#!/usr/bin/env bash
# Copyright 2019 Ciena Corporation
#
# 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,
# 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.

# trap ctrl-c and call ctrl_c()
trap ctrl_c INT

function ctrl_c() {
    tput cnorm
    echo ""
    echo "ctrl-c trapped"
    echo "Thank you for trying 'votlha up'"
    exit
}

VOLTCTL_VERSION=${VOLTCTL_VERSION:-0.0.5-dev}
KIND_VERSION=${KIND_VERSION:-v0.4.0}
_VOLTCTL_VERSION=$(echo $VOLTCTL_VERSION | sed -e 's/-/_/g')

TYPE=${TYPE:-minimal}
# Only minimal cluster works in this script currently
TYPE=minimal

if [ $# -ne 1 -o $(echo ":up:down:" | grep -c ":$1:") -ne 1 ]; then 
    >&2 echo "up or down?"
    exit 1
fi

if [ "$1" == "down" ]; then
    if [ -x ./bin/kind ]; then
        exec ./bin/kind delete cluster --name voltha-$TYPE
    else
       >&2 echo "Kind doesn't seem to be installed, so nothing to do. Bye."
    fi
    exit 
fi

LOG="install.log"
date > $LOG

spin() {
    PARTS="\
        \xe2\xa2\x8e\xe2\xa1\xb0 \
        \xe2\xa2\x8e\xe2\xa1\xa1 \
        \xe2\xa2\x8e\xe2\xa1\x91 \
        \xe2\xa2\x8e\xe2\xa0\xb1 \
        \xe2\xa0\x8e\xe2\xa1\xb1 \
        \xe2\xa2\x8a\xe2\xa1\xb1 \
        \xe2\xa2\x8c\xe2\xa1\xb1 \
        \xe2\xa2\x86\xe2\xa1\xb1 \
        "
    IDX=1
    tput civis
    while true; do
       C=$(echo $PARTS | cut '-d ' -f $IDX)
       echo -en "$C"
       IDX=$(expr $IDX + 1)
       if [ $IDX -gt 8 ]; then
           IDX=1
       fi
       sleep .15 
       echo -en "\r"
    done
}

SPIN_PARTS="\
        \xe2\xa2\x8e\xe2\xa1\xb0 \
        \xe2\xa2\x8e\xe2\xa1\xa1 \
        \xe2\xa2\x8e\xe2\xa1\x91 \
        \xe2\xa2\x8e\xe2\xa0\xb1 \
        \xe2\xa0\x8e\xe2\xa1\xb1 \
        \xe2\xa2\x8a\xe2\xa1\xb1 \
        \xe2\xa2\x8c\xe2\xa1\xb1 \
        \xe2\xa2\x86\xe2\xa1\xb1 \
        "
IDX=1
NOT_VERIFIED="\xe2\x9c\x97\x20"
VERIFIED="\xe2\x9c\x93\x20"
bspin() {
    tput civis
    IDX=1
    local INDENT=
    if [ "$1" == "-" ]; then
        INDENT="  "
        shift
    fi
    echo -en "$INDENT   $*"
}

sspin() {
    local INDENT=
    if [ "$1" == "-" ]; then
        INDENT="  "
        shift
    fi
    C=$(echo $SPIN_PARTS | cut '-d ' -f $IDX)
    echo -en "\r$INDENT$C $*"
    IDX=$(expr $IDX + 1)
    if [ $IDX -gt 8 ]; then
        IDX=1
    fi
}

espin() {
    local INDENT=
    if [ "$1" == "-" ]; then
        INDENT="  "
        shift
    fi
    echo -e "\r$INDENT$*"
    tput cnorm
}

count_pods() {
    local NAMESPACE=$1; shift
    local PODS=$(kubectl -n $NAMESPACE get pod -o go-template="{{range .items}}{{.metadata.name}}/{{.status.phase}}/_{{range .status.containerStatuses}}{{.ready}}_{{end}} {{end}}")
    local COUNT=0
    local PATTERNS=$*
    for POD in $PODS; do
        local NAME=$(echo $POD | cut -d/ -f 1)
        local STATE=$(echo $POD | cut -d/ -f 2)
        local CONTAINERS=$(echo $POD | cut -d/ -f 3 | sed -e 's/_/ /g')
        if [ "$STATE" == "Running" ]; then
            local TOTAL=$(echo $CONTAINERS | wc -w)
            local FOUND=$(echo $CONTAINERS | grep -o true | wc -l)
            if [ $TOTAL -eq $FOUND ]; then
                for PATTERN in $PATTERNS; do
                    if [[ $NAME =~ $PATTERN ]]; then
                        COUNT=$(expr $COUNT + 1)
                    fi
                done
            fi
        fi
    done
    echo $COUNT
}

