import {z} from 'zod'

export type V2ThreadsPostRequest = {title?: string | undefined, member_ids: Array<string>};

export type CreateApiV2ThreadsArgs = {body: V2ThreadsPostRequest};

export type CreateApiV2ThreadsOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const avatarUrls = z.object({xs: z.string(), sm: z.string(), base: z.string(), lg: z.string(), xl: z.string(), xxl: z.string()});

export const v2Author = z.object({avatar_urls: avatarUrls, name: z.string(), id: z.string(), type: z.enum(["app", "member"])});

export const v2MessageThread = z.object({id: z.string(), created_at: z.string(), updated_at: z.string(), group: z.boolean(), last_message_at: z.string().nullable(), members_count: z.number(), avatar_urls: avatarUrls.nullable(), title: z.string(), creator: v2Author});

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
};

/**
 * Create thread
 * 
 * POST /v2/threads
 */
export const createApiV2Threads = async (args: CreateApiV2ThreadsArgs, options?: CreateApiV2ThreadsOptions) => {
const {baseUrl = "https://api.campsite.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/threads${query.size > 0 ? `?${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(v2MessageThread, await res.json())
};