// Copyright (c) 2023 Gitpod GmbH. All rights reserved.
// Licensed under the GNU Affero General Public License (AGPL).
// See License.AGPL.txt in the project root for license information.

package cmd

import (
	"context"
	"log/slog"
	"time"

	"github.com/bufbuild/connect-go"
	v1 "github.com/gitpod-io/gitpod/components/public-api/go/experimental/v1"
	"github.com/gitpod-io/local-app/pkg/prettyprint"
	"github.com/spf13/cobra"
)

var stopDontWait = false

// workspaceStopCommand stops to a given workspace
var workspaceStopCommand = &cobra.Command{
	Use:   "stop <workspace-id>",
	Short: "Stop a given workspace",
	Args:  cobra.ExactArgs(1),
	RunE: func(cmd *cobra.Command, args []string) error {
		cmd.SilenceUsage = true
		workspaceID := args[0]

		ctx, cancel := context.WithTimeout(cmd.Context(), 5*time.Minute)
		defer cancel()

		gitpod, err := getGitpodClient(ctx)
		if err != nil {
			return err
		}

		slog.Debug("stopping workspace...")
		wsInfo, err := gitpod.Workspaces.StopWorkspace(ctx, connect.NewRequest(&v1.StopWorkspaceRequest{WorkspaceId: workspaceID}))
		if err != nil {
			return err
		}

		wsPhase := wsInfo.Msg.GetResult().Status.Instance.Status.Phase
		switch wsPhase {
		case v1.WorkspaceInstanceStatus_PHASE_STOPPED:
			slog.Info("workspace is already stopped")
			return nil
		case v1.WorkspaceInstanceStatus_PHASE_STOPPING:
			slog.Info("workspace is already stopping")
			return nil
		}

		if stopDontWait {
			slog.Info("workspace stopping")
			return nil
		}

		stream, err := gitpod.Workspaces.StreamWorkspaceStatus(ctx, connect.NewRequest(&v1.StreamWorkspaceStatusRequest{WorkspaceId: workspaceID}))
		if err != nil {
			return err
		}

		// See EXP-909
		// defer stream.Close()

		slog.Info("waiting for workspace to stop...")

		previousStatus := ""
		for stream.Receive() {
			msg := stream.Msg()
			if msg == nil {
				slog.Debug("no message received")
				continue
			}

			wsPhase = msg.GetResult().Instance.Status.Phase
			switch wsPhase {
			case v1.WorkspaceInstanceStatus_PHASE_STOPPED:
				{
					slog.Info("workspace stopped")
					return nil
				}
			case v1.WorkspaceInstanceStatus_PHASE_RUNNING:
				// Skip reporting the "running" status as it is often the initial state and seems confusing to the user.
				// There is some delay between requesting a workspace to stop and it actually stopping, so we don't want
				// to report "running" in the meantime.
				break
			default:
				{
					currentStatus := prettyprint.FormatWorkspacePhase(wsPhase)
					if currentStatus != previousStatus {
						slog.Info("workspace status: " + currentStatus)
						previousStatus = currentStatus
					}
				}
			}
		}

		if err := stream.Err(); err != nil {
			return err
		}

		return nil
	},
}

func init() {
	workspaceCmd.AddCommand(workspaceStopCommand)
	workspaceStopCommand.Flags().BoolVarP(&stopDontWait, "dont-wait", "d", false, "do not wait for workspace to fully stop, only initialize")
}