import {z} from 'zod'

export type GetApiPotsPotIdAboutArgs = {pot_id: string};

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

export const pOTAboutTheme = z.object({theme: z.string(), count: z.number().int()});

export const pOTAboutDetail = z.object({text: z.string().nullable().optional(), source: z.enum(["generated", "manual"]).nullable().optional(), updated_at: z.string().nullable().optional(), suggestion_pending: z.boolean().optional(), language: z.string().nullable().optional(), themes: z.array(pOTAboutTheme).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
};

/**
 * The POT's «about» and the themes it comes from
 * 
 * GET /pots/{pot_id}/about
 */
export const getApiPotsPotIdAbout = async (args: GetApiPotsPotIdAboutArgs, options: GetApiPotsPotIdAboutOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/pots/${encodeURIComponent(String(args.pot_id))}/about${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(pOTAboutDetail, await res.json())
};