#!/bin/bash
# SPDX-license-identifier: Apache-2.0
##############################################################################
# Copyright (c)
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################

# Clean up
clean_up() {
    if sudo virsh list --all | grep " ${VM_NAME} .*running" ; then
        sudo virsh destroy "$VM_NAME"
    fi
    if sudo virsh list --all | grep " ${VM_NAME} " ; then
        sudo virsh undefine "$VM_NAME"
    fi
    sudo rm -rf "/var/lib/libvirt/images/$VM_NAME"
    sleep 5
}


check_prerequisites() {
    echo "Info  : Check prerequisites"

    #-------------------------------------------------------------------------------
    # We shouldn't be running as root
    #-------------------------------------------------------------------------------
    if [[ "$(whoami)" == "root" ]]; then
        echo "ERROR : This script must not be run as root!"
        echo "        Please switch to a regular user before running the script."
        exit 1
    fi

    #-------------------------------------------------------------------------------
    # Check for passwordless sudo
    #-------------------------------------------------------------------------------
    if ! sudo -n "true"; then
        echo "ERROR : passwordless sudo is needed for '$(id -nu)' user."
        exit 1
    fi

    #-------------------------------------------------------------------------------
    # Check if SSH key exists
    #-------------------------------------------------------------------------------
    if [[ ! -f "$HOME/.ssh/id_rsa" ]]; then
        echo "ERROR : You must have SSH keypair in order to run this script!"
        exit 1
    fi

    #-------------------------------------------------------------------------------
    # We are using sudo so we need to make sure that env_reset is not present
    #-------------------------------------------------------------------------------
    sudo sed -i "s/^Defaults.*env_reset/#&/" /etc/sudoers

    #-------------------------------------------------------------------------------
    # Check if Ansible is installed
    #-------------------------------------------------------------------------------
    if ! command -v ansible &> /dev/null; then
        echo "ERROR : Ansible not found. Please install."
        exit 1
    fi

    #-------------------------------------------------------------------------------
    # Check is libvirt is installed
    #-------------------------------------------------------------------------------
    if ! command -v virsh &> /dev/null; then
        echo "ERROR : Libvirt not found. Please install."
        exit 1
    fi
}


# Create jumphost VM
create_jump() {
# Create VM image
    sudo mkdir -p "/var/lib/libvirt/images/$VM_NAME"
    sudo qemu-img create -f qcow2 \
        -o backing_file=/var/lib/libvirt/images/ubuntu-18.04.qcow2 \
        "/var/lib/libvirt/images/$VM_NAME/$VM_NAME.qcow2" 10G

# Create VM cloud-init configuration files
    cat <<EOL > user-data
    #cloud-config
    users:
      - name: $USERNAME
        ssh-authorized-keys:
          - $(cat "$HOME/.ssh/id_rsa.pub")
        sudo: ['ALL=(ALL) NOPASSWD:ALL']
        groups: sudo
        shell: /bin/bash
EOL
    cat <<EOL > meta-data
    local-hostname: $VM_NAME
EOL

# Create VM
    sudo genisoimage  -output "/var/lib/libvirt/images/$VM_NAME/$VM_NAME-cidata.iso" \
        -volid cidata -joliet -rock user-data meta-data
    sudo virt-customize -a "/var/lib/libvirt/images/$VM_NAME/$VM_NAME.qcow2" \
        --root-password password:"$ROOT_PASSWORD"
    sudo virt-install --connect qemu:///system --name "$VM_NAME" \
        --ram 4096 --vcpus=4 --os-type linux --os-variant ubuntu16.04 \
        --disk path="/var/lib/libvirt/images/$VM_NAME/$VM_NAME.qcow2",format=qcow2 \
        --disk "/var/lib/libvirt/images/$VM_NAME/$VM_NAME-cidata.iso",device=cdrom \
        --import --network network=default --network bridge="$BRIDGE",model=rtl8139 --noautoconsole
    jumpbox_ip=$(get_vm_ip)
    i=0
    while [ -z "$jumpbox_ip" ]; do
        sleep $((++i))
        jumpbox_ip=$(get_vm_ip)
    done
    i=0
    until nc -w5 -z "$jumpbox_ip" 22; do
        sleep $((++i))
    done
}

