import {z} from 'zod'

export type GetApiApiV1SlackChannelsArgs = {search?: string | undefined, excludeArchived?: boolean | undefined, excludeDms?: boolean | undefined, excludeGroups?: boolean | undefined, forceRefresh?: boolean | undefined, includeChannelIds?: string | undefined};

export type GetApiApiV1SlackChannelsOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const slackChannel = z.object({name: z.string(), id: z.string()});

export const apiSlackChannelsResponse = z.object({results: z.array(slackChannel).optional(), status: z.literal("ok")});

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 Slack channels
 * 
 * GET /api/v1/slack/channels
 */
export const getApiApiV1SlackChannels = async (args: GetApiApiV1SlackChannelsArgs, options: GetApiApiV1SlackChannelsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.search != null) query.append("search", String(args.search))
if (args.excludeArchived != null) query.append("excludeArchived", String(args.excludeArchived))
if (args.excludeDms != null) query.append("excludeDms", String(args.excludeDms))
if (args.excludeGroups != null) query.append("excludeGroups", String(args.excludeGroups))
if (args.forceRefresh != null) query.append("forceRefresh", String(args.forceRefresh))
if (args.includeChannelIds != null) query.append("includeChannelIds", String(args.includeChannelIds))

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