import {z} from 'zod'

export type MailboxProvider = 'gmail' | 'microsoft';

export type EmailAddress = {address: string, name?: (string | null) | undefined};

export type WireAttachment = {storage_object_id: string, filename: string, content_type: string, size_bytes: number, disposition?: ('inline' | 'attachment') | undefined, content_id?: (string | null) | undefined};

export type EmailInboundEvent = {organization_id: string, account_id: string, provider: MailboxProvider, provider_thread_id: string, provider_message_id: string, rfc822_message_id: string, in_reply_to?: (string | null) | undefined, references?: Array<string> | undefined, from: EmailAddress, to?: Array<EmailAddress> | undefined, cc?: Array<EmailAddress> | undefined, reply_to?: Array<EmailAddress> | undefined, subject: string, body_text?: (string | null) | undefined, body_html?: (string | null) | undefined, headers?: Array<Array<unknown>> | undefined, attachments?: Array<WireAttachment> | undefined, mime_size_bytes?: (number | null) | undefined, raw_storage_object_id?: (string | null) | undefined, received_at: string, received_idempotency_key: string};

export type IngestEmailThreadRequest = {event: EmailInboundEvent};

export type CreateApiV1EmailThreadsThreadIdArgs = {thread_id: string, body: IngestEmailThreadRequest};

export type CreateApiV1EmailThreadsThreadIdOptions = {baseUrl: string, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const ingestEmailThreadResponse = z.object({outcome: z.enum(["reply", "observe", "archive", "drop", "duplicate"]), reason: z.string().nullable().optional(), session_id: z.string().nullable().optional(), user_turn_id: z.string().nullable().optional(), assistant_turn_id: z.string().nullable().optional(), draft_id: z.string().nullable().optional(), auto_dispatched: z.boolean().optional()});

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
};

/**
 * Ingest a canonical EmailInboundEvent for the given thread. Bypasses the vendor webhook; used by sandbox / replay / direct integrators.
 * 
 * POST /v1/email/threads/{thread_id}
 */
export const createApiV1EmailThreadsThreadId = async (args: CreateApiV1EmailThreadsThreadIdArgs, options: CreateApiV1EmailThreadsThreadIdOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
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: "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(ingestEmailThreadResponse, await res.json())
};