#!/bin/bash

if [ "$1" != "" ]; then
    cmd[0]="$AWS ec2 describe-network-interfaces --network-interface-ids $1"
else
    cmd[0]="$AWS ec2 describe-network-interfaces"
fi

pref[0]="NetworkInterfaces"
tft[0]="aws_network_interface_attachment"

cloud9s=`aws ec2 describe-instances --filters "Name=tag-key,Values=aws:cloud9*" | jq .Reservations[].Instances[].InstanceId`
asis=`aws ec2 describe-instances --filters "Name=tag-key,Values=aws:autoscaling*" | jq .Reservations[].Instances[].InstanceId`


for c in `seq 0 0`; do
    
    cm=${cmd[$c]}
	ttft=${tft[(${c})]}
	#echo $cm
    awsout=`eval $cm 2> /dev/null`
    if [ "$awsout" == "" ];then
        echo "$cm : You don't have access for this resource"
        exit
    fi
    count=`echo $awsout | jq ".${pref[(${c})]} | length"`
    if [ "$count" -gt "0" ]; then
        count=`expr $count - 1`
        for i in `seq 0 $count`; do
            #echo $i
            cname=`echo $awsout | jq ".${pref[(${c})]}[(${i})].NetworkInterfaceId" | tr -d '"'`
            echo "$ttft $cname"
            for ci in `echo $cloud9s`;do
                c9=`echo $ci | tr -d '"'`
                if [ "$c9" == "$cname" ]; then
                    echo "Instance is cloud9 skipping ....."
                    skipit=1
                fi
            done
            for ci in `echo $asis`;do
                c9=`echo $ci | tr -d '"'`
                if [ "$c9" == "$cname" ]; then
                    echo "Instance is Autoscaling skipping ....."
                    skipit=1
                fi
            done
            if [[ $skipit -eq 1 ]];then
                echo "breaking ..."
                continue 
            fi

            

            fn=`printf "%s__%s.tf" $ttft $cname`
            devind=`echo $awsout | jq ".${pref[(${c})]}[(${i})].Attachment.DeviceIndex" | tr -d '"'`
            insid=`echo $awsout | jq ".${pref[(${c})]}[(${i})].Attachment.InstanceId" | tr -d '"'`
            if [ "$insid" != "null" ]; then
                printf "resource \"aws_network_interface_attachment\" \"%s\" {\n" $cname > $fn
                printf "instance_id = aws_instance.%s.id\n" $insid >> $fn
                printf "network_interface_id = aws_network_interface.%s.id\n" $cname >> $fn
                printf "device_index = %s\n" $devind >> $fn
                printf "}\n" $cname >> $fn
            fi
            
        done
    fi
done
#terraform fmt > /dev/null
#terraform validate
rm -f t*.txt