import {z} from 'zod'

export type PeerType = 'Group' | 'Channel';

export type GetApiV1ChannelsSearchArgs = {term?: string | undefined, search_in_about?: boolean | undefined, peer_type?: PeerType | undefined, country?: string | undefined, language?: string | undefined, category?: string | undefined, limit?: number | undefined, skip?: number | undefined};

export type GetApiV1ChannelsSearchOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const peerType = z.enum(["Group", "Channel"]);

export const chatShort = z.object({internal_id: z.string(), peer: peerType, title: z.string(), photo_url: z.string().nullable().optional(), country: z.string().nullable().optional(), language: z.string().nullable().optional(), category: z.string().nullable().optional(), members_count: z.number().int().gte(0), verified: z.boolean()});

export const getApiV1ChannelsSearchResponse = z.array(chatShort);

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
 * 
 * GET /v1/channels/search
 */
export const getApiV1ChannelsSearch = async (args: GetApiV1ChannelsSearchArgs, options?: GetApiV1ChannelsSearchOptions) => {
const {baseUrl = "https://api.tlmtr.io", fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.term != null) query.append("term", String(args.term))
if (args.search_in_about != null) query.append("search_in_about", String(args.search_in_about))
if (args.peer_type != null) query.append("peer_type", String(args.peer_type))
if (args.country != null) query.append("country", String(args.country))
if (args.language != null) query.append("language", String(args.language))
if (args.category != null) query.append("category", String(args.category))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.skip != null) query.append("skip", String(args.skip))
if (apiKey !== undefined) headers.set("x-api-key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/channels/search${query.size > 0 ? `?${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(getApiV1ChannelsSearchResponse, await res.json())
};