/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 service

import (
	"encoding/json"
	"fmt"
	"github.com/apache/skywalking-cli/commands"
	"github.com/apache/skywalking-cli/graphql/client"
	"github.com/apache/skywalking-cli/graphql/schema"
	"github.com/urfave/cli"
)

var ListCommand = cli.Command{
	Name:      "list",
	ShortName: "ls",
	Usage:     "List all available services",
	Flags: []cli.Flag{
		cli.StringFlag{
			Name:  "start",
			Usage: "Query start time",
		},
		cli.StringFlag{
			Name:  "end",
			Usage: "Query end time",
		},
		cli.GenericFlag{
			Name: "step",
			Value: &commands.StepEnumValue{
				Enum:     schema.AllStep,
				Default:  schema.StepMinute,
				Selected: schema.StepMinute,
			},
		},
	},
	Before: commands.BeforeChain([]cli.BeforeFunc{
		commands.SetUpDuration,
	}),
	Action: func(ctx *cli.Context) error {
		end := ctx.String("end")
		start := ctx.String("start")
		step := ctx.Generic("step")
		services := client.Services(schema.Duration{
			Start: start,
			End:   end,
			Step:  step.(*commands.StepEnumValue).Selected,
		})

		if bytes, e := json.Marshal(services); e != nil {
			return e
		} else {
			fmt.Printf("%v\n", string(bytes))
		}

		return nil
	},
}