<?php

namespace App\Http\Controllers;

use App\Models\Attachment;
use App\Models\MasterTask;
use App\Models\SubTask;
use App\Models\Team;
use App\Models\Timesheet;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;

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

        $parameters['user_id'] = ( $parameters['employee_id'] ?? null );

        $validator = Validator::make($request->all(), [
            'start' => 'required',
            'end' => 'required',
        ]);

        $validator->after(function ($validator) use ($parameters) {

            if ( !isset($parameters['employee_id']) && !isset($parameters['team_id'])) {
                $validator->errors()->add(
                    'error', 'You must provide either employee_id or team_id.'
                );
            }
        });

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

        if (isset($parameters['team_id'])) {
            $subtasks = SubTask::whereHas('mastertask', function ($query) use ($parameters) {
                $query->where('team_id', $parameters['team_id']);
            })->whereHas('timeblocks', function ($query) use ($parameters) {
                $query->where('start', '>=', $parameters['start']);
                $query->where('end', '<=', $parameters['end']);
            })->get();
        } else if (isset($parameters['user_id'])) {
            $subtasks = SubTask::where('user_id', $parameters['user_id'])->whereHas('timeblocks', function ($query) use ($parameters) {
                $query->where('start', '>=', $parameters['start']);
                $query->where('end', '<=', $parameters['end']);
            })->get();
        }

        return response()->json([
            'subtasks' => $subtasks
        ], 200);
    }

    public function store($mastertask_id, Request $request)
    {
        $validator = Validator::make($request->all(), [
            'data.employee_id' => 'required',
            'data.duration' => 'required',
        ]);

        // validacia, ci uz subtask pre tohto usera a mastertask neexistuje
        $validator->after(function ($validator) use ($mastertask_id, $request) {
            if (SubTask::where('master_task_id', $mastertask_id)->where('user_id', $request->all()['data']['employee_id'])->exists()) {
                $validator->errors()->add(
                    'data.employee_id', 'Sub task already exists for this employee and master task.'
                );
            }
        });

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

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

        $request->merge($data);

        $mastertask = MasterTask::find($mastertask_id);
        $subtask = $mastertask->subtasks()->create($request->all()['data']);

        // syncnutie timeblocks
        if (!empty($data['data']['timeblocks'])) {
            $subtask->syncTimeblocks($data['data']['timeblocks']);
        }

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

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

    // TODO zabezpecit, ze ked sa meni user, tak nech sa dvojmu nevlozia jeho vykazy
    public function update($id, Request $request)
    {
        $subtask = SubTask::find($id);

        $validator = Validator::make($request->all(), [
            'data.employee_id' => 'required',
            'data.duration' => 'required',
        ]);

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

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

        $request->merge($data);

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

        // syncnutie vykazu
        if (!empty($data['data']['timesheets'])) {
            $subtask->syncTimesheets($data['data']['timesheets']);
        }

        // syncnutie timeblocks
        if (!empty($data['data']['timeblocks'])) {
            $subtask->syncTimeblocks($data['data']['timeblocks']);
        }

        return response()->json([
            'message' => 'Subtask updated successfully',
            'subtask' => $subtask
        ]);
    }

    public function delete($id)
    {
        $subtask = SubTask::find($id);

        // ak existuje timesheet k subtasku, nemoze sa zmazat
        if ($subtask->timesheets()->exists()) {
            return response()->json([
                'message' => 'Cannot delete subtask with submitted timesheets.',
            ], 400);
        }

        $subtask->timeblocks()->delete();

        // TODO budu mat attachmenty?
        // $subtask->attachments()->delete();
        $subtask->delete();

        return response()->json([
            'message' => 'Subtask deleted successfully.',
            'subtask' => $subtask
        ]);
    }
}