#!/bin/bash

# EasyEngine update script.
# This script is designed to install latest EasyEngine or
# to update current EasyEngine from 2.x to 3.x

old_ee_version="2.2.3"
new_ee_version="3.0.2"
branch=$1

# Define echo function
# Blue color

function ee_lib_echo()
{
    echo $(tput setaf 4)$@$(tput sgr0)
}
# White color
function ee_lib_echo_info()
{
    echo $(tput setaf 7)$@$(tput sgr0)
}
# Red color
function ee_lib_echo_fail()
{
    echo $(tput setaf 1)$@$(tput sgr0)
}

# Capture errors
function ee_lib_error()
{
    echo "[ `date` ] $(tput setaf 1)$@$(tput sgr0)"
    exit $2
}

function install_dep()
{

    # Install Python3 on users system
    ee_lib_echo "Installing pre depedencies"
    if [ "$EE_LINUX_DISTRO" == "Ubuntu" ]; then
        apt-get -y install gcc python-software-properties software-properties-common python3 python3-apt python3-setuptools python3-dev sqlite3 git || ee_lib_error "Unable to install pre depedencies, exit status " 1
    elif [ "$EE_LINUX_DISTRO" == "Debian" ]; then
        apt-get -y install gcc graphviz python-software-properties python3 python3-apt python3-setuptools python3-dev sqlite3 git || ee_lib_error "Unable to pre depedencies, exit status " 1
    fi

    # Generating Locale
    locale-gen en &>> /dev/null
}

function sync_db()
{
    mkdir -p /var/lib/ee

    # Sqlite query to create table `sites` into ee.db which will be used by ee.3.0
    echo "CREATE TABLE sites (
           id INTEGER PRIMARY KEY     AUTOINCREMENT,
           sitename UNIQUE,
           site_type CHAR,
           cache_type CHAR,
           site_path  CHAR,
           created_on TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
           is_enabled INT,
           is_ssl INT,
           storage_fs CHAR,
           storage_db CHAR
        );" | sqlite3 /var/lib/ee/ee.db

    for site in $(ls /etc/nginx/sites-available/ | grep -v default);
    do
    if [ -f /etc/nginx/sites-available/$site ]; then
        ENABLE_STATUS='1'
    else
        ENABLE_STATUS='0'
    fi
    # Find out information about current NGINX configuration
    EE_SITE_CURRENT_TYPE=$(head -n1 /etc/nginx/sites-available/$site | grep "NGINX CONFIGURATION" | rev | cut -d' ' -f3,4,5,6,7 | rev | cut -d ' ' -f2,3,4,5)
    # Detect current website type and cache
    if [ "$EE_SITE_CURRENT_TYPE" = "HTML" ]; then
        EE_SITE_CURRENT="html"
        EE_SITE_CURRENT_CACHE="basic"
    elif [ "$EE_SITE_CURRENT_TYPE" = "PHP" ]; then
        EE_SITE_CURRENT="php"
        EE_SITE_CURRENT_CACHE="basic"
    elif [ "$EE_SITE_CURRENT_TYPE" = "MYSQL" ]; then
        EE_SITE_CURRENT="mysql"
        EE_SITE_CURRENT_CACHE="basic"
    # Single WordPress
    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSINGLE BASIC" ]; then
        EE_SITE_CURRENT="wp"
        EE_SITE_CURRENT_CACHE="basic"

    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSINGLE WP SUPER CACHE" ]; then
        EE_SITE_CURRENT="wp"
        EE_SITE_CURRENT_CACHE="wpsc"

    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSINGLE W3 TOTAL CACHE" ]; then
        EE_SITE_CURRENT="wp"
        EE_SITE_CURRENT_CACHE="w3tc"

    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSINGLE FAST CGI" ] || [ "$EE_SITE_CURRENT_TYPE" = "WPSINGLE FASTCGI" ]; then
        EE_SITE_CURRENT="wp"
        EE_SITE_CURRENT_CACHE="wpfc"

    # WordPress subdirectory
    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSUBDIR BASIC" ]; then
        EE_SITE_CURRENT="wpsubdir"
        EE_SITE_CURRENT_CACHE="basic"

    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSUBDIR WP SUPER CACHE" ]; then
        EE_SITE_CURRENT="wpsubdir"
        EE_SITE_CURRENT_CACHE="wpsc"

    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSUBDIR W3 TOTAL CACHE" ]; then
        EE_SITE_CURRENT="wpsubdir"
        EE_SITE_CURRENT_CACHE="w3tc"

    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSUBDIR FAST CGI" ] || [ "$EE_SITE_CURRENT_TYPE" = "WPSUBDIR FASTCGI" ]; then
        EE_SITE_CURRENT="wpsubdir"
        EE_SITE_CURRENT_CACHE="wpfc"

    # WordPress subdomain
    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSUBDOMAIN BASIC" ]; then
        EE_SITE_CURRENT="wpsubdomain"
        EE_SITE_CURRENT_CACHE="basic"

