import {z} from 'zod'

export type NameString = string;

export type GetApiSourcesArgs = {name?: string | undefined, size?: number | undefined, country?: NameString | undefined, region?: NameString | undefined, subregion?: NameString | undefined};

export type GetApiSourcesOptions = {baseUrl?: string | undefined, OAuth2?: string | undefined, fetch?: typeof fetch | undefined};

export const resourceId = z.string();

export const source = z.object({id: resourceId, name: z.string(), country: z.string().optional(), subregion: z.string().optional(), region: z.string().optional()});

export const sourcesResponse = z.object({sources: z.array(source)});

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
};

/**
 * Search publication sources
 * 
 * GET /sources
 */
export const getApiSources = async (args: GetApiSourcesArgs, options?: GetApiSourcesOptions) => {
const {baseUrl = "https://api.signal-ai.com", fetch: fetchFn = fetch, OAuth2} = options ?? {}

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

if (args.name != null) query.append("name", String(args.name))
if (args.size != null) query.append("size", String(args.size))
if (args.country != null) query.append("country", String(args.country))
if (args.region != null) query.append("region", String(args.region))
if (args.subregion != null) query.append("subregion", String(args.subregion))
if (OAuth2 !== undefined) headers.set('authorization', `Bearer ${OAuth2}`)

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