/**
 * Discovery API Service
 * Handles product, service, and community listing discovery/search
 */

const API_BASE_URL = import.meta.env.VITE_API_BASE_URL || '/api/v1';

export interface SearchQuery {
  query?: string;
  categories?: string[];
  latitude?: number;
  longitude?: number;
  radius_km?: number;
  max_price?: number;
  min_price?: number;
  availability_status?: string;
  tags?: string[];
  limit?: number;
  offset?: number;
}

export interface DiscoveryMatch {
  product?: Product;
  service?: Service;
  community_listing?: CommunityListing;
  match_type: 'product' | 'service' | 'community';
  relevance_score: number;
  text_match_score: number;
  category_match_score: number;
  distance_score: number;
  price_match_score: number;
  availability_score: number;
  distance_km: number;
  organization?: Organization;
  site?: Site;
}

export interface Product {
  ID: string;
  Name: string;
  Category: string;
  Description: string;
  UnitPrice: number;
  MOQ: number;
  AvailabilityStatus: string;
  Images: string[];
  Tags: string[];
  OrganizationID: string;
  SiteID?: string;
  Location?: {
    Latitude: number;
    Longitude: number;
  };
}

export interface Service {
  ID: string;
  Type: string;
  Domain: string;
  Description: string;
  HourlyRate: number;
  ServiceAreaKm: number;
  AvailabilityStatus: string;
  AvailabilitySchedule?: {
    [day: string]: {
      startTime: string;
      endTime: string;
      isAvailable: boolean;
    };
  };
  Tags: string[];
  OrganizationID: string;
  SiteID?: string;
  ServiceLocation?: {
    Latitude: number;
    Longitude: number;
  };
}

export interface CommunityListing {
  id: string;
  user_id: string;
  title: string;
  description: string;
  listing_type: 'product' | 'service' | 'tool' | 'skill' | 'need';
  category: string;
  price?: number;
  price_type?: 'free' | 'sale' | 'rent' | 'trade' | 'borrow';
  availability_status: string;
  location?: {
    latitude: number;
    longitude: number;
  };
  images: string[];
  tags: string[];
}

export interface Organization {
  id: string;
  name: string;
}

export interface Site {
  id: string;
  name: string;
  latitude: number;
  longitude: number;
}

export interface UniversalSearchResponse {
  query: SearchQuery;
  product_matches: DiscoveryMatch[];
  service_matches: DiscoveryMatch[];
  community_matches: DiscoveryMatch[];
  total: number;
}

export interface SearchResponse {
  matches: DiscoveryMatch[];
  total: number;
}

/**
 * Build query string from SearchQuery object
 */
function buildQueryString(params: SearchQuery): string {
  const searchParams = new URLSearchParams();

  if (params.query) searchParams.append('query', params.query);
  if (params.categories) {
    params.categories.forEach((cat) => searchParams.append('categories', cat));
  }
  if (params.latitude !== undefined) searchParams.append('latitude', params.latitude.toString());
  if (params.longitude !== undefined) searchParams.append('longitude', params.longitude.toString());
  if (params.radius_km !== undefined) searchParams.append('radius_km', params.radius_km.toString());
  if (params.max_price !== undefined) searchParams.append('max_price', params.max_price.toString());
  if (params.min_price !== undefined) searchParams.append('min_price', params.min_price.toString());
  if (params.availability_status)
    searchParams.append('availability_status', params.availability_status);
  if (params.tags) {
    params.tags.forEach((tag) => searchParams.append('tags', tag));
  }
  if (params.limit !== undefined) searchParams.append('limit', params.limit.toString());
  if (params.offset !== undefined) searchParams.append('offset', params.offset.toString());

  return searchParams.toString();
}

/**
 * Universal search across products, services, and community listings
 */
export async function universalSearch(query: SearchQuery): Promise<UniversalSearchResponse> {
  const queryString = buildQueryString(query);
  const response = await fetch(`${API_BASE_URL}/discovery/search?${queryString}`);

  if (!response.ok) {
    throw new Error(`Search failed: ${response.statusText}`);
  }

  return response.json();
}

/**
 * Search products
 */
export async function searchProducts(query: SearchQuery): Promise<SearchResponse> {
  const queryString = buildQueryString(query);
  const response = await fetch(`${API_BASE_URL}/discovery/products?${queryString}`);

  if (!response.ok) {
    throw new Error(`Product search failed: ${response.statusText}`);
  }

  return response.json();
}

/**
 * Search services
 */
export async function searchServices(query: SearchQuery): Promise<SearchResponse> {
  const queryString = buildQueryString(query);
  const response = await fetch(`${API_BASE_URL}/discovery/services?${queryString}`);

  if (!response.ok) {
    throw new Error(`Service search failed: ${response.statusText}`);
  }

  return response.json();
}

/**
 * Search community listings
 */
export async function searchCommunity(query: SearchQuery): Promise<SearchResponse> {
  const queryString = buildQueryString(query);
  const response = await fetch(`${API_BASE_URL}/discovery/community?${queryString}`);

  if (!response.ok) {
    throw new Error(`Community search failed: ${response.statusText}`);
  }

  return response.json();
}

/**
 * Create community listing request/response types
 */
export interface CreateCommunityListingRequest {
  title: string;
  description?: string;
  listing_type: 'product' | 'service' | 'tool' | 'skill' | 'need';
  category: string;
  subcategory?: string;
  condition?: 'new' | 'like_new' | 'good' | 'fair' | 'needs_repair';
  price?: number;
  price_type?: 'free' | 'sale' | 'rent' | 'trade' | 'borrow';
  quantity?: number;
  service_type?: string;
  rate?: number;
  rate_type?: string;
  latitude?: number;
  longitude?: number;
  pickup_available?: boolean;
  delivery_available?: boolean;
  delivery_radius_km?: number;
  images?: string[];
  tags?: string[];
}

/**
 * Create a community listing
 */
export async function createCommunityListing(
  listing: CreateCommunityListingRequest
): Promise<CommunityListing> {
  const response = await fetch(`${API_BASE_URL}/discovery/community`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    credentials: 'include', // Include auth cookies
    body: JSON.stringify(listing),
  });

  if (!response.ok) {
    throw new Error(`Failed to create community listing: ${response.statusText}`);
  }

  return response.json();
}

/**
 * Get available categories for discovery search
 */
export interface CategoriesResponse {
  products: string[];
  services: string[];
  community: string[];
}

export async function getCategories(): Promise<CategoriesResponse> {
  const response = await fetch(`${API_BASE_URL}/discovery/categories`, {
    method: 'GET',
    headers: {
      'Content-Type': 'application/json',
    },
  });

  if (!response.ok) {
    throw new Error(`Failed to fetch categories: ${response.statusText}`);
  }

  return response.json();
}