#!/bin/bash

set -eux

## 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/0k-manage &&
        git pull -r
    else
        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/

)


##
## Remove possible previous docker-compose related stuff
##

if [ -f /etc/compose/local.conf ]; then
    sed -ri 's%^(. /opt/venv/docker-compose/bin/activate)$%# \1 ## docker-compsoe not needed anymore%g' \
        /etc/compose/local.conf
fi


##
## Install 0k-charm
##

(
    apt-get install -y kal-shlib-charm kal-shlib-cache kal-shlib-cmdline </dev/null
    if [ -d "/opt/apps/0k-charm" ]; then
        cd /opt/apps/0k-charm &&
            git checkout master &&
            git pull -r
    else
        cd /opt/apps &&
        git clone $GIT_0K_CLONE_OPTIONS "$GIT_0K_BASE/0k/0k-charm.git"
    fi

    ln -sfn /opt/apps/0k-charm/bin/charm /usr/local/sbin/charm
)



##
## Install 0k-charms
##

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

    if ! [ -d "/srv/charm-store" ]; then
        mkdir -p /srv/charm-store
    fi
    ln -sfn /opt/apps/0k-charms /srv/charm-store/0k-charms

)


##
## 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"
    fi

    cd /opt/apps/lxc-scripts &&
    git checkout master &&
    git pull -r &&
    ln -sfn /opt/apps/lxc-scripts/bin/lxc-* /usr/local/sbin/ &&

    if [ -f /etc/default/lxc ]; then
        if [ -f /etc/default/lxc.pre-install ]; then
            cp /etc/default/lxc.pre-install /etc/default/lxc
        else
            cp /etc/default/lxc /etc/default/lxc.pre-install
        fi
        [ -d /usr/lib/lxc/templates ] && {
            ln -sfn /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 -sfn /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-docker
##

(
    if [ -d "/opt/apps/0k-docker" ]; then
        cd /opt/apps/0k-docker &&
            git checkout master &&
            git pull -r
    else
        cd /opt/apps &&
            git clone $GIT_0K_CLONE_OPTIONS "$GIT_0K_BASE/0k/0k-docker"
    fi

    ln -sfn /opt/apps/0k-docker/bin/* /usr/local/sbin/
    ln -sfn /opt/apps/0k-docker/bin/docker-clean /etc/cron.daily/docker-clean
    ## in update, will remove broken links to binaries that were removed
    find -L /usr/local/sbin -maxdepth 1 -type l -ilname /opt/apps/0k-docker/\* -delete
)



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

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

apt-get install -y curl </dev/null


## This does not seem to work anymore (docker v1.12, ubutnu 14.04 on gani)
ca=/etc/ssl/ca.0k.io.pem
need_restart=
oldmd5=
if [ -f "$ca" ]; then
    oldmd5=$(md5sum "$ca")
fi
echo "Fetching 0k.io CA certificate..."
curl http://docker.0k.io/get/ca.0k.io.pem > "$ca"
if [[ "$(md5sum "$ca")" != "$oldmd5" ]]; then
    need_restart=1
    cat "$ca" >> /etc/ssl/certs/ca-certificates.crt
fi

## This is the new way: https://docs.docker.com/engine/security/certificates/
ca_ln="/etc/docker/certs.d/docker.0k.io/ca.crt"
mkdir -p "$(dirname "$ca_ln")"
if ! [ -L "$ca_ln" ] || [ "$(realpath "$ca_ln")" != "$ca" ] ; then
    ln -sfn "$ca" "$ca_ln"
    need_restart=1
fi

if [ "$need_restart" ]; then
    service docker restart
fi

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


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


##
## Installation of compose
##

docker pull docker.0k.io/compose
if [ -d "/opt/apps/0k-compose" ]; then
    cd "/opt/apps/0k-compose" &&
        git pull -r
else
    mkdir -p /opt/apps && cd /opt/apps
    git clone "$GIT_0K_BASE"/0k/0k-compose.git
fi
[ -e /usr/local/bin/compose ] || ln -sfnv /opt/apps/0k-compose/bin/compose /usr/local/bin/
rm -rf /var/cache/compose


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 . )
DEFAULT_PROJECT_NAME=\${DEFAULT_PROJECT_NAME,,}  ## to lowercase

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

EOF

if ! egrep "^DEFAULT_COMPOSE_FILE=/etc/compose/compose.yml$" /etc/compose/local.conf >/dev/null 2>&1; then
    mkdir /etc/compose -p
    touch /etc/compose/local.conf
    echo "DEFAULT_COMPOSE_FILE=/etc/compose/compose.yml" >> /etc/compose/local.conf
fi


##
## Install pgm
##


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

    ln -sfnv /opt/apps/0k-pgm/bin/* /usr/local/bin/
    find -L /usr/local/bin -maxdepth 1 -type l -ilname /opt/apps/0k-pgm/bin/\* -delete
    apt-get install -y --force-yes pv buffer < /dev/null
    apt-get install -y postgresql-client </dev/null
)