import { BaseCommand, flags } from '@adonisjs/core/build/standalone';
import Logger from '@ioc:Adonis/Core/Logger';
import { XMLBuilder } from 'xmlbuilder2/lib/interfaces';
import { create } from 'xmlbuilder2';
import Dataset from 'App/Models/Dataset';
import XmlModel from 'App/Library/XmlModel';
import { readFileSync } from 'fs';
import { transform } from 'saxon-js';
import { Client } from '@opensearch-project/opensearch';

const opensearchNode = process.env.OPENSEARCH_HOST || 'localhost';
const client = new Client({ node: `http://${opensearchNode}` }); // replace with your OpenSearch endpoint

export default class IndexDatasets extends BaseCommand {
    public static commandName = 'index:datasets';
    public static description = 'Index datasets based on publish_id';

    @flags.number({ alias: 'p' })
    public publish_id: number;

    public static settings = {
        /**
         * Set the following value to true, if you want to load the application
         * before running the command. Don't forget to call `node ace generate:manifest`
         * afterwards.
         */
        loadApp: true,

        /**
         * Set the following value to true, if you want this command to keep running until
         * you manually decide to exit the process. Don't forget to call
         * `node ace generate:manifest` afterwards.
         */
        stayAlive: false,
    };

    public async run() {
        this.logger.info('Hello world!');
        // const { default: Dataset } = await import('App/Models/Dataset');
        const datasets = await this.getDatasets();
        const proc = readFileSync('public/assets2/solr.sef.json');
        const index_name = 'tethys-records';

        for (var dataset of datasets) {
            // Logger.info(`File publish_id ${dataset.publish_id}`);
            const jsonString = await this.getJsonString(dataset, proc);
            // console.log(jsonString);
            await this.indexDocument(dataset, index_name, jsonString);
        }
    }

    private async getDatasets(): Promise<Dataset[]> {
        const query = Dataset.query().preload('xmlCache').where('server_state', 'published');
        if (this.publish_id) {
            query.where('publish_id', this.publish_id);
        }
        return await query;
    }

    private async getJsonString(dataset, proc) {
        let xml = create({ version: '1.0', encoding: 'UTF-8', standalone: true }, '<root></root>');
        const datasetNode = xml.root().ele('Dataset');
        await this.createXmlRecord(dataset, datasetNode);
        const xmlString = xml.end({ prettyPrint: false });

        try {
            const result = await transform({
                stylesheetText: proc,
                destination: 'serialized',
                sourceText: xmlString,
            });
            return result.principalResult;
        } catch (error) {
            Logger.error(`An error occurred while creating the user, error: ${error.message},`);
            return '';
        }
    }

    private async indexDocument(dataset: Dataset, index_name: string, doc: string): Promise<void> {
        try {
            let document = JSON.parse(doc);
            await client.index({
                id: dataset.publish_id?.toString(),
                index: index_name,
                body: document,
                refresh: true,
            });
            Logger.info(`dataset with publish_id ${dataset.publish_id} successfully indexed`);
        } catch (error) {
            Logger.error(`An error occurred while indexing datsaet with publish_id ${dataset.publish_id}.`);
        }
    }

    private async createXmlRecord(dataset: Dataset, datasetNode: XMLBuilder): Promise<void> {
        const domNode = await this.getDatasetXmlDomNode(dataset);
        if (domNode) {
            datasetNode.import(domNode);
        }
    }

    private async getDatasetXmlDomNode(dataset: Dataset): Promise<XMLBuilder | null> {
        const xmlModel = new XmlModel(dataset);
        // xmlModel.setModel(dataset);
        xmlModel.excludeEmptyFields();
        xmlModel.caching = true;
        // const cache = dataset.xmlCache ? dataset.xmlCache : null;
        // dataset.load('xmlCache');
        if (dataset.xmlCache) {
            xmlModel.xmlCache = dataset.xmlCache;
        }

        // return cache.getDomDocument();
        const domDocument: XMLBuilder | null = await xmlModel.getDomDocument();
        return domDocument;
    }
}