/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

import Config from "../config";
import ContentTypeConfigInterface from "../content-type-config.types";
import loadModule from "../utils/loader";
import ConverterPool from "./converter-pool";

/**
 * Create a new instance of converter pool
 */
export default function create(contentType: string): Promise<typeof ConverterPool> {
    const config: ContentTypeConfigInterface = Config.getContentTypeConfig(contentType);
    const converters: string[] = [];
    let appearanceName: string;
    for (appearanceName of Object.keys(config.appearances)) {
        const appearance = config.appearances[appearanceName];
        if (appearance !== undefined && appearance.elements !== undefined) {
            let elementName: string;
            for (elementName of Object.keys(appearance.elements)) {
                if (appearance.elements[elementName].style !== undefined) {
                    for (const propertyConfig of appearance.elements[elementName].style) {
                        if (!!propertyConfig.converter
                            && converters.indexOf(propertyConfig.converter) === -1
                            && !ConverterPool.get(propertyConfig.converter)
                        ) {
                            converters.push(propertyConfig.converter);
                        }
                        if (!!propertyConfig.preview_converter
                            && converters.indexOf(propertyConfig.preview_converter) === -1
                            && !ConverterPool.get(propertyConfig.preview_converter)
                        ) {
                            converters.push(propertyConfig.preview_converter);
                        }
                    }
                }

                if (appearance.elements[elementName].attributes !== undefined) {
                    for (const attributeConfig of appearance.elements[elementName].attributes) {
                        if (!!attributeConfig.converter
                            && converters.indexOf(attributeConfig.converter) === -1
                            && !ConverterPool.get(attributeConfig.converter)
                        ) {
                            converters.push(attributeConfig.converter);
                        }
                        if (!!attributeConfig.preview_converter
                            && converters.indexOf(attributeConfig.preview_converter) === -1
                            && !ConverterPool.get(attributeConfig.preview_converter)
                        ) {
                            converters.push(attributeConfig.preview_converter);
                        }
                    }
                }

                if (appearance.elements[elementName].html !== undefined) {
                    const htmlConfig = appearance.elements[elementName].html;
                    if (!!htmlConfig.converter
                        && converters.indexOf(htmlConfig.converter) === -1
                        && !ConverterPool.get(htmlConfig.converter)
                    ) {
                        converters.push(htmlConfig.converter);
                    }

                    if (!!htmlConfig.preview_converter
                        && converters.indexOf(htmlConfig.preview_converter) === -1
                        && !ConverterPool.get(htmlConfig.preview_converter)
                    ) {
                        converters.push(htmlConfig.preview_converter);
                    }
                }
            }
        }
    }

    return new Promise((resolve: (converterPool: typeof ConverterPool) => void) => {
        loadModule(converters, (...loadedConverters: any[]) => {
            for (let i = 0; i < converters.length; i++) {
                ConverterPool.register(converters[i], new loadedConverters[i]());
            }
            resolve(ConverterPool);
        });
    });
}