import {z} from 'zod'

export type GetApiApiV0EventsBirthArgs = {forenames: string, lastname: string, dateofbirth: string};

export type GetApiApiV0EventsBirthOptions = {baseUrl?: string | undefined, bearerToken?: string | undefined, fetch?: typeof fetch | undefined};

export const v0Birth = z.object({date: z.string().optional(), location: z.object({name: z.string().optional(), nameQualifier: z.string().optional(), registrationDistrict: z.string().optional(), subDistrict: z.string().optional(), administrativeArea: z.string().optional()}), registrarSignature: z.string().optional(), type: z.string().optional(), id: z.number().int(), subjects: z.object({child: z.object({name: z.object({givenName: z.string().optional(), surname: z.string().optional(), fullName: z.string().optional(), qualifier: z.string().optional()}).optional(), birthplace: z.string().optional(), dateOfBirth: z.string().optional(), sex: z.enum(["Male", "Female", "Indeterminate"]).optional(), originalName: z.object({givenName: z.string().optional(), surname: z.string().optional(), fullName: z.string().optional(), qualifier: z.string().optional()}).optional()}).optional(), father: z.object({name: z.object({givenName: z.string().optional(), surname: z.string().optional(), fullName: z.string().optional(), qualifier: z.string().optional()}).optional(), birthplace: z.string().optional(), occupation: z.string().optional()}).optional(), mother: z.object({name: z.object({givenName: z.string().optional(), surname: z.string().optional(), fullName: z.string().optional(), qualifier: z.string().optional()}).optional(), birthplace: z.string().optional(), occupation: z.string().optional(), maidenSurname: z.string().optional(), marriageSurname: z.string().optional(), usualAddress: z.string().optional()}).optional(), informant: z.object({name: z.object({givenName: z.string().optional(), surname: z.string().optional(), fullName: z.string().optional(), qualifier: z.string().optional()}).optional(), usualAddress: z.string().optional(), qualification: z.string().optional(), signature: z.string().optional()}).optional()}), systemNumber: z.number().int().optional(), status: z.object({blockedRegistration: z.boolean(), cancelled: z.boolean().optional(), potentiallyFictitiousBirth: z.boolean().optional(), reRegistered: z.enum(["None", "Father modified", "Father added", "Replacement registration", "Other", "Subsequently married"]).optional(), correction: z.enum(["Typographical", "Simple clerical", "Complex clerical", "Error of fact", "None"]).optional(), marginalNote: z.enum(["Re-registered", "Court order in place", "Court order revoked", "Other", "None"]).optional()}), previousRegistration: z.object({date: z.string().optional(), systemNumber: z.number().int().optional()})});

export const v0Births = z.array(v0Birth);

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
};

/**
 * Search for birth records
 * 
 * GET /api/v0/events/birth
 */
export const getApiApiV0EventsBirth = async (args: GetApiApiV0EventsBirthArgs, options?: GetApiApiV0EventsBirthOptions) => {
const {baseUrl = "https://api.lev.homeoffice.gov.uk", fetch: fetchFn = fetch, bearerToken} = options ?? {}

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

if (args.forenames != null) query.append("forenames", String(args.forenames))
if (args.lastname != null) query.append("lastname", String(args.lastname))
if (args.dateofbirth != null) query.append("dateofbirth", String(args.dateofbirth))
if (bearerToken !== undefined) headers.set('authorization', `Bearer ${bearerToken}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v0/events/birth${query.size > 0 ? `?${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(v0Births, await res.json())
};