package main

import (
	"fmt"
	"net/url"
	"os"
	"strings"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/credentials"
	"github.com/aws/aws-sdk-go/service/ec2"
)

func main() {
	if len(os.Args) == 1 {
		fmt.Println("usage: ec2 [profile]")
		return
	}
	profile := os.Args[1]
	svc := ec2.New(&aws.Config{
		Credentials: credentials.NewSharedCredentials("", profile),
		Region:      "ap-northeast-1",
	})
	resp, err := svc.DescribeInstances(&ec2.DescribeInstancesInput{
		Filters: []*ec2.Filter{&ec2.Filter{
			Name: aws.String("instance-state-name"),
			Values: []*string{
				aws.String("running"),
			},
		}},
	})
	if err != nil {
		panic(err)
	}
	for _, res := range resp.Reservations {
		for _, inst := range res.Instances {
			if inst.PublicIPAddress == nil {
				continue
			}
			name := "None"
			for _, keys := range inst.Tags {
				if *keys.Key == "Name" {
					name = url.QueryEscape(*keys.Value)
					break
				}
			}
			line := strings.Join([]string{
				*inst.PublicIPAddress,
				*inst.PrivateIPAddress,
				name,
				*inst.KeyName,
			}, "\t")
			fmt.Println(line)
		}
	}
}