/**
 * Dashboard Utilities
 * Helper functions for dashboard data processing and formatting
 */

import {
  invoiceActivityMetadataSchema,
  serviceActivityMetadataSchema,
  type Activity,
  // Re-export business logic from domain
  ACTIVITY_FILTERS,
  filterActivities,
  isActivityClickable,
  generateQuickActions,
  type QuickActionTask,
  type DashboardTaskSummary,
} from "@customer-portal/domain/dashboard";
import { Formatting } from "@customer-portal/domain/toolkit";

// Re-export domain business logic for backward compatibility
export {
  ACTIVITY_FILTERS,
  filterActivities,
  isActivityClickable,
  generateQuickActions,
  type QuickActionTask,
  type DashboardTaskSummary,
};

const formatCurrencyUtil = Formatting.formatCurrency;

/**
 * Get navigation path for an activity
 */
export function getActivityNavigationPath(activity: Activity): string | null {
  if (!isActivityClickable(activity) || !activity.relatedId) {
    return null;
  }

  switch (activity.type) {
    case "invoice_created":
    case "invoice_paid":
      return `/account/billing/invoices/${activity.relatedId}`;
    case "service_activated":
      return `/account/subscriptions/${activity.relatedId}`;
    case "case_created":
    case "case_closed":
      return `/account/support/${activity.relatedId}`;
    default:
      return null;
  }
}

/**
 * Format activity date for display
 */
export function formatActivityDate(date: string): string {
  try {
    const activityDate = new Date(date);
    const now = new Date();
    const diffInHours = (now.getTime() - activityDate.getTime()) / (1000 * 60 * 60);

    if (diffInHours < 1) {
      const diffInMinutes = Math.floor(diffInHours * 60);
      return diffInMinutes <= 1 ? "Just now" : `${diffInMinutes} minutes ago`;
    } else if (diffInHours < 24) {
      const hours = Math.floor(diffInHours);
      return `${hours} hour${hours === 1 ? "" : "s"} ago`;
    } else if (diffInHours < 48) {
      return "Yesterday";
    } else {
      return activityDate.toLocaleDateString("en-US", {
        month: "short",
        day: "numeric",
        year: activityDate.getFullYear() === now.getFullYear() ? undefined : "numeric",
      });
    }
  } catch {
    return "Unknown date";
  }
}

function formatInvoiceActivity(activity: Activity): string | null {
  const parsed = invoiceActivityMetadataSchema.safeParse(activity.metadata ?? {});
  if (!parsed.success || typeof parsed.data.amount !== "number") {
    return null;
  }

  const formattedAmount = formatCurrencyUtil(parsed.data.amount, parsed.data.currency);
  if (!formattedAmount) {
    return null;
  }

  return activity.type === "invoice_paid"
    ? `${formattedAmount} payment completed`
    : `${formattedAmount} invoice generated`;
}

function formatServiceActivity(activity: Activity): string | null {
  const parsed = serviceActivityMetadataSchema.safeParse(activity.metadata ?? {});
  if (!parsed.success || !parsed.data.productName) {
    return null;
  }
  return `${parsed.data.productName} is now active`;
}

export function formatActivityDescription(activity: Activity): string {
  const fallback = activity.description ?? "";

  switch (activity.type) {
    case "invoice_created":
    case "invoice_paid":
      return formatInvoiceActivity(activity) ?? fallback;
    case "service_activated":
      return formatServiceActivity(activity) ?? fallback;
    default:
      return fallback;
  }
}

/**
 * Truncate text to specified length
 */
export function truncateText(text: string, maxLength = 28): string {
  if (text.length <= maxLength) {
    return text;
  }
  return text.slice(0, Math.max(0, maxLength - 1)) + "…";
}

/**
 * Calculate dashboard loading progress
 */
export function calculateLoadingProgress(loadingStates: Record<string, boolean>): number {
  const states = Object.values(loadingStates);
  const completedCount = states.filter(loading => !loading).length;
  return Math.round((completedCount / states.length) * 100);
}