/**
 * Browserfehler an GlitchTip (ohne Build-Schritt, ES2018).
 *
 * Fehlerfreie Seiten laden nur diese Datei. Das Sentry-SDK (selbst gehostet,
 * sentry-browser-<version>.min.js) wird erst beim ersten Fehler nachgeladen
 * und meldet dann genau diesen Fehler. Konfiguration kommt aus
 * <meta name="mivita-error-reporting">, das die Blade-Komponente
 * x-monitoring.browser-errors setzt.
 *
 * Bewusst ohne Regex-Lookbehind: ältere Safari-Versionen brechen sonst beim
 * Parsen ab.
 */
(function () {
    'use strict';

    var meta = document.querySelector('meta[name="mivita-error-reporting"]');
    var config = null;

    try {
        config = meta ? JSON.parse(meta.content) : null;
    } catch (e) {
        config = null;
    }

    if (!config || !config.dsn || !config.sdk) {
        return;
    }

    // wie App\Support\Monitoring\ErrorReportScrubber::AllowedQueryParameters
    var ALLOWED_QUERY = ['page', 'q', 'tab', 'sort', 'lang', 'month', 'year'];
    var TOKEN_SEGMENT = /^[A-Za-z0-9_-]{32,}$/;
    var EMAIL = /[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}/gi;

    /** Gleiche Regeln wie ErrorReportScrubber auf dem Server. */
    function scrubUrl(value) {
        try {
            var url = new URL(value, window.location.origin);
            url.pathname = url.pathname
                .split('/')
                .map(function (segment) {
                    return TOKEN_SEGMENT.test(segment) ? '[Filtered]' : segment;
                })
                .join('/');
            Array.from(url.searchParams.keys()).forEach(function (key) {
                if (ALLOWED_QUERY.indexOf(key) === -1 && key.indexOf('utm_') !== 0) {
                    url.searchParams.set(key, '[Filtered]');
                }
            });
            url.hash = '';

            return url.toString().replace(EMAIL, '[email]');
        } catch (e) {
            return '[Filtered]';
        }
    }

    var sdk = null;

    function loadSdk() {
        if (sdk) {
            return sdk;
        }

        sdk = new Promise(function (resolve, reject) {
            var script = document.createElement('script');
            script.src = config.sdk;
            script.async = true;
            script.onload = function () {
                resolve(window.MivitaSentry);
            };
            script.onerror = reject;
            document.head.appendChild(script);
        }).then(function (Sentry) {
            Sentry.init({
                dsn: config.dsn,
                release: config.release || undefined,
                environment: config.environment,
                sampleRate: typeof config.sampleRate === 'number' ? config.sampleRate : 1,
                sendDefaultPii: false,
                // Eigene Listener unten statt GlobalHandlers (sonst doppelt);
                // keine Breadcrumbs (Klicktexte, URLs) und keine Sessions.
                integrations: function (defaults) {
                    return defaults.filter(function (integration) {
                        return ['GlobalHandlers', 'Breadcrumbs', 'BrowserSession', 'BrowserApiErrors'].indexOf(integration.name) === -1;
                    });
                },
                ignoreErrors: ['ResizeObserver loop', 'Script error.', 'AbortError'],
                denyUrls: [/^chrome-extension:\/\//, /^moz-extension:\/\//, /^safari-(web-)?extension:\/\//],
                beforeSend: function (event) {
                    if (event.request && event.request.url) {
                        event.request.url = scrubUrl(event.request.url);
                    }
                    if (event.request && event.request.headers && event.request.headers.Referer) {
                        event.request.headers.Referer = scrubUrl(event.request.headers.Referer);
                    }
                    ((event.exception && event.exception.values) || []).forEach(function (exception) {
                        if (exception.value) {
                            exception.value = exception.value.replace(EMAIL, '[email]');
                        }
                    });

                    return event;
                },
            });

            if (config.userId) {
                Sentry.setUser({ id: String(config.userId) });
            }
            Sentry.setTag('area', config.area);

            return Sentry;
        });

        return sdk;
    }

    /**
     * Promise-Ablehnungen mit Objekt statt Error kämen als „Error: [object Object]“
     * an — Typ und Inhalt mitschicken, damit die Quelle erkennbar ist.
     */
    function rejectionToError(reason) {
        if (reason instanceof Error) {
            return reason;
        }

        var kind = (reason && reason.constructor && reason.constructor.name) || typeof reason;
        var text;
        try {
            text = typeof reason === 'string' ? reason : JSON.stringify(reason);
        } catch (e) {
            text = String(reason);
        }

        return new Error('Unbehandelte Ablehnung (' + kind + '): ' + String(text == null ? '' : text).slice(0, 300));
    }

    function capture(error) {
        loadSdk()
            .then(function (Sentry) {
                Sentry.captureException(error);
            })
            .catch(function () {});
    }

    window.addEventListener('error', function (event) {
        // Ressourcenfehler (Bild, Skript) haben kein `error` — nur echte Skriptfehler.
        if (event.error) {
            capture(event.error);
        }
    });

    window.addEventListener('unhandledrejection', function (event) {
        capture(rejectionToError(event.reason));
    });
})();