wait_for_pods() {
    local INDENT=
    if [ "$1" == "-" ]; then
        INDENT=$1; shift
    fi
    local NAMESPACE=$1; shift
    local EXPECT=$1; shift
    local RETRY=$1; shift
    local MESSAGE=$1; shift
    local PATTERNS=$*
    local HAVE=$(count_pods $NAMESPACE $PATTERNS)
    COUNT=$(expr 300 / 15)
    bspin $INDENT $MESSAGE
    sspin $INDENT
    if [ $HAVE -ne $EXPECT ]; then
        while [ $HAVE -ne $EXPECT ]; do
            sspin $INDENT
            COUNT=$(expr $COUNT - 1)
            if [ $COUNT -eq 0 ]; then
                HAVE=$(count_pods $NAMESPACE $PATTERNS)
                COUNT=$(expr 300 / 15)
            fi
            sleep .15
        done
    fi
    espin $INDENT $VERIFIED
    if [ $HAVE -ne $EXPECT ]; then
        return 1
    fi
    return 0
}

helm_install() { 
    local INDENT=
    if [ "$1" == "-" ]; then
        INDENT=$1; shift
    fi
    local NAMESPACE=$1; shift
    local NAME=$1; shift
    local CHART=$1; shift
    local MESSAGE=$*

    COUNT=$(expr 300 / 15)
    bspin $INDENT $MESSAGE
    (set -x; helm install -f $TYPE-values.yaml --namespace $NAMESPACE --name $NAME $CHART >>$LOG 2>&1) >>$LOG 2>&1
    SUCCESS=$?
    while [ $SUCCESS -ne 0 ]; do
        sspin $INDENT
        COUNT=$(expr $COUNT - 1)
        if [ $COUNT -eq 0 ]; then
            (set -x; helm install -f $TYPE-values.yaml --namespace $NAMESPACE --name $NAME $CHART >>$LOG 2>&1) >>$LOG 2>&1
            COUNT=$(expr 300 / 15)
        fi
        sleep .15
    done
    espin $INDENT $VERIFIED
}

echo "INSTALL TYPE: $TYPE" >> $LOG

bspin "Verify GOPATH"
export GOPATH=$(pwd)
mkdir -p $GOPATH/bin
espin $VERIFIED

bspin "Verify Kubernetes/Kind"
if [ -x $GOPATH/bin/kind ]; then
    espin $VERIFIED
else
    espin $NOT_VERIFIED
    bspin - "Download and build Kubernetes/Kind"
    (set -x; curl -o $GOPATH/bin/kind -sSL https://github.com/kubernetes-sigs/kind/releases/download/$KIND_VERSION/kind-$(go env GOHOSTOS)-$(go env GOARCH) >>$LOG 2>&1) >>$LOG 2>&1
    (set -x; chmod 755 $GOPATH/bin/kind >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED
fi

bspin "Verify Helm"
if [ -x $GOPATH/bin/helm ]; then
    espin $VERIFIED
else
    espin $NOT_VERIFIED
    bspin - "Download and install Helm"
    (set -x; curl -sSL https://git.io/get_helm.sh | USE_SUDO=false HELM_INSTALL_DIR=$(go env GOPATH)/bin bash >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED
fi

bspin "Verify voltctl"
if [ -x $GOPATH/bin/voltctl ]; then
    espin $VERIFIED
else
    espin $NOT_VERIFIED
    bspin - "Download and build voltctl"
    (set -x; curl -o $GOPATH/bin/voltctl -sSL https://github.com/ciena/voltctl/releases/download/$VOLTCTL_VERSION/voltctl-$_VOLTCTL_VERSION-$(go env GOHOSTOS)-$(go env GOARCH) >>$LOG 2>&1) >>$LOG 2>&1
    (set -x; chmod 755 $GOPATH/bin/voltctl >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED
fi

bspin "Verify command PATH"
export PATH=$(go env GOPATH)/bin:$PATH
espin $VERIFIED

