import { apiClient } from './api-client';

// ─── Types ──────────────────────────────────────────────

export interface ValuationRequest {
  propertyType: string;
  area: number;
  district: string;
  city: string;
  bedrooms?: number;
  bathrooms?: number;
  floors?: number;
  frontage?: number;
  roadWidth?: number;
  yearBuilt?: number;
  hasLegalPaper?: boolean;
  latitude?: number;
  longitude?: number;
}

export interface ValuationComparable {
  id: string;
  title: string;
  address: string;
  district: string;
  priceVND: string;
  areaM2: number;
  pricePerM2: number;
  similarity: number;
  latitude?: number;
  longitude?: number;
}

export interface PriceDriver {
  feature: string;
  impact: number;
  direction: 'positive' | 'negative';
}

export interface ValuationResult {
  id: string;
  estimatedPriceVND: number;
  confidence: number;
  pricePerM2: number;
  priceRangeLow: number;
  priceRangeHigh: number;
  comparables: ValuationComparable[];
  priceDrivers: PriceDriver[];
  modelVersion: string;
  createdAt: string;
}

export interface ValuationHistoryItem {
  id: string;
  propertyType: string;
  district: string;
  city: string;
  area: number;
  estimatedPriceVND: number;
  confidence: number;
  createdAt: string;
}

export interface ValuationHistoryResponse {
  data: ValuationHistoryItem[];
  total: number;
  page: number;
  limit: number;
}

// ─── API ────────────────────────────────────────────────

export const valuationApi = {
  /** Request AVM estimate via GET /analytics/valuation */
  predict: (data: ValuationRequest) => {
    const params = new URLSearchParams();
    if (data.latitude) params.set('latitude', String(data.latitude));
    if (data.longitude) params.set('longitude', String(data.longitude));
    if (data.area) params.set('areaM2', String(data.area));
    if (data.propertyType) params.set('propertyType', data.propertyType);
    const qs = params.toString();
    return apiClient.get<ValuationResult>(`/analytics/valuation${qs ? `?${qs}` : ''}`);
  },

  /** History is not available server-side — return empty result */
  getHistory: (_page = 1, _limit = 10): Promise<ValuationHistoryResponse> =>
    Promise.resolve({ data: [], total: 0, page: _page, limit: _limit }),

  getById: (id: string) =>
    apiClient.get<ValuationResult>(`/analytics/valuation?propertyId=${id}`),

  predictForListing: (listingId: string) =>
    apiClient.get<ValuationResult>(`/analytics/valuation?propertyId=${listingId}`),
};