import {z} from 'zod'

export type GetApiV1GoogleScholarAuthorArgs = {author_id: string, hl?: string | undefined, cstart?: number | undefined, pagesize?: number | undefined};

export type GetApiV1GoogleScholarAuthorOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const scholarAuthorInfo = z.object({author_id: z.string(), name: z.string(), affiliations: z.array(z.string()).optional(), email_domain: z.string().nullable().optional(), interests: z.array(z.string()).optional(), thumbnail: z.string().nullable().optional(), homepage: z.string().nullable().optional()});

export const scholarAuthorArticle = z.object({title: z.string(), link: z.string().nullable().optional(), authors: z.string().nullable().optional(), publication: z.string().nullable().optional(), cited_by_count: z.number().int().nullable().optional(), cited_by_link: z.string().nullable().optional(), year: z.number().int().nullable().optional()});

export const scholarAuthorStats = z.object({citations_all: z.number().int().nullable().optional(), citations_since_year: z.number().int().nullable().optional(), h_index_all: z.number().int().nullable().optional(), h_index_since_year: z.number().int().nullable().optional(), i10_index_all: z.number().int().nullable().optional(), i10_index_since_year: z.number().int().nullable().optional(), since_year: z.number().int().nullable().optional()});

export const scholarCoAuthor = z.object({author_id: z.string().nullable().optional(), name: z.string(), affiliation: z.string().nullable().optional(), link: z.string().nullable().optional()});

export const scholarAuthorResponse = z.object({author: scholarAuthorInfo, articles: z.array(scholarAuthorArticle).optional(), stats: scholarAuthorStats.nullable().optional(), co_authors: z.array(scholarCoAuthor).optional()});

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
};

/**
 * Get Google Scholar author profile
 * 
 * GET /v1/google/scholar/author
 */
export const getApiV1GoogleScholarAuthor = async (args: GetApiV1GoogleScholarAuthorArgs, options?: GetApiV1GoogleScholarAuthorOptions) => {
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.author_id != null) query.append("author_id", String(args.author_id))
if (args.hl != null) query.append("hl", String(args.hl))
if (args.cstart != null) query.append("cstart", String(args.cstart))
if (args.pagesize != null) query.append("pagesize", String(args.pagesize))
if (apiKey !== undefined) headers.set("x-api-key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/google/scholar/author${query.size > 0 ? `?${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(scholarAuthorResponse, await res.json())
};