import {z} from 'zod'

export type OptionalSearchSetting = 'always' | 'never' | 'auto';

export type DocumentSource = 'ingestion_api' | 'slack' | 'web' | 'google_drive' | 'gmail' | 'requesttracker' | 'github' | 'gitlab' | 'guru' | 'bookstack' | 'confluence' | 'discourse' | 'slab' | 'salesforce' | 'jira' | 'productboard' | 'file' | 'notion' | 'zulip' | 'linear' | 'hubspot' | 'document360' | 'gong' | 'google_sites' | 'zendesk' | 'loopio' | 'sharepoint' | 'teams' | 'freshdesk';

export type Tag = {tag_key: string, tag_value: string};

export type BaseFilters = {source_type?: Array<DocumentSource> | undefined, document_set?: Array<string> | undefined, time_cutoff?: string | undefined, tags?: Array<Tag> | undefined};

export type RetrievalDetails = {run_search?: OptionalSearchSetting | undefined, real_time?: boolean | undefined, filters?: BaseFilters | undefined, enable_auto_detect_filters?: boolean | undefined, offset?: number | undefined, limit?: number | undefined};

export type CreateChatMessageRequest = {chat_session_id: number, parent_message_id?: number | undefined, message: string, prompt_id?: number | undefined, search_doc_ids?: Array<number> | undefined, retrieval_options?: RetrievalDetails | undefined, query_override?: string | undefined, no_ai_answer?: boolean | undefined};

export type CreateApiChatSendMessageArgs = {body: CreateChatMessageRequest};

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

export const createApiChatSendMessageResponse = z.unknown();

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
};

/**
 * Handle New Chat Message
 * 
 * POST /chat/send-message
 */
export const createApiChatSendMessage = async (args: CreateApiChatSendMessageArgs, options: CreateApiChatSendMessageOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyCookie} = options ?? {}

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

if (APIKeyCookie !== undefined) cookies.push("fastapiusersauth=" + encodeURIComponent(APIKeyCookie))

const url = `${baseUrl.replace(/\/+$/, '')}/chat/send-message${query.size > 0 ? `?${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(createApiChatSendMessageResponse, await res.json())
};