// TimeMe.js should be loaded and running to track time as soon as it is loaded.

/**
 * @typedef {Object} BurstOptions
 * @property {boolean} enable_cookieless_tracking
 * @property {boolean} beacon_enabled
 * @property {boolean} do_not_track
 * @property {boolean} enable_turbo_mode
 * @property {boolean} track_url_change
 * @property {boolean} track_external_links
 * @property {string} pageUrl
 * @property {boolean} cookieless
 */

/**
 * @typedef {Object} BurstState
 * @property {Object} tracking
 * @property {boolean} tracking.isInitialHit
 * @property {number} tracking.lastUpdateTimestamp
 * @property {string} tracking.beacon_url
 * @property {BurstOptions} options
 * @property {Object} goals
 * @property {number[]} goals.completed
 * @property {string} goals.scriptUrl
 * @property {Array} goals.active
 * @property {Object} cache
 * @property {string|null} cache.uid
 * @property {string|null} cache.fingerprint
 * @property {boolean|null} cache.isUserAgent
 * @property {boolean|null} cache.isDoNotTrack
 * @property {boolean|null} cache.useCookies
 */

// Ensure tracking object exists
burst.tracking = burst.tracking || {
  isInitialHit: true,
  lastUpdateTimestamp: 0,
  ajaxUrl: '',
};

burst.should_load_ecommerce = burst.should_load_ecommerce || false;

// Cache fallback normalizations
burst.cache = burst.cache || {
  uid: null,
  fingerprint: null,
  isUserAgent: null,
  isDoNotTrack: null,
  useCookies: null
};

// Normalize goal IDs
if (burst.goals?.active) {
  burst.goals.active = burst.goals.active.map(goal => ({
    ...goal,
    ID: parseInt(goal.ID, 10)
  }));
}
if (burst.goals?.completed) {
  burst.goals.completed = burst.goals.completed.map(id => parseInt(id, 10));
}

// Page rendering promise
const pageIsRendered = new Promise(resolve => {
  if (document.prerendering) {
    document.addEventListener('prerenderingchange', resolve, { once: true });
  } else {
    resolve();
  }
});
// Inject goals script as a regular script tag to avoid CORS issues in headless setups.
// Dynamic import() enforces CORS; a script tag does not.
if (burst.goals?.active?.some(goal => !goal.page_url || goal.page_url === '' || goal.page_url === burst.options.pageUrl)) {
  const script = document.createElement('script');
  script.async = true;
  script.src = burst.goals.scriptUrl;
  document.head.appendChild(script);
}

/**
 * Get a cookie by name
 * @param name
 * @returns {Promise}
 */
const burst_get_cookie = name => {
  const nameEQ = name + '=';
  const ca = document.cookie.split(';');
  for (let c of ca) {
    c = c.trim();
    if (c.indexOf(nameEQ) === 0) return Promise.resolve(c.substring(nameEQ.length));
  }
  return Promise.reject(false);
};
/**
 * Set a cookie
 * @param name
 * @param value
 */
const burst_set_cookie = (name, value) => {
  const path = '/';
  let domain = '';
  let secure = location.protocol === 'https:' ? ';secure' : '';
  const date = new Date();
  date.setTime(date.getTime() + (burst.options.cookie_retention_days * 86400000));
  const expires = ';expires=' + date.toGMTString();
  if (domain) domain = ';domain=' + domain;
  document.cookie = `${name}=${value};SameSite=Strict${secure}${expires}${domain};path=${path}`;
};
/**
 * Should we use cookies for tracking
 * @returns {boolean}
 */
const burst_use_cookies = () => {
  if (burst.cache.useCookies !== null) return burst.cache.useCookies;
  const result = navigator.cookieEnabled && !burst.options.cookieless && burst.options.privacy_level !== 'private_mode';
  burst.cache.useCookies = result;
  return result;
};
/**
 * Enable or disable cookies
 * @returns {boolean}
 */
function burst_enable_cookies() {
  burst.options.cookieless = false;
  if (burst_use_cookies()) {
    burst_uid().then(uid => burst_set_cookie('burst_uid', uid));
  }
}
/**
 * Get or set the user identifier
 * @returns {Promise}
 */
const burst_uid = () => {
  if (burst.cache.uid !== null) return Promise.resolve(burst.cache.uid);
  return burst_get_cookie('burst_uid').then(cookie_uid => {
    burst.cache.uid = cookie_uid;
    return cookie_uid;
  }).catch(() => {
    const uid = burst_generate_uid();
    burst_set_cookie('burst_uid', uid);
    burst.cache.uid = uid;
    return uid;
  });
};
/**
 * Generate a random string
 * @returns {string}
 */
const burst_generate_uid = () => {
  return Array.from({ length: 32 }, () => Math.floor(Math.random() * 16).toString(16)).join(''); // nosemgrep
};

