import {z} from 'zod'

export type GetApiApiV1TranslationsLangArgs = {lang: string};

export type GetApiApiV1TranslationsLangOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const translationTerm = z.object({term: z.string(), contexts: z.object({prose: z.object({term: z.string(), example: z.string().optional()}).optional(), heading: z.object({term: z.string()}).optional(), tag: z.object({term: z.string()}).optional(), ui: z.object({term: z.string()}).optional()}).optional(), plurals: z.object({one: z.string().nullable(), two: z.string().nullable().optional(), few: z.string().nullable().optional(), many: z.string().nullable().optional(), other: z.string().nullable()}).optional(), grammar: z.object({gender: z.string().optional(), partOfSpeech: z.string().optional(), formality: z.string().optional()}).optional(), confidence: z.enum(["high", "medium", "low"]), notes: z.string().optional()});

export const translationFile = z.object({language: z.string(), termCount: z.number(), terms: z.record(z.string(), translationTerm)});

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
};

/**
 * Full glossary for a language
 * 
 * GET /api/v1/translations/{lang}
 */
export const getApiApiV1TranslationsLang = async (args: GetApiApiV1TranslationsLangArgs, options?: GetApiApiV1TranslationsLangOptions) => {
const {baseUrl = "https://glossary.ethereum.org", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/translations/${encodeURIComponent(String(args.lang))}${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(translationFile, await res.json())
};