import {z} from 'zod'

export type ChatStatus = 'READ' | 'UNREAD';

export type ChatCreate = {primaryPatientId: string, phoneNumber: string, status?: ChatStatus | undefined};

export type CreateApiCommsChatCreateArgs = {TENANT: string, 'API-KEY': string, body: ChatCreate};

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

export const chatStatus = z.enum(["READ", "UNREAD"]);

export const chatPatient = z.object({id: z.string(), firstName: z.string().nullable(), lastName: z.string().nullable(), primaryLocationId: z.string().nullable()});

export const chatSummary = z.object({id: z.string(), primaryPatientId: z.string().nullable(), status: chatStatus, patients: z.array(chatPatient), phoneNumber: z.string(), latestMessageContent: z.string().nullable().optional(), latestMessageDate: z.string().nullable().optional(), createdDate: z.string(), optedOutOfSms: z.boolean()});

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 Chat
 * 
 * POST /comms/chat/create
 */
export const createApiCommsChatCreate = async (args: CreateApiCommsChatCreateArgs, options: CreateApiCommsChatCreateOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.TENANT != null) headers.set("TENANT", String(args.TENANT))
if (args['API-KEY'] != null) headers.set("API-KEY", String(args['API-KEY']))

const url = `${baseUrl.replace(/\/+$/, '')}/comms/chat/create${query.size > 0 ? `?${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(chatSummary, await res.json())
};