import {z} from 'zod'

export type GetApiFailoverGroupsArgs = {offset?: number | undefined, limit?: number | undefined, filter?: string | undefined};

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

export const failoverServiceAPIHalLink = z.object({href: z.union([z.string(), z.string()]), templated: z.boolean().optional(), type: z.string().optional(), deprecation: z.string().optional(), name: z.string().optional(), profile: z.string().optional(), title: z.string().optional(), hreflang: z.string().optional()});

export const failoverServiceAPIFailoverPair = z.object({service_name: z.string(), primary_id: z.string(), failover_id: z.string()});

export const getApiFailoverGroupsResponse = z.object({_links: z.object({self: failoverServiceAPIHalLink, prev: failoverServiceAPIHalLink.optional(), next: failoverServiceAPIHalLink.optional(), offset: z.object({href: z.union([z.string(), z.string()]), templated: z.literal(true), type: z.string().optional(), deprecation: z.string().optional(), name: z.string().optional(), profile: z.string().optional(), title: z.string().optional(), hreflang: z.string().optional()}).optional(), limit: z.object({href: z.union([z.string(), z.string()]), templated: z.literal(true), type: z.string().optional(), deprecation: z.string().optional(), name: z.string().optional(), profile: z.string().optional(), title: z.string().optional(), hreflang: z.string().optional()}).optional(), filter: z.object({href: z.union([z.string(), z.string()]), templated: z.literal(true), type: z.string().optional(), deprecation: z.string().optional(), name: z.string().optional(), profile: z.string().optional(), title: z.string().optional(), hreflang: z.string().optional()}).optional()}).and(z.record(z.string(), failoverServiceAPIHalLink)), _embedded: z.object({items: z.array(z.object({id: z.string(), name: z.string(), status: z.enum(["creating", "normal", "failed-over", "failing-over", "error", "deleting", "deleted"]), pairs: z.array(failoverServiceAPIFailoverPair), _links: z.object({self: failoverServiceAPIHalLink}).and(z.record(z.string(), failoverServiceAPIHalLink)), _embedded: z.record(z.string(), z.unknown()).optional()}))}).and(z.record(z.string(), z.unknown())), count: z.number().int(), total: z.number().int(), pagination: z.object({total: z.number().int(), limit: z.number().int(), offset: z.number().int()})});

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
};

/**
 * Retrieves a collection of failover groups.
 * 
 * GET /failover-groups
 */
export const getApiFailoverGroups = async (args: GetApiFailoverGroupsArgs, options: GetApiFailoverGroupsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, FailoverServiceAPIBearerAuth} = options ?? {}

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

if (args.offset != null) query.append("offset", String(args.offset))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.filter != null) query.append("filter", String(args.filter))
if (FailoverServiceAPIBearerAuth !== undefined) headers.set('authorization', `Bearer ${FailoverServiceAPIBearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/failover-groups${query.size > 0 ? `?${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(getApiFailoverGroupsResponse, await res.json())
};