#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# mailpile app
#
# License
# =======
#
# Copyright (C) 2016 Bob Mottram <bob@freedombone.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

VARIANTS="full full-vim mailbox"

IN_DEFAULT_INSTALL=0
SHOW_ON_ABOUT=1

MAILPILE_DOMAIN_NAME=
MAILPILE_CODE=
MAILPILE_ONION_PORT=8103
MAILPILE_REPO="https://github.com/mailpile/Mailpile"
MAILPILE_COMMIT='352ca27a29f7d9525298264c04bc5c7d55887276'
MAILPILE_PORT=33411

mailpile_variables=(MAILPILE_REPO
                    MAILPILE_COMMIT
                    MAILPILE_DOMAIN_NAME
                    MAILPILE_CODE
                    ONION_ONLY
                    DDNS_PROVIDER
                    MY_USERNAME)

function remove_user_mailpile {
    remove_username="$1"
}

function add_user_mailpile {
    echo '0'
}

function install_interactive_mailpile {
    if [ ! $ONION_ONLY ]; then
        ONION_ONLY='no'
    fi

    if [[ $ONION_ONLY != "no" ]]; then
        MAILPILE_DOMAIN_NAME='mailpile.local'
        write_config_param "MAILPILE_DOMAIN_NAME" "$MAILPILE_DOMAIN_NAME"
    else
        function_check interactive_site_details
        interactive_site_details "mailpile" "MAILPILE_DOMAIN_NAME" "MAILPILE_CODE"
    fi
    APP_INSTALLED=1
}

function change_password_mailpile {
    echo -n ''
}

function reconfigure_mailpile {
    echo -n ''
}

function upgrade_mailpile {
    read_config_param "MAILPILE_DOMAIN_NAME"

    function_check set_repo_commit
    set_repo_commit /var/www/$MAILPILE_DOMAIN_NAME/mail "mailpile commit" "$MAILPILE_COMMIT" $MAILPILE_REPO
}

function backup_local_mailpile {
    if [ ! -f /etc/systemd/system/mailpile.service ]; then
        return
    fi
    MAILPILE_DOMAIN_NAME='mailpile.local'
    if grep -q "mailpile domain" $COMPLETION_FILE; then
        MAILPILE_DOMAIN_NAME=$(get_completion_param "mailpile domain")
    fi
    source_directory=/var/www/${MAILPILE_DOMAIN_NAME}/mail/.local
    if [ -d $source_directory ]; then
        systemctl stop mailpile

        function_check backup_directory_to_usb
        backup_directory_to_usb $source_directory mailpile

        systemctl start mailpile
    fi
}

function restore_local_mailpile {
    if [ ! -f /etc/systemd/system/mailpile.service ]; then
        return
    fi
    MAILPILE_DOMAIN_NAME='mailpile.local'
    if grep -q "mailpile domain" $COMPLETION_FILE; then
        MAILPILE_DOMAIN_NAME=$(get_completion_param "mailpile domain")
    fi
    if [ $MAILPILE_DOMAIN_NAME ]; then
        systemctl stop mailpile

        temp_restore_dir=/root/tempmailpile
        restore_directory_from_usb $temp_restore_dir mailpile
        if [ -d /var/www/${MAILPILE_DOMAIN_NAME}/mail/.local ]; then
            mv /var/www/${MAILPILE_DOMAIN_NAME}/mail/.local /var/www/${MAILPILE_DOMAIN_NAME}/mail/.previous
        fi
        temp_source_dir=$(find ${temp_restore_dir} -name ".local")
        cp -r ${temp_source_dir} /var/www/${MAILPILE_DOMAIN_NAME}/mail/
        if [ ! "$?" = "0" ]; then
            if [ -d mv /var/www/${MAILPILE_DOMAIN_NAME}/mail/.previous ]; then
                if [ -d /var/www/${MAILPILE_DOMAIN_NAME}/mail/.previous ]; then
                    rm -rf /var/www/${MAILPILE_DOMAIN_NAME}/mail/.previous
                fi
                mv /var/www/${MAILPILE_DOMAIN_NAME}/mail/.previous /var/www/${MAILPILE_DOMAIN_NAME}/mail/.local
            fi
            backup_unmount_drive
            exit 3685
        fi
        rm -rf ${temp_restore_dir}
        chown -R mailpile: /var/www/$MAILPILE_DOMAIN_NAME/mail/

        if [ -d /etc/letsencrypt/live/${MAILPILE_DOMAIN_NAME} ]; then
            ln -s /etc/letsencrypt/live/${MAILPILE_DOMAIN_NAME}/privkey.pem /etc/ssl/private/${MAILPILE_DOMAIN_NAME}.key
            ln -s /etc/letsencrypt/live/${MAILPILE_DOMAIN_NAME}/fullchain.pem /etc/ssl/certs/${MAILPILE_DOMAIN_NAME}.pem
        fi

        systemctl start mailpile
    fi
}

function backup_remote_mailpile {
    if [ ! -f /etc/systemd/system/mailpile.service ]; then
        return
    fi
    MAILPILE_DOMAIN_NAME='mailpile.local'
    if grep -q "mailpile domain" $COMPLETION_FILE; then
        MAILPILE_DOMAIN_NAME=$(get_completion_param "mailpile domain")
    fi
    source_directory=/var/www/${MAILPILE_DOMAIN_NAME}/mail/.local
    if [ -d $source_directory ]; then
        systemctl stop mailpile

