#!/bin/bash -e

# Installs Salt and configure minimal SaltMaster or Minion to be used with:
# - http://github.com/salt-formulas
# - http://github.com/salt-formulas/salt-formula-salt (salt.master sls)

# TODO:
# - use PPA repository as formula source
# - support for spm/yum

# Source specific env vars.
for path in /srv/salt . /srv/salt/reclass/classes/cluster /srv/salt/reclass/classes/cluster/${CLUSTER_NAME}; do
  export $(find $path -maxdepth 1 -name '*.env' 2> /dev/null | xargs --no-run-if-empty cat ) > /dev/null
done;

# DEAULTS
# salt apt repository
test -e /etc/lsb-release && eval $(cat /etc/lsb-release)
which lsb_release && DISTRIB_CODENAME=${DISTRIB_CODENAME:-$(lsb_release -cs)}
#
export APT_REPOSITORY="deb [arch=amd64] http://apt.mirantis.com/${DISTRIB_CODENAME} ${DISTRIB_REVISION:-stable} salt"
export APT_REPOSITORY_GPG=${APT_REPOSITORY_GPG:-http://apt.mirantis.com/public.gpg}

# reclass
export RECLASS_ADDRESS=${RECLASS_ADDRESS:-https://github.com/salt-formulas/openstack-salt.git} # https/git

# formula
export FORMULAS_BASE=${FORMULAS_BASE:-https://github.com/salt-formulas}
export FORMULAS_PATH=${FORMULAS_PATH:-/usr/share/salt-formulas}
export FORMULAS_BRANCH=${FORMULAS_BRANCH:-master}
export FORMULAS_SOURCE=${FORMULAS_SOURCE:-pkg} # pkg/git
# essential set of formulas (known to by used on cfg01 node for most setups)
FORMULAS_SALT_MASTER=${FORMULAS_SALT_MASTER:- $EXTRA_FORMULAS memcached openssh ntp nginx collectd sensu heka sphinx mysql grafana libvirt rsyslog glusterfs postfix xtrabackup freeipa prometheus telegraf elasticsearch kibana rundeck devops-portal horizon}
# minimal set of formulas for salt-master bootstrap
declare -a FORMULAS_SALT_MASTER=(linux reclass salt git $(echo $FORMULAS_SALT_MASTER))
export FORMULAS_SALT_MASTER

# system / host
export HOSTNAME=${HOSTNAME:-cfg01}
export DOMAIN=${DOMAIN:-bootstrap.local}

# salt
export SALT_MASTER=${SALT_MASTER:-127.0.0.1} # ip or fqdn
export MINION_ID=${MINION_ID:-${HOSTNAME}.${DOMAIN}}

# saltstack
BOOTSTRAP_SALTSTACK=${BOOTSTRAP_SALTSTACK:-True}
BOOTSTRAP_SALTSTACK_OPTS=${BOOTSTRAP_SALTSTACK_OPTS:- -dX stable 2016.3 }

# ENVIRONMENT
#############
SALT_SOURCE=${SALT_SOURCE:-pkg}
SALT_VERSION=${SALT_VERSION:-latest}


if [ "$FORMULAS_SOURCE" == "git" ]; then
  SALT_ENV=${SALT_ENV:-dev}
elif [ "$FORMULAS_SOURCE" == "pkg" ]; then
  SALT_ENV=${SALT_ENV:-prd}
fi

eval $(cat /etc/*release 2> /dev/null)
PLATFORM_FAMILY=$(echo ${ID_LIKE// */} | tr A-Z a-z)

case $PLATFORM_FAMILY in
  debian )
      PKGTOOL="$SUDO apt-get"
      test ${VERSION_ID//\.*/} -ge 16 && {
        SVCTOOL=service
      } || { SVCTOOL=service
      }
    ;;
  rhel )
      PKGTOOL="$SUDO yum"
      test ${VERSION_ID//\.*/} -ge 7 && {
        SVCTOOL=systemctl
      } || { SVCTOOL=service
      }
    ;;
esac

export PLATFORM_FAMILY
export PKGTOOL
export SVCTOOL

# FUNCTIONS
###########
configure_pkg_repo()
{

    case $PLATFORM_FAMILY in
      debian)
          if [ -n "$APT_REPOSITORY_PPA" ]; then
            which add-apt-repository || $SUDO apt-get install -y software-properties-common
            $SUDO add-apt-repository -y ppa:${APT_REPOSITORY_PPA}
          else
            echo -e  "$APT_REPOSITORY " | $SUDO tee /etc/apt/sources.list.d/bootstrap.list >/dev/null
            curl -sL $APT_REPOSITORY_GPG | $SUDO apt-key add -
          fi
          $SUDO apt-get clean
          $SUDO apt-get update
        ;;
      rhel)
          $SUDO yum install -y https://repo.saltstack.com/yum/redhat/salt-repo-latest-1.el${VERSION_ID}.noarch.rpm
          $SUDO yum clean all
        ;;
    esac