const burst_fingerprint = () => {
  if (burst.cache.fingerprint !== null) return Promise.resolve(burst.cache.fingerprint);
  const tm = new ThumbmarkJS.Thumbmark({
    exclude: [],

    permissions_to_check: [
      'geolocation',
      'notifications',
      'camera',
      'microphone',
      'gyroscope',
      'accelerometer',
      'magnetometer',
      'ambient-light-sensor',
      'background-sync',
      'persistent-storage'
    ]
  });

  return tm.get().then(result => {
    let baseFingerprint = result.thumbmark;

    const extraEntropy = [
      // Screen details
      screen.availWidth + 'x' + screen.availHeight,
      screen.width + 'x' + screen.height,
      screen.colorDepth,
      window.devicePixelRatio || 1,

      // System info
      navigator.hardwareConcurrency || 0,
      navigator.deviceMemory || 0,
      navigator.maxTouchPoints || 0,
      new Date().getTimezoneOffset(),

      // Browser capabilities
      navigator.cookieEnabled ? '1' : '0',
      typeof(Storage) !== 'undefined' ? '1' : '0',
      typeof(indexedDB) !== 'undefined' ? '1' : '0',
      navigator.onLine ? '1' : '0',
      navigator.languages ? navigator.languages.slice(0, 3).join(',') : navigator.language,

      // Platform details
      navigator.platform,
      navigator.oscpu || '',

      navigator.connection ? navigator.connection.effectiveType || '' : '',

      'ontouchstart' in window ? '1' : '0',
      typeof window.orientation !== 'undefined' ? '1' : '0',
      window.screen.orientation ? window.screen.orientation.type || '' : ''
    ].filter(item => item !== '').join('|');

    const combinedData = baseFingerprint + '|' + extraEntropy;

    let hash = 0;
    for (let i = 0; i < combinedData.length; i++) {
      const char = combinedData.charCodeAt(i);
      hash = ((hash << 5) - hash) + char;
      hash = hash & hash;
    }

    const hashHex = Math.abs(hash).toString(16).padStart(8, '0');
    const finalFingerprint = hashHex + baseFingerprint.substring(8);

    burst.cache.fingerprint = finalFingerprint;
    return finalFingerprint;

  }).catch(error => {
    console.error(error);
    return null;
  });
};

const burst_get_time_on_page = () => {
  if (typeof TimeMe === 'undefined') return Promise.resolve(0);
  const time = TimeMe.getTimeOnCurrentPageInMilliseconds();
  TimeMe.resetAllRecordedPageTimes();
  TimeMe.initialize({ idleTimeoutInSeconds: 30 });
  return Promise.resolve(time);
};
/**
 * Check if this is a user agent
 * @returns {boolean}
 */
const burst_is_user_agent = () => {
  if (burst.cache.isUserAgent !== null) return burst.cache.isUserAgent;
  const botPattern = /bot|spider|crawl|slurp|mediapartners|applebot|bing|duckduckgo|yandex|baidu|facebook|twitter/i;
  const result = botPattern.test(navigator.userAgent);
  burst.cache.isUserAgent = result;
  return result;
};

const burst_is_do_not_track = () => {
  if (burst.cache.isDoNotTrack !== null) return burst.cache.isDoNotTrack;
  if (!burst.options.do_not_track) {
    burst.cache.isDoNotTrack = false;
    return false;
  }
    // check for doNotTrack and globalPrivacyControl headers
  const result =
		"1" === navigator.doNotTrack ||
		"yes" === navigator.doNotTrack ||
		"1" === navigator.msDoNotTrack ||
		"1" === window.doNotTrack ||
		1 === navigator.globalPrivacyControl;
  burst.cache.isDoNotTrack = result;
  return result;
};
const burst_log_tracking_error = ({ status = 0, error = '', data = {} }) => {
  if ( !burst.options.debug || !burst.tracking.ajaxUrl ) {
    return;
  }

  fetch(burst.tracking.ajaxUrl, {
    method: 'POST',
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    body: new URLSearchParams({
      action: 'burst_tracking_error',
      status,
      error,
      data: data
    })
  });
};

const burst_beacon_request = (payload) => {
  const blob = new Blob([payload], { type: 'application/json' });
  if ( burst.options.debug ) {
    fetch( burst.tracking.beacon_url, {
      method: 'POST',
      body: blob,
      keepalive: true,
      headers: {
        'Content-Type': 'application/json'
      }
    })
        .then(response => {
          if (!response.ok) {
              burst_log_tracking_error({
                status: 0,
                error: 'sendBeacon failed',
                data: payload
              });
          }
        })
        .catch(error => {
          burst_log_tracking_error({
            status: 0,
            error: error?.message || 'sendBeacon failed',
            data: payload
          });
        });
  } else {
    navigator.sendBeacon(burst.tracking.beacon_url, blob);
  }
}

