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

// ─── Loop API V2: /residential/{dept}/viewings/{id} ────────────
// Fields: id, dateCreated, dateOfAppointment, dateOfAppointmentEnd,
//   dateBuyerFeedbackGiven, dateSellerFeedbackGiven, dateDone,
//   status, type, comment, buyerFeedback, sellerFeedback,
//   buyerConfirmed, sellerConfirmed, agentConfirmed,
//   property (nested PropertySummary), buyer (nested BuyerSummary),
//   seller (nested SellerSummary),
//   attendingAgent (nested TeamMember), creatingAgent (nested TeamMember),
//   teamId
// ────────────────────────────────────────────────────────────────
interface LoopViewingDetail {
  id: number;
  dateCreated?: string;
  dateOfAppointment?: string;
  dateOfAppointmentEnd?: string;
  dateBuyerFeedbackGiven?: string | null;
  dateSellerFeedbackGiven?: string | null;
  dateDone?: string | null;
  status?: string;
  type?: string;
  comment?: string | null;
  buyerFeedback?: string | null;
  sellerFeedback?: string | null;
  buyerConfirmed?: boolean;
  sellerConfirmed?: boolean;
  agentConfirmed?: boolean;
  property?: {
    id: number;
    propertyAddress?: string;
    status?: string;
    propertyType?: string;
    price?: number;
    bedrooms?: number;
    [key: string]: unknown;
  };
  buyer?: {
    id: number;
    buyerGroupName?: string;
    maxPrice?: number | null;
    position?: string;
    viewingCount?: number;
    offerCount?: number;
    [key: string]: unknown;
  };
  seller?: {
    id: number;
    sellerGroupName?: string;
    propertyAddress?: string;
    price?: number;
    [key: string]: unknown;
  };
  attendingAgent?: {
    id: string;
    firstName?: string;
    lastName?: string;
    email?: string;
    mobilePhone?: string;
    jobTitle?: string;
    [key: string]: unknown;
  };
  creatingAgent?: {
    id: string;
    firstName?: string;
    lastName?: string;
    [key: string]: unknown;
  };
  teamId?: string;
  [key: string]: unknown;
}

type Department = "sales" | "lettings";

export async function viewingDetail(params: {
  accountId: string;
  viewingId: number;
  department: Department;
  teamName?: string;
}): Promise<string> {
  const { accountId, viewingId, department, teamName } = params;

  const result = await aggregateAcrossTeams<LoopViewingDetail>(
    accountId,
    "viewings",
    "loop-viewing-detail",
    async (apiKey, team) => {
      const path = `/residential/${department}/viewings/${viewingId}`;
      const data = await loopGet<LoopViewingDetail>(apiKey, path, "loop-viewing-detail", team);
      if (data && typeof data === "object" && !Array.isArray(data)) {
        return [data];
      }
      return [];
    },
    { teamName }
  );

  return formatAggregationResult(
    result,
    (v) => {
      const propAddr = v.property?.propertyAddress ?? "Unknown property";
      const lines = [`**${propAddr}** [Viewing ID: ${v.id}]`];

      // Appointment time
      if (v.dateOfAppointment) {
        const start = formatDateTime(v.dateOfAppointment);
        const end = v.dateOfAppointmentEnd ? formatDateTime(v.dateOfAppointmentEnd) : "";
        lines.push(`Date/Time: ${start}${end ? ` — ${end}` : ""}`);
      }
      if (v.status) lines.push(`Status: ${v.status}`);
      if (v.type) lines.push(`Type: ${v.type}`);

      // Confirmation status
      const confirmParts: string[] = [];
      if (v.buyerConfirmed != null) confirmParts.push(`Buyer: ${v.buyerConfirmed ? "yes" : "no"}`);
      if (v.sellerConfirmed != null) confirmParts.push(`Seller: ${v.sellerConfirmed ? "yes" : "no"}`);
      if (v.agentConfirmed != null) confirmParts.push(`Agent: ${v.agentConfirmed ? "yes" : "no"}`);
      if (confirmParts.length) lines.push(`Confirmed — ${confirmParts.join(", ")}`);

      // Property details
      if (v.property) {
        const prop = v.property;
        if (prop.price != null) lines.push(`Property price: £${prop.price.toLocaleString("en-GB")}`);
        if (prop.propertyType) lines.push(`Property type: ${prop.propertyType}`);
        if (prop.bedrooms != null) lines.push(`Bedrooms: ${prop.bedrooms}`);
        if (prop.id) lines.push(`Property ID: ${prop.id}`);
      }

      // Buyer
      if (v.buyer) {
        const b = v.buyer;
        lines.push(`\n**Buyer:** ${b.buyerGroupName ?? "Unknown"} [ID: ${b.id}]`);
        if (b.maxPrice != null) lines.push(`  Max price: £${b.maxPrice.toLocaleString("en-GB")}`);
        if (b.position && b.position !== "none") lines.push(`  Position: ${b.position}`);
      }

      // Seller
      if (v.seller) {
        const s = v.seller;
        lines.push(`\n**Seller:** ${s.sellerGroupName ?? "Unknown"} [ID: ${s.id}]`);
      }

      // Attending agent
      if (v.attendingAgent) {
        const a = v.attendingAgent;
        const agentName = [a.firstName, a.lastName].filter(Boolean).join(" ");
        const title = a.jobTitle ? ` (${a.jobTitle})` : "";
        const contact = a.email ?? a.mobilePhone ?? "";
        lines.push(`\n**Attending agent:** ${agentName}${title}${contact ? ` — ${contact}` : ""}`);
      }

      // Feedback
      if (v.buyerFeedback) lines.push(`\nBuyer feedback: ${v.buyerFeedback}`);
      if (v.sellerFeedback) lines.push(`Seller feedback: ${v.sellerFeedback}`);
      if (v.comment) lines.push(`Notes: ${v.comment}`);

      return lines.join("\n");
    },
    "viewing details"
  );
}

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