}

configure_salt_master()
{

  echo "Configuring salt-master ..."

  [ ! -d /etc/salt/master.d ] && mkdir -p /etc/salt/master.d
  cat <<-EOF > /etc/salt/master.d/master.conf
	file_roots:
	  base:
	  - /usr/share/salt-formulas/env
	  prd:
	  - /srv/salt/env/prd
	  dev:
	  - /srv/salt/env/dev
	pillar_opts: False
	open_mode: True
	reclass: &reclass
	  storage_type: yaml_fs
	  inventory_base_uri: /srv/salt/reclass
	ext_pillar:
	  - reclass: *reclass
	master_tops:
	  reclass: *reclass
EOF

  echo "Configuring reclass ..."

  [ ! -d /etc/reclass ] && mkdir /etc/reclass
  cat <<-EOF > /etc/reclass/reclass-config.yml
	storage_type: yaml_fs
	pretty_print: True
	output: yaml
	inventory_base_uri: /srv/salt/reclass
EOF

  if [ ! -d /srv/salt/reclass ]; then
    # No reclass at all, clone from given address
    ssh-keyscan -H github.com >> ~/.ssh/known_hosts || true
    if echo ${RECLASS_BRANCH:-master} | egrep -q "^refs"; then		
        git clone ${RECLASS_ADDRESS} /srv/salt/reclass		
        cd /srv/salt/reclass		
        git fetch ${RECLASS_ADDRESS} ${RECLASS_BRANCH:-master} && git checkout FETCH_HEAD		
        cd -		
    else		
        git clone -b ${RECLASS_BRANCH:-master} ${RECLASS_ADDRESS} /srv/salt/reclass;		
    fi;
  fi;

  cd /srv/salt/reclass
  if [ ! -d /srv/salt/reclass/classes/system/linux ]; then
    # Possibly subrepo checkout needed
    git submodule update --init --recursive
  fi

  #sed -ie "s#\(reclass_data_revision.\).*#\1 $RECLASS_BRANCH#" $(find nodes -name ${MASTER_HOSTNAME}.yml|tail -n1)

  mkdir -vp /srv/salt/reclass/nodes
  CONFIG=$(find /srv/salt/reclass/nodes -name ${MINION_ID}.yml| grep yml | tail -n1)
  CONFIG=${CONFIG:-/srv/salt/reclass/nodes/${MINION_ID}.yml}
  if [[ $SALT_MASTER_BOOTSTRAP_MINIMIZED =~ ^(True|true|1|yes)$ || ! -f "${CONFIG}" ]]; then
  cat <<-EOF > ${CONFIG}
	classes:
	- service.git.client
	- system.linux.system.single
	- system.salt.master.single
	- system.salt.master.$FORMULAS_SOURCE
	- system.reclass.storage.salt
	parameters:
	  _param:
	    reclass_data_repository: "$RECLASS_ADDRESS"
	    reclass_data_revision: ${RECLASS_BRANCH:-master}
	    salt_formula_branch: ${SALT_FORMULAS_BRANCH:-master}
	    reclass_config_master: $SALT_MASTER
	    single_address: $SALT_MASTER
	    salt_master_host: $SALT_MASTER
	    salt_master_base_environment: $SALT_ENV
	    linux_system_codename: $DISTRIB_CODENAME
	  linux:
	    system:
	      name: $MINION_ID
	      domain: $DOMAIN
	# ########
EOF

    if [ "$SALT_VERSION" == "latest" ]; then
      VERSION=""
    else
      VERSION="version: $SALT_VERSION"
    fi

