/*
Copyright 2017 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package api

import (
	"bytes"
	"fmt"
)

// GetConditionByType gets condition by type.
func GetConditionByType(conditionType ClusterAutoscalerConditionType,
	conditions []ClusterAutoscalerCondition) *ClusterAutoscalerCondition {
	for i := range conditions {
		if conditions[i].Type == conditionType {
			return &conditions[i]
		}
	}
	return nil
}

func getConditionsString(autoscalerConditions []ClusterAutoscalerCondition, prefix string) string {
	health := fmt.Sprintf("%v%-12v <unknown>", prefix, ClusterAutoscalerHealth+":")
	var scaleUp, scaleDown string
	var buffer, other bytes.Buffer
	for _, condition := range autoscalerConditions {
		var line bytes.Buffer
		line.WriteString(fmt.Sprintf("%v%-12v %v",
			prefix,
			condition.Type+":",
			condition.Status))
		if condition.Message != "" {
			line.WriteString(" (")
			line.WriteString(condition.Message)
			line.WriteString(")")
		}
		line.WriteString("\n")
		line.WriteString(fmt.Sprintf("%v%13sLastProbeTime:      %v\n",
			prefix,
			"",
			condition.LastProbeTime))
		line.WriteString(fmt.Sprintf("%v%13sLastTransitionTime: %v\n",
			prefix,
			"",
			condition.LastTransitionTime))
		switch condition.Type {
		case ClusterAutoscalerHealth:
			health = line.String()
		case ClusterAutoscalerScaleUp:
			scaleUp = line.String()
		case ClusterAutoscalerScaleDown:
			scaleDown = line.String()
		default:
			other.WriteString(line.String())
		}
	}
	buffer.WriteString(health)
	buffer.WriteString(scaleUp)
	buffer.WriteString(scaleDown)
	buffer.WriteString(other.String())
	return buffer.String()
}

// GetReadableString produces human-readable description of status.
func (status ClusterAutoscalerStatus) GetReadableString() string {
	var buffer bytes.Buffer
	buffer.WriteString("Cluster-wide:\n")
	buffer.WriteString(getConditionsString(status.ClusterwideConditions, "  "))
	if len(status.NodeGroupStatuses) == 0 {
		return buffer.String()
	}
	buffer.WriteString("\nNodeGroups:\n")
	for _, nodeGroupStatus := range status.NodeGroupStatuses {
		buffer.WriteString(fmt.Sprintf("  Name:        %v\n", nodeGroupStatus.ProviderID))
		buffer.WriteString(getConditionsString(nodeGroupStatus.Conditions, "  "))
		buffer.WriteString("\n")
	}
	return buffer.String()
}