<?php

namespace App\Models;

use Carbon\Carbon;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class SubTask extends Model
{
    use HasFactory;

    public $timestamps = true;
    public $guarded = ['id'];

    protected $casts = [
        'draft_data' => 'array',
    ];

    /**
     * Scope pre koncepty (drafty) - nezverejnené subtasky
     */
    public function scopeDraft($query)
    {
        return $query->where('is_draft', true);
    }

    /**
     * Scope pre publikované subtasky (nie drafty)
     */
    public function scopePublished($query)
    {
        return $query->where('is_draft', false);
    }

    public function mastertask()
    {
        return $this->belongsTo(MasterTask::class, 'master_task_id');
    }

    public function user()
    {
        return $this->belongsTo(User::class)->withTrashed();
    }

    public function timeblocks()
    {
        return $this->hasMany(Timeblock::class);
    }

    public function timesheets()
    {
        return $this->hasMany(Timesheet::class);
    }

    public function attachments()
    {
        return $this->hasMany(Attachment::class);
    }

    // syncnutie vykazu. ak array obsahuje NULL id, tak ho vytvori, ak obsahuje ID, tak ho upravi. ak sa v array nenachadza, tak ho zmaze z DB
    public function syncTimesheets(Array $timesheets)
    {
        // pripravenie array na upsert
        $timesheets = array_map(function($item) {
            $item['user_id'] = $item['employee_id'];
            unset($item['employee_id']);
            unset($item['timestamp']);
            $item['sub_task_id'] = $this->id;

            if (!$this->id) {
                $item['created_at'] = Carbon::now();
                $item['updated_at'] = Carbon::now();
            }
            return $item;
        }, $timesheets);

        // zmazanie vykazov, ktore neboli poslane z frontendu
        $this->timesheets()->whereNotIn('id', collect($timesheets)->pluck('id')->filter())->delete();

        $this->timesheets()->upsert($timesheets, ['id']);

        // kedze updatujem cez upsert, tak sa neaktualizuje updated_at. preto ho musim updatnut manualne
        $this->touch();
    }

    /**
     * Synchronizácia timeblocks - aktualizuje existujúce, vytvorí nové, zmaže nepoužité
     */
    public function syncTimeblocks(Array $timeblocks)
    {
        if (empty($timeblocks)) {
            return $this->timeblocks()->delete();
        }

        // Získame ID existujúcich timeblocks tohto subtasku
        $existingIds = $this->timeblocks()->pluck('id')->toArray();

        // Rozdelíme na existujúce (s ID) a nové (bez ID alebo s neexistujúcim ID)
        $timeblocksToUpdate = [];
        $timeblocksToCreate = [];
        $receivedIds = [];

        foreach ($timeblocks as $item) {
            $item['sub_task_id'] = $this->id;

            // Ak má ID a toto ID existuje v našich timeblocks, aktualizujeme
            if (isset($item['id']) && in_array($item['id'], $existingIds)) {
                $timeblocksToUpdate[] = $item;
                $receivedIds[] = $item['id'];
            } else {
                // Nový timeblock - odstránime ID aby sa vytvoril nový záznam
                unset($item['id']);
                $timeblocksToCreate[] = $item;
            }
        }

        // Zmažeme timeblocks, ktoré neboli poslané z frontendu
        $this->timeblocks()->whereNotIn('id', $receivedIds)->delete();

        // Aktualizujeme existujúce
        foreach ($timeblocksToUpdate as $timeblock) {
            $this->timeblocks()->where('id', $timeblock['id'])->update([
                'start' => $timeblock['start'],
                'end' => $timeblock['end'],
            ]);
        }

        // Vytvoríme nové
        if (! empty($timeblocksToCreate)) {
            $this->timeblocks()->createMany($timeblocksToCreate);
        }
    }

    /**
     * Vytvorenie nových timeblocks - pre použitie pri publikovaní draftu
     */
    public function createTimeblocks(Array $timeblocks)
    {
        if (empty($timeblocks)) {
            return;
        }

        $timeblocksToCreate = array_map(function($item) {
            // Odstránime ID a sub_task_id pre istotu
            unset($item['id']);
            unset($item['sub_task_id']);
            return [
                'start' => $item['start'],
                'end' => $item['end'],
                'is_finished' => $item['is_finished'] ?? false,
            ];
        }, $timeblocks);

        $this->timeblocks()->createMany($timeblocksToCreate);
    }

    public function deleteAttachments()
    {
        foreach ( $this->attachments as $attachment ) {
            $attachment->deleteFromS3();
        }

        $this->attachments()->delete();

        return true;
    }
}