import {z} from 'zod'

export type Channel = 'widget_chat' | 'phone' | 'voice_mail' | 'email' | 'contact_form' | 'callback' | 'facebook_messenger';

export type Direction = 'outbound' | 'inbound' | 'internal';

export type StringId = string;

export type CreateCallbackConversationInput = {channel: Channel, direction: Direction, queue_id: StringId, requester_id: StringId, endpoint_id: StringId, tags?: Array<string> | undefined};

export type CreateContactFormConversationInput = {channel: Channel, requester_id: StringId, email_integration_id: StringId, tags?: Array<string> | undefined, subject?: string | undefined, message?: ({text: string, content_type?: ('Text' | 'Markdown' | 'Html') | undefined}) | undefined};

export type CreateConversationInput = CreateCallbackConversationInput | CreateContactFormConversationInput;

export type CreateApiV1ConversationsArgs = {body: CreateConversationInput};

export type CreateApiV1ConversationsOptions = {baseUrl: string, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const timestamp = z.string();

export const stringId = z.string();

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

export const direction = z.enum(["outbound", "inbound", "internal"]);

export const status = z.enum(["open", "closed", "pending", "awaiting_pending"]);

export const conversation = z.object({id: z.number().int(), created_at: timestamp, requester_id: stringId, channel: channel, direction: direction, queued_at: timestamp.optional(), queue_id: stringId.optional(), status: status, status_updated_at: timestamp.optional(), attributes: z.object({}).optional(), assigned_to: stringId.optional(), assigned_at: timestamp.optional()});

export const createApiV1ConversationsResponse = z.object({data: conversation});

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
};

/**
 * Create a conversation
 * 
 * POST /v1/conversations
 * 
 * Also accepts auth: BearerAuth
 */
export const createApiV1Conversations = async (args: CreateApiV1ConversationsArgs, options: CreateApiV1ConversationsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/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(createApiV1ConversationsResponse, await res.json())
};