<?php

namespace App\Http\Controllers;

namespace App\Http\Controllers\API\v1;

use App\Http\Controllers\Controller;
use App\Models\EmployeeWfh;
use App\Models\SystemSetting;
use App\Models\User;
use App\Notifications\Wfh;
use Exception;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Validator;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Notification;
use Illuminate\Support\Facades\Storage;
use Illuminate\Validation\Rule;
use PHPUnit\Event\Code\Throwable;
use Illuminate\Support\Str;

class EmployeeWfhController extends Controller
{
    
    /**
     * Display a listing of the resource.
     */
    public function index(Request $request)
    {
        //
        $employee = Auth::user();

        $keyword = $request->input('keyword', '');
        $perPage = $request->input('per_page',PHP_INT_MAX);
        $sortBy = $request->input('sortBy', '');
        $sortType = $request->input('sortType', '');
        $data = EmployeeWfh::with([
            'recommending' => fn($recommending) => $recommending->select('employee_id', 'asa_user_id', 'firstname', 'lastname'),
            'approving'=> fn($approving) => $approving->select('employee_id', 'asa_user_id', 'firstname', 'lastname'),
            ])
            ->select(
                'id', 
                'employee_id', 
                'company_id', 
                'dealer_id', 
                'date',
                'hours',
                'attachment', 
                'description', 
                'denied_reason', 
                'status', 
                'validated_by',
                'validated_at',
                'validated',
                'deferred_reason',
                'recommending_id', 
                'allow_higher_approval', 
                'approver_id', 
                'approved_at',
                'recommended_at', 
                'created_at',
                'posted'
            )
            ->where(function ($query) use ($keyword) {
            $keyword = str_replace(" ", "%", $keyword);
            // $query->where('name', 'like', '%' . $keyword . '%');
        });

        if($employee->roles[0]['group_id'] != 1){
            $data->where(['employee_id' => $employee->employee_id]);
        }

        if (!empty($sortBy) && !empty($sortType)) {
            $data = $data->orderBy($sortBy, $sortType);
        }

        if ($request->date_created) {
            $dates = explode(' to ', $request->date_created);
            if (count($dates) == 2) {
                $data = $data->whereBetween('created_at', [$dates[0], $dates[1]]);
            }
        }

        if ($request->range) {
            $dates = explode(' to ', $request->range); 
            if (count($dates) == 2) {
                $data = $data->whereBetween('date', [$dates[0], $dates[1]]);
            } else if ((count($dates) == 1)){
                $data = $data->where('date', $dates[0]);
            }
        }
        
        if ($request->status && is_array($request->status)) {
            $data = $data->where(function ($query) use ($request) {
                if (in_array('pending', $request->status)) {
                    $query->orWhere('status', 0);
                }
        
                if (in_array('validated', $request->status)) {
                    $query->orWhere(function ($q) {
                        $q->where('status', 2)->where('validated', 1);
                    });
                }
        
                if (in_array('denied', $request->status)) {
                    $query->orWhere('status', 99)
                        ->orWhere(function ($q) {
                            $q->where('status', 2)->where('validated', 99);
                        });
                }
        
                if (in_array('for_validation', $request->status)) {
                    $query->orWhere(function ($q) {
                        $q->where('status', 2)->where('validated', 0);
                    });
                }
            });
        }  
        
        $data = $data->paginate($perPage);
        return response()->json($data);
    }

    public function getWfhList(Request $request)
    {
        //
        $employee = Auth::user();

        $keyword = $request->input('keyword', '');
        $perPage = $request->input('per_page',PHP_INT_MAX);
        $sortBy = $request->input('sortBy', '');
        $sortType = $request->input('sortType', '');
        $dealership_id = $request->input('dealership', null);

