"use strict";

class trweb {
    #knownTorrents = {};

    #needsSort = false;

    #loadcb = function(key) {return localStorage.getItem(`trweb.${key}`)};
    #savecb = function(key, value) {localStorage.setItem(`trweb.${key}`, value)};
    #logger = function(msg) {};
    #logcb = function(module, loglevel, msg) {this.#logger(`${module}: ${msg}`)}.bind(this);

    #timer;


    #container;
    #guiFooter;

    #dom_menubar = new trdom_menubar();
    #dom_servermanager;
    #dom_torrentmanagger = new trdom_torrentmanager();

    constructor (container, loadcb, savecb, logger) {
        this.#container = container;
        if (loadcb != null) {
            this.#loadcb = loadcb;
            this.#savecb = savecb;
        }
        if (logger != null) {
            this.#logger = logger;
        }

        this.#dom_servermanager = new trdom_servermanager(this.#loadcb, this.#savecb, this.#logcb, this.#registerServer)

        this.#guiFooter = document.createElement('div');
        this.#guiFooter.classList.add('trweb_footer');

        if (document.readyState === 'complete' || document.readyState === 'interactive') {
            this.#logger('Document already loaded, jumpstarting');
            this.#handler({'type': 'DOMContentLoaded'});
        }
        else {
            this.#logger('Waiting for document to load');
            document.addEventListener('DOMContentLoaded', this.#handler);
        }
    }

    #registerServer = function(name, initdata) {
        let torrentCallback = function(hash, torrentInfo) {
            let mergedTorrentInfo = this.#knownTorrents[hash];
            if (mergedTorrentInfo == null) {
                mergedTorrentInfo = this.#createTorrentEntry(hash);
            }
            mergedTorrentInfo.setStatus(name, torrentInfo);
            mergedTorrentInfo.name = torrentInfo.name;

            this.#updateTorrentDisplay(mergedTorrentInfo);
        }.bind(this);
        let newserver = new trserver(initdata, function(msg) {this.#logger(`[Server: ${name}]: ${msg}`);}.bind(this), torrentCallback);
        this.#dom_servermanager.getServers()[name] = newserver;
        newserver.refreshTorrentList();
    }.bind(this);

    #createTorrentEntry(hash) {
        let torrent = new trtorrent(hash);

        this.#knownTorrents[hash] = torrent;

        for (const srv of Object.keys(this.#dom_servermanager.getServers())) {
            this.#createServerEntryForTorrent(hash, srv);
        }

        this.#dom_torrentmanagger.getElement().appendChild(torrent.getElement());

        this.#updateTorrentDisplay(torrent);

        return torrent;
    }

    #createServerEntryForTorrent(hash, srv) {
        this.#needsSort = true;
        let control = new trdom_torrentcontrol(hash, this.#dom_servermanager.getServers()[srv], this.#logcb, function() {return this.#knownTorrents}.bind(this));

        let torrent = this.#knownTorrents[hash];

        torrent.addControl(srv, control);
    }

    #updateTorrentDisplay(torrent) {
        let txt_name = torrent.getElement().element_name;
        nukeChildren(txt_name);
        txt_name.appendChild(document.createTextNode(torrent.name));

        for (const srv of Object.keys(this.#dom_servermanager.getServers())) {
            let control = torrent.getControl(srv);
            let control_element = control.getElement();
            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.#dom_servermanager.getServers()[srv].isOnline()) {
                statustext = "Server offline";
                statusclass = 'trweb_status_offline';
                barwidth = 0;
            }
            else {
                let server_status = torrent.getStatus(srv);
                if (server_status == undefined || server_status.deleted) {
                    statustext = "Not available";
                    statusclass = 'trweb_status_nonexistent';
                    barwidth = 0;
                }
                else {
                    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 = `[${srv}]: ${statustext} - ${server_status.percentDone}%`;
                }
            }
            control_element.element_statusbar.style.width = `${barwidth}%`;
            control_element.classList.add(statusclass);
            status.appendChild(document.createTextNode(statustext));
        }
    }

    #handler = function(e) {
        switch (e.type) {
            case 'DOMContentLoaded':
                this.#logger('Activating TRWEB instance');
                
                this.#container = document.getElementById(this.#container);
                this.#container.classList.add('trweb_container');
                this.#container.appendChild(this.#dom_menubar.getElement());
                this.#container.appendChild(this.#dom_torrentmanagger.getElement());
                this.#container.appendChild(this.#guiFooter);
                
                this.#dom_servermanager.loadServers();
                this.#dom_servermanager.saveServers();
                this.setTimer();
                break;
        }
    }.bind(this);

    refresh() {
        for (const [key, value] of Object.entries(this.#dom_servermanager.getServers())) {
            //value.refreshSession();
            value.refreshTorrentList();
        }
    }

    sort() {
        let list = Object.values(this.#knownTorrents);
        list.sort((a, b) => a.name.localeCompare(b.name));

        for (const torrent of list) {
            this.#dom_torrentmanagger.getElement().appendChild(torrent.getElement());
        }
        return list;
    }

    #timercb = function() {
        if (this.#needsSort) {
            this.#needsSort = false;
            this.sort();
        }
        this.refresh();
    }.bind(this);

    setTimer() {
        this.#timer = window.setInterval(this.#timercb, 2000);
    }

    haltTimer() {
        window.clearInterval(this.#timer);
    }

    save() {
        this.#dom_servermanager.saveServers();
    }

    rpc(server, method, args) {
        this.#dom_servermanager.getServers()[server].rpccall_debug(method, args);
    }

    addServer(name, url, user, pass) {
        this.#registerServer(name, {'rpcurl': url, 'auth': `Basic ${btoa(`${user}:${pass}`)}`});

        for (const hash of Object.keys(this.#knownTorrents)) {
            this.#createServerEntryForTorrent(hash, name);
        }

        this.#dom_servermanager.saveServers();
    }

    removeServer(name) {
        delete this.#dom_servermanager.getServers()[name];

        for (const [hash, entry] of Object.entries(this.#knownTorrents)) {
            entry.element.removeChild(entry.element_server[name]);
            delete entry.servers[name];
            delete entry.element_server[name]
        }

        this.#dom_servermanager.saveServers();
    }
}

var trinstance = new trweb('trcontainer', null, null, function(msg) {console.info(`TRWEB: ${msg}`)});
//var trinstance = new trweb('trcontainer', null, null, null);