/**
 * Device contacts import (mobile). Reads the OS address book via the
 * `ulti-core` contacts plugin (Android ContactsContract / iOS Contacts) and
 * maps to the shared `ContactImportInput` shape used by the import dialog.
 */
import { invoke } from "@/lib/native/bridge"
import { isTauriRuntime } from "@/lib/platform"
import type { ContactImportInput } from "@/lib/contacts/import-parsers"

type DeviceContact = {
  display_name?: string | null
  first_name?: string | null
  last_name?: string | null
  emails: string[]
  phones: string[]
  organization?: string | null
}

function splitDisplayName(name: string): { firstName: string; lastName: string } {
  const parts = name.trim().split(/\s+/)
  if (parts.length <= 1) return { firstName: parts[0] ?? "", lastName: "" }
  return { firstName: parts[0], lastName: parts.slice(1).join(" ") }
}

function toImportInput(c: DeviceContact): ContactImportInput {
  let firstName = c.first_name ?? ""
  let lastName = c.last_name ?? ""
  if (!firstName && !lastName && c.display_name) {
    const parts = splitDisplayName(c.display_name)
    firstName = parts.firstName
    lastName = parts.lastName
  }
  return {
    firstName,
    lastName,
    company: c.organization ?? undefined,
    emails: c.emails.map((value) => ({ value, label: "personal" })),
    phones: c.phones.map((value) => ({ value, label: "mobile" })),
  }
}

/** True when device contacts import is available (native runtime). */
export function deviceContactsAvailable(): boolean {
  return isTauriRuntime()
}

/** Fetch device contacts. Throws a coded error if unsupported/denied. */
export async function fetchDeviceContacts(): Promise<ContactImportInput[]> {
  const list = await invoke<DeviceContact[]>("plugin:ulti-core|contacts_fetch")
  if (!list) throw new Error("contacts_unavailable")
  return list.map(toImportInput)
}