    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSUBDOMAIN WP SUPER CACHE" ]; then
        EE_SITE_CURRENT="wpsubdomain"
        EE_SITE_CURRENT_CACHE="wpsc"

    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSUBDOMAIN W3 TOTAL CACHE" ]; then
        EE_SITE_CURRENT="wpsubdomain"
        EE_SITE_CURRENT_CACHE="w3tc"

    elif [ "$EE_SITE_CURRENT_TYPE" = "WPSUBDOMAIN FAST CGI" ] || [ "$EE_SITE_CURRENT_TYPE" = "WPSUBDOMAIN FASTCGI" ]; then
        EE_SITE_CURRENT="wpsubdomain"
        EE_SITE_CURRENT_CACHE="wpfc"
    fi

    WEBROOT="/var/www/$site"

    # Insert query to insert old site information into ee.db
    echo "INSERT INTO sites (sitename, site_type, cache_type, site_path, is_enabled, is_ssl, storage_fs, storage_db)
    VALUES (\"$site\", \"$EE_SITE_CURRENT\", \"$EE_SITE_CURRENT_CACHE\", \"$WEBROOT\", \"$ENABLE_STATUS\", 0, 'ext4', 'mysql');" | sqlite3 /var/lib/ee/ee.db

    done
}


function install_ee3()
{
    # Remove old clone of EasyEngine (ee) if any
    rm -rf /tmp/easyengine &>> /dev/null

    # Clone EE 3.0 Python branch
    ee_lib_echo "Cloning EasyEngine 3"
    if [ "$branch" = "" ]; then
        branch=stable
    fi

    git clone -b $branch https://github.com/rtCamp/easyengine.git /tmp/easyengine --quiet > /dev/null || ee_lib_error "Unable to clone EasyEngine, exit status" 1

    cd /tmp/easyengine
    ee_lib_echo "Installing EasyEngine 3"
    python3 setup.py install || ee_lib_error "Unable to install EasyEngine 3.0, exit status " 1

}

function update_to_ee3()
{
    # Preserve old configuration
    ee_lib_echo "Updating EasyEngine 3 configuration"

    if [ -f /etc/nginx/nginx.conf ]; then
        sed -i "s/X-Powered-By.*/X-Powered-By \"EasyEngine $new_ee_version\";/" /etc/nginx/nginx.conf &>> /dev/null
    fi

    grant_host=$(grep grant-host /etc/easyengine/ee.conf | awk '{ print $3 }')
    db_name=$(grep db-name /etc/easyengine/ee.conf | awk '{ print $3 }')
    db_user=$(grep db-name /etc/easyengine/ee.conf | awk '{ print $3 }')
    wp_prefix=$(grep prefix /etc/easyengine/ee.conf | awk '{ print $3 }')
    wp_user=$(grep 'user ' /etc/easyengine/ee.conf | grep -v db-user |awk '{ print $3 }')
    wp_pass=$(grep password /etc/easyengine/ee.conf | awk '{ print $3 }')
    wp_email=$(grep email /etc/easyengine/ee.conf | awk '{ print $3 }')
    ip_addr=$(grep ip-address /etc/easyengine/ee.conf |awk -F'=' '{ print $2 }')

    sed -i "s/ip-address.*/ip-address = ${ip_addr}/" /etc/ee/ee.conf && \
    sed -i "s/grant-host.*/grant-host = ${grant_host}/" /etc/ee/ee.conf && \
    sed -i "s/db-name.*/db-name = ${db-name}/" /etc/ee/ee.conf && \
    sed -i "s/db-user.*/db-user = ${db_user}/" /etc/ee/ee.conf && \
    sed -i "s/prefix.*/prefix = ${wp_prefix}/" /etc/ee/ee.conf && \
    sed -i "s/^user.*/user = ${wp_user}/" /etc/ee/ee.conf && \
    sed -i "s/password.*/password = ${wp_password}/" /etc/ee/ee.conf && \
    sed -i "s/email.*/email = ${wp_email}/" /etc/ee/ee.conf || ee_lib_error "Unable to update configuration, exit status " 1


    # Remove old EasyEngine
    ee_lib_echo "Removing EasyEngine 2"
    rm -rf /etc/bash_completion.d/ee /etc/easyengine/ /usr/share/easyengine/ /usr/local/lib/easyengine /usr/local/sbin/easyengine /usr/local/sbin/ee /var/log/easyengine

    # Softlink to fix command not found error
    ln -s /usr/local/bin/ee /usr/local/sbin/ee || ee_lib_error "Unable to create softlink to old EasyEngine, exit status " 1

