import {z} from 'zod'

export type GetApiV1GoogleHotelsSearchArgs = {q: string, check_in: string, check_out: string, adults?: number | undefined, children?: number | undefined, currency?: string | undefined, gl?: string | undefined, hl?: string | undefined, sort_by?: (string | null) | undefined, min_price?: (number | null) | undefined, max_price?: (number | null) | undefined, hotel_class?: (number | null) | undefined, next_page_token?: (string | null) | undefined};

export type GetApiV1GoogleHotelsSearchOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const gpsCoordinates = z.object({lat: z.number(), lng: z.number()});

export const hotelRate = z.object({lowest: z.number().nullable().optional(), extracted: z.number().nullable().optional(), currency: z.string().nullable().optional()});

export const hotelPrice = z.object({source: z.string(), price: z.number().nullable().optional(), currency: z.string().nullable().optional(), link: z.string().nullable().optional(), cancellation_policy: z.string().nullable().optional()});

export const hotelNearbyPlace = z.object({name: z.string(), transport: z.string().nullable().optional(), duration: z.string().nullable().optional()});

export const hotelProperty = z.object({name: z.string(), description: z.string().nullable().optional(), address: z.string().nullable().optional(), gps_coordinates: gpsCoordinates.nullable().optional(), hotel_class: z.number().int().nullable().optional(), eco_certified: z.boolean().optional(), check_in_time: z.string().nullable().optional(), check_out_time: z.string().nullable().optional(), overall_rating: z.number().nullable().optional(), reviews_count: z.number().int().nullable().optional(), rate_per_night: hotelRate.nullable().optional(), total_rate: hotelRate.nullable().optional(), prices: z.array(hotelPrice).optional(), nearby_places: z.array(hotelNearbyPlace).optional(), amenities: z.array(z.string()).optional(), images: z.array(z.string()).optional(), property_token: z.string().nullable().optional(), thumbnail: z.string().nullable().optional()});

export const pagination = z.object({current: z.union([z.number().int(), z.string()]).optional(), next: z.string().nullable().optional(), total_results: z.number().int().nullable().optional(), total_pages: z.number().int().nullable().optional(), page_no: z.record(z.string(), z.string()).optional()});

export const hotelsSearchResponse = z.object({properties: z.array(hotelProperty).optional(), pagination: pagination});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Search Google Hotels
 * 
 * GET /v1/google/hotels/search
 */
export const getApiV1GoogleHotelsSearch = async (args: GetApiV1GoogleHotelsSearchArgs, options?: GetApiV1GoogleHotelsSearchOptions) => {
const {baseUrl = "https://scrapebadger.com", fetch: fetchFn = fetch, apiKey} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (args.q != null) query.append("q", String(args.q))
if (args.check_in != null) query.append("check_in", String(args.check_in))
if (args.check_out != null) query.append("check_out", String(args.check_out))
if (args.adults != null) query.append("adults", String(args.adults))
if (args.children != null) query.append("children", String(args.children))
if (args.currency != null) query.append("currency", String(args.currency))
if (args.gl != null) query.append("gl", String(args.gl))
if (args.hl != null) query.append("hl", String(args.hl))
if (args.sort_by != null) query.append("sort_by", String(args.sort_by))
if (args.min_price != null) query.append("min_price", String(args.min_price))
if (args.max_price != null) query.append("max_price", String(args.max_price))
if (args.hotel_class != null) query.append("hotel_class", String(args.hotel_class))
if (args.next_page_token != null) query.append("next_page_token", String(args.next_page_token))
if (apiKey !== undefined) headers.set("x-api-key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/google/hotels/search${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(hotelsSearchResponse, await res.json())
};