import { parseXml } from '@rgrove/parse-xml';

/// <reference types="cordova-plugin-ble-central" />
class Updater {
    archiveURL;
    feedType;
    bleObject;
    bleDeviceId;
    _updaterServiceUUID = "71a4438e-fd52-4b15-b3d2-ec0e3e56193b";
    _updaterVersionCharactersiticUUID = "1978a3df-c009-4837-b295-57ef429dde8c";
    file;
    constructor(archiveURL = "/", feedType = "atom", bleObject) {
        this.archiveURL = archiveURL;
        this.feedType = feedType;
        if (bleObject) {
            this.bleObject = bleObject;
        }
    }
    /*
    FEEDS
    */
    async getRawArchive() {
        const res = await fetch(`http://cors.emaker.limited/?url=${this.archiveURL}.${this.feedType}`, {
        // "mode": "cors"
        });
        const text = await res.text();
        return text;
    }
    // atom feeds 
    atomGetVersionDetails(entry) {
        let outEntry = { title: "", date: new Date, link: "", html: "" };
        entry.children.forEach((elm) => {
            let element = elm;
            if (element.name == "title") {
                outEntry.title = element.children[0].text;
            }
            else if (element.name == "updated") {
                outEntry.date = new Date(element.children[0].text);
            }
            else if (element.name == "link") {
                outEntry.link = element.attributes["href"];
            }
            else if (element.name == "content") {
                outEntry.html = element.children[0].text;
            }
        });
        return outEntry;
    }
    async atomGetArchive() {
        const rawArchive = await this.getRawArchive();
        const releaseNotes = parseXml(rawArchive);
        const output = [];
        // console.dir(releaseNotes) 
        releaseNotes.children[0].children.forEach((elm) => {
            if (elm.type == "element") {
                const element = elm;
                if (element.name == "entry") {
                    output.push(this.atomGetVersionDetails(element));
                }
            }
        });
        return output;
    }
    // rss feeds
    rssGetVersionDetails(entry) {
        let outEntry = { title: "", date: new Date, link: "", html: "" };
        entry.children.forEach((elm) => {
            let element = elm;
            if (element.name == "title") {
                outEntry.title = element.children[0].text;
            }
            else if (element.name == "pubDate") {
                outEntry.date = element.children[0].text;
            }
            else if (element.name == "link") {
                outEntry.link = element.children[0].text;
            }
            else if (element.name == "content") {
                outEntry.html = element.children[0].text;
            }
        });
        return outEntry;
    }
    async rssGetArchive() {
        const rawArchive = await this.getRawArchive();
        const releaseNotes = parseXml(rawArchive);
        const output = [];
        releaseNotes.children[0].children[1].children.forEach((elm) => {
            if (elm.type == "element") {
                const element = elm;
                if (element.name == "item") {
                    output.push(this.rssGetVersionDetails(element));
                }
            }
        });
        return output;
    }
    async getArchive() {
        if (this.feedType == "atom") {
            return this.atomGetArchive();
        }
        else if (this.feedType == "rss") {
            return this.rssGetArchive();
        }
    }
    /*
    BLUETOOTH
    */
    setDeviceId(id) {
        this.bleDeviceId = id;
    }
    bytesToString(buffer) {
        return String.fromCharCode.apply(null, new Uint8Array(buffer));
    }
    async readVersionNumber() {
        return new Promise((resolve, reject) => {
            this.bleObject.read(this.bleDeviceId, this._updaterServiceUUID, this._updaterVersionCharactersiticUUID, (rawData) => {
                resolve(this.bytesToString(rawData));
            }, (error) => {
                reject(`Error: ${error}`);
            });
        });
    }
    async getLatestVersion() {
        let feed = await this.getArchive();
        let newestDate = feed[0].date;
        let i = 0;
        feed.forEach((item, index) => {
            if (item.date > newestDate) {
                newestDate = item.date;
                i = index;
            }
        });
        return feed[i].title;
    }
    async checkForUpdate() {
        // read device value
        const deviceVersion = await this.readVersionNumber();
        // compare with latest version
        const latestVersion = await this.getLatestVersion();
        if (deviceVersion != latestVersion) {
            return true;
        }
        // update
        return false;
    }
    async getBoardVersion() {
        return await this.readVersionNumber();
    }
    /*
    FILE FLASHING
    */
    async getFirmware(version) {
        try {
            const res = await fetch(`http://cors.emaker.limited/?url=${this.archiveURL}/download/${version.title}/firmware.bin`);
            let buf = await res.arrayBuffer();
            this.file = new Int8Array(buf);
            return true;
        }
        catch {
            return false;
        }
    }
    getFileSize() {
        return this.file.byteLength;
    }
}

export { Updater as default };