HAVE=$(kind get clusters | grep -c voltha-$TYPE)
bspin "Verify Kubernetes/Kind Cluster"
sspin
if [ $HAVE -eq 0 ]; then
  espin $NOT_VERIFIED
  kind create cluster --name voltha-$TYPE --config $TYPE-cluster.cfg
else
  espin $VERIFIED
fi

export KUBECONFIG="$(kind get kubeconfig-path --name="voltha-$TYPE")"
P="coredns-.* \
    etcd-voltha-$TYPE-control-plane \
    kindnet-.* \
    kube-apiserver-voltha-$TYPE-control-plane \
    kube-controller-manager-voltha-$TYPE-control-plane \
    kube-proxy-.* \
    kube-scheduler-voltha-$TYPE-control-plane"

wait_for_pods - "kube-system" 12 -1 "Waiting for system PODs to start..." $P

COUNT=$(count_pods "kube-system" "tiller-deploy-.*")
bspin "Verify Helm"
if [ $(count_pods "kube-system" "tiller-deploy-.*") -ne 1 ]; then
    espin $NOT_VERIFIED
    echo "Configuring Helm ..."
    bspin - "Initialize Helm"
    (set -x; helm init --upgrade >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED
    bspin - "Add Google Incubator repository to Helm ..."
    (set -x; helm repo add incubator https://kubernetes-charts-incubator.storage.googleapis.com >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED

    bspin - "Add Google Stable repository to Helm ..."
    (set -x; helm repo add stable https://kubernetes-charts.storage.googleapis.com >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED
    bspin - "Add ONF repository to Helm ..."
    (set -x; helm repo add onf https://charts.opencord.org >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED
    bspin - "Update Helm repository cache ..."
    (set -x; helm repo update >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED
    
    # Create and k8s service account so that Helm can create pods
    bspin - "Create Tiller ServiceAccount ..."
    (set -x; kubectl create serviceaccount --namespace kube-system tiller >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED
    bspin - "Create Tiller ClusterRoleBinding ..."
    (set -x; kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED
    bspin - "Update Tiller Manifest ..."
    (set -x; kubectl patch deploy --namespace kube-system tiller-deploy -p '{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}' >>$LOG 2>&1) >>$LOG 2>&1
    espin - $VERIFIED
else
    espin $VERIFIED
fi
wait_for_pods - "kube-system" 1 -1 "Waiting for Tiller POD to start..." "tiller-deploy-.*"

bspin "Verify ETCD Operator"
if [ $(helm list etcd-operator | grep -c DEPLOYED) -ne 1 ]; then
    espin $NOT_VERIFIED 
    helm_install - voltha etcd-operator stable/etcd-operator "Install ETCD Operator"
else
    espin $VERIFIED
fi
wait_for_pods - "voltha" 1 -1 "Waiting for ETCD Operator to start..." "etcd-operator-.*"

bspin "Verify ONOS installed"
if [ $(helm list onos | grep -c DEPLOYED) -ne 1 ]; then
    espin $NOT_VERIFIED
    helm_install - default onos onf/onos "Install ONOS"
else
    espin $VERIFIED
fi
wait_for_pods - "default" 1 -1 "Waiting for ONOS to start..." "onos-.*"

bspin - "Forward ONOS API port"
(set -x; screen -p 0 -X -S onos-ui  stuff $'\003' >>$LOG 2>&1) >>$LOG 2>&1
(set -x; screen -dmS onos-ui kubectl port-forward service/onos-ui 8181:8181 >>$LOG 2>&1) >>$LOG 2>&1
espin - $VERIFIED
bspin - "Forward ONOS SSH port"
(set -x; screen -p 0 -X -S onos-ssh  stuff $'\003' >>$LOG 2>&1) >>$LOG 2>&1
(set -x; screen -dmS onos-ssh kubectl port-forward service/onos-ssh 8101:8101 >>$LOG 2>&1) >>$LOG 2>&1
espin - $VERIFIED
bspin - "Install required ONOS applications"
(set -x; ./onos-files/install-onos-applications.sh >>$LOG 2>&1) >>$LOG 2>&1
espin - $VERIFIED

