import {z} from 'zod'

export type GetApiV3DiaryShortNameAllocationsArgs = {shortName: string, preferredDate: string, appointmentType: string, lettings?: boolean | undefined, propertyIdentifier?: string | undefined, branchID?: string | undefined};

export type GetApiV3DiaryShortNameAllocationsOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const diaryBookingModel = z.object({Start: z.string().optional(), End: z.string().optional(), StaffName: z.string().optional(), StaffID: z.string().optional()});

export const getApiV3DiaryShortNameAllocationsResponse = z.array(diaryBookingModel);

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
};

/**
 * Get a list of all available allocations for a date + 7 days for a specified appointment type
 * 
 * GET /v3/diary/{shortName}/allocations
 */
export const getApiV3DiaryShortNameAllocations = async (args: GetApiV3DiaryShortNameAllocationsArgs, options?: GetApiV3DiaryShortNameAllocationsOptions) => {
const {baseUrl = "https://live-api.letmc.com", fetch: fetchFn = fetch} = options ?? {}

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

if (args.preferredDate != null) query.append("preferredDate", String(args.preferredDate))
if (args.appointmentType != null) query.append("appointmentType", String(args.appointmentType))
if (args.lettings != null) query.append("lettings", String(args.lettings))
if (args.propertyIdentifier != null) query.append("propertyIdentifier", String(args.propertyIdentifier))
if (args.branchID != null) query.append("branchID", String(args.branchID))

const url = `${baseUrl.replace(/\/+$/, '')}/v3/diary/${encodeURIComponent(String(args.shortName))}/allocations${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiV3DiaryShortNameAllocationsResponse, await res.json())
};