# Get jumphost VM IP
get_vm_ip() {
    sudo virsh domifaddr "$VM_NAME" | awk 'FNR == 3 {gsub(/\/.*/, ""); print $4}'
}

# Setup PXE network
setup_PXE_network() {
# Extract configuration from PDF/IDF
    PXE_IF=$(yq r "$CURRENTPATH"/hw_config/"$VENDOR"/idf.yaml engine.pxe_interface)
    PXE_IF_INDEX=$(yq r "$CURRENTPATH"/hw_config/"${VENDOR}"/idf.yaml idf.net_config.oob.interface)
    if [[ -z $PXE_IF || -z $PXE_IF_INDEX ]]; then
        echo 'one or more variables in IDF are undefined'
        exit 1
    fi
    PXE_IF_IP=$(yq r "$CURRENTPATH"/hw_config/"$VENDOR"/pdf.yaml jumphost.interfaces.["$PXE_IF_INDEX"].address)
    PXE_IF_MAC=$(yq r "$CURRENTPATH"/hw_config/"$VENDOR"/pdf.yaml jumphost.interfaces.["$PXE_IF_INDEX"].mac_address)
    if [[ -z $PXE_IF_IP || -z $PXE_IF_MAC ]]; then
        echo 'one or more variables in PDF are incorrect'
        exit 1
    fi
    export NETMASK=255.255.255.0
# SSH to jumphost
    # shellcheck disable=SC2087
    ssh -o StrictHostKeyChecking=no -tT "$USERNAME"@"$(get_vm_ip)" << EOF
sudo ifconfig $PXE_IF up
sudo ifconfig $PXE_IF $PXE_IF_IP netmask $NETMASK
sudo ifconfig $PXE_IF hw ether $PXE_IF_MAC
EOF
}

# Copy files needed by Infra engine & BMRA in the jumphost VM
copy_files_jump() {
    scp -r -o StrictHostKeyChecking=no \
    "$CURRENTPATH"/{hw_config/"$VENDOR"/,sw_config/"$INSTALLER"/} \
    "$USERNAME@$(get_vm_ip):$PROJECT_ROOT"
}

# Host Provisioning
provision_hosts() {
    # shellcheck disable=SC2087
    ssh -o StrictHostKeyChecking=no -tT "$USERNAME"@"$(get_vm_ip)" << EOF
# Install and run cloud-infra
if [ ! -d "${PROJECT_ROOT}/engine" ]; then
    ssh-keygen -t rsa -N "" -f ${PROJECT_ROOT}/.ssh/id_rsa
    git clone https://gerrit.nordix.org/infra/engine.git
    cp $PROJECT_ROOT/$VENDOR/{pdf.yaml,idf.yaml} \
    ${PROJECT_ROOT}/engine/engine
fi
cd ${PROJECT_ROOT}/engine/engine
./deploy.sh -s ironic -d centos7 \
-p file:///${PROJECT_ROOT}/engine/engine/pdf.yaml \
-i file:///${PROJECT_ROOT}/engine/engine/idf.yaml
EOF
}

# Setup networking on provisioned hosts (Adapt setup_network.sh according to your network setup)
setup_network() {
# Extract IPs of provisioned nodes from PDF/IDF. When running this function standalone, ensure
# to set $PXE_IF_INDEX
    MASTER_IP=$(yq r "$CURRENTPATH"/hw_config/"$VENDOR"/pdf.yaml nodes.[0].interfaces.["$PXE_IF_INDEX"].address)
    WORKER_IP=$(yq r "$CURRENTPATH"/hw_config/"$VENDOR"/pdf.yaml nodes.[1].interfaces.["$PXE_IF_INDEX"].address)
# SSH to jumphost
    # shellcheck disable=SC2087
    ssh -o StrictHostKeyChecking=no -tT "$USERNAME"@"$(get_vm_ip)" << EOF
ssh -o StrictHostKeyChecking=no root@$MASTER_IP \
    'bash -s' <  ${PROJECT_ROOT}/${VENDOR}/setup_network.sh
ssh -o StrictHostKeyChecking=no root@$WORKER_IP \
    'bash -s' <  ${PROJECT_ROOT}/${VENDOR}/setup_network.sh
EOF
}

# k8s Provisioning (currently BMRA)
provision_k8s() {
    # shellcheck disable=SC2087
    ssh -o StrictHostKeyChecking=no -tT "$USERNAME"@"$(get_vm_ip)" << EOF
# Install BMRA
if ! command -v docker; then
    curl -fsSL https://get.docker.com/ | sh
    printf "Waiting for docker service..."
    until sudo docker info; do
        printf "."
        sleep 2
    done
fi
if [ ! -d "${PROJECT_ROOT}/container-experience-kits" ]; then
    git clone --recurse-submodules --depth 1 https://github.com/intel/container-experience-kits.git -b v1.4.1 ${PROJECT_ROOT}/container-experience-kits/
    cp -r ${PROJECT_ROOT}/container-experience-kits/examples/group_vars examples/host_vars ${PROJECT_ROOT}/container-experience-kits/
#TODO Remove this once the reported issue is fixed in the next BMRA Release
    sed -i '/\openshift/a \    extra_args: --ignore-installed PyYAML' \
         ${PROJECT_ROOT}/container-experience-kits/roles/net-attach-defs-create/tasks/main.yml
fi
cp ${PROJECT_ROOT}/${INSTALLER}/inventory.ini \
    ${PROJECT_ROOT}/container-experience-kits/
cp ${PROJECT_ROOT}/${INSTALLER}/all.yml \
    ${PROJECT_ROOT}/container-experience-kits/group_vars/
cp ${PROJECT_ROOT}/${INSTALLER}/node1.yml \
    ${PROJECT_ROOT}/container-experience-kits/host_vars/
sudo docker run --rm \
-v ${PROJECT_ROOT}/container-experience-kits:/bmra \
-v ~/.ssh/:/root/.ssh/ rihabbanday/bmra-install:centos \
ansible-playbook -i /bmra/inventory.ini /bmra/playbooks/cluster.yml
EOF
}