bspin "Verify VOLTHA installed"
if [ $(helm list voltha | grep -c DEPLOYED) -ne 1 ]; then
    espin $NOT_VERIFIED
    helm_install - voltha voltha onf/voltha "Install VOLTHA Core"
else
    espin $VERIFIED
fi
VOLTHA="ofagent-.* \
    ro-core.* \
    rw-core.* \
    voltha-api-server-.* \
    voltha-cli-server-.* \
    voltha-etcd-cluster-.* \
    voltha-kafka-.* \
    voltha-zookeeper-.*"
wait_for_pods - "voltha" 9 -1 "Waiting for VOLTHA Core to start..." $VOLTHA

echo "Verify Adapters"
bspin - "Verify Simulated Adapters installed"
if [ $(helm list sim | grep -c DEPLOYED) -ne 1 ]; then
    espin - $NOT_VERIFIED
    helm_install - voltha sim onf/voltha-adapter-simulated "Install Simulated Adapters"
else
    espin - $VERIFIED
fi

bspin - "Verify OpenOLT Adapter installed"
if [ $(helm list open-olt | grep -c DEPLOYED) -ne 1 ]; then
    espin - $NOT_VERIFIED
    helm_install - voltha open-olt onf/voltha-adapter-openolt "Install OpenOLT Adapter"
else
    espin - $VERIFIED
fi
bspin - "Verify OpenONU Adapter installed"
if [ $(helm list open-onu | grep -c DEPLOYED) -ne 1 ]; then
    espin - $NOT_VERIFIED
    helm_install - voltha open-onu onf/voltha-adapter-openonu "Install OpenONU Adapter"
else
    espin - $VERIFIED
fi

ADAPTERS="adapter-.*"
wait_for_pods - "voltha" 4 -1 "Waiting for adapters to start..." $ADAPTERS

echo "Restart VOLTHA API"
API="voltha-api-server-.* ofagent-.*"
(set -x; kubectl scale --replicas=0 deployment -n voltha voltha-api-server ofagent >>$LOG 2>&1) >>$LOG 2>&1
wait_for_pods - "voltha" 0 -1 "Wait for API to stop" $API
(set -x; kubectl scale --replicas=1 deployment -n voltha voltha-api-server ofagent >>$LOG 2>&1) >>$LOG 2>&1
wait_for_pods - "voltha" 2 -1 "Wait for API to re-start ..." $API

bspin - "Forward VOLTHA API port"
(set -x; screen -p 0 -X -S voltha-api  stuff $'\003' >>$LOG 2>&1) >>$LOG 2>&1
(set -x; screen -dmS voltha-api kubectl port-forward -n voltha service/voltha-api 55555:55555 >>$LOG 2>&1) >>$LOG 2>&1
espin - $VERIFIED
bspin - "Forward VOLTHA SSH port"
(set -x; screen -p 0 -X -S voltha-ssh  stuff $'\003' 2>/dev/null >/dev/null >>$LOG 2>&1) >>$LOG 2>&1
(set -x; screen -dmS voltha-ssh kubectl port-forward -n voltha service/voltha-cli 5022:5022 >>$LOG 2>&1) >>$LOG 2>&1
espin - $VERIFIED

bspin - "Create voltctl configuration file"
(set -x; mkdir -p $HOME/.volt >>$LOG 2>&1) >>$LOG 2>&1
(set -x; voltctl -a v2 -s localhost:55555 config > $HOME/.volt/config 2>>$LOG) >>$LOG 2>&1
espin - $VERIFIED

echo "Please issue the following commands in your terminal to ensure that you" | tee -a $LOG
echo "are accessing the correct Kubernetes/Kind cluster as well as have the  " | tee -a $LOG
echo "tools required by VOLTHA in your command path.                         " | tee -a $LOG
echo "" | tee -a $LOG
echo "export KUBECONFIG=\"\$(./bin/kind get kubeconfig-path --name=\"voltha-$TYPE\")\"" | tee -a $LOG
echo 'export PATH=$GOPATH/bin:$PATH' | tee -a $LOG
echo "" | tee -a $LOG
echo "Thank you for choosing kind-voltha for you quick cluster needs." | tee -a $LOG