/**
 * Make a XMLHttpRequest and return a promise
 * @param obj
 * @returns {Promise<unknown>}
 */
const burst_api_request = obj => {
  const payload = JSON.stringify(obj.data || {});
  return new Promise(resolve => {
    if (burst.options.beacon_enabled) {
      burst_beacon_request(payload);
      resolve({ status: 200, data: 'ok' });
    } else {
      const token = Math.random().toString(36).substring(2, 9);// nosemgrep
      wp.apiFetch({
        path: `/burst/v1/track/?token=${token}`,
        keepalive: true,
        method: 'POST',
        data: payload,
      }).then(res => {
        const status = res.status || 200;
        resolve({ status, data: res.data || res });
        if (status !== 200) {
          burst_log_tracking_error({
            status,
            error: 'Non-200 status',
            data: payload
          });
        }
      }).catch(error => {
        resolve({ status: 200, data: 'ok' });
        burst_log_tracking_error({
          status: 0,
          error: error?.message || 'Burst tracking request failed',
          data: payload
        });
      });
    }
  });
};
/**
 * Update the tracked hit
 * Mostly used for updating time spent on a page
 * Also used for updating the UID (from fingerprint to a cookie)
 */
async function burst_update_hit(
	update_uid = false,
	force = false,
	extraData = {},
) {
	await pageIsRendered;
	if (burst_is_user_agent() || burst_is_do_not_track()) return;
	if (burst.tracking.isInitialHit) {
		burst_track_hit(extraData);
		return;
	}

	// If we don't force the update, we only update the hit if 300ms have passed since the last update
	if (!force && Date.now() - burst.tracking.lastUpdateTimestamp < 300) return;

	document.dispatchEvent(
		new CustomEvent("burst_before_update_hit", { detail: burst }),
	);

	const [time, id] = await Promise.all([
		burst_get_time_on_page(),
		burst.options.privacy_level === 'private_mode'
			? Promise.resolve(update_uid ? [false, false] : false)
			: update_uid
				? Promise.all([burst_uid(), burst_fingerprint()])
				: burst_use_cookies()
					? burst_uid()
					: burst_fingerprint(),
	]);

	const data = {
		fingerprint: update_uid ? id[1] : burst_use_cookies() ? false : id,
		uid: update_uid ? id[0] : burst_use_cookies() ? id : false,
		url: location.href,
		time_on_page: time,
		completed_goals: burst.goals.completed,
		should_load_ecommerce: burst.should_load_ecommerce,
		...extraData,
	};

	if (time > 0 || data.uid !== false) {
		await burst_api_request({ data: data });
		burst.tracking.lastUpdateTimestamp = Date.now();
	}
}
/**
 * Track a hit
 *
 */
async function burst_track_hit(extraData = {}) {
  const isInitialHit = burst.tracking.isInitialHit;
  burst.tracking.isInitialHit = false;
  await pageIsRendered;
  if ( !isInitialHit ) {
    burst_update_hit(false, false, extraData);
    return;
  }
  if (burst_is_user_agent() || burst_is_do_not_track()) return;

  if (Date.now() - burst.tracking.lastUpdateTimestamp < 300) return;

  document.dispatchEvent(new CustomEvent('burst_before_track_hit', { detail: burst }));

  const [time, id] = await Promise.all([
    burst_get_time_on_page(),
    burst.options.privacy_level === 'private_mode'
      ? Promise.resolve(false)
      : burst_use_cookies() ? burst_uid() : burst_fingerprint()
  ]);

  //wait for body document to resolve.
  let attempts = 0;
  const maxAttempts = 200; // 200 * 2ms = 400ms max, 2ms should be enough to get the body in almost all cases.
  while ( !document.body && attempts++ < maxAttempts ) {
    await new Promise(resolve => setTimeout(resolve, 2));
  }

  if ( !document.body ) {
    console.warn('Burst: missing page_id attribute, not able to resolve body element.');
  }

  const burstSearchParams = new URLSearchParams(location.search);
  const data = {
    uid: burst_use_cookies() ? id : false,
    fingerprint: burst_use_cookies() ? false : id,
    url: location.href,
    referrer_url: document.referrer,
    user_agent: navigator.userAgent || 'unknown',
    device_resolution: `${window.screen.width * window.devicePixelRatio}x${window.screen.height * window.devicePixelRatio}`,
    time_on_page: time,
    completed_goals: burst.goals.completed,
    page_id: document.body?.dataset?.burst_id ?? document.body?.dataset?.b_id ?? 0,
    page_type: document.body?.dataset?.burst_type ?? document.body?.dataset?.b_type ?? '',
    should_load_ecommerce: burst.should_load_ecommerce,
    search_term: burstSearchParams.get('s') || '',
    ...extraData,
  };

