import {z} from 'zod'

export type GetApiQodArgs = {category?: unknown | undefined, language?: unknown | undefined, id?: unknown | undefined};

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

export const qOD = z.object({author: z.string().optional(), quote: z.string(), tags: z.array(z.string()).optional(), id: z.string(), image: z.string().optional(), length: z.number().int().optional(), date: z.string(), title: z.string().optional()});

export const qODResponse = z.object({success: z.string().optional(), contents: z.object({quotes: z.array(qOD).optional()}).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
};

/**
 * Gets `Quote of the Day` (QOD). Optional `category` param determines the category of returned quote of the day
 * 
 * GET /qod
 */
export const getApiQod = async (args: GetApiQodArgs, options?: GetApiQodOptions) => {
const {baseUrl = "https://quotes.rest", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.category != null) query.append("category", String(args.category))
if (args.language != null) query.append("language", String(args.language))
if (args.id != null) query.append("id", String(args.id))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

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