import {z} from 'zod'

export type GetApiV1EmailThreadsThreadIdArgs = {thread_id: string};

export type GetApiV1EmailThreadsThreadIdOptions = {baseUrl: string, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const emailAddress = z.object({address: z.string().max(320), name: z.string().max(255).nullable().optional()});

export const srcCommunicationEmailThreadsSchemasMessageResponse = z.object({id: z.string(), direction: z.enum(["inbound", "outbound"]), provider_message_id: z.string().nullable(), provider_thread_id: z.string().nullable(), rfc822_message_id: z.string().nullable(), in_reply_to_header: z.string().nullable(), from_address: z.string(), to_addresses: z.array(emailAddress).optional(), cc_addresses: z.array(emailAddress).optional(), bcc_addresses: z.array(emailAddress).optional(), subject: z.string().nullable(), content: z.string(), triage_decision: z.string().nullable(), triage_reason: z.string().nullable(), delivery_status: z.string().nullable(), delivery_status_at: z.string().nullable(), sent_at: z.string().nullable(), received_at: z.string().nullable(), created_at: z.string()});

export const threadResponse = z.object({provider_thread_id: z.string(), session_id: z.string(), subject: z.string().nullable(), participants: z.array(z.string()).optional(), message_count: z.number().int(), last_message_at: z.string().nullable(), messages: z.array(srcCommunicationEmailThreadsSchemasMessageResponse)});

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
};

/**
 * Read an email thread by Nylas provider_thread_id
 * 
 * GET /v1/email/threads/{thread_id}
 */
export const getApiV1EmailThreadsThreadId = async (args: GetApiV1EmailThreadsThreadIdArgs, options: GetApiV1EmailThreadsThreadIdOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/email/threads/${encodeURIComponent(String(args.thread_id))}${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(threadResponse, await res.json())
};