import {z} from 'zod'

export type GetApiV2InfraEnvsInfraEnvIdHostsHostIdInstructionsArgs = {infra_env_id: string, host_id: string, timestamp?: number | undefined, discovery_agent_version?: string | undefined};

export type GetApiV2InfraEnvsInfraEnvIdHostsHostIdInstructionsOptions = {baseUrl?: string | undefined, agentAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const stepType = z.enum(["connectivity-check", "execute", "inventory", "install", "free-network-addresses", "dhcp-lease-allocate", "api-vip-connectivity-check", "tang-connectivity-check", "ntp-synchronizer", "installation-disk-speed-check", "container-image-availability", "domain-resolution", "stop-installation", "logs-gather", "next-step-runner", "upgrade-agent", "download-boot-artifacts", "reboot-for-reclaim", "verify-vips"]);

export const step = z.object({step_type: stepType.optional(), step_id: z.string().optional(), args: z.array(z.string()).optional()});

export const steps = z.object({next_instruction_seconds: z.number().int().optional(), post_step_action: z.enum(["exit", "continue"]).optional(), instructions: z.array(step).optional()});

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 the next operations that the host agent needs to perform.
 * 
 * GET /v2/infra-envs/{infra_env_id}/hosts/{host_id}/instructions
 */
export const getApiV2InfraEnvsInfraEnvIdHostsHostIdInstructions = async (args: GetApiV2InfraEnvsInfraEnvIdHostsHostIdInstructionsArgs, options?: GetApiV2InfraEnvsInfraEnvIdHostsHostIdInstructionsOptions) => {
const {baseUrl = "http://api.openshift.com/api/assisted-install", fetch: fetchFn = fetch, agentAuth} = options ?? {}

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

if (args.timestamp != null) query.append("timestamp", String(args.timestamp))
if (args.discovery_agent_version != null) headers.set("discovery_agent_version", String(args.discovery_agent_version))
if (agentAuth !== undefined) headers.set("X-Secret-Key", agentAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/infra-envs/${encodeURIComponent(String(args.infra_env_id))}/hosts/${encodeURIComponent(String(args.host_id))}/instructions${query.size > 0 ? `?${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(steps, await res.json())
};