import {z} from 'zod'

export type GetApiSettingsOptions = {baseUrl?: string | undefined, APITokens?: string | undefined, fetch?: typeof fetch | undefined};

export const settings = z.object({allowed_networks: z.array(z.object({id: z.string().optional(), allowed_networks: z.array(z.string()).optional()})).optional(), global_policy_mode: z.enum(["enforce", "audit"]).optional(), global_policy_mode_overridable: z.boolean().optional(), run_frequency: z.number().int().optional(), first_run_hour: z.number().int().optional(), first_run_minute: z.number().int().optional(), splay_time: z.number().int().optional(), modified_file_ttl: z.number().int().optional(), output_file_ttl: z.number().int().optional(), require_time_synchronization: z.boolean().optional(), relay_server_synchronization_method: z.enum(["classic", "rsync", "disabled"]).optional(), relay_server_synchronize_policies: z.boolean().optional(), relay_server_synchronize_shared_files: z.boolean().optional(), rudder_report_protocol_default: z.enum(["HTTPS", "SYSLOG"]).optional(), reporting_mode: z.enum(["full-compliance", "changes-only", "reports-disabled"]).optional(), heartbeat_frequency: z.number().int().optional(), enable_change_message: z.boolean().optional(), mandatory_change_message: z.boolean().optional(), change_message_prompt: z.string().optional(), enable_change_request: z.boolean().optional(), enable_self_validation: z.boolean().optional(), enable_self_deployment: z.boolean().optional(), display_recent_changes_graphs: z.boolean().optional(), enable_javascript_directives: z.string().optional(), send_metrics: z.string().optional(), node_accept_duplicated_hostname: z.boolean().optional(), node_onaccept_default_state: z.enum(["enabled", "ignored", "empty-policies", "initializing", "preparing-eol"]).optional(), node_onaccept_default_policyMode: z.enum(["default", "enforce", "audit"]).optional(), unexpected_unbound_var_values: z.boolean().optional(), rudder_compute_changes: z.boolean().optional(), rudder_generation_compute_dyngroups: z.boolean().optional(), rudder_compute_dyngroups_max_parallelism: z.string().optional(), rudder_generation_max_parallelism: z.string().optional(), rudder_generation_js_timeout: z.number().int().optional(), rudder_generation_continue_on_error: z.boolean().optional(), rudder_generation_delay: z.string().optional(), rudder_generation_policy: z.string().optional()});

export const getApiSettingsResponse = z.object({result: z.enum(["success", "error"]), action: z.literal("getAllSettings"), data: z.object({settings: settings})});

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
};

/**
 * List all settings
 * 
 * GET /settings
 */
export const getApiSettings = async (options?: GetApiSettingsOptions) => {
const {baseUrl = "https://rudder.example.com/rudder/api/latest", fetch: fetchFn = fetch, APITokens} = options ?? {}

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

if (APITokens !== undefined) headers.set("X-API-Token", APITokens)

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