<?php

namespace App\Models;

use App\Models\Traits\Searchable;
use App\Presenters\Presentable;
use Auth;
use DB;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Support\Facades\Gate;
use Watson\Validating\ValidatingTrait;

/**
 * Model for Companies.
 *
 * @version    v1.8
 */
final class Company extends SnipeModel
{
    use HasFactory;

    protected $table = 'companies';

    // Declare the rules for the model validation
    protected $rules = [
        'name' => 'required|min:1|max:255|unique:companies,name',
    ];

    protected $presenter = \App\Presenters\CompanyPresenter::class;
    use Presentable;

    /**
    * Whether the model should inject it's identifier to the unique
    * validation rules before attempting validation. If this property
    * is not set in the model it will default to true.
    *
     * @var bool
    */
    protected $injectUniqueIdentifier = true;
    use ValidatingTrait;
    use Searchable;
    
    /**
     * The attributes that should be included when searching the model.
     * 
     * @var array
     */
    protected $searchableAttributes = ['name', 'phone', 'fax', 'created_at', 'updated_at'];

    /**
     * The relations and their attributes that should be included when searching the model.
     * 
     * @var array
     */
    protected $searchableRelations = [];   

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name',
        'phone',
        'fax',
    ];

    private static function isFullMultipleCompanySupportEnabled()
    {
        $settings = Setting::getSettings();

        // NOTE: this can happen when seeding the database
        if (is_null($settings)) {
            return false;
        } else {
            return $settings->full_multiple_companies_support == 1;
        }
    }

    /**
     * Scoping table queries, determining if a logged in user is part of a company, and only allows
     * that user to see items associated with that company
     */
    private static function scopeCompanyablesDirectly($query, $column = 'company_id', $table_name = null)
    {
        if (Auth::user()) {
            $company_id = Auth::user()->company_id;
        } else {
            $company_id = null;
        }

        $table = ($table_name) ? $table_name."." : $query->getModel()->getTable().".";

        if (\Schema::hasColumn($query->getModel()->getTable(), $column)) {
             return $query->where($table.$column, '=', $company_id);
        } else {
            return $query->join('users as users_comp', 'users_comp.id', 'user_id')->where('users_comp.company_id', '=', $company_id);
        }
    }

    public static function getIdFromInput($unescaped_input)
    {
        $escaped_input = e($unescaped_input);

        if ($escaped_input == '0') {
            return null;
        } else {
            return $escaped_input;
        }
    }

    public static function getIdForCurrentUser($unescaped_input)
    {
        if (! static::isFullMultipleCompanySupportEnabled()) {
            return static::getIdFromInput($unescaped_input);
        } else {
            $current_user = Auth::user();

            // Super users should be able to set a company to whatever they need
            if ($current_user->isSuperUser()) {
                return static::getIdFromInput($unescaped_input);
            } else {
                if ($current_user->company_id != null) {
                    return $current_user->company_id;
                } else {
                    return static::getIdFromInput($unescaped_input);
                }
            }
        }
    }

    public static function isCurrentUserHasAccess($companyable)
    {
        if (is_null($companyable)) {
            return false;
        } elseif (! static::isFullMultipleCompanySupportEnabled()) {
            return true;
        } elseif (!$companyable instanceof Company && !\Schema::hasColumn($companyable->getModel()->getTable(), 'company_id')) {
            // This is primary for the gate:allows-check in location->isDeletable()
            // Locations don't have a company_id so without this it isn't possible to delete locations with FullMultipleCompanySupport enabled
            // because this function is called by SnipePermissionsPolicy->before()
            return true;
        } else {
            if (Auth::user()) {
                $current_user_company_id = Auth::user()->company_id;
                $companyable_company_id = $companyable->company_id;

                return $current_user_company_id == null || $current_user_company_id == $companyable_company_id || Auth::user()->isSuperUser();
            }
        }
    }

    public static function isCurrentUserAuthorized()
    {
        return (! static::isFullMultipleCompanySupportEnabled()) || (Auth::user()->isSuperUser());
    }

    public static function canManageUsersCompanies()
    {
        return ! static::isFullMultipleCompanySupportEnabled() || Auth::user()->isSuperUser() ||
                Auth::user()->company_id == null;
    }

    /**
     * Checks if company can be deleted
     *
     * @author [Dan Meltzer] [<dmeltzer.devel@gmail.com>]
     * @since [v5.0]
     * @return bool
     */
    public function isDeletable()
    {
        return Gate::allows('delete', $this)
                && ($this->assets()->count() === 0)
                && ($this->accessories()->count() === 0)
                && ($this->consumables()->count() === 0)
                && ($this->components()->count() === 0)
                && ($this->users()->count() === 0);
    }

    public static function getIdForUser($unescaped_input)
    {
        if (! static::isFullMultipleCompanySupportEnabled() || Auth::user()->isSuperUser()) {
            return static::getIdFromInput($unescaped_input);
        } else {
            return static::getIdForCurrentUser($unescaped_input);
        }
    }

    public static function scopeCompanyables($query, $column = 'company_id', $table_name = null)
    {
        // If not logged in and hitting this, assume we are on the command line and don't scope?'
        if (! static::isFullMultipleCompanySupportEnabled() || (Auth::check() && Auth::user()->isSuperUser()) || (! Auth::check())) {
            return $query;
        } else {
            return static::scopeCompanyablesDirectly($query, $column, $table_name);
        }
    }

    public static function scopeCompanyableChildren(array $companyable_names, $query)
    {
        if (count($companyable_names) == 0) {
            throw new Exception('No Companyable Children to scope');
        } elseif (! static::isFullMultipleCompanySupportEnabled() || (Auth::check() && Auth::user()->isSuperUser())) {
            return $query;
        } else {
            $f = function ($q) {
                static::scopeCompanyablesDirectly($q);
            };

            $q = $query->where(function ($q) use ($companyable_names, $f) {
                $q2 = $q->whereHas($companyable_names[0], $f);

                for ($i = 1; $i < count($companyable_names); $i++) {
                    $q2 = $q2->orWhereHas($companyable_names[$i], $f);
                }
            });

            return $q;
        }
    }

    public function users()
    {
        return $this->hasMany(User::class, 'company_id');
    }

    public function assets()
    {
        return $this->hasMany(Asset::class, 'company_id');
    }

    public function licenses()
    {
        return $this->hasMany(License::class, 'company_id');
    }

    public function accessories()
    {
        return $this->hasMany(Accessory::class, 'company_id');
    }

    public function consumables()
    {
        return $this->hasMany(Consumable::class, 'company_id');
    }

    public function components()
    {
        return $this->hasMany(Component::class, 'company_id');
    }
}