// -----------------------------------------------------------------------------
// Author: Simon-Pierre Boucher
// Contact: contact@spboucher.ai
// Project: Groupe Ka / Ka Maps (Home-Ka integration)
// kamaps/adapter.ts : Home-Ka → MapProperty adapter. Viewport-driven data via
// /api/listings.geojson?bbox=… (cancellable requests, never a storm).
// -----------------------------------------------------------------------------
import type {
  BoundsQuery,
  BoundsQueryResult,
  KaAppSource,
  KaDataAdapter,
  MapProperty,
} from "@groupe-ka/ka-maps";
import { bboxToString } from "@groupe-ka/ka-maps";
import type { ListingFilters } from "../api";

/** ka-maps ships a closed KaAppSource union (pre-Home-Ka) — cast our id. */
export const HOMEKA_APP_SOURCE = "home-ka" as KaAppSource;

interface HomeKaFeatureProps {
  uid: string;
  title: string | null;
  address: string | null;
  price: number | null;
  price_label: string | null;
  property_type: string | null;
  bedrooms: number | null;
  bathrooms: number | null;
  source: string;
  city: string | null;
  state: string | null;
  image: string | null;
}

interface HomeKaFC {
  type: "FeatureCollection";
  features: {
    geometry: { coordinates: [number, number] };
    properties: HomeKaFeatureProps;
  }[];
  totalGeocoded?: number;
  totalMatching?: number;
}

function toMapProperty(
  coords: [number, number],
  p: HomeKaFeatureProps,
): MapProperty {
  return {
    id: p.uid,
    appSource: HOMEKA_APP_SOURCE,
    longitude: coords[0],
    latitude: coords[1],
    kind: "listing",
    listingType: "sale",
    price: p.price ?? undefined,
    propertyType: p.property_type ?? undefined,
    bedrooms: p.bedrooms ?? undefined,
    bathrooms: p.bathrooms ?? undefined,
    address: p.address ?? p.title ?? undefined,
    city: p.city ?? undefined,
    region: p.state ?? undefined,
    thumbnailUrl: p.image ?? undefined,
    originalUrl: `/property/${encodeURIComponent(p.uid)}`,
    extra: {
      title: p.title,
      priceLabel: p.price_label,
      source: p.source,
      state: p.state,
    },
  };
}

/** Viewport→data adapter for the Home-Ka map. */
export const homeKaMapAdapter: KaDataAdapter = {
  id: "home-ka-listings",
  appSource: HOMEKA_APP_SOURCE,
  async fetchInBounds(query: BoundsQuery): Promise<BoundsQueryResult> {
    const params = new URLSearchParams();
    const filters = (query.filters ?? {}) as Partial<ListingFilters>;
    for (const [k, v] of Object.entries(filters)) {
      if (v && k !== "sort") params.set(k, String(v));
    }
    params.set("bbox", bboxToString(query.bbox));
    params.set("limit", "3000");

    const res = await fetch(`/api/listings.geojson?${params}`, {
      signal: query.signal,
    });
    if (!res.ok) throw new Error(`Map: API ${res.status}`);
    const data = (await res.json()) as HomeKaFC;

    return {
      properties: data.features.map((f) =>
        toMapProperty(f.geometry.coordinates, f.properties),
      ),
      totalCount: data.totalMatching,
    };
  },
};