"use client";

import { setCurrentSubject } from "@/lib/current-subject";
import {
  chatProfileChoice,
  chatProfileDisplayName,
  chatProfileSelectedId,
  chatSessionSubjectLocked,
  type ChatProfileCatalogStatus,
  type ChatProfilePickerRow,
} from "@/lib/chat-profile-picker-model";
import type { ChartLibraryRecord, ChatSession } from "@/lib/home-types";
import { SubjectSwitcher } from "@/components/subject-switcher";

export type ChatProfilePickerProps = {
  readonly session: ChatSession;
  readonly library: readonly ChartLibraryRecord[];
  readonly status: ChatProfileCatalogStatus;
  readonly requestInFlight: boolean;
  readonly onBindEmpty: (chartProfileId: string) => Promise<boolean>;
  readonly onOpenNew: (chartProfileId: string) => Promise<boolean>;
  readonly onReload: () => void;
};

export function ChatProfilePicker({
  session,
  library,
  status,
  requestInFlight,
  onBindEmpty,
  onOpenNew,
  onReload,
}: ChatProfilePickerProps) {
  const label = chatProfileDisplayName({ session, status, library });
  const selectedId = chatProfileSelectedId(session);
  const locked = chatSessionSubjectLocked(session);
  const deleted = status === "ready" && Boolean(selectedId) && selectedId !== "self" && !library.some((record) => (
    record.role === "other" && record.id === selectedId
  ));

  async function choose(row: ChatProfilePickerRow): Promise<boolean> {
    const choice = chatProfileChoice({
      session,
      chartProfileId: row.id,
      requestInFlight,
      libraryReady: status === "ready",
      selectable: row.complete,
    });
    if (choice.action === "ignore") return false;
    setCurrentSubject(choice.chartProfileId);
    if (choice.action === "bind") return onBindEmpty(choice.chartProfileId);
    return onOpenNew(choice.chartProfileId);
  }

  return (
    <SubjectSwitcher
      library={library}
      status={status}
      selectedId={selectedId}
      label={label}
      locked={locked}
      requestInFlight={requestInFlight}
      deleted={deleted}
      onChoose={choose}
      onReload={onReload}
    />
  );
}