<?php

namespace App\Http\Controllers;

use App\Http\Resources\MasterTaskResource;
use App\Http\Resources\MasterTaskSimpleResource;
use App\Models\Attachment;
use App\Models\MasterTask;
use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;

class MasterTaskController extends Controller
{
    public function index(Request $request)
    {
        // get query parameter from request
        $parameters = $request->query();


        $mastertasks = MasterTask::select('*');

        // filtrovanie na zaklade parametrov
        foreach ($parameters as $field => $value) {
            if ( ! $value) {
                continue;
            }

            switch ($field) {
                // deadline riesim, aby zobrazovalo aj mastertasky, ktore zacali v minulosti (v porovnani s prave zobrazenym mesiacom) ale deadline maju po tomto mesiaci
                case 'month':
                    $mastertasks->whereDate('created_at', '<=',
                        $parameters['year'] . '-' . $parameters['month'] . '-31')
                                ->whereDate('deadline', '>=',
                                    $parameters['year'] . '-' . $parameters['month'] . '-01');


//                    $mastertasks->where('created_at', 'like', $parameters['year'] . '-' . $parameters['month'] . '-%')
//                                ->orWhereDate('deadline', '>=',
//                                    $parameters['year'] . '-' . $parameters['month'] . '-01');
                    break;

                case 'employee_id':
                    $mastertasks->whereHas('subtasks', function ($query) use ($value) {
                        $query->where('user_id', $value);
                    });
                    break;

                case 'team_id':
                    // ak je zadany team, tak najdem vsetkych userov, ktori su v tomto teame. potom najdem vsetky subtasky, ktore su priradene ludom v tomto teame. nevyhladavam na zaklade team_id v master_taskoch, pretoze toto je nepresne. Jandl chce vidiet tasky aj pre jednotlivcov v danom teame aj ked ten task nebol assignuty pod tymto teamom

                    $userIdArray = User::whereHas('teams', function ($query) use ($value) {
                        $query->where('team_id', $value);
                    })->get()->pluck('id')->toArray();

                    $mastertasks->whereHas('subtasks', function ($query) use ($userIdArray) {
                        $query->where('user_id', $userIdArray);
                    });
                    break;

                // vracia vsetky mastertasky v jednoduchom formate pre potreby dropdownu na FE (problem bol dlhy load time na zaciatku appky)
                case 'simple':
                    $mastertasks = MasterTask::select('id', 'title', 'project_id', 'color');
                    break;

                // year sa pouziva iba pri month
                case 'year':
                    break;

                default:
                    $mastertasks->where($field, $value);
                    break;
            }
        }

        $mastertasks = $mastertasks->get();

        return response()->json([
            'mastertasks' => (isset($parameters['simple'])) ? MasterTaskSimpleResource::collection($mastertasks) : MasterTaskResource::collection($mastertasks)
        ], 200);
    }

    public function store(Request $request)
    {
        $created_by = User::getUserIdFromBearerToken($request->bearerToken());

        $validator = Validator::make($request->all(), [
            'data.name'        => 'required',
            'data.description' => 'required',
            'data.duration'    => 'required',
            'data.deadline'    => 'required',
            'data.project_id'  => 'required',
            'data.employees'   => 'required',
        ]);

        if ($validator->fails()) {
            return response()->json($validator->errors(), 400);
        }

        // validacia na max 50MB size pre attachmenty. neslo dat do klasickeho laravel validation, tak je to separe
        if ($files = $request->file('data')) {
            foreach ($files['files'] as $file) {
                if ($file->getSize() > 52428800) {
                    return response()->json([
                        'files' => 'File size must be less than 50MB',
                    ], 400);
                }
            }
        }


        // upratanie requestu, pretoze frontend pouziva inu nomenklaturu fieldov ako appka
        $data['data']                   = $request->all()['data'];
        $data['data']['title']          = $request->all()['data']['name'];
        $data['data']['estimated_time'] = $request->all()['data']['duration'];
        $data['data']['created_by']     = $created_by;

        foreach ($data['data']['employees'] as $key => $employee) {
            $data['data']['employees'][$key]['user_id']        = $employee['id'];
            $data['data']['employees'][$key]['estimated_time'] = $employee['duration'];
            $data['data']['employees'][$key]['created_by']     = $created_by;
        }

        $request->merge($data);

        $mastertask = MasterTask::create($request->all()['data']);
        $mastertask->subtasks()->createMany($request->all()['data']['employees']);

        // upload attachmentu
        if ($request->file('data')) {
            $attachments = Attachment::uploadAttachmentsToS3($request->file('data')['files'], $mastertask);
            $mastertask->attachments()->createMany($attachments);
        }

        return response()->json([
            'message'    => 'Master Task created successfully',
            'mastertask' => $mastertask
        ], 201);
    }

    public function update($id, Request $request)
    {
        $created_by = User::getUserIdFromBearerToken($request->bearerToken());