        function_check backup_directory_to_usb
        backup_directory_to_friend $source_directory mailpile

        systemctl start mailpile
    fi
}

function restore_remote_mailpile {
    if [ ! -f /etc/systemd/system/mailpile.service ]; then
        return
    fi
    MAILPILE_DOMAIN_NAME='mailpile.local'
    if grep -q "mailpile domain" $COMPLETION_FILE; then
        MAILPILE_DOMAIN_NAME=$(get_completion_param "mailpile domain")
    fi
    if [ $MAILPILE_DOMAIN_NAME ]; then
        systemctl stop mailpile

        temp_restore_dir=/root/tempmailpile
        restore_directory_from_friend $temp_restore_dir mailpile
        if [ -d /var/www/${MAILPILE_DOMAIN_NAME}/mail/.local ]; then
            mv /var/www/${MAILPILE_DOMAIN_NAME}/mail/.local /var/www/${MAILPILE_DOMAIN_NAME}/mail/.previous
        fi
        temp_source_dir=$(find ${temp_restore_dir} -name ".local")
        cp -r ${temp_source_dir} /var/www/${MAILPILE_DOMAIN_NAME}/mail/
        if [ ! "$?" = "0" ]; then
            if [ -d mv /var/www/${MAILPILE_DOMAIN_NAME}/mail/.previous ]; then
                mv /var/www/${MAILPILE_DOMAIN_NAME}/mail/.previous /var/www/${MAILPILE_DOMAIN_NAME}/mail/.local
            fi
            backup_unmount_drive
            exit 36732
        fi
        rm -rf ${temp_restore_dir}
        chown -R mailpile: /var/www/$MAILPILE_DOMAIN_NAME/mail/

        if [ -d /etc/letsencrypt/live/${MAILPILE_DOMAIN_NAME} ]; then
            ln -s /etc/letsencrypt/live/${MAILPILE_DOMAIN_NAME}/privkey.pem /etc/ssl/private/${MAILPILE_DOMAIN_NAME}.key
            ln -s /etc/letsencrypt/live/${MAILPILE_DOMAIN_NAME}/fullchain.pem /etc/ssl/certs/${MAILPILE_DOMAIN_NAME}.pem
        fi

        systemctl start mailpile
    fi
}

function remove_mailpile {
    if [ ${#MAILPILE_DOMAIN_NAME} -eq 0 ]; then
        return
    fi

    systemctl stop mailpile
    systemctl disable mailpile
    rm /etc/systemd/system/mailpile.service

    read_config_param "MAILPILE_DOMAIN_NAME"
    nginx_dissite $MAILPILE_DOMAIN_NAME
    # remove_certs ${MAILPILE_DOMAIN_NAME}
    if [ -f /etc/nginx/sites-available/$MAILPILE_DOMAIN_NAME ]; then
        rm -f /etc/nginx/sites-available/$MAILPILE_DOMAIN_NAME
    fi
    if [ -d /var/www/$MAILPILE_DOMAIN_NAME ]; then
        rm -rf /var/www/$MAILPILE_DOMAIN_NAME
    fi
    function_check remove_ddns_domain
    remove_ddns_domain $MAILPILE_DOMAIN_NAME
    deluser --remove-all-files mailpile

    remove_config_param MAILPILE_DOMAIN_NAME
    remove_config_param MAILPILE_CODE
    function_check remove_onion_service
    remove_onion_service mailpile ${MAILPILE_ONION_PORT}
    remove_completion_param "install_mailpile"

    enable_email_encryption_at_rest

    sed -i '/Mailpile/d' $COMPLETION_FILE
    sed -i '/mailpile/d' $COMPLETION_FILE
    sed -i '/mailpile/d' /home/$MY_USERNAME/README
    sed -i '/Mailpile/d' /home/$MY_USERNAME/README
}

function install_mailpile {
    if [ ! $ONION_ONLY ]; then
        ONION_ONLY='no'
    fi

    if [ ! $MAILPILE_DOMAIN_NAME ]; then
        echo $'The mailpile domain name was not specified'
        exit 63824
    fi

    apt-get -yq install python-pip python-lxml python-dev libjpeg-dev

    if [ ! -d /var/www/$MAILPILE_DOMAIN_NAME ]; then
        mkdir /var/www/$MAILPILE_DOMAIN_NAME
    fi

    cd /var/www/$MAILPILE_DOMAIN_NAME
    if [ -d /var/www/$MAILPILE_DOMAIN_NAME/mail ]; then
        rm -rf /var/www/$MAILPILE_DOMAIN_NAME/mail
    fi
    git_clone $MAILPILE_REPO mail
    cd mail
    git checkout $MAILPILE_COMMIT -b $MAILPILE_COMMIT
    set_completion_param "mailpile commit" "$MAILPILE_COMMIT"

    if [ ! -f requirements-dev.txt ]; then
        echo $'No python requirements file found'
        exit 62382
    fi
    pip install -r requirements.txt

    adduser --system --home=/var/www/$MAILPILE_DOMAIN_NAME/mail/ --group mailpile
    adduser mailpile debian-tor
    chown -R mailpile: /var/www/$MAILPILE_DOMAIN_NAME/mail/

    # create folders and tags
    su -c "cd /var/www/$MAILPILE_DOMAIN_NAME/mail && ./mp --setup" - mailpile

    echo '[Unit]' > /etc/systemd/system/mailpile.service
    echo 'Description=Mailpile Email Client' >> /etc/systