<?php

namespace App\Services\Intranet;

use App\Models\Blocker;
use Carbon\Carbon;
use Illuminate\Support\Collection;

class IntranetService
{
    private Api $api;

    public function __construct()
    {
        $this->api = new Api();
    }

    public function syncVacations()
    {
        $intranetVacations = Vacation::fromDate(Carbon::yesterday()->toDateString());

        // toto sa pouziva pre delete starych dovoleniek. je to najstarsi datum, ktory mame v produkcnej DB. ak by sme ho tam nemali, API by nevratila stare dovolenky a povazovalo by sa to za vymazanu dovolenku a tym padom by sa to chybne odstranilo z nasej DB
        $intranetVacationsFromPast = Vacation::fromDate('2023-02-08');

        $dbVacations = Blocker::whereIn('type', ['vacation', 'home_office', 'free_day'])->get();

        $this->insertVacationsFromIntranet($intranetVacations, $dbVacations);

        $this->checkIfVacationsGotAprroved($intranetVacations);

        $this->deleteVacations($intranetVacationsFromPast, $dbVacations);
    }

    private function insertVacationsFromIntranet(Collection $intranetVacations, Collection $dbVacations)
    {
        $vacationsToSkip = $dbVacations->pluck('intranet_id')->intersect($intranetVacations->pluck('intranet_id'));

        $intranetVacationsToInsert = $intranetVacations->reject(function ($item) use ($vacationsToSkip) {
            return $vacationsToSkip->contains($item->intranet_id);
        })->map(function ($item) {
            $arrayToInsert = $item->toArray();

            $arrayToInsert['created_at'] = Carbon::now()->toDateTimeString();
            $arrayToInsert['updated_at'] = Carbon::now()->toDateTimeString();

            return $arrayToInsert;
        });

        Blocker::insert($intranetVacationsToInsert->toArray());
    }

    private function checkIfVacationsGotAprroved(Collection $intranetVacations)
    {
        $notApprovedDBVacations = Blocker::whereIn('type', ['vacation', 'home_office', 'free_day'])->where('approved',
            false)->get();

        // filter vacations from intranet with approved parameter to be true
        $approvedVacations = $intranetVacations->filter(function ($item) {
            return $item->approved === true;
        });

        $vacationsToApprove = $approvedVacations->filter(function ($item) use ($notApprovedDBVacations) {
            return $notApprovedDBVacations->contains('intranet_id', $item->intranet_id);
        });

        // get intranet_id from vacations to approve and update them in db
        $vacationsToApproveIds = $vacationsToApprove->map(function ($item) {
            return $item->intranet_id;
        });

        // mass update in DB
        Blocker::whereIn('intranet_id', $vacationsToApproveIds)->update(['approved' => true]);
    }

    private function deleteVacations(Collection $intranetVacations, Collection $dbVacations)
    {
        $vacationsToDelete = $dbVacations->reject(function ($item) use ($intranetVacations) {
            return $intranetVacations->pluck('intranet_id')->contains($item->intranet_id);
        });

        $vacationsToDeleteIds = $vacationsToDelete->pluck('id');

        Blocker::destroy($vacationsToDeleteIds->toArray());
    }
}