<?php

namespace App\Http\Controllers;

use App\Helpers\Helper;
use App\Http\Requests\CustomFieldRequest;
use App\Models\CustomField;
use App\Models\CustomFieldset;
use Illuminate\Support\Facades\Auth;
use Redirect;

/**
 * This controller handles all actions related to Custom Asset Fields for
 * the Snipe-IT Asset Management application.
 *
 * @todo Improve documentation here.
 * @todo Check for raw DB queries and try to convert them to query builder statements
 * @version    v2.0
 * @author [Brady Wetherington] [<uberbrady@gmail.com>]
 */
class CustomFieldsController extends Controller
{
    /**
     * Returns a view with a listing of custom fields.
     *
     * @author [Brady Wetherington] [<uberbrady@gmail.com>]
     * @since [v1.8]
     * @return \Illuminate\Support\Facades\View
     * @throws \Illuminate\Auth\Access\AuthorizationException
     */
    public function index()
    {
        $this->authorize('view', CustomField::class);

        $fieldsets = CustomFieldset::with('fields', 'models')->get();
        $fields = CustomField::with('fieldset')->get();

        return view('custom_fields.index')->with('custom_fieldsets', $fieldsets)->with('custom_fields', $fields);
    }

    /**
     * Just redirect the user back if they try to view the details of a field.
     * We already show those details on the listing page.
     *
     * @see CustomFieldsController::storeField()
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v5.1.5]
     * @return Redirect
     * @throws \Illuminate\Auth\Access\AuthorizationException
     */
    public function show()
    {
        return redirect()->route('fields.index');
    }

    /**
     * Returns a view with a form to create a new custom field.
     *
     * @see CustomFieldsController::storeField()
     * @author [Brady Wetherington] [<uberbrady@gmail.com>]
     * @since [v1.8]
     * @return \Illuminate\Support\Facades\View
     * @throws \Illuminate\Auth\Access\AuthorizationException
     */
    public function create()
    {
        $this->authorize('create', CustomField::class);

        return view('custom_fields.fields.edit', [
            'predefinedFormats' => Helper::predefined_formats(),
        'customFormat' => '',
        ])->with('field', new CustomField());
    }

    /**
     * Validates and stores a new custom field.
     *
     * @see CustomFieldsController::createField()
     * @author [Brady Wetherington] [<uberbrady@gmail.com>]
     * @since [v1.8]
     * @return Redirect
     * @throws \Illuminate\Auth\Access\AuthorizationException
     */
    public function store(CustomFieldRequest $request)
    {
        $this->authorize('create', CustomField::class);

        $field = new CustomField([
            'name' => $request->get('name'),
            'element' => $request->get('element'),
            'help_text' => $request->get('help_text'),
            'field_values' => $request->get('field_values'),
            'field_encrypted' => $request->get('field_encrypted', 0),
            'show_in_email' => $request->get('show_in_email', 0),
            'user_id' => Auth::id(),
        ]);

        if ($request->filled('custom_format')) {
            $field->format = e($request->get('custom_format'));
        } else {
            $field->format = e($request->get('format'));
        }

        if ($field->save()) {
            return redirect()->route('fields.index')->with('success', trans('admin/custom_fields/message.field.create.success'));
        }

        return redirect()->back()->withInput()
            ->with('error', trans('admin/custom_fields/message.field.create.error'));
    }

    /**
     * Detach a custom field from a fieldset.
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @since [v3.0]
     * @return Redirect
     * @throws \Illuminate\Auth\Access\AuthorizationException
     */
    public function deleteFieldFromFieldset($field_id, $fieldset_id)
    {
        $field = CustomField::find($field_id);

        $this->authorize('update', $field);

        if ($field->fieldset()->detach($fieldset_id)) {
            return redirect()->route('fieldsets.show', ['fieldset' => $fieldset_id])
                ->with('success', trans('admin/custom_fields/message.field.delete.success'));
        }

        return redirect()->back()->withErrors(['message' => 'Field is in-use']);
    }

    /**
     * Delete a custom field.
     *
     * @author [Brady Wetherington] [<uberbrady@gmail.com>]
     * @since [v1.8]
     * @return Redirect
     * @throws \Illuminate\Auth\Access\AuthorizationException
     */
    public function destroy($field_id)
    {
        if ($field = CustomField::find($field_id)) {
            $this->authorize('delete', $field);

            if (($field->fieldset) && ($field->fieldset->count() > 0)) {
                return redirect()->back()->withErrors(['message' => 'Field is in-use']);
            }
            $field->delete();

            return redirect()->route('fields.index')
                ->with('success', trans('admin/custom_fields/message.field.delete.success'));
        }

        return redirect()->back()->withErrors(['message' => 'Field does not exist']);
    }

    /**
     * Return a view to edit a custom field
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @param  int $id
     * @since [v4.0]
     * @return \Illuminate\Support\Facades\View
     * @throws \Illuminate\Auth\Access\AuthorizationException
     */
    public function edit($id)
    {
        $field = CustomField::find($id);

        $this->authorize('update', $field);

        $customFormat = '';
        if ((stripos($field->format, 'regex') === 0) && ($field->format !== CustomField::PREDEFINED_FORMATS['MAC'])) {
            $customFormat = $field->format;
        }

        return view('custom_fields.fields.edit', [
            'field'             => $field,
            'customFormat'      => $customFormat,
            'predefinedFormats' => Helper::predefined_formats(),
        ]);
    }

    /**
     * Store the updated field
     *
     * @todo Allow encrypting/decrypting if encryption status changes
     *
     * @author [A. Gianotto] [<snipe@snipe.net>]
     * @param  int $id
     * @since [v4.0]
     * @return Redirect
     * @throws \Illuminate\Auth\Access\AuthorizationException
     */
    public function update(CustomFieldRequest $request, $id)
    {
        $field = CustomField::find($id);

        $this->authorize('update', $field);

        $field->name = e($request->get('name'));
        $field->element = e($request->get('element'));
        $field->field_values = e($request->get('field_values'));
        $field->user_id = Auth::id();
        $field->help_text = $request->get('help_text');
        $field->show_in_email = $request->get('show_in_email', 0);

        if ($request->get('format') == 'CUSTOM REGEX') {
            $field->format = e($request->get('custom_format'));
        } else {
            $field->format = e($request->get('format'));
        }

        if ($field->save()) {
            return redirect()->route('fields.index')->with('success', trans('admin/custom_fields/message.field.update.success'));
        }

        return redirect()->back()->withInput()->with('error', trans('admin/custom_fields/message.field.update.error'));
    }
}