#!/bin/bash



## 0k git remote path
GIT_0K_BASE=${GIT_0K_BASE:-"0k-ro:/var/git"}

## 0k git remote options
GIT_0K_CLONE_OPTIONS=${GIT_0K_CLONE_OPTIONS:-""}


##
## Install 0k-manage
##

mkdir -p /opt/apps
(
    if ! [ -d "/opt/apps/0k-manage" ]; then
        cd /opt/apps &&
        git clone $GIT_0K_CLONE_OPTIONS "$GIT_0K_BASE/0k/0k-manage.git" &&
        cd /opt/apps/0k-manage &&
        git checkout 0k/prod/master
    fi

    pip install sact.epoch || exit 1
    if [ "$(python -c 'import sact.epoch' 2>&1 | tail -n 1)" == "ImportError: No module named interface" ]; then
        echo "Error: conflicting installation of zope.interface detected. Trying workaround."
        (
            cd /usr/local/lib/python2.7/dist-packages
            mv zope zope-bad
        ) &&
        pip install zope.interface --upgrade &&
        pip install zope.component --upgrade
        if [ "$(python -c 'import sact.epoch' 2>&1 | tail -n 1)" == "" ]; then
            echo "Workaround worked."
        else
            echo "Failed work around."
            exit 1
        fi
    fi
    # ln -sf /opt/apps/0k-manage/src/bin/* /usr/local/bin/

)


##
## Install 0k-charms
##

(
    if ! [ -d "/opt/apps/0k-charms" ]; then
        cd /opt/apps &&
        git clone $GIT_0K_CLONE_OPTIONS "$GIT_0K_BASE/0k/0k-charms.git" &&
        cd /opt/apps/0k-charms &&
        git checkout master
    fi

    if ! [ -d "/srv/charm-store" ]; then
        mkdir -p /srv/charm-store &&
            find /opt/apps/0k-charms -type d -exec /usr/bin/test -e {}/metadata.yml \
                 -o -e {}/metadata.yaml \; -print | while read f; do
                ln -sf "$f" /srv/charm-store/
            done
    fi

)


##
## Install lxc-scripts
##

(
    if ! [ -d "/opt/apps/lxc-scripts" ]; then
        cd /opt/apps &&
        git clone $GIT_0K_CLONE_OPTIONS "$GIT_0K_BASE/0k/lxc-scripts.git" &&
        cd /opt/apps/0k-manage &&
        git checkout master &&
        ln -sf /opt/apps/lxc-scripts/bin/lxc-* /usr/local/sbin/ &&
        [ -d /usr/lib/lxc/templates ] && {
            ln -sf /opt/apps/lxc-scripts/usr/lib/lxc/templates/lxc-0k-ubuntu-cloud /usr/lib/lxc/templates/
            echo TEMPLATE_PATH=/usr/lib/lxc/templates >> /etc/default/lxc
        }
        [ -d /usr/share/lxc/templates ] && {
            ln -sf /opt/apps/lxc-scripts/usr/lib/lxc/templates/lxc-0k-ubuntu-cloud /usr/share/lxc/templates
            echo TEMPLATE_PATH=/usr/share/lxc/templates >> /etc/default/lxc
        }
    fi
)

##
## Install 0k.io certificate authority
##

## Note that docker should be installed after (or be restarted).

type -p curl >/dev/null 2>&1 || apt-get install -y curl </dev/null

if ! [ -r /etc/ssl/ca.0k.io.pem ]; then

    ## This does not seem to work anymore (docker v1.12, ubutnu 14.04 on gani)
    echo "Fetching 0k.io CA certificate..."
    curl http://docker.0k.io/get/ca.0k.io.pem > /etc/ssl/ca.0k.io.pem
    cat /etc/ssl/ca.0k.io.pem >> /etc/ssl/certs/ca-certificates.crt

    ## This is the new way: https://docs.docker.com/engine/security/certificates/
    mkdir -p /etc/docker/certs.d/docker.0k.io
    ln -sf /etc/ssl/ca.0k.io.pem /etc/docker/certs.d/docker.0k.io/ca.crt
fi

service docker restart

echo "Login into our server."
docker login -u vm -p iamavm -e vm@0k.io https://docker.0k.io


sed -ri 's/^#(net\.ipv4\.ip_forward=1)$/\1/g' /etc/sysctl.conf
sysctl -w net.ipv4.ip_forward=1


##
## docker-compose
##

if type -p docker-compose >/dev/null; then
    #echo "Found docker-compose..." >&2
    if ! docker-compose --version >/dev/null 2>&1; then
        echo "'docker-compose' failed ! Please check your docker-compose binary."
        echo "Failed install."
        docker-compose --version
        exit 1
    fi
    VALID_VERSION_TEXT="docker-compose version 1.21.2, build a133471"
    if [ "$(docker-compose --version)" != "$VALID_VERSION_TEXT" ]; then
        echo "Invalid version of docker-compose: we need exactly:"
        echo "version text: $VALID_VERSION_TEXT"
        echo "Failed install."
        exit 1
    fi
else
    if ! [ -d /opt/apps/docker-compose ]; then
        (
            mkdir -p /opt/apps
            cd /opt/apps
            git clone https://github.com/docker/compose.git docker-compose &&
                cd docker-compose &&
                git checkout 0898c783ad2e0d01bd55b47fcb9eb7183edc1015 ## version pinning
        )
    fi

    mkdir -p /opt/venv
    if ! type -p virtualenv >/dev/null; then
        pip install virtualenv==13.1.2
    fi
    if ! [ -d /opt/venv/docker-compose ]; then
        virtualenv /opt/venv/docker-compose/
    fi

    . /opt/venv/docker-compose/bin/activate

    ( cd /opt/apps/docker-compose &&
            python setup.py install )
    if ! pip freeze | grep "^requests==2.6.1\$" >/dev/null 2>&1; then
        pip install requests==2.6.1 --upgrade
    fi
    deactivate

    mkdir -p /etc/compose
    if ! grep "^. /opt/venv/docker-compose/bin/activate$" /etc/compose/local.conf >/dev/null 2>&1; then
        cat <<EOF >> /etc/compose/local.conf
. /opt/venv/docker-compose/bin/activate
EOF
    fi
fi

if ! [ -d "/opt/apps/0k-compose" ]; then
    mkdir -p /opt/apps && cd /opt/apps
    git clone "$GIT_0K_BASE"/0k/0k-compose.git
fi
[ -e /usr/local/bin/compose ] || ln -sfv /opt/apps/0k-compose/bin/compose /usr/local/bin/

cat <<EOF > /etc/default/datastore
DATASTORE=/srv/datastore
SNAPSHOT_BACKUP=/var/backups/snapshot
EOF

cat <<EOF > /etc/default/compose

## if not provided, this will be the default service launched.
export DEFAULT_SERVICES=""

export DEFAULT_PROJECT_NAME=$(hostname | cut -f 2 -d . )

export DOCKER_DATASTORE=\$([ -e /etc/default/datastore ] && . /etc/default/datastore && echo \$DATASTORE)
export DATASTORE=\$DOCKER_DATASTORE/data
export CONFIGSTORE=\$DOCKER_DATASTORE/config

EOF


echo "DEFAULT_COMPOSE_FILE=/etc/compose/compose.yml" >> /etc/compose/local.conf