import type { InboxItem, InboxKind, InboxState, Message, Ticket, TicketPriority, TicketState } from "@lynkd/messaging-inbox-sdk";

/**
 * Map IIOS API shapes → this app's SDK types. Written defensively because the
 * exact field names live in the IIOS codebase; adjust as you wire real responses.
 * (Keep the UI contract = SDK types; do all translation here in the BFF.)
 */

const ts = (v: any): number => {
  if (typeof v === "number") return v;
  if (typeof v === "string") { const t = Date.parse(v); if (!Number.isNaN(t)) return t; }
  return Date.now();
};

export function toMessage(m: any, channelId: string): Message {
  const text =
    m.content ??
    m.body ??
    (Array.isArray(m.parts) ? m.parts.find((p: any) => (p.kind ?? p.partType) === "TEXT")?.bodyText : undefined) ??
    "";
  return {
    id: String(m.id ?? m.messageId ?? m.interactionId),
    channelId,
    authorId: String(m.senderActorId ?? m.actorId ?? m.authorId ?? m.source?.externalId ?? "unknown"),
    ts: ts(m.sentAt ?? m.occurredAt ?? m.createdAt ?? m.ts),
    body: String(text),
    parentId: m.parentInteractionId ?? m.parentId ?? null,
    reactions: [],
    deliveryState: "sent",
  };
}

const inboxKind = (k: any): InboxKind => {
  const up = String(k ?? "").toUpperCase();
  const known: InboxKind[] = ["NEEDS_REPLY", "MENTION", "REACTION", "THREAD_REPLY", "SAVED", "APP", "SUPPORT_UPDATE", "MEETING_FOLLOWUP"];
  return (known.includes(up as InboxKind) ? up : "NEEDS_REPLY") as InboxKind;
};

export function toInboxItem(i: any): InboxItem {
  return {
    id: String(i.id),
    kind: inboxKind(i.kind),
    state: (String(i.state ?? "OPEN").toUpperCase() as InboxState),
    title: String(i.title ?? i.subject ?? "Inbox item"),
    preview: String(i.preview ?? i.snippet ?? ""),
    channelId: i.conversationId ?? i.threadId ?? undefined,
    messageId: i.messageId ?? undefined,
    actorId: i.actorId ?? i.createdByActorId ?? undefined,
    ts: ts(i.createdAt ?? i.ts),
    dueAt: i.dueAt ? ts(i.dueAt) : undefined,
    priority: i.priority ? (String(i.priority).toLowerCase() as InboxItem["priority"]) : "normal",
  };
}

export function toTicket(t: any): Ticket {
  return {
    id: String(t.id),
    ref: String(t.ref ?? t.id),
    subject: String(t.subject ?? ""),
    requesterId: String(t.requesterActorId ?? t.requesterId ?? "unknown"),
    assigneeId: t.assigneeActorId ?? t.assigneeId ?? undefined,
    state: (String(t.state ?? "NEW").toUpperCase() as TicketState),
    priority: (String(t.priority ?? "NORMAL").toUpperCase() as TicketPriority),
    channelId: t.threadId ?? t.conversationId ?? undefined,
    category: t.klass ?? t.category ?? undefined,
    createdTs: ts(t.createdAt),
    updatedTs: ts(t.updatedAt ?? t.createdAt),
    slaBreached: !!t.slaBreached,
    tags: t.tags ?? undefined,
    messages: Array.isArray(t.messages) ? t.messages.map((m: any) => toMessage(m, `t_${t.id}`)) : [],
  };
}