// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
const helpers = require('../helpers');
const decorator = require('../decorator');

const applyReflect = (inFile, outFile, {axis}) => {
    return helpers.resolveImageMagickConvert([
        inFile,
        axis == 'x' ? '-flip' : '-flop',
        outFile,
    ]);
};

const reflectTransform = decorator(applyReflect);

reflectTransform.parameters = {
        outputPrefix: {
            defaultValue: 'reflected',
        },
        outputBucketName: {
            defaultValue: null,
        },
        axis: {
            defaultValue: 'y',
            validate: (a) => ['x', 'y'].includes(a),
        },
    };
reflectTransform.applyReflect = applyReflect;

module.exports = reflectTransform;
