import {z} from 'zod'

export type GetApiV2IndustriesSimilarArgs = {industries: Array<string>, page?: number | undefined, size?: number | undefined};

export type GetApiV2IndustriesSimilarOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const paginationMeta = z.object({cost: z.number(), credits: z.number(), currentPage: z.number(), firstPage: z.number(), freeRequest: z.boolean(), lastPage: z.number(), maxScrollResultsReached: z.boolean().optional(), perPage: z.number(), total: z.number()});

export const getApiV2IndustriesSimilarResponse = z.object({industries: z.array(z.object({companiesCount: z.number().nullable(), name: z.string(), slug: z.unknown()})), meta: paginationMeta});

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 similar industries from one or many industries.
 * 
 * GET /v2/industries/similar
 */
export const getApiV2IndustriesSimilar = async (args: GetApiV2IndustriesSimilarArgs, options?: GetApiV2IndustriesSimilarOptions) => {
const {baseUrl = "https://api.thecompaniesapi.com", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

for (const item of args.industries ?? []) query.append("industries", String(item))
if (args.page != null) query.append("page", String(args.page))
if (args.size != null) query.append("size", String(args.size))
if (apiKey !== undefined) headers.set("Authorization", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/industries/similar${query.size > 0 ? `?${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(getApiV2IndustriesSimilarResponse, await res.json())
};