import {z} from 'zod'

export type ApplicationReference = string;

export type GetApiV1ApplicationsApplicationReferenceEstimateCompletionDateArgs = {application_reference: ApplicationReference};

export type GetApiV1ApplicationsApplicationReferenceEstimateCompletionDateOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const applicationReference = z.string();

export const applicationStatus = z.enum(["DELAYED", "CANCELLED", "RECEIVED", "COMPLETED"]);

export const eCDStatus = z.enum(["AVAILABLE", "CALCULATING", "EXCEEDED", "UNAVAILABLE", "NOT_APPLICABLE"]);

export const eCD = z.object({date: z.string().optional(), probability: z.number().gte(0).lte(1).optional()});

export const eCDResponseData = z.object({application_reference: applicationReference, application_status: applicationStatus, application_priority_date: z.string(), estimated_completion_date_status: eCDStatus, estimated_completion_dates: z.array(eCD).optional()});

export const getApiV1ApplicationsApplicationReferenceEstimateCompletionDateResponse = z.object({data: eCDResponseData});

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 estimate completion date of associated application reference
 * 
 * GET /v1/applications/{application_reference}/estimate-completion-date
 */
export const getApiV1ApplicationsApplicationReferenceEstimateCompletionDate = async (args: GetApiV1ApplicationsApplicationReferenceEstimateCompletionDateArgs, options?: GetApiV1ApplicationsApplicationReferenceEstimateCompletionDateOptions) => {
const {baseUrl = "https://businessgateway.landregistry.gov.uk/bg2/api", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/applications/${encodeURIComponent(String(args.application_reference))}/estimate-completion-date${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(getApiV1ApplicationsApplicationReferenceEstimateCompletionDateResponse, await res.json())
};