/*
Copyright 2016 The Rook Authors. All rights reserved.

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 status

import (
	"bytes"
	"fmt"
	"os"

	"github.com/rook/rook/cmd/rookctl/rook"
	"github.com/rook/rook/pkg/model"
	"github.com/rook/rook/pkg/rook/client"
	"github.com/rook/rook/pkg/util/display"
	"github.com/spf13/cobra"
)

var Cmd = &cobra.Command{
	Use:   "status",
	Short: "Outputs a summary of the status of the cluster",
}

func init() {
	Cmd.RunE = getStatusEntry
}

func getStatusEntry(cmd *cobra.Command, args []string) error {
	rook.SetupLogging()

	c := rook.NewRookNetworkRestClient()
	out, err := getStatus(c)
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}

	fmt.Print(out)
	return nil
}

func getStatus(c client.RookRestClient) (string, error) {
	statusDetails, err := c.GetStatusDetails()
	if err != nil {
		return "", fmt.Errorf("failed to get status: %+v", err)
	}

	var buffer bytes.Buffer
	w := rook.NewTableWriter(&buffer)

	// overall status
	buffer.WriteString(fmt.Sprintf("OVERALL STATUS: %s\n", model.HealthStatusToString(statusDetails.OverallStatus)))

	// summary messages
	if len(statusDetails.SummaryMessages) > 0 {
		buffer.WriteString("\n")
		buffer.WriteString("SUMMARY:\n")
		fmt.Fprintln(w, "SEVERITY\tNAME\tMESSAGE")
		for _, sm := range statusDetails.SummaryMessages {
			fmt.Fprintf(w, "%s\t%s\t%s\n", model.HealthStatusToString(sm.Status), sm.Name, sm.Message)
		}
		w.Flush()
	}

	// usage stats
	buffer.WriteString("\n")
	buffer.WriteString("USAGE:\n")
	fmt.Fprintln(w, "TOTAL\tUSED\tDATA\tAVAILABLE")
	fmt.Fprintf(w, "%s\t%s\t%s\t%s\n",
		display.BytesToString(statusDetails.Usage.TotalBytes),
		display.BytesToString(statusDetails.Usage.UsedBytes),
		display.BytesToString(statusDetails.Usage.DataBytes),
		display.BytesToString(statusDetails.Usage.AvailableBytes))
	w.Flush()

	// monitors
	buffer.WriteString("\n")
	buffer.WriteString("MONITORS:\n")
	fmt.Fprintln(w, "NAME\tADDRESS\tIN QUORUM\tSTATUS")
	for _, m := range statusDetails.Monitors {
		fmt.Fprintf(w, "%s\t%s\t%t\t%s\n", m.Name, m.Address, m.InQuorum, model.HealthStatusToString(m.Status))
	}
	w.Flush()

	// mgrs
	buffer.WriteString("\n")
	buffer.WriteString("MGRs:\n")
	fmt.Fprintln(w, "NAME\tSTATUS")
	if statusDetails.Mgrs.ActiveName != "" {
		fmt.Fprintf(w, "%s\t%s\n", statusDetails.Mgrs.ActiveName, "Active")
	}
	for _, name := range statusDetails.Mgrs.Standbys {
		fmt.Fprintf(w, "%s\t%s\n", name, "Standby")
	}
	w.Flush()

	// OSDs
	buffer.WriteString("\n")
	buffer.WriteString("OSDs:\n")
	fmt.Fprintln(w, "TOTAL\tUP\tIN\tFULL\tNEAR FULL")
	fmt.Fprintf(w, "%d\t%d\t%d\t%t\t%t\n", statusDetails.OSDs.Total, statusDetails.OSDs.NumberUp,
		statusDetails.OSDs.NumberIn, statusDetails.OSDs.Full, statusDetails.OSDs.NearFull)
	w.Flush()

	// placement groups
	buffer.WriteString("\n")
	buffer.WriteString(fmt.Sprintf("PLACEMENT GROUPS (%d total):\n", statusDetails.PGs.Total))
	fmt.Fprintln(w, "STATE\tCOUNT")
	for state, count := range statusDetails.PGs.StateCounts {
		fmt.Fprintf(w, "%s\t%d\n", state, count)
	}
	if statusDetails.PGs.Total == 0 {
		fmt.Fprintf(w, "none\n")
	}
	w.Flush()

	w.Flush()
	return buffer.String(), nil
}