        $data = EmployeeWfh::with([
            'recommending' => fn($recommending) => $recommending->select('employee_id', 'asa_user_id', 'firstname', 'lastname'),
            'approving'=> fn($approving) => $approving->select('employee_id', 'asa_user_id', 'firstname', 'lastname'),
            'employee'=> fn($employee) => $employee->select('employee_id', 'firstname', 'lastname'),
            ])
            ->select(
                'id', 
                'employee_id', 
                'company_id', 
                'dealer_id', 
                'date',
                'hours',
                'attachment', 
                'description', 
                'denied_reason', 
                'status', 
                'validated_by',
                'validated_at',
                'validated',
                'deferred_reason',
                'recommending_id', 
                'allow_higher_approval', 
                'approver_id', 
                'approved_at',
                'recommended_at', 
                'created_at',
                'posted'
            )
            ->where('status', '>=',2)
            ->where(function ($query) use ($keyword) {
            $keyword = str_replace(" ", "%", $keyword);
            // $query->where('name', 'like', '%' . $keyword . '%');
        });

        if($dealership_id) $data = $data->where('dealer_id', $dealership_id);
        
        if (!$request->date_created && !$request->range && !$request->status) {
            $data = $data->whereDate('created_at', '>=', now()->subDays(30));
        }
        
        if ($request->date_created) {
            $dates = explode(' to ', $request->date_created); // Split into start and end date
            if (count($dates) == 2) {
                $data = $data->whereBetween('created_at', [$dates[0], $dates[1]]);
            }
        }
        
        if ($request->range) {
            $dates = explode(' to ', $request->range); // Split into start and end date
            if (count($dates) == 2) {
                $data = $data->whereBetween('date', [$dates[0], $dates[1]]);
            }
        }
        
        if ($request->status && is_array($request->status)) {
            $data = $data->where(function ($query) use ($request) {
                if (in_array('pending', $request->status)) {
                    $query->orWhere('status', 0);
                }
        
                if (in_array('validated', $request->status)) {
                    $query->orWhere(function ($q) {
                        $q->where('status', 2)->where('validated', 1);
                    });
                }
        
                if (in_array('denied', $request->status)) {
                    $query->orWhere('status', 99)
                        ->orWhere(function ($q) {
                            $q->where('status', 2)->where('validated', 99);
                        });
                }
        
                if (in_array('for_validation', $request->status)) {
                    $query->orWhere(function ($q) {
                        $q->where('status', '>=', 2)->where('validated', 0);
                    });
                }
            });
        }   
        
        $data = $data->paginate(500);

        return response()->json($data);
    }

    public function checkIfWfh(Request $request){
        $activeWfh = SystemSetting::find(5);

        // dd($activeWfh);
        if ($activeWfh && $activeWfh->value) {
            return DB::table('employee_wfhs')
                ->where('employee_id', $request->employee_id)
                ->whereDate('date', now())
                ->where('enabled', 1)
                ->where('status', '>=', 2)
                ->count();
        }

        return 0;
    }

    public function store(Request $request)
    {
        // dd($request->all());

        $user = Auth::user();
        
        $validator = Validator::make($request->all(), [
            'date' => "required|date",
            'hours' => "required",
        ]);

        /** If validation fails return with error message */
        if ($validator->fails()) {
            $errors = $validator->errors();
            $first = $errors->getMessages();
            return response()->json([
                'status'  => false,
                'message' => (reset($first))[0],
                'errors'  => $errors
            ], Response::HTTP_UNPROCESSABLE_ENTITY);
        }

        try {
            $allow_higher_approval = ($request->allow_higher_approval && $request->allow_higher_approval !== 'null' && $request->allow_higher_approval !== 'false' && trim($request->allow_higher_approval) !== '' ? 1 : 0);
                
            $attachmentName = $this->handleAttachment($request);

            $Status = EmployeeWfh::create([
                'employee_id' => $user->employee_id,
                'company_id' => $user->employees->company_id,
                'dealer_id' => $user->employees->dealer_id,
                'date' => $request->date,
                'hours' => $request->hours,
                'description' => $request->description,
                'attachment' => $attachmentName,
                'recommending_id' => $request->recommending_id,
                'allow_higher_approval' => $allow_higher_approval,
                'approver_id' => $request->approver_id,
                'status' => 0,
            ]);

            DB::connection()->commit();

            // Load the relationships
            $Status->load(['employee']);
            
            $email_to = $this->getEmployeeEmailData($request->recommending_id);

            if($email_to != ''){
                Notification::send($email_to, new Wfh($Status));
            }

            return response()->json([
                'status'  => true,
                'message' => 'Saved successfully!',
                'data'    => $Status
            ],201);

