import {z} from 'zod'

export type LookUpRequest = {source_language: string, target_language: string, word: string};

export type CreateApiDictionariesProviderLookupArgs = {provider: , body: LookUpRequest};

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

export const textTranslation = z.object({detected_source_language: z.string().optional(), text: z.string(), audio_url: z.string().optional()});

export const wordTag = z.object({name: z.string()});

export const wordDefinition = z.object({type: z.string().optional(), name: z.string().optional(), values: z.array(z.string()).optional()});

export const wordPronunciation = z.object({type: z.string().optional(), phonetic_symbol: z.string().optional(), audio_url: z.string().optional()});

export const wordImage = z.object({url: z.string()});

export const wordPhrase = z.object({text: z.string(), translations: z.array(z.string())});

export const wordTense = z.object({type: z.string().optional(), name: z.string().optional(), values: z.array(z.string()).optional()});

export const wordSentence = z.object({text: z.string(), translations: z.array(z.string())});

export const lookUpResponse = z.object({translations: z.array(textTranslation), word: z.string().optional(), tip: z.string().optional(), tags: z.array(wordTag).optional(), definitions: z.array(wordDefinition).optional(), pronunciations: z.array(wordPronunciation).optional(), images: z.array(wordImage).optional(), phrases: z.array(wordPhrase).optional(), tenses: z.array(wordTense).optional(), sentences: z.array(wordSentence).optional()});

export const lookUpResponseEnvelope = z.object({success: z.literal(true), data: lookUpResponse});

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
};

/**
 * Lookup a dictionary entry
 * 
 * POST /dictionaries/{provider}/lookup
 */
export const createApiDictionariesProviderLookup = async (args: CreateApiDictionariesProviderLookupArgs, options: CreateApiDictionariesProviderLookupOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/dictionaries/${encodeURIComponent(String(args.provider))}/lookup${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(lookUpResponseEnvelope, await res.json())
};