}

function update_to_ee_latest()
{
    ee_lib_echo "Updating Nginx configuration"
    if [ -f /etc/nginx/ee-nginx.conf ]; then
        sed -i "s/X-Powered-By.*/X-Powered-By \"EasyEngine $new_ee_version\";/" /etc/nginx/nginx.conf &>> /dev/null
    elif [ -f /etc/nginx/nginx.conf ]; then
        sed -i "s/X-Powered-By.*/X-Powered-By \"EasyEngine $new_ee_version\";/" /etc/nginx/nginx.conf &>> /dev/null
    fi
}

function git_init()
{
    # Do git intialisation on EasyEngine adn Nginx configuration
    if [ -d /etc/nginx ];then
        cd /etc/nginx
        if [ ! -d /etc/nginx/.git ]; then
            git init > /dev/null
        fi
        git add .
        git commit -am "Updated Nginx" > /dev/null
    fi
    cd /etc/ee
    if [ ! -d /etc/ee/.git ]; then
        git init > /dev/null
    fi
    git add .
    git commit -am "Installed/Updated to EasyEngine 3" > /dev/null

}

# Checking permissions
if [[ $EUID -ne 0 ]]; then
    ee_lib_echo_fail "Sudo privilege required..."
    ee_lib_echo_fail "Uses: wget -qO ee rt.cx/ee && sudo bash ee"
    exit 1
fi

# Execute: apt-get update
ee_lib_echo "Executing apt-get update"
apt-get update &>> /dev/null

# Checking lsb_release package
if [ ! -x /usr/bin/lsb_release ]; then
    ee_lib_echo "Installing lsb-release, please wait..."
    apt-get -y install lsb-release &>> /dev/null
fi

# Define variables for later use
readonly EE_LOG_DIR=/var/log/ee/
readonly EE_INSTALL_LOG=/var/log/ee/install.log
readonly EE_LINUX_DISTRO=$(lsb_release -i | awk '{print $3}')
readonly EE_DEBIAN_VERSION=$(lsb_release -sc)

# Checking linux distro
if [ "$EE_LINUX_DISTRO" != "Ubuntu" ] && [ "$EE_LINUX_DISTRO" != "Debian" ]; then
    ee_lib_echo_fail "EasyEngine (ee) is made for Ubuntu and Debian only as of now"
    ee_lib_echo_fail "You are free to fork EasyEngine (ee): https://github.com/rtCamp/easyengine/fork"
    ee_lib_echo_fail "EasyEngine (ee) only support Ubuntu 12.04/14.04 and Debian 7.x"
    exit 100
fi

# EasyEngine (ee) only support all Ubuntu/Debian distro except the distro reached EOL
lsb_release -d | egrep -e "12.04|14.04|wheezy" &>> /dev/null
if [ "$?" -ne "0" ]; then
    exit 100
fi


# Pre checks to avoid later screw ups
# Checking EasyEngine (ee) log directory
if [ ! -d $EE_LOG_DIR ]; then

    ee_lib_echo "Creating EasyEngine log directory, please wait..."
    mkdir -p $EE_LOG_DIR || ee_lib_error "Creating log  directory failed, exit status " 1

    # Create EasyEngine log files
    touch /var/log/ee/{ee.log,install.log}

    # Keep EasyEngine log folder accessible to root only
    chmod -R 700 /var/log/ee || ee_lib_error "Unable to setup log directory permissions , exit status " 1
fi

if [ -f /usr/local/sbin/easyengine ]; then
    # Check old EasyEngine version
    ee version | grep ${old_ee_version} &>> /dev/null
    if [[ $? -ne 0 ]]; then
        ee_lib_echo "EasyEngine $old_ee_version not found on your system" | tee -ai $EE_INSTALL_LOG
        ee_lib_echo "Updating your EasyEngine to $old_ee_version for compability" | tee -ai $EE_INSTALL_LOG
        wget -q https://raw.githubusercontent.com/rtCamp/easyengine/old-stable/bin/update && bash update | tee -ai $EE_INSTALL_LOG
        if [[ $? -ne 0 ]]; then
            ee_lib_echo_info "Unbale to update EasyEngine2 to $old_ee_version"
            exit 1
        fi
    fi
    install_dep | tee -ai $EE_INSTALL_LOG
    sync_db | tee -ai $EE_INSTALL_LOG
    install_ee3 | tee -ai $EE_INSTALL_LOG
    update_to_ee3 | tee -ai $EE_INSTALL_LOG
    git_init | tee -ai $EE_INSTALL_LOG
elif [ ! -f /usr/local/bin/ee ]; then
    install_dep | tee -ai $EE_INSTALL_LOG
    install_ee3 | tee -ai $EE_INSTALL_LOG
    git_init | tee -ai $EE_INSTALL_LOG
else
    ee -v 2>&1 | grep $new_ee_version &>> /dev/null
    if [[ $? -ne 0 ]];then
        read -p "Update EasyEngine to $new_ee_version (y/n): " ee_ans
        if [ "$ee_ans" = "y" ] || [ "$ee_ans" = "Y" ]; then
            install_dep | tee -ai $EE_INSTALL_LOG
            update_to_ee_latest | tee -ai $EE_INSTALL_LOG
            install_ee3 | tee -ai $EE_INSTALL_LOG
            git_init | tee -ai $EE_INSTALL_LOG
            service nginx reload &>> /dev/null
        fi
    else
        ee_lib_echo_fail "You allready have EasyEngine $new_ee_version" | tee -ai $EE_INSTALL_LOG
        exit 1
    fi
fi