import {
  aggregateAcrossTeams,
  formatAggregationResult,
  loopGet,
} from "../lib/loop-api.js";

// ─── Loop API V2: /residential/{dept}/viewings ─────────────────
// Fields: id, propertyId, propertyAddress, status,
//   dateOfAppointment, dateOfAppointmentEnd,
//   attendingAgentId, creatingAgentId, type, buyerName
// ────────────────────────────────────────────────────────────────
interface LoopViewingSummary {
  id: number;
  propertyId?: number;
  propertyAddress?: string;
  status?: string;
  dateOfAppointment?: string;
  dateOfAppointmentEnd?: string;
  attendingAgentId?: string;
  creatingAgentId?: string;
  type?: string;
  buyerName?: string;
  [key: string]: unknown;
}

type Department = "sales" | "lettings" | "both";

export async function viewingSearch(params: {
  accountId: string;
  department?: Department;
  searchTerm?: string;
  appointmentStartDate?: string;
  appointmentEndDate?: string;
  status?: string;
  teamName?: string;
  limit?: number;
}): Promise<string> {
  const {
    accountId, department = "both", searchTerm,
    appointmentStartDate, appointmentEndDate, status,
    teamName, limit,
  } = params;

  const result = await aggregateAcrossTeams<LoopViewingSummary>(
    accountId,
    "viewings",
    "loop-viewing-search",
    async (apiKey, team) => {
      const depts: string[] =
        department === "both" ? ["sales", "lettings"] : [department];
      const all: LoopViewingSummary[] = [];

      for (const dept of depts) {
        const qp: string[] = [];
        if (searchTerm) qp.push(`SearchTerm=${encodeURIComponent(searchTerm)}`);
        if (appointmentStartDate) qp.push(`AppointmentStartDate=${encodeURIComponent(appointmentStartDate)}`);
        if (appointmentEndDate) qp.push(`AppointmentEndDate=${encodeURIComponent(appointmentEndDate)}`);
        if (status) qp.push(`Status=${encodeURIComponent(status)}`);

        const query = qp.length > 0 ? `?${qp.join("&")}` : "";
        const path = `/residential/${dept}/viewings${query}`;
        const data = await loopGet<LoopViewingSummary[]>(apiKey, path, "loop-viewing-search", team);
        if (Array.isArray(data)) all.push(...data);
      }
      return all;
    },
    { teamName, limitPerTeam: limit ?? 50, limitTotal: limit ?? 200 }
  );

  return formatAggregationResult(
    result,
    (v) => {
      const addr = v.propertyAddress ?? "Unknown property";
      const id = v.id != null ? ` [ID: ${v.id}]` : "";
      // dateOfAppointment is ISO datetime e.g. "2026-04-10T15:30:00"
      const when = v.dateOfAppointment
        ? formatDateTime(v.dateOfAppointment)
        : "No date";
      const viewStatus = v.status ? ` [${v.status}]` : "";
      const buyer = v.buyerName ? ` — ${v.buyerName}` : "";
      const viewType = v.type ? ` (${v.type})` : "";
      return `- ${addr}${id} — ${when}${viewType}${buyer}${viewStatus}`;
    },
    "viewings"
  );
}

function formatDateTime(iso: string): string {
  const [datePart, timePart] = iso.split("T");
  if (!timePart) return datePart;
  return `${datePart} ${timePart.slice(0, 5)}`;
}