name);
            $sheet->setCellValue('D' . $row, $tripTypeLabels[$log->trip_type] ?? $log->trip_type);
            $sheet->setCellValue('E' . $row, $log->departure_name ?? '');
            $sheet->setCellValue('F' . $row, $log->arrival_name ?? '');
            $sheet->setCellValue('G' . $row, $log->distance_km);
            $sheet->setCellValue('H' . $row, $log->note ?? '');
            $row++;
        }

        // 합계
        $businessKm = $logs->whereIn('trip_type', ['commute_to', 'commute_from', 'business'])->sum('distance_km');
        $personalKm = $logs->where('trip_type', 'personal')->sum('distance_km');
        $totalKm = $logs->sum('distance_km');

        $sheet->setCellValue('A' . $row, '합계');
        $sheet->setCellValue('F' . $row, '업무용: ' . number_format($businessKm) . 'km');
        $sheet->setCellValue('G' . $row, number_format($totalKm));
        $sheet->setCellValue('H' . $row, '비업무: ' . number_format($personalKm) . 'km');

        $filename = sprintf('운행기록부_%s_%s_%s.xlsx', $vehicle->plate_number, $startDate, $endDate);

        return response()->streamDownload(function () use ($spreadsheet) {
            $writer = new Xlsx($spreadsheet);
            $writer->save('php://output');
        }, $filename, [
            'Content-Type' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
        ]);
    }

    private function getOwnershipTypeLabel(string $type): string
    {
        return match ($type) {
            'corporate' => '회사',
            'rent' => '렌트',
            'lease' => '리스',
            default => $type,
        };
    }
}