import {z} from 'zod'

export type GetApiV1GooglePatentsSearchArgs = {q: string, page?: number | undefined, num?: number | undefined, sort?: ('new' | 'old' | null) | undefined, inventor?: (string | null) | undefined, assignee?: (string | null) | undefined, country?: (string | null) | undefined, language?: ('ENGLISH' | 'GERMAN' | 'CHINESE' | 'FRENCH' | 'JAPANESE' | 'KOREAN' | 'SPANISH' | null) | undefined, status?: ('GRANT' | 'APPLICATION' | null) | undefined, patent_type?: ('PATENT' | 'DESIGN' | null) | undefined, before?: (string | null) | undefined, after?: (string | null) | undefined};

export type GetApiV1GooglePatentsSearchOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const patentFigure = z.object({url: z.string(), thumbnail: z.string().nullable().optional()});

export const patentResult = z.object({title: z.string(), snippet: z.string().nullable().optional(), patent_id: z.string(), publication_number: z.string().nullable().optional(), priority_date: z.string().nullable().optional(), filing_date: z.string().nullable().optional(), grant_date: z.string().nullable().optional(), publication_date: z.string().nullable().optional(), inventor: z.string().nullable().optional(), assignee: z.string().nullable().optional(), language: z.string().nullable().optional(), thumbnail: z.string().nullable().optional(), pdf_link: z.string().nullable().optional(), link: z.string().nullable().optional(), figures: z.array(patentFigure).optional(), country_status: z.record(z.string(), z.string()).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 patentSearchResponse = z.object({results: z.array(patentResult), total_results: z.number().int().nullable().optional(), query: z.string(), 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 Patents
 * 
 * GET /v1/google/patents/search
 */
export const getApiV1GooglePatentsSearch = async (args: GetApiV1GooglePatentsSearchArgs, options?: GetApiV1GooglePatentsSearchOptions) => {
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.page != null) query.append("page", String(args.page))
if (args.num != null) query.append("num", String(args.num))
if (args.sort != null) query.append("sort", String(args.sort))
if (args.inventor != null) query.append("inventor", String(args.inventor))
if (args.assignee != null) query.append("assignee", String(args.assignee))
if (args.country != null) query.append("country", String(args.country))
if (args.language != null) query.append("language", String(args.language))
if (args.status != null) query.append("status", String(args.status))
if (args.patent_type != null) query.append("patent_type", String(args.patent_type))
if (args.before != null) query.append("before", String(args.before))
if (args.after != null) query.append("after", String(args.after))
if (apiKey !== undefined) headers.set("x-api-key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/google/patents/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(patentSearchResponse, await res.json())
};