import {z} from 'zod'

export type GetApiV1ConversationsCsidMessagesArgs = {csid: number};

export type GetApiV1ConversationsCsidMessagesOptions = {baseUrl: string, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const stringId = z.string();

export const timestamp = z.string();

export const channel = z.enum(["widget_chat", "phone", "voice_mail", "email", "contact_form", "callback", "facebook_messenger"]);

export const messageAttributes = z.object({text: z.string().optional(), to_emails: z.string().optional(), cc_email: z.string().optional(), from_email: z.string().optional(), inline_images: z.string().optional(), attachments: z.string().optional(), direction: z.string().optional(), a_phone_number: z.string().optional(), b_phone_number: z.string().optional(), is_automated_message: z.string().optional(), is_auto_reply: z.string().optional()});

export const message = z.object({id: stringId, created_at: timestamp, author_id: stringId, channel: channel, direction: channel.optional(), attributes: messageAttributes.optional()});

export const getApiV1ConversationsCsidMessagesResponse = z.object({data: z.array(message)});

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 a list of messages within a conversation
 * 
 * GET /v1/conversations/{csid}/messages
 * 
 * Also accepts auth: BearerAuth
 */
export const getApiV1ConversationsCsidMessages = async (args: GetApiV1ConversationsCsidMessagesArgs, options: GetApiV1ConversationsCsidMessagesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set("Authorization", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/conversations/${encodeURIComponent(String(args.csid))}/messages${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(getApiV1ConversationsCsidMessagesResponse, await res.json())
};