<?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 {
            // Log semua data yang diterima untuk debugging
            Log::info('Presensi store request:', $request->all());
            
            $request->validate([
                'status' => 'required',
                'keterangan' => 'required',
                'photo' => 'required_if:status,Hadir,Masuk',
                'latitude' => 'required_if:status,Hadir,Masuk',
                'longitude' => 'required_if:status,Hadir,Masuk',
                '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;
            
            // Konversi status 'Masuk' menjadi 'Hadir'
            if ($status == 'Masuk') {
                $status = 'Hadir';
            }
            
            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,
                'file_pdf' => null // Pastikan file_pdf kosong untuk presensi biasa
            ];

            // Jika status Hadir atau Masuk, simpan foto dan lokasi
            if ($request->status == 'Hadir' || $request->status == 'Masuk') {
                if ($request->hasFile('photo')) {
                    Log::info('Photo file received', ['filename' => $request->file('photo')->getClientOriginalName()]);
                    $photo = $request->file('photo');
                    $filename = 'presensi_' . time() . '_' . $user->id . '.' . $photo->getClientOriginalExtension();
                    $path = $photo->storeAs('public/presensi', $filename);
                    $data['foto'] = $filename;
                } else {
                    Log::warning('No photo file received for status: ' . $request->status);
                }

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

            Log::info('Saving presensi data:', $data);
            $presensi = Presensi::create($data);

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

        } catch (\Exception $e) {
            Log::error('Error in presensi store: ' . $e->getMessage());
            Log::error('Stack trace: ' . $e->getTraceAsString());
            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
            // Hanya menghitung status 'Hadir' dan 'Terlambat', tidak termasuk 'Izin' dan 'Sakit'
            $attendanceCount = Presensi::where('user_id', $user->id)
                ->whereMonth('created_at', $currentMonth)
                ->whereYear('created_at', $currentYear)
                ->whereIn('status', ['Hadir', 'Terlambat'])
                ->where('clock_type', 'in')
                ->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' => [
                    'total_presensi' => $attendanceCount,
                    'remaining_leave' => $remainingLeave,
                    'total_cuti' => $totalLeaveTaken
                ]
            ]);

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

    public function getMonthlyTotal()
    {
        try {
            $user = Auth::user();
            if (!$user) {
                return response()->json([
                    'success' => false,
                    'message' => 'Unauthorized'
                ], 401);
            }
            
            $total = Presensi::where('user_id', $user->id)
                ->whereMonth('created_at', Carbon::now()->month)
                ->whereYear('created_at', Carbon::now()->year)
                ->whereIn('status', ['Hadir', 'Terlambat'])
                ->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
            // Hanya menghitung kehadiran (Hadir/Terlambat), tidak termasuk Izin dan Sakit
            $totalPresensi = Presensi::where('user_id', $user->id)
                ->whereMonth('created_at', now()->month)
                ->whereYear('created_at', now()->year)
                ->whereIn('status', ['Hadir', 'Terlambat'])
                ->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);
        }
    }

    public function storeIzin(Request $request)
    {
        try {
            $request->validate([
                'status' => 'required|in:Izin,Sakit',
                'keterangan' => 'required',
                'file' => 'required|mimes:pdf,jpg,jpeg,png|max:5120', // Max 5MB
            ]);

            $user = Auth::user();
            $now = Carbon::now();
            
            // Check if user already has an Izin or Sakit entry for today
            $existingLeave = Presensi::where('user_id', $user->id)
                ->whereDate('created_at', $now->toDateString())
                ->whereIn('status', ['Izin', 'Sakit'])
                ->first();
                
            if ($existingLeave) {
                return response()->json([
                    'success' => false,
                    'message' => 'Anda sudah mengajukan ' . $existingLeave->status . ' untuk hari ini'
                ], 400);
            }
            
            // Check if user already has a regular attendance for today
            $existingAttendance = Presensi::where('user_id', $user->id)
                ->whereDate('created_at', $now->toDateString())
                ->whereIn('status', ['Hadir', 'Terlambat'])
                ->first();
                
            if ($existingAttendance) {
                return response()->json([
                    'success' => false,
                    'message' => 'Anda sudah melakukan presensi hari ini, tidak dapat mengajukan ' . $request->status
                ], 400);
            }
            
            $data = [
                'user_id' => $user->id,
                'status' => $request->status,
                'keterangan' => $request->keterangan,
                'clock_type' => null, // Izin tidak perlu clock type
                'latitude' => null,
                'longitude' => null,
                'foto' => null // Pastikan foto kosong untuk pengajuan izin
            ];

            // Upload dan simpan file
            if ($request->hasFile('file')) {
                $file = $request->file('file');
                $extension = $file->getClientOriginalExtension();
                $filename = 'izin_' . time() . '_' . $user->id . '.' . $extension;
                
                // Simpan file ke storage
                $path = $file->storeAs('public/presensi', $filename);
                
                // Simpan semua jenis file di kolom file_pdf untuk pengajuan izin
                $data['file_pdf'] = $filename;
            }

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

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

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