import {z} from 'zod'

export type CreateApiMessagesInteractiveFlowArgs = {body: {from: string, to: string, interactive: {type?: 'flow' | undefined, header?: ({type: 'text' | 'image' | 'video' | 'document'}) | undefined, body: {text: string}, footer?: {text: string} | undefined, action: {name?: 'flow' | undefined, parameters: {flow_cta: string, flow_name: string, flow_message_version?: number | undefined, flow_action?: ('navigate' | 'data_exchange') | undefined, flow_action_payload?: {[key: string]: unknown} | undefined, flow_token?: string | undefined}}}}};

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

export const createApiMessagesInteractiveFlowResponse = z.object({id: 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
};

/**
 * Send interactive flow message
 * 
 * POST /messages/interactive/flow
 */
export const createApiMessagesInteractiveFlow = async (args: CreateApiMessagesInteractiveFlowArgs, options?: CreateApiMessagesInteractiveFlowOptions) => {
const {baseUrl = "https://messenger-public-api.cogfy.com", 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("api-key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/messages/interactive/flow${query.size > 0 ? `?${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(createApiMessagesInteractiveFlowResponse, await res.json())
};