/*********************************************************
 * IOBROKER INSTANZSTATUS PER HTML E-MAIL
 *
 * ROT
 *   - deaktiviert
 *   - gestoppt
 *
 * GELB
 *   - info.connection = false
 *
 * GRUEN
 *   - alles OK
 *
 * GRAU
 *   - ungeprueft (ausgeschlossen)
 *
 *********************************************************/


/*********************************************************
 * KONFIGURATION
 *********************************************************/

// Empfaenger
const EMAIL_TO = 'email@email.de';

// Betreff
const EMAIL_SUBJECT = 'ioBroker Instanzstatus';

// Wartezeit nach Scriptstart
const START_DELAY_MINUTES = 5;

// Adapter von der Pruefung ausschliessen
const EXCLUDED_ADAPTERS = [
    'ical.',
    'openweathermap.'
];


/*********************************************************
 * AB HIER NICHTS MEHR AENDERN
 *********************************************************/

const START_DELAY_MS = START_DELAY_MINUTES * 60 * 1000;


/*********************************************************
 * HILFSFUNKTION
 *********************************************************/

function isExcluded(instanceId) {

    return EXCLUDED_ADAPTERS.some(adapter =>
        instanceId.startsWith(adapter)
    );

}


/*********************************************************
 * PRUEFUNG
 *********************************************************/

function checkInstances() {

    const critical = [];
    const warning = [];
    const ok = [];
    const unchecked = [];

    const warningAdapters = new Set();

    // ----------------------------------------------------
    // GELBE ADAPTER ERMITTELN
    // ----------------------------------------------------

    const allStates = $('state');

    allStates.each(function(id) {

        try {

            if (!id.endsWith('.info.connection')) {
                return;
            }

            const state = getState(id);

            if (state && state.val === false) {

                const parts = id.split('.');

                if (parts.length >= 2) {
                    warningAdapters.add(parts[0] + '.' + parts[1]);
                }
            }

        } catch (e) {
            // ignorieren
        }

    });


    // ----------------------------------------------------
    // INSTANZEN PRUEFEN
    // ----------------------------------------------------

    const allAliveStates = $('state[id=system.adapter.*.alive]');

    allAliveStates.each(function(id) {

        try {

            const aliveState = getState(id);

            if (!aliveState) {
                return;
            }

            const alive = aliveState.val;

            const instanceId = id
                .replace('system.adapter.', '')
                .replace('.alive', '');

            const obj = getObject('system.adapter.' + instanceId);

            if (!obj || !obj.common) {
                return;
            }

            // AUSGESCHLOSSEN
            if (isExcluded(instanceId)) {

                unchecked.push({
                    instance: instanceId,
                    status: 'UNGEPRUEFT'
                });

                return;
            }

            const enabled = obj.common.enabled;

            // ROT
            if (!enabled) {

                critical.push({
                    instance: instanceId,
                    status: 'DEAKTIVIERT'
                });

                return;
            }

            if (!alive) {

                critical.push({
                    instance: instanceId,
                    status: 'GESTOPPT'
                });

                return;
            }

            // GELB
            if (warningAdapters.has(instanceId)) {

                warning.push({
                    instance: instanceId,
                    status: 'VERBINDUNGSPROBLEM'
                });

                return;
            }

            // GRUEN
            ok.push({
                instance: instanceId,
                status: 'OK'
            });

        } catch (e) {
            // ignorieren
        }

    });


    // ----------------------------------------------------
    // SORTIEREN
    // ----------------------------------------------------

    critical.sort((a, b) => a.instance.localeCompare(b.instance));
    warning.sort((a, b) => a.instance.localeCompare(b.instance));
    ok.sort((a, b) => a.instance.localeCompare(b.instance));
    unchecked.sort((a, b) => a.instance.localeCompare(b.instance));


    // ----------------------------------------------------
    // HTML
    // ----------------------------------------------------

    let html = '';

    html += '<html>';
    html += '<body style="font-family:Arial,Helvetica,sans-serif;">';

    html += '<h2>ioBroker Instanzstatus</h2>';

    html += '<p>';
    html += '<b>Kritisch:</b> ' + critical.length + '<br>';
    html += '<b>Warnung:</b> ' + warning.length + '<br>';
    html += '<b>OK:</b> ' + ok.length + '<br>';
    html += '<b>Ungeprueft:</b> ' + unchecked.length;
    html += '</p>';

    html += '<table style="border-collapse:collapse;width:100%;">';

    html += '<tr>';
    html += '<th style="border:1px solid #ccc;padding:8px;text-align:left;">Instanz</th>';
    html += '<th style="border:1px solid #ccc;padding:8px;text-align:left;">Status</th>';
    html += '</tr>';

    critical.forEach(item => {
        html += '<tr style="background:#ffd6d6;">';
        html += '<td style="border:1px solid #ccc;padding:6px;">' + item.instance + '</td>';
        html += '<td style="border:1px solid #ccc;padding:6px;color:#cc0000;font-weight:bold;">' + item.status + '</td>';
        html += '</tr>';
    });

    warning.forEach(item => {
        html += '<tr style="background:#fff4cc;">';
        html += '<td style="border:1px solid #ccc;padding:6px;">' + item.instance + '</td>';
        html += '<td style="border:1px solid #ccc;padding:6px;color:#b8860b;font-weight:bold;">' + item.status + '</td>';
        html += '</tr>';
    });

    ok.forEach(item => {
        html += '<tr style="background:#e8f7e8;">';
        html += '<td style="border:1px solid #ccc;padding:6px;">' + item.instance + '</td>';
        html += '<td style="border:1px solid #ccc;padding:6px;color:#008000;font-weight:bold;">' + item.status + '</td>';
        html += '</tr>';
    });

    unchecked.forEach(item => {
        html += '<tr style="background:#eeeeee;">';
        html += '<td style="border:1px solid #ccc;padding:6px;">' + item.instance + '</td>';
        html += '<td style="border:1px solid #ccc;padding:6px;color:#666666;font-weight:bold;">' + item.status + '</td>';
        html += '</tr>';
    });

    html += '</table>';

    html += '<br>';
    html += '<small>Erstellt: ' + formatDate(new Date(), 'DD.MM.YYYY hh:mm:ss') + '</small>';

    html += '</body>';
    html += '</html>';


    // ----------------------------------------------------
    // LOG + MAIL
    // ----------------------------------------------------

    log(
        'Instanzstatus: ' +
        critical.length + ' kritisch, ' +
        warning.length + ' Warnungen, ' +
        ok.length + ' OK, ' +
        unchecked.length + ' ungeprueft'
    );

    sendTo('email.0', {
        to: EMAIL_TO,
        subject: EMAIL_SUBJECT,
        html: html
    });

    log('Instanzstatus per E-Mail versendet an: ' + EMAIL_TO);
}


/*********************************************************
 * START
 *********************************************************/

log('Instanzstatus-Pruefung startet in ' + START_DELAY_MINUTES + ' Minuten');

setTimeout(function () {
    checkInstances();
}, START_DELAY_MS);