"use strict";

class trdom_torrentcontrol extends EventTarget {
    #logcb;
    #log(loglevel, msg) {
        if (this.#logcb !== null) {
            this.#logcb(`server:${this.#server.name}:${this.#hash}`, loglevel, msg);
        }
    }

    #element = document.createElement('div');
    get element() {
        return this.#element;
    }

    #hash;
    #server;

    #data;
    get exists() {
        return this.#data != null && this.#data.name != null;
    }
    get name() {
        return this.exists ? this.#data.name : this.#hash;
    }
    get magnet() {
        return this.#data != null ? this.#data.magnetLink : null;
    }
    set magnet(value) {
        if (this.#data == null) {
            this.#data = {};
        }
        this.#data.magnetLink = value;
        this.updateDOM();
    }

    updateDOM() {
        let control_element = this.#element;
        let status = control_element.element_status;

        control_element.classList.remove(
            'trweb_status_asdf',
            'trweb_status_offline',
            'trweb_status_nonexistent',
            'trweb_status_paused',
            'trweb_status_verifqueued',
            'trweb_status_verifying',
            'trweb_status_downloading',
            'trweb_status_seeding'
        );

        nukeChildren(status);

        let statustext = 'Nothing to see here';
        let statusclass = 'trweb_status_asdf'
        let barwidth = 50;
        if (!this.#server.isOnline()) {
            statustext = "Server offline";
            statusclass = 'trweb_status_offline';
            barwidth = 0;
        }
        else {
            if (!this.exists) {
                //this.#log(5, JSON.stringify(this.#data));
                statustext = "Not available";
                statusclass = 'trweb_status_nonexistent';
                barwidth = 0;
            }
            else {
                let server_status = this.#data;
                statustext = `${server_status.status}`;
                barwidth = server_status.percentDone;
                switch (server_status.status) {
                    case 0:
                        statustext = 'Paused';
                        statusclass = 'trweb_status_paused';
                        break;
                    case 1:
                        statustext = 'Queued for verification';
                        statusclass = 'trweb_status_verifqueued';
                        break;
                    case 2:
                        statustext = 'Verifying';
                        statusclass = 'trweb_status_verifying';
                        break;
                    case 3:
                        statustext = 'Queued';
                        break;
                    case 4:
                        statustext = 'Downloading';
                        statusclass = 'trweb_status_downloading';
                        break;
                    case 6:
                        statustext = 'Seeding';
                        statusclass = 'trweb_status_seeding';
                        break;
                }

                statustext = `[${this.#server.name}]: ${statustext} - ${server_status.percentDone}%`;
            }
        }
        control_element.element_statusbar.style.width = `${barwidth}%`;
        control_element.classList.add(statusclass);
        status.appendChild(document.createTextNode(statustext));
    }

    handleEvent(e) {
        this.#log(6, `Handling event of type ${e.type}`);
        switch (e.type) {
        case 'click':
            if (e.currentTarget.hasAttributeNS('trweb', 'torrentlistfield')) {
                switch (e.currentTarget.getAttributeNS('trweb', 'torrentlistfield')) {
                case 'start':
                    this.#server.torrent_start(this.#hash);
                    e.stopPropagation();
                    break;
                case 'pause':
                    this.#server.torrent_pause(this.#hash);
                    e.stopPropagation();
                    break;
                case 'magnet':
                    e.stopPropagation();
                    if (this.magnet != null) {
                        this.#server.torrent_add_url(this.magnet, true, null);
                    }
                    else {
                        this.#log(3, 'Couldn\'t find magnet link!');
                        window.alert('Couldn\'t find magnet link!');
                    }
                    break;
                case 'download':
                    e.stopPropagation();
                    window.alert('not implemented');
                    break;
                }
            }
            break;
        case 'torrent-deleted':
            this.#log(6, 'we be delet');
            this.#data = null;
            this.updateDOM();
            break;
        case 'torrent-updated':
            if (e.detail.torrentHash == this.#hash) {
                this.#log(6, `Got data from server: ${JSON.stringify(e.detail.torrentInfo)}`);
                this.#data = e.detail.torrentInfo;
                this.updateDOM();
            }
            break;
        }
    }

    constructor(hash, server, initdata = null, logcb = null) {
        super();
        this.#hash = hash;
        this.#server = server;
        this.#logcb = logcb;

        let srv = server.name;