        } catch (Throwable $e) {

            DB::connection()->rollback();
            return response()->json([
                'status'  => false,
                'message' => 'Unable to process request. Please try again.',
                'data'    => $e->getMessage()
            ]);
        }
    }

    public function handleAttachment(Request $request)
    {
        if ($request->hasFile('attachment')) {
            $image = $request->file('attachment');
            $attachmentName = time() . '_' . $image->getClientOriginalName();
            $path = "employee-wfh/" . $attachmentName;
            if (Storage::disk('local')->put($path, file_get_contents($image))) {
                return $attachmentName;
            }
            throw new Exception('Unable to process attachment.');
        }
        return '';
    }

    public function update(Request $request)
    {
        // dd($request->all());
        $id = $request->id;
        $data = EmployeeWfh::where('id', $id)->first();
        $user = Auth::user();
    
        $validator = Validator::make($request->all(), [
            'date' => "required|date",
            'hours' => "required",
            'attachments.*' => 'file|max:10240', // Validate each file in attachments array
        ]);
        
        /** If validation fails return with error message */
        if ($validator->fails()) {
            $errors = $validator->errors();
            $first = $errors->getMessages();
            return response()->json([
                'status'  => false,
                'message' => (reset($first))[0],
                'errors'  => $errors
            ], Response::HTTP_UNPROCESSABLE_ENTITY);
        }

        // Handle multiple attachments
        $attachment_names = [];
        $old_attachments = $data->attachments ? json_decode($data->attachments, true) : [];
        
        // Delete old files if new files are uploaded
        if($request->hasFile('attachments')) {
            // Delete all old attachments
            if(!empty($old_attachments)) {
                foreach($old_attachments as $old_attachment) {
                    $old_file_path = 'employee-wfh/' . $old_attachment;
                    if(Storage::exists($old_file_path)) {
                        Storage::delete($old_file_path);
                    }
                }
            }
            
            // Process new attachments
            foreach($request->file('attachments') as $file) {
                $attachment_name = time() . '_' . uniqid() . '_' . $file->getClientOriginalName();
                $path = "employee-wfh/" . $attachment_name;
                
                if(!Storage::disk('local')->put($path, file_get_contents($file))) {
                    return response()->json(['message'=> "Failed to upload attachment: " . $file->getClientOriginalName()], 304);
                }
                
                $attachment_names[] = $attachment_name;
            }
        } else {
            // Keep old attachments if no new files uploaded
            $attachment_names = $old_attachments;
        }

        DB::connection()->beginTransaction();
        try {
            $allow_higher_approval = ($request->allow_higher_approval && $request->allow_higher_approval !== 'null' && $request->allow_higher_approval !== 'false' && trim($request->allow_higher_approval) !== '' ? 1 : 0);
        
            $data->employee_id = $user->employee_id;
            $data->date = $request->date;
            $data->hours = $request->hours;
            $data->description = $request->description;
            $data->allow_higher_approval = $allow_higher_approval;
            $data->attachment = json_encode($attachment_names); // Store as JSON array
            $data->status = $request->status;
            $data->save();
        
            DB::connection()->commit();
            return response()->json([
                'status'  => true,
                'message' => 'Saved successfully!',
                'data'    => $data
            ], 201);
        } catch (Throwable $e) {
            DB::connection()->rollback();
            return response()->json([
                'status'  => false,
                'message' => 'Unable to process request. Please try again.',
                'data'    => $e->getMessage()
            ]);
        }
    }

    public function destroy(int $id)
    {
        $data = EmployeeWfh::find($id);
        if(!$data)
        {
            return response()->json(['message' => "Record not found!"],204);
        }
        DB::connection()->beginTransaction();
        $data->delete();
        DB::connection()->commit();
        return response()->json(['message' => "Record successfully deleted!"], 201);
    }

    public function removeAttachment(Request $request)
    {
        $id = $request->id;
        $attachment = $request->attachment;

        $data = EmployeeWfh::where('id', $id)->first();

        $data->attachment = NULL;

        $data->save();

        DB::connection()->commit();
        
        $attachment_file_path = 'employee-wfh/' . $request->attachment;
        if(Storage::exists($attachment_file_path))
        {
            Storage::delete($attachment_file_path);
        }

        return response()->json([
            'status'  => true,
            'message' => 'Saved successfully!',
            'data'    => $data
        ],201);
    }

    public function getEmployeeEmailData($id){
        return User::where('employee_id', '=', $id)->first();
    }
}
