/**
 * Dashboard Domain Utilities
 * Business logic for dashboard activities and task generation
 */

import type { Activity, ActivityFilter, ActivityFilterConfig, ActivityType } from "./contract.js";

/**
 * Activity filter configurations
 * Defines which activity types belong to each filter category
 */
export const ACTIVITY_FILTERS: ActivityFilterConfig[] = [
  { key: "all", label: "All" },
  {
    key: "billing",
    label: "Billing",
    types: ["invoice_created", "invoice_paid"],
  },
  {
    key: "orders",
    label: "Orders",
    types: ["service_activated"],
  },
  {
    key: "support",
    label: "Support",
    types: ["case_created", "case_closed"],
  },
];

/**
 * Filter activities by type category
 */
export function filterActivities(activities: Activity[], filter: ActivityFilter): Activity[] {
  if (filter === "all") {
    return activities;
  }

  const filterConfig = ACTIVITY_FILTERS.find(f => f.key === filter);
  if (!filterConfig?.types) {
    return activities;
  }

  return activities.filter(activity => filterConfig.types!.includes(activity.type));
}

/**
 * Activity types that support navigation to detail views
 */
const CLICKABLE_ACTIVITY_TYPES: ActivityType[] = ["invoice_created", "invoice_paid"];

/**
 * Check if an activity is clickable (has a navigable detail view)
 */
export function isActivityClickable(activity: Activity): boolean {
  return CLICKABLE_ACTIVITY_TYPES.includes(activity.type) && !!activity.relatedId;
}

/**
 * Quick action task definition for dashboard
 */
export interface QuickActionTask {
  label: string;
  href: string;
}

/**
 * Dashboard summary input for task generation
 */
export interface DashboardTaskSummary {
  nextInvoice?: { id: number } | null;
  stats?: { unpaidInvoices?: number; openCases?: number };
}

/**
 * Generate dashboard quick action suggestions based on summary data
 */
export function generateQuickActions(summary: DashboardTaskSummary): QuickActionTask[] {
  const tasks: QuickActionTask[] = [];

  if (summary.nextInvoice) {
    tasks.push({
      label: "Pay upcoming invoice",
      href: "#attention",
    });
  }

  if (summary.stats?.unpaidInvoices && summary.stats.unpaidInvoices > 0) {
    tasks.push({
      label: "Review unpaid invoices",
      href: "/billing/invoices",
    });
  }

  if (summary.stats?.openCases && summary.stats.openCases > 0) {
    tasks.push({
      label: "Check support cases",
      href: "/support/cases",
    });
  }

  return tasks;
}