        // statusbar
        let element_statusbar = document.createElement('div');
        element_statusbar.classList.add('trweb_torrentliststatusbar');

        // Current status and percentage
        let element_status = document.createElement('div');
        element_status.classList.add('trweb_torrentliststatus', 'col-12');
        element_status.setAttributeNS('trweb', 'server', srv);
        element_status.setAttributeNS('trweb', 'torrentlistfield', 'status');

        let element_start = document.createElement('div');
        element_start.classList.add('trweb_torrentlistcontrol', 'col-4');
        element_start.setAttributeNS('trweb', 'server', srv);
        element_start.setAttributeNS('trweb', 'torrent', this.#hash);
        element_start.setAttributeNS('trweb', 'torrentlistfield', 'start');
        element_start.appendChild(document.createTextNode("Start"));
        element_start.addEventListener("click", this);

        let element_pause = document.createElement('div');
        element_pause.classList.add('trweb_torrentlistcontrol', 'col-4');
        element_pause.setAttributeNS('trweb', 'server', srv);
        element_pause.setAttributeNS('trweb', 'torrent', this.#hash);
        element_pause.setAttributeNS('trweb', 'torrentlistfield', 'pause');
        element_pause.appendChild(document.createTextNode("Pause"));
        element_pause.addEventListener("click", this);

        // Download by magnet
        let element_magnet = document.createElement('div');
        element_magnet.classList.add('trweb_torrentlistmagnet', 'col');
        element_magnet.setAttributeNS('trweb', 'server', srv);
        element_magnet.setAttributeNS('trweb', 'torrent', this.#hash);
        element_magnet.setAttributeNS('trweb', 'torrentlistfield', 'magnet');
        element_magnet.appendChild(document.createTextNode(`[${srv}] Magnet`));
        element_magnet.addEventListener("click", this);

        // Download by torrent file
        let element_download = document.createElement('div');
        element_download.classList.add('trweb_torrentlistdownload', 'col');
        element_download.setAttributeNS('trweb', 'server', srv);
        element_download.setAttributeNS('trweb', 'torrent', this.#hash);
        element_download.setAttributeNS('trweb', 'torrentlistfield', 'download');
        element_download.appendChild(document.createTextNode(`[${srv}] Get torrent`));
        element_download.addEventListener("click", this);

        // row container
        let element_serverrow = document.createElement('div');
        element_serverrow.classList.add('trweb_torrentlistserverrow', 'row');
        element_serverrow.appendChild(element_status);
        element_serverrow.appendChild(element_start);
        element_serverrow.appendChild(element_pause);
        element_serverrow.appendChild(element_magnet);
        element_serverrow.appendChild(element_download);

        this.#element.classList.add('trweb_torrentlistserver', 'col-2', 'container');
        this.#element.setAttributeNS('trweb', 'torrentlistfield', 'server');
        this.#element.setAttributeNS('trweb', 'server', srv);
        this.#element.element_statusbar = element_statusbar;
        this.#element.appendChild(element_statusbar);
        this.#element.element_row = element_serverrow;
        this.#element.appendChild(element_serverrow);
        this.#element.element_status = element_status;
        this.#element.element_start = element_start;
        this.#element.element_pause = element_pause;
        this.#element.element_magnet = element_magnet;
        this.#element.element_download = element_download;

        this.#data = initdata;

        this.updateDOM();

        this.addEventListener('torrent-updated', this);

        this.addEventListener('torrent-deleted', this);
        
        server.addControl(hash, this);
    }

}