// Copyright 2021 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.

package cli

import (
	apiv2client "github.com/pingcap/tiflow/pkg/api/v2"
	"github.com/pingcap/tiflow/pkg/cmd/context"
	"github.com/pingcap/tiflow/pkg/cmd/factory"
	"github.com/pingcap/tiflow/pkg/cmd/util"
	"github.com/spf13/cobra"
)

// pauseChangefeedOptions defines flags for the `cli changefeed pause` command.
type pauseChangefeedOptions struct {
	apiClient apiv2client.APIV2Interface

	changefeedID string
	namespace    string
}

// newPauseChangefeedOptions creates new options for the `cli changefeed pause` command.
func newPauseChangefeedOptions() *pauseChangefeedOptions {
	return &pauseChangefeedOptions{}
}

// addFlags receives a *cobra.Command reference and binds
// flags related to template printing to it.
func (o *pauseChangefeedOptions) addFlags(cmd *cobra.Command) {
	cmd.PersistentFlags().StringVarP(&o.namespace, "namespace", "n", "default", "Replication task (changefeed) Namespace")
	cmd.PersistentFlags().StringVarP(&o.changefeedID, "changefeed-id", "c", "", "Replication task (changefeed) ID")
	_ = cmd.MarkPersistentFlagRequired("changefeed-id")
}

// complete adapts from the command line args to the data and client required.
func (o *pauseChangefeedOptions) complete(f factory.Factory) error {
	apiClient, err := f.APIV2Client()
	if err != nil {
		return err
	}

	o.apiClient = apiClient
	return nil
}

// run the `cli changefeed pause` command.
func (o *pauseChangefeedOptions) run() error {
	ctx := context.GetDefaultContext()
	return o.apiClient.Changefeeds().Pause(ctx, o.namespace, o.changefeedID)
}

// newCmdPauseChangefeed creates the `cli changefeed pause` command.
func newCmdPauseChangefeed(f factory.Factory) *cobra.Command {
	o := newPauseChangefeedOptions()

	command := &cobra.Command{
		Use:   "pause",
		Short: "Pause a replication task (changefeed)",
		Args:  cobra.NoArgs,
		Run: func(cmd *cobra.Command, args []string) {
			util.CheckErr(o.complete(f))
			util.CheckErr(o.run())
		},
	}

	o.addFlags(command)

	return command
}