import * as Sentry from '@sentry/browser';

let _isInitialized = false;
let _canReportEvent = false;

let sentryDSN = '';

/**
 * Initializes error reporting.
 *
 * If a sentry DSN is set we will use sentry, if not we will log to the console.
 *
 * @param {object} [options]
 * @param {boolean} [options.debug=false] Enable debug output
 * @param {string} [options.release] The project release
 */
export function init(options) {
    let defaults = {
        debug: false,
    };
    let actual = Object.assign({}, defaults, options);

    if (_isInitialized) throw new Error('Already initialized');

    let sentryOptions = {debug: actual.debug};

    if (actual.release) {
        sentryOptions['release'] = actual.release;
    }

    if (actual.environment) {
        sentryOptions['environment'] = actual.environment;
    }

    if (!sentryDSN) {
        if (options.debug) console.log('No sentry DSN set, sentry disabled');

        // In case we don't have a sentry config, we still use sentry, but print
        // all events into the console don't send them to the server.
        // XXX: Dummy DSN needed to make init() work.
        sentryOptions['dsn'] = 'http://12345@dummy.dummy/42';
        sentryOptions['beforeSend'] = (event, hint) => {
            console.error('ERR-REPORT:', hint.originalException || hint.syntheticException);
            return null;
        };
    } else {
        sentryOptions['dsn'] = sentryDSN;
        _canReportEvent = true;
    }

    Sentry.init(sentryOptions);

    _isInitialized = true;
}

/**
 * Whether showReportDialog() will work.
 */
export function canReportEvent() {
    if (!_isInitialized) throw new Error('Not initialized');
    return _canReportEvent;
}

/**
 * Show a report dialog for user error feedback.
 *
 * Call canReportEvent() first to see if this will do anything.
 */
export function showReportDialog() {
    if (!canReportEvent()) return;
    Sentry.showReportDialog();
}

/**
 * Log an exception
 *
 * @param {*} exception
 */
export function captureException(exception) {
    if (!_isInitialized) throw new Error('Not initialized');
    Sentry.captureException(exception);
}

/**
 * Log a message, returns an internal ID
 *
 * @param {string} message The message to log
 * @param {string} [level=error] The loglevel (error, warning, info, debug)
 */
export function captureMessage(message, level) {
    if (!_isInitialized) throw new Error('Not initialized');
    if (!level) level = 'error';
    if (!['error', 'warning', 'info', 'debug'].includes(level))
        throw new Error('Invalid log level');
    Sentry.captureMessage(message, level);
}