import {z} from 'zod'

export type GetApiProjectsProjectZonesZoneAutoscalersAutoscalerArgs = {project: string, zone: string, autoscaler: string};

export type GetApiProjectsProjectZonesZoneAutoscalersAutoscalerOptions = {baseUrl?: string | undefined, Oauth2?: string | undefined, Oauth2c?: string | undefined, fetch?: typeof fetch | undefined};

export const autoscalingPolicyCpuUtilization = z.object({predictiveMethod: z.enum(["NONE", "OPTIMIZE_AVAILABILITY"]).optional(), utilizationTarget: z.number().optional()});

export const autoscalingPolicyCustomMetricUtilization = z.object({filter: z.string().optional(), metric: z.string().optional(), singleInstanceAssignment: z.number().optional(), utilizationTarget: z.number().optional(), utilizationTargetType: z.enum(["DELTA_PER_MINUTE", "DELTA_PER_SECOND", "GAUGE"]).optional()});

export const autoscalingPolicyLoadBalancingUtilization = z.object({utilizationTarget: z.number().optional()});

export const fixedOrPercent = z.object({calculated: z.number().int().optional(), fixed: z.number().int().optional(), percent: z.number().int().optional()});

export const autoscalingPolicyScaleInControl = z.object({maxScaledInReplicas: fixedOrPercent.optional(), timeWindowSec: z.number().int().optional()});

export const autoscalingPolicyScalingSchedule = z.object({description: z.string().optional(), disabled: z.boolean().optional(), durationSec: z.number().int().optional(), minRequiredReplicas: z.number().int().optional(), schedule: z.string().optional(), timeZone: z.string().optional()});

export const autoscalingPolicy = z.object({coolDownPeriodSec: z.number().int().optional(), cpuUtilization: autoscalingPolicyCpuUtilization.optional(), customMetricUtilizations: z.array(autoscalingPolicyCustomMetricUtilization).optional(), loadBalancingUtilization: autoscalingPolicyLoadBalancingUtilization.optional(), maxNumReplicas: z.number().int().optional(), minNumReplicas: z.number().int().optional(), mode: z.enum(["OFF", "ON", "ONLY_SCALE_OUT", "ONLY_UP"]).optional(), scaleInControl: autoscalingPolicyScaleInControl.optional(), scalingSchedules: z.record(z.string(), autoscalingPolicyScalingSchedule).optional(), stabilizationPeriodSec: z.number().int().optional()});

export const scalingScheduleStatus = z.object({lastStartTime: z.string().optional(), nextStartTime: z.string().optional(), state: z.enum(["ACTIVE", "DISABLED", "OBSOLETE", "READY"]).optional()});

export const autoscalerStatusDetails = z.object({message: z.string().optional(), type: z.enum(["ALL_INSTANCES_UNHEALTHY", "BACKEND_SERVICE_DOES_NOT_EXIST", "CAPPED_AT_MAX_NUM_REPLICAS", "CUSTOM_METRIC_DATA_POINTS_TOO_SPARSE", "CUSTOM_METRIC_INVALID", "MIN_EQUALS_MAX", "MISSING_CUSTOM_METRIC_DATA_POINTS", "MISSING_LOAD_BALANCING_DATA_POINTS", "MODE_OFF", "MODE_ONLY_SCALE_OUT", "MODE_ONLY_UP", "MORE_THAN_ONE_BACKEND_SERVICE", "NOT_ENOUGH_QUOTA_AVAILABLE", "REGION_RESOURCE_STOCKOUT", "SCALING_TARGET_DOES_NOT_EXIST", "SCHEDULED_INSTANCES_GREATER_THAN_AUTOSCALER_MAX", "SCHEDULED_INSTANCES_LESS_THAN_AUTOSCALER_MIN", "UNKNOWN", "UNSUPPORTED_MAX_RATE_LOAD_BALANCING_CONFIGURATION", "ZONE_RESOURCE_STOCKOUT"]).optional()});

export const autoscaler = z.object({autoscalingPolicy: autoscalingPolicy.optional(), creationTimestamp: z.string().optional(), description: z.string().optional(), id: z.string().optional(), kind: z.string().optional(), name: z.string().optional(), recommendedSize: z.number().int().optional(), region: z.string().optional(), scalingScheduleStatus: z.record(z.string(), scalingScheduleStatus).optional(), selfLink: z.string().optional(), status: z.enum(["ACTIVE", "DELETING", "ERROR", "PENDING"]).optional(), statusDetails: z.array(autoscalerStatusDetails).optional(), target: z.string().optional(), zone: z.string().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
};

/**
 * Returns the specified autoscaler resource.
 * 
 * GET /projects/{project}/zones/{zone}/autoscalers/{autoscaler}
 * 
 * Also accepts auth: Oauth2 + Oauth2c, Oauth2 + Oauth2c
 */
export const getApiProjectsProjectZonesZoneAutoscalersAutoscaler = async (args: GetApiProjectsProjectZonesZoneAutoscalersAutoscalerArgs, options?: GetApiProjectsProjectZonesZoneAutoscalersAutoscalerOptions) => {
const {baseUrl = "https://compute.googleapis.com/compute/v1", fetch: fetchFn = fetch, Oauth2, Oauth2c} = options ?? {}

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

if (Oauth2 !== undefined) headers.set('authorization', `Bearer ${Oauth2}`)
if (Oauth2c !== undefined) headers.set('authorization', `Bearer ${Oauth2c}`)

const url = `${baseUrl.replace(/\/+$/, '')}/projects/${encodeURIComponent(String(args.project))}/zones/${encodeURIComponent(String(args.zone))}/autoscalers/${encodeURIComponent(String(args.autoscaler))}${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(autoscaler, await res.json())
};