<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Models\Presensi;
use Illuminate\Support\Facades\Validator;
use App\Models\Cuti;
use Carbon\Carbon;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Storage;

class PresensiController extends Controller
{
    public function store(Request $request)
    {
        try {
            $request->validate([
                'status' => 'required',
                'keterangan' => 'required',
                'photo' => 'required_if:status,Hadir',
                'latitude' => 'required_if:status,Hadir',
                'longitude' => 'required_if:status,Hadir',
                'clock_type' => 'required|in:in,out'
            ]);

            $user = Auth::user();
            $now = Carbon::now();
            
            // Cek apakah sudah presensi hari ini untuk clock type yang sama
            $existingPresensi = Presensi::where('user_id', $user->id)
                ->whereDate('created_at', $now->toDateString())
                ->where('clock_type', $request->clock_type)
                ->first();

            if ($existingPresensi) {
                return response()->json([
                    'success' => false,
                    'message' => 'Anda sudah melakukan presensi ' . 
                        ($request->clock_type == 'in' ? 'masuk' : 'keluar') . 
                        ' hari ini'
                ], 400);
            }

            // Set status terlambat jika clock in setelah jam 8 pagi
            $status = $request->status;
            if ($request->clock_type == 'in' && $status == 'Hadir') {
                $batasWaktu = Carbon::createFromTime(8, 0, 0); // 08:00:00
                if ($now->greaterThan($batasWaktu)) {
                    $status = 'Terlambat';
                }
            }

            $data = [
                'user_id' => $user->id,
                'status' => $status,
                'keterangan' => $request->keterangan,
                'clock_type' => $request->clock_type
            ];

            // Jika status Hadir, simpan foto dan lokasi
            if ($request->status == 'Hadir') {
                if ($request->hasFile('photo')) {
                    $photo = $request->file('photo');
                    $filename = time() . '_' . $user->id . '.' . $photo->getClientOriginalExtension();
                    $path = $photo->storeAs('public/presensi', $filename);
                    $data['foto'] = $filename;
                }

                $data['latitude'] = $request->latitude;
                $data['longitude'] = $request->longitude;
            }

            $presensi = Presensi::create($data);

            return response()->json([
                'success' => true,
                'message' => 'Presensi berhasil disimpan',
                'data' => $presensi
            ]);

        } catch (\Exception $e) {
            return response()->json([
                'success' => false,
                'message' => 'Error: ' . $e->getMessage()
            ], 500);
        }
    }

    public function getPresensi(Request $request)
    {
        try {
            $user = auth()->user();
            if (!$user) {
                return response()->json([
                    'success' => false,
                    'message' => 'Unauthorized'
                ], 401);
            }
            
            $query = Presensi::where('user_id', $user->id);
            
            // Filter by date
            if ($request->has('date')) {
                $query->whereDate('created_at', $request->date);
            }
            
            // Filter by status
            if ($request->has('status')) {
                $query->where('status', $request->status);
            }
            
            // Filter by clock_type
            if ($request->has('clock_type')) {
                $query->where('clock_type', $request->clock_type);
            }
            
            // Sort by latest first
            $presensi = $query->orderBy('created_at', 'desc')->get();

            return response()->json([
                'success' => true,
                'message' => 'Data presensi berhasil diambil',
                'data' => $presensi
            ], 200);

        } catch (\Exception $e) {
            return response()->json([
                'success' => false,
                'message' => 'Error: ' . $e->getMessage()
            ], 500);
        }
    }

    public function getDashboardStats()
    {
        try {
            $user = Auth::user();
            $currentMonth = Carbon::now()->month;
            $currentYear = Carbon::now()->year;

            // Hitung jumlah kehadiran bulan ini
            $attendanceCount = Presensi::where('user_id', $user->id)
                ->whereMonth('created_at', $currentMonth)
                ->whereYear('created_at', $currentYear)
                ->where('status', 'Hadir')
                ->count();

            // Hitung sisa cuti
            $totalLeaveTaken = Cuti::where('user_id', $user->id)
                ->where('status', 'Disetujui')
                ->whereYear('tanggal_mulai', $currentYear)
                ->count();

            // Asumsi total cuti per tahun adalah 12 hari
            $remainingLeave = 12 - $totalLeaveTaken;
            $remainingLeave = max(0, $remainingLeave); // Pastikan tidak negatif

            return response()->json([
                'success' => true,
                'data' => [
                    'attendance_count' => $attendanceCount,
                    'remaining_leave' => $remainingLeave
                ]
            ]);

        } catch (\Exception $e) {
            return response()->json([
                'success' => false,
                'message' => 'Gagal mengambil data statistik: ' . $e->getMessage()
            ], 500);
        }
    }

    public function getMonthlyTotal()
    {
        try {
            $total = Presensi::whereMonth('created_at', Carbon::now()->month)
                ->whereYear('created_at', Carbon::now()->year)
                ->where('status', 'Hadir')
                ->where('clock_type', 'in')
                ->count();

            return response()->json([
                'success' => true,
                'data' => [
                    'total' => $total
                ]
            ]);
        } catch (\Exception $e) {
            return response()->json([
                'success' => false,
                'message' => 'Error: ' . $e->getMessage()
            ], 500);
        }
    }

    public function getStats()
    {
        try {
            $user = auth()->user();
            if (!$user) {
                return response()->json([
                    'success' => false,
                    'message' => 'Unauthorized'
                ], 401);
            }

            // Hitung total presensi bulan ini untuk user yang login
            $totalPresensi = Presensi::where('user_id', $user->id)
                ->whereMonth('created_at', now()->month)
                ->whereYear('created_at', now()->year)
                ->where('clock_type', 'in') // Hanya hitung clock in
                ->count();

            Log::info('Presensi stats for user ' . $user->id . ':', ['total' => $totalPresensi]);

            return response()->json([
                'success' => true,
                'message' => 'Data statistik presensi berhasil diambil',
                'data' => [
                    'total_presensi' => $totalPresensi
                ]
            ], 200);

        } catch (\Exception $e) {
            Log::error('Error getting presensi stats: ' . $e->getMessage());
            return response()->json([
                'success' => false,
                'message' => 'Error: ' . $e->getMessage()
            ], 500);
        }
    }
}