const WECOM_WEBVIEW_PATTERN = /(wxwork|wecom|wechatwork)/i;
const ENTERPRISE_IM_PATTERN = /(wxwork|wecom|wechatwork|dingtalk|aliapp\(dingtalk\))/i;

export function canUseWindow() {
  return typeof window !== "undefined";
}

export function matchesMedia(query: string) {
  return canUseWindow() && typeof window.matchMedia === "function" && window.matchMedia(query).matches;
}

export function readUserAgent() {
  return canUseWindow() ? window.navigator.userAgent : "";
}

export function isWecomWebView(userAgent = readUserAgent()) {
  return WECOM_WEBVIEW_PATTERN.test(userAgent);
}

export function isEnterpriseMessengerContainer(userAgent = readUserAgent()) {
  return ENTERPRISE_IM_PATTERN.test(userAgent);
}

export function isTouchSmallScreen() {
  if (!canUseWindow()) {
    return false;
  }

  return window.navigator.maxTouchPoints > 0 && matchesMedia("(max-width: 768px)");
}

export function shouldPreferMobileWorkplace() {
  return isEnterpriseMessengerContainer() || isTouchSmallScreen();
}

export function resolveDefaultWorkspacePath() {
  return shouldPreferMobileWorkplace() ? "/mobile" : "/portal";
}

function encodeSegment(value: string) {
  return encodeURIComponent(value);
}

export function resolveMobileEquivalentPath(pathname: string, search = "") {
  const normalizedPath = pathname.replace(/\/+$/, "") || "/";
  const searchParams = new URLSearchParams(search.startsWith("?") ? search.slice(1) : search);

  if (normalizedPath === "/" || normalizedPath === "/portal" || normalizedPath === "/dashboard") {
    return "/mobile";
  }

  if (normalizedPath === "/notifications") {
    return "/mobile/notifications";
  }

  if (normalizedPath === "/settings/profile") {
    return "/mobile/profile";
  }

  if (normalizedPath === "/reimbursements" || normalizedPath === "/reimbursements/dashboard") {
    return "/mobile/reimbursements";
  }

  const reimbursementPrintMatch = normalizedPath.match(/^\/reimbursements\/([^/]+)\/print$/);
  if (reimbursementPrintMatch?.[1]) {
    return `/mobile/reimbursements/${encodeSegment(reimbursementPrintMatch[1])}`;
  }

  const reimbursementDetailMatch = normalizedPath.match(/^\/reimbursements\/([^/]+)$/);
  if (reimbursementDetailMatch?.[1]) {
    return `/mobile/reimbursements/${encodeSegment(reimbursementDetailMatch[1])}`;
  }

  if (normalizedPath === "/leave-requests") {
    const leaveRequestId = searchParams.get("highlight") ?? searchParams.get("id") ?? searchParams.get("requestId");
    if (leaveRequestId) {
      return `/mobile/leave/${encodeSegment(leaveRequestId)}`;
    }
    const action = searchParams.get("action") ?? searchParams.get("view");
    if (action === "create" || action === "form") {
      return "/mobile/leave?view=form";
    }
    return "/mobile/leave";
  }

  if (normalizedPath === "/invoice-pool") {
    return "/mobile/capture";
  }

  if (normalizedPath === "/attendance") {
    return "/mobile/attendance";
  }

  const workflowTaskMatch = normalizedPath.match(/^\/workflow\/tasks\/([^/]+)$/);
  if (workflowTaskMatch?.[1]) {
    return `/mobile/approvals/${encodeSegment(workflowTaskMatch[1])}`;
  }

  if (normalizedPath === "/workflow/tasks") {
    return "/mobile/approvals";
  }

  if (normalizedPath === "/assets" || normalizedPath.startsWith("/assets/") || normalizedPath === "/inventory-checks") {
    return "/mobile/assets/scan";
  }

  if (
    normalizedPath.startsWith("/system") ||
    normalizedPath.startsWith("/people") ||
    normalizedPath.startsWith("/organization") ||
    normalizedPath.startsWith("/payroll") ||
    normalizedPath.startsWith("/performance")
  ) {
    return "/mobile/me";
  }

  if (
    normalizedPath.startsWith("/projects") ||
    normalizedPath.startsWith("/contracts-registry") ||
    normalizedPath.startsWith("/travel-requests") ||
    normalizedPath.startsWith("/ap-operations") ||
    normalizedPath.startsWith("/weekly-reports") ||
    normalizedPath.startsWith("/todos") ||
    normalizedPath.startsWith("/team") ||
    normalizedPath.startsWith("/budgets") ||
    normalizedPath.startsWith("/announcements") ||
    normalizedPath.startsWith("/delegations")
  ) {
    return "/mobile";
  }

  if (normalizedPath === "/payment-batches") {
    return `/mobile/payment-batches${search}`;
  }

  if (normalizedPath === "/purchase-requests") {
    const purchaseRequestId = searchParams.get("highlight") ?? searchParams.get("id") ?? searchParams.get("requestId");
    if (purchaseRequestId) {
      return `/mobile/purchase-requests/${encodeSegment(purchaseRequestId)}`;
    }
    return "/mobile/purchase-requests";
  }

  const purchaseRequestDetailMatch = normalizedPath.match(/^\/purchase-requests\/([^/]+)$/);
  if (purchaseRequestDetailMatch?.[1]) {
    return `/mobile/purchase-requests/${encodeSegment(purchaseRequestDetailMatch[1])}`;
  }

  return search ? `${pathname}${search}` : pathname;
}