import {z} from 'zod'

export type RequestInfo = {requestId: string};

export type EventUser = {displayName: string, corporateEmail: string, phone?: string | undefined, companyName?: string | undefined, userType?: ('initiator' | 'initiatedOBO' | 'affectedUser' | 'recipient') | undefined, identityType?: ('Internal' | 'External' | 'Bot') | undefined};

export type ConversationProperty = {name: string, value: string, xheader?: boolean | undefined, hidden?: boolean | undefined};

export type ConversationOverview = {conversationId: string, initiatorName: string, initiatorEmail: string, title?: string | undefined, description?: string | undefined, isExternal?: boolean | undefined, isPrivate?: boolean | undefined, initialParticipants?: Array<EventUser> | undefined, conversationProperties?: Array<ConversationProperty> | undefined, subjectOverride?: string | undefined};

export type Eventcontent = {textType?: ('plain' | 'html' | 'markdown') | undefined, message: string};

export type FileInfo = {filename: string, fileKey: string, fileHref?: string | undefined, isInlined?: boolean | undefined, transcribable?: boolean | undefined};

export type ConversationEvent = {eventTime?: number | undefined, eventType?: ('File_transfer' | 'Invitation' | 'Message' | 'Admin_event' | 'User_joined' | 'User_left' | 'Message_edited' | 'Message_deleted' | 'User_removed' | 'User_event' | 'Reaction' | 'Meeting_event' | 'Context_reply') | undefined, childEvents?: Array<ConversationEvent> | undefined, participants?: Array<EventUser> | undefined, content?: Eventcontent | undefined, systemText?: string | undefined, files?: Array<FileInfo> | undefined};

export type CreateConversationPayload = {requestInfo: RequestInfo, conversationOverview: ConversationOverview, conversationEvents?: Array<ConversationEvent> | undefined};

export type CreateApiV2ConversationsArgs = {'X-SubType': string, body: CreateConversationPayload};

export type CreateApiV2ConversationsOptions = {baseUrl?: string | undefined, oAuth2ClientCredentials?: string | undefined, fetch?: typeof fetch | undefined};

export const createConversationResponse = z.object({reconciliationId: z.string()});

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
};

/**
 * POST a single conversation message
 * 
 * POST /v2/conversations
 */
export const createApiV2Conversations = async (args: CreateApiV2ConversationsArgs, options?: CreateApiV2ConversationsOptions) => {
const {baseUrl = "https://conversations.api.globalrelay.com/v2/conversations", fetch: fetchFn = fetch, oAuth2ClientCredentials} = options ?? {}

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

if (args['X-SubType'] != null) headers.set("X-SubType", String(args['X-SubType']))
if (oAuth2ClientCredentials !== undefined) headers.set('authorization', `Bearer ${oAuth2ClientCredentials}`)

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