  document.dispatchEvent(new CustomEvent('burst_track_hit', { detail: data }));
  await burst_api_request({ method: 'POST', data: data });
  burst.tracking.lastUpdateTimestamp = Date.now();
}
/**
 * Initialize events
 * @returns {Promise<void>}
 *
 * More information on why we just use visibilitychange instead of beforeunload
 * to update the hits:
 * https://www.igvita.com/2015/11/20/dont-lose-user-and-app-state-use-page-visibility/
 *     https://developer.mozilla.org/en-US/docs/Web/API/Document/visibilitychange_event
 *     https://xgwang.me/posts/you-may-not-know-beacon/#the-confusion
 *
 */
function burst_init_events() {
  const handleVisibilityChange = () => {
    if (document.visibilityState === 'hidden' || document.visibilityState === 'unloaded') {
      burst_update_hit();
    }
  };

  const handleUrlChange = () => {
    if (!burst.options.track_url_change) return;
    burst.tracking.isInitialHit = true;
    burst_track_hit();
  };

  const getExternalLinkUrl = (anchorElement) => {
		const href = anchorElement?.getAttribute?.("href");
		if (!href || href.startsWith("#")) return false;

		let targetUrl;
		try {
			targetUrl = new URL(anchorElement.href, window.location.href);
		} catch (error) {
			return false;
		}

		if (!["http:", "https:"].includes(targetUrl.protocol)) return false;
		if (targetUrl.origin === window.location.origin) return false;

		return targetUrl.href;
	};

	const shouldWaitForNavigation = (event, anchorElement) => {
		if (event.defaultPrevented) return false;
		if (event.button !== 0) return false;
		if (event.metaKey || event.ctrlKey || event.shiftKey || event.altKey)
			return false;
		if (anchorElement.hasAttribute("download")) return false;

		const linkTarget = (
			anchorElement.getAttribute("target") || ""
		).toLowerCase();
		return !linkTarget || linkTarget === "_self";
	};

  // Handle external link clicks for Elementor loading animations/lazy loading
  const handleExternalLinkClick = (e) => {
    const target = e.target.closest("a[href]");
    if (!target) return;

    if (!burst.options.track_external_links) return;

		const externalLinkUrl = getExternalLinkUrl(target);
		if (!externalLinkUrl) return;

		const trackingPayload = {
			external_link_url: externalLinkUrl,
		};

		if (burst.options.beacon_enabled || !shouldWaitForNavigation(e, target)) {
			burst_update_hit(false, true, trackingPayload);
			return;
		}

    e.preventDefault();
		const fallbackTimeoutMs = 250;
		let didNavigate = false;
		const navigate = () => {
			if (didNavigate) return;
			didNavigate = true;
			window.location.assign(target.href);
		};

		setTimeout(navigate, fallbackTimeoutMs);
		burst_update_hit(false, true, trackingPayload).finally(navigate);

    return;
  };

  // Attach event handlers
  if (burst.options.enable_turbo_mode) {
    if (document.readyState !== 'loading') {
      burst_track_hit();
    } else {
      // Note: 'load' does not fire on document (only on window), so listen for
      // DOMContentLoaded, which fires as soon as parsing completes - the same
      // moment a deferred script would have run.
      document.addEventListener('DOMContentLoaded', burst_track_hit, { once: true });
    }
  } else {
    burst_track_hit();
  }

  document.addEventListener('visibilitychange', handleVisibilityChange);
  document.addEventListener('pagehide', () => burst_update_hit());
  document.addEventListener('click', handleExternalLinkClick, true); // Use capture phase to ensure we catch the event
  document.addEventListener('burst_fire_hit', () => burst_track_hit());
  document.addEventListener('burst_enable_cookies', () => {
    burst_enable_cookies();
    burst_update_hit(true);
  });

  const originalPushState = history.pushState;
  history.pushState = function () {
    originalPushState.apply(this, arguments);
    handleUrlChange();
  };

  const originalReplaceState = history.replaceState;
  history.replaceState = function () {
    originalReplaceState.apply(this, arguments);
    handleUrlChange();
  };

  window.addEventListener('popstate', handleUrlChange);
}

document.addEventListener('wp_listen_for_consent_change', e => {
  const changed = e.detail;
  if (changed.statistics === 'allow') {
    burst_init_events();
  }
});

if (typeof wp_has_consent !== 'function') {
  burst_init_events();
} else if (wp_has_consent('statistics')) {
  burst_init_events();
}

window.burst_uid = burst_uid;
window.burst_use_cookies = burst_use_cookies;
window.burst_fingerprint = burst_fingerprint;
window.burst_update_hit = burst_update_hit;
