import {z} from 'zod'

export type GetApiTranslationContentPathArgs = {content_path: string, includeDocuments?: boolean | undefined, status?: ('linked' | 'suggested' | 'all') | undefined, view?: ('detailed' | 'simple') | undefined};

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

export const detailedTranslationTarget = z.object({path: z.string().optional(), locale: z.string().optional(), status: z.enum(["linked", "suggested"]).optional()});

export const detailedTranslationSource = z.object({path: z.string().optional(), type: z.enum(["document", "page", "folder"]).optional(), translations: z.array(detailedTranslationTarget).optional()});

export const simpleTranslationSource = z.object({path: z.string().optional(), translations: z.array(z.string()).optional()});

export const getApiTranslationContentPathResponse = z.union([detailedTranslationSource, z.array(detailedTranslationSource), z.array(simpleTranslationSource)]);

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 translations of the content
 * 
 * GET /translation/{content_path}
 */
export const getApiTranslationContentPath = async (args: GetApiTranslationContentPathArgs, options?: GetApiTranslationContentPathOptions) => {
const {baseUrl = "https://developers.bloomreach.io/delivery/site/v2/documents", fetch: fetchFn = fetch} = options ?? {}

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

if (args.includeDocuments != null) query.append("includeDocuments", String(args.includeDocuments))
if (args.status != null) query.append("status", String(args.status))
if (args.view != null) query.append("view", String(args.view))

const url = `${baseUrl.replace(/\/+$/, '')}/translation/${encodeURIComponent(String(args.content_path))}${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(getApiTranslationContentPathResponse, await res.json())
};