// -----------------------------------------------------------------------------
// Author: Simon-Pierre Boucher
// Contact: contact@spboucher.ai
// Project: Groupe Ka / Ka Maps (Rent-Ka integration)
// kamaps/adapter.ts: Rent-Ka data adapter → MapProperty.
// Transforms /api/listings.geojson (bbox + filters) into the framework's
// canonical model — the Rent-Ka domain stays in the app, the map knows nothing.
// -----------------------------------------------------------------------------
import type {
  BoundsQuery,
  BoundsQueryResult,
  KaDataAdapter,
  MapProperty,
} from "@groupe-ka/ka-maps";
import { bboxToString } from "@groupe-ka/ka-maps";
import type { ListingFilters } from "../api";

interface LouKaFeatureProps {
  uid: string;
  title: string | null;
  address: string | null;
  price: number | null;
  price_label: string | null;
  unit_type: string | null;
  availability_date: string | null;
  source: string;
  city: string | null;
  sector: string | null;
  area_sqft: number | null;
  image: string | null;
}

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

function toMapProperty(
  coords: [number, number],
  p: LouKaFeatureProps,
): MapProperty {
  return {
    id: p.uid,
    appSource: "rent-ka",
    longitude: coords[0],
    latitude: coords[1],
    kind: "listing",
    listingType: "rent",
    price: p.price ?? undefined,
    propertyType: p.unit_type ?? undefined,
    address: p.address ?? p.title ?? undefined,
    city: p.city ?? undefined,
    region: p.sector ?? undefined,
    thumbnailUrl: p.image ?? undefined,
    originalUrl: `/listing/${encodeURIComponent(p.uid)}`,
    extra: {
      title: p.title,
      priceLabel: p.price_label,
      availabilityDate: p.availability_date,
      source: p.source,
      areaSqft: p.area_sqft,
      sector: p.sector,
    },
  };
}

/** Viewport→data adapter for the Rent-Ka map. */
export const louKaMapAdapter: KaDataAdapter = {
  id: "rent-ka-listings",
  appSource: "rent-ka",
  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) 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 LouKaFC;

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