<?php

namespace App\KommaApp\Cases;

use Illuminate\Database\Eloquent\Collection;
use Illuminate\Support\Facades\Cache;
use App\KommaApp\Cases\Models\CaseModel;
use Illuminate\Support\Str;

class CaseService
{
    protected $cases;

    /**
     * Get all cases with current language
     *
     * @return Collection|false
     */
    public function all()
    {
        // Fetch all cases from the database
        if(empty($this->cases)) $this->cases = $this->cases();

        return $this->cases;
    }

    /**
     * Get a number of cases with current language
     *
     * @return Collection|false
     */
    public function other($except,$limit = null)
    {
        // Fetch all cases from the database
        if(empty($this->cases)) $this->cases = $this->cases();

        $cases = $this->cases->except($except);
        if($limit != null) $cases = $cases->take($limit);

        return $cases;
    }

    /**
     * Get cases with current language
     *
     * @return Collection|false
     */
    private function cases($limit = null, $except = null)
    {
        return Cache::rememberForever('cases',function() use ($limit,$except){

            // Get cases with translations
            $caseBuilder = CaseModel::with('translation', 'images')
                ->whereHas('translation')
                ->where('active',1)
                ->where('lft', '!=', 1)
                ->orderBy('lft','asc');
            // Take a limit of cases
            if( $limit != null) $caseBuilder->take($limit);
            // Skip a case
            if( $except != null) $caseBuilder->where('id','!=',$except);
            // Run query
            if( ! $cases = $caseBuilder->get()) return false;

            return $this->prepareCasesForUsage($cases);
        });
    }

    /**
     * Return a case by its slug
     *
     * @param $slug
     * @return CaseModel|false
     */
    public function caseBySlug($slug)
    {
        // Get case with translations
        if( ! $case = CaseModel::with('translation', 'images')
            ->whereHas('translation')
            ->first()) return false;

        // QnD: bind first translations directly to model
        $case->translation = $case->translations->first();

        return $case;
    }

    /**
     * Return a next and previous case
     *
     * @param CaseModel $case
     * @return false|Collection
     */
    public function adjacentCases(CaseModel $case)
    {
        // Get case with translations
        if( ! $cases = CaseModel::with('translation', 'images')
            ->whereHas('translation')
            ->where('active',1)
            ->where(function ($query) use ($case){
                $query->where('lft','=',($case->lft + 2))
                      ->orWhere('lft','=',$case->lft - 2);
            })
            ->where('lft', '!=', 1)
            ->orderBy('lft','asc')
            ->get()) return false;

        return $this->prepareCasesForUsage($cases);
    }

    /**
     * Bind key and set default thumbnail
     *
     * @param $cases
     * @return mixed
     */
    private function prepareCasesForUsage($cases)
    {
        // Loop through cases
        foreach($cases as $key => $case)
        {

            // Bind key
            ! empty($case->code_name) ?
                $cases[$key]->key = $case->code_name : $cases[$key]->key = Str::camel($cases[$key]->translation->slug);

            // Set default thumbnail
            // Find thumbnail
            $case->images->isEmpty() ?
                $cases[$key]->thumbnail = '/images/komma/temp/temp.jpg' :
                $cases[$key]->thumbnail = $case->images->shift()->large_image_url;
        }

        return $cases;
    }


}