    cat <<-EOF >> ${CONFIG}
		  salt:
		    master:
		      accept_policy: open_mode
		      source:
		        engine: $SALT_SOURCE
		        $VERSION
		    minion:
		      source:
		        engine: $SALT_SOURCE
		        $VERSION
		# ########
		# vim: ft=yaml sw=2 ts=2 sts=2
EOF
  fi
}

configure_salt_minion()
{
  [ ! -d /etc/salt/minion.d ] && mkdir -p /etc/salt/minion.d
  cat <<-EOF > /etc/salt/minion.d/minion.conf
	master: $SALT_MASTER
	id: $MINION_ID
	EOF
}


install_salt_master_pkg()
{
    echo -e "\nPreparing base OS repository ...\n"

    configure_pkg_repo

    echo -e "\nInstalling salt master ...\n"

    case $PLATFORM_FAMILY in
      debian)
          $SUDO apt-get install -y git
	  which reclass || $SUDO apt install -qqq -y reclass
          curl -L https://bootstrap.saltstack.com | $SUDO sh -s -- -M ${BOOTSTRAP_SALTSTACK_OPTS} &>/dev/null || true
        ;;
      rhel)
          yum install -y git
          which reclass || $SUDO yum install -y reclass
          curl -L https://bootstrap.saltstack.com | $SUDO sh -s -- -M ${BOOTSTRAP_SALTSTACK_OPTS} &>/dev/null || true
        ;;
    esac
    
    which reclass-salt || {
      test -e /usr/share/reclass/reclass-salt && {
        ln -fs /usr/share/reclass/reclass-salt /usr/bin
      }
    }

    configure_salt_master

    echo -e "\nRestarting services ...\n"
    [ -f /etc/salt/pki/minion/minion_master.pub ] && rm -f /etc/salt/pki/minion/minion_master.pub
    $SVCTOOL salt-master restart
}

install_salt_master_pip()
{
    echo -e "\nPreparing base OS repository ...\n"

    case $PLATFORM_FAMILY in
      debian)
          $SUDO apt-get install -y python-pip python-dev zlib1g-dev git
	  which reclass || $SUDO apt-get install -y reclass
        ;;
      rhel)
	  $SUDO yum install -y git
	  which reclass || $SUDO yum install -y reclass
        ;;
    esac

    echo -e "\nInstalling salt master ...\n"
    # TODO: replace with saltstack bootstrap script
    
    if [ "$SALT_VERSION" == "latest" ]; then
      pip install salt
    else
      pip install salt==$SALT_VERSION
    fi

    curl -Lo /etc/init.d/salt-master https://anonscm.debian.org/cgit/pkg-salt/salt.git/plain/debian/salt-master.init && chmod 755 /etc/init.d/salt-master
    ln -s /usr/local/bin/salt-master /usr/bin/salt-master

    which reclass-salt || {
      test -e /usr/share/reclass/reclass-salt && {
        ln -fs /usr/share/reclass/reclass-salt /usr/bin
      }
    }

    configure_salt_master

    echo -e "\nRestarting services ...\n"
    [ -f /etc/salt/pki/minion/minion_master.pub ] && rm -f /etc/salt/pki/minion/minion_master.pub
    $SVCTOOL salt-master restart
}


install_salt_minion_pkg()
{

    echo -e "\nInstalling salt minion ...\n"

    case $PLATFORM_FAMILY in
      debian)
          curl -L https://bootstrap.saltstack.com | $SUDO sh -s -- ${BOOTSTRAP_SALTSTACK_OPTS} &>/dev/null || true
      ;;
      rhel)
          curl -L https://bootstrap.saltstack.com | $SUDO sh -s -- ${BOOTSTRAP_SALTSTACK_OPTS} &>/dev/null || true
      ;;
    esac


    configure_salt_minion

    $SVCTOOL salt-minion restart
}

install_salt_minion_pip()
{
    echo -e "\nInstalling salt minion ...\n"

    curl -Lo /etc/init.d/salt-minion https://anonscm.debian.org/cgit/pkg-salt/salt.git/plain/debian/salt-minion.init && chmod 755 /etc/init.d/salt-minion
    ln -s /usr/local/bin/salt-minion /usr/bin/salt-minion

    configure_salt_minion
    $SVCTOOL salt-minion restart
}


install_salt_formula_pkg()
{
    configure_pkg_repo

    case $PLATFORM_FAMILY in
      debian)
          echo "Configuring necessary formulas ..."

