import {z} from 'zod'

export type TitleNumber = string;

export type GetApiTitlesTitleNumberOfficialCopiesAvailabilityArgs = {title_number: TitleNumber};

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

export const titleNumber = z.string().max(9);

export const officialCopyAvailabilityCode = z.enum(["IMMEDIATE", "MANUAL", "UNAVAILABLE"]);

export const referredDocumentAvailability = z.object({type: z.string(), type_code: z.string(), entry_numbers: z.array(z.string()), date: z.string().nullable().optional(), filed_under: z.string().max(9).nullable(), availability: z.string(), availability_code: officialCopyAvailabilityCode});

export const registerAvailability = z.object({type: z.string(), type_code: z.literal("REGISTER"), availability: z.string(), availability_code: officialCopyAvailabilityCode, backdated: z.boolean()});

export const titlePlanAvailability = z.object({type: z.string(), type_code: z.literal("TITLEPLAN"), availability: z.string(), availability_code: officialCopyAvailabilityCode, backdated: z.boolean()});

export const officialCopiesResponse = z.object({title_status: z.string(), title_status_code: z.enum(["VALID", "CLOSED", "CLOSED_AND_CONTINUED", "NOT_COMPUTERISED", "PENDING_APPLICATIONS", "PENDING_DEALING", "PENDING_FIRST", "SCHEME"]), title_number: titleNumber, applications_pending: z.boolean(), continued_under_title_number: z.string().optional(), referred_to_documents: z.array(referredDocumentAvailability), register: registerAvailability, title_plan: titlePlanAvailability});

export const getApiTitlesTitleNumberOfficialCopiesAvailabilityResponse = z.object({data: officialCopiesResponse});

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 document availability associated with a title number.
 * 
 * GET /titles/{title_number}/official-copies/availability
 */
export const getApiTitlesTitleNumberOfficialCopiesAvailability = async (args: GetApiTitlesTitleNumberOfficialCopiesAvailabilityArgs, options?: GetApiTitlesTitleNumberOfficialCopiesAvailabilityOptions) => {
const {baseUrl = "https://businessgateway.landregistry.gov.uk/bg2/api/v1", 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 = `${baseUrl.replace(/\/+$/, '')}/titles/${encodeURIComponent(String(args.title_number))}/official-copies/availability${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(getApiTitlesTitleNumberOfficialCopiesAvailabilityResponse, await res.json())
};