        $validator = Validator::make($request->all(), [
            'data.name'        => 'required',
            'data.description' => 'required',
            'data.duration'    => 'required',
            'data.deadline'    => 'required',
            'data.project_id'  => 'required',
        ]);
        if ($validator->fails()) {
            return response()->json($validator->errors(), 400);
        }

        $mastertask = MasterTask::find($id);

        // ak je Master task v stave ukončený, nedovolime update. vynimkou je iba znovuotvorenie mastertasku
        if ($mastertask->is_finished == 1 && ( ! isset($request->all()['data']['is_finished']) || $request->all()['data']['is_finished'] == 1)) {
            return response()->json([
                'message' => 'Cannot update mastertask that is finished.',
            ], 400);
        }

        // znovuotvorenie mastertasku
        if ($mastertask->is_finished == 1 && isset($request->all()['data']['is_finished']) && $request->all()['data']['is_finished'] == 0) {
            $mastertask->is_finished = 0;
            $mastertask->save();

            return response()->json([
                'message'    => 'Master Task opened successfully',
                'mastertask' => $mastertask
            ]);
        }

        // ak chcem ukoncit mastertask, ktory nema ani jeden subtask, ktory ma natrackovany cas, tak to nedovolim
        if ($mastertask->is_finished == 0 && isset($request->all()['data']['is_finished']) && $request->all()['data']['is_finished'] == 1) {
            $atLeastOneSubtaskHasTimesheet = false;

            foreach ($mastertask->subtasks as $subtask) {
                if ($subtask->timesheets()->exists()) {
                    $atLeastOneSubtaskHasTimesheet = true;
                }
            }

            if ( ! $atLeastOneSubtaskHasTimesheet) {
                return response()->json([
                    'message' => 'Finishing mastertask is only possible where at least one subtask contains timesheet',
                ], 400);
            }

            $mastertask->is_finished = 1;
            $mastertask->save();

            return response()->json([
                'message'    => 'Master Task finished successfully',
                'mastertask' => $mastertask
            ]);
        }


        // validacia na max 50MB size pre attachmenty. neslo dat do klasickeho laravel validation, tak je to separe
        if ($files = $request->file('data')) {
            foreach ($files['files'] as $file) {
                if ($file->getSize() > 52428800) {
                    return response()->json([
                        'files' => 'File size must be less than 50MB',
                    ], 400);
                }
            }
        }

        // upratanie requestu, pretoze frontend pouziva inu nomenklaturu fieldov ako appka
        $data['data']                   = $request->all()['data'];
        $data['data']['title']          = $request->all()['data']['name'];
        $data['data']['estimated_time'] = $request->all()['data']['duration'];

        foreach ($data['data']['employees'] as $key => $employee) {
            $data['data']['employees'][$key]['user_id']        = $employee['id'];
            $data['data']['employees'][$key]['estimated_time'] = $employee['duration'];
            $data['data']['employees'][$key]['created_by']     = $created_by;
        }

        $request->merge($data);


        $mastertask->update($request->all()['data']);

        // upload attachmentu

        // TODO prerobit na upsert
        if ($request->file('data')) {
            $attachments = Attachment::uploadAttachmentsToS3($request->file('data')['files'], $mastertask);
            $mastertask->attachments()->createMany($attachments);
        }

        // pre existujuce subtasky
        // Pre sub tasky s natrackovaným časom  - Ukončia sa sub tasky pôvodného teamu
        // Pre sub tasky s nenatrackovaným časom budú tieto tasky zmazané
//        foreach ($mastertask->subtasks as $subtask) {
//            if ($subtask->timesheets()->exists()) {
//                $subtask->is_finished = 1;
//                $subtask->save();
//            } else {
//                $subtask->delete();
//            }
//        }

        // vytvorim subtasky nanovo
//        $mastertask->subtasks()->createMany($request->all()['data']['employees']);

        return response()->json([
            'message'    => 'Master Task updated successfully',
            'mastertask' => $mastertask
        ]);
    }

    public function delete($id)
    {
        $mastertask = MasterTask::find($id);

        // nedovolit zmazanie mastertasku, ak existuje aspon jeden subtask s timesheetom
        foreach ($mastertask->subtasks as $subtask) {
            if ($subtask->timesheets()->exists()) {
                return response()->json([
                    'message' => 'Cannot delete mastertask containing subtasks with submitted timesheets.',
                ], 400);
            }
        }

        $mastertask->deleteAttachments();

        foreach ($mastertask->subtasks as $subtask) {
            $subtask->timeblocks()->delete();
        }

        $mastertask->subtasks()->delete();

        $mastertask->delete();

        return response()->json([
            'message'    => 'Master Task deleted successfully.',
            'mastertask' => $mastertask
        ]);
    }

}