          [ ! -d /srv/salt/reclass/classes/service ] && mkdir -p /srv/salt/reclass/classes/service
          # Set essentials if FORMULAS_SALT_MASTER is not defined at all
          [ -z ${FORMULAS_SALT_MASTER+x} ] && declare -a FORMULAS_SALT_MASTER=("linux" "reclass" "salt" "memcached")
          for formula_service in "${FORMULAS_SALT_MASTER[@]}"; do
              echo -e "\nConfiguring salt formula ${formula_service} ...\n"
              [ ! -d "${FORMULAS_PATH}/env/${formula_service}" ] && \
                  if ! $SUDO apt-get install -y salt-formula-${formula_service}; then
                    echo -e "\nInstall salt-formula-${formula_service} failed.\n"
                    exit 1
                  fi
              [ ! -L "/srv/salt/reclass/classes/service/${formula_service}" ] && \
                  ln -sf ${FORMULAS_PATH}/reclass/service/${formula_service} /srv/salt/reclass/classes/service/${formula_service}
          done
        ;;
      rhel)
        # TODO
      ;;
    esac

    [ ! -d /srv/salt/env ] && mkdir -p /srv/salt/env || echo ""
    [ ! -L /srv/salt/env/prd ] && ln -s ${FORMULAS_PATH}/env /srv/salt/env/prd || echo ""
}

install_salt_formula_git()
{
    echo "Configuring necessary formulas ..."

    [ ! -d /srv/salt/reclass/classes/service ] && mkdir -p /srv/salt/reclass/classes/service
    # Set essentials if FORMULAS_SALT_MASTER is not defined at all
    [ -z ${FORMULAS_SALT_MASTER+x} ] && declare -a FORMULAS_SALT_MASTER=("linux" "reclass" "salt" "memcached")
    for formula_service in "${FORMULAS_SALT_MASTER[@]}"; do
        echo -e "\nConfiguring salt formula ${formula_service} ...\n"
        _BRANCH=${FORMULAS_BRANCH}
        [ ! -d "${FORMULAS_PATH}/env/_formulas/${formula_service}" ] && {
            if ! git ls-remote --exit-code --heads ${FORMULAS_BASE}/salt-formula-${formula_service}.git ${_BRANCH}; then
              # Fallback to the master branch if the branch doesn't exist for this repository
              _BRANCH=master
            fi
            if ! git clone ${FORMULAS_BASE}/salt-formula-${formula_service}.git ${FORMULAS_PATH}/env/_formulas/${formula_service} -b ${_BRANCH}; then
              echo -e "\nCloning of ${FORMULAS_BASE}/salt-formula-${formula_service}.git failed.\n"
              exit 1
            fi
          } || {
            cd ${FORMULAS_PATH}/env/_formulas/${formula_service};
            git fetch origin/${_BRANCH} || git fetch --all
            git checkout ${_BRANCH} && git pull || git pull;
            cd -
        }
        [ ! -L "/usr/share/salt-formulas/env/${formula_service}" ] && \
            ln -sf ${FORMULAS_PATH}/env/_formulas/${formula_service}/${formula_service} /usr/share/salt-formulas/env/${formula_service}
        [ ! -L "/srv/salt/reclass/classes/service/${formula_service}" ] && \
            ln -sf ${FORMULAS_PATH}/env/_formulas/${formula_service}/metadata/service /srv/salt/reclass/classes/service/${formula_service}
    done

    [ ! -d /srv/salt/env ] && mkdir -p /srv/salt/env || echo ""
    [ ! -L /srv/salt/env/dev ] && ln -s /usr/share/salt-formulas/env /srv/salt/env/dev || echo ""
}

# MAIN
####
[[ "$0" != "$BASH_SOURCE" ]] || {
# unless file is being sourced

  # DEBUGING
  #set -x
  #test -e $(dirname $0)/env/salt.env && source $(dirname $0)/env/salt.env
  #set

  # CLI
  while [ x"$1" != x"" ]; do
    which curl &>/dev/null || $PKGTOOL -y install curl &>/dev/null

    case $1 in
        master )
          install_salt_master_$SALT_SOURCE
          install_salt_minion_$SALT_SOURCE
          install_salt_formula_$FORMULAS_SOURCE
          ;;
        minion )
          install_salt_minion_$SALT_SOURCE
          ;;
    esac
    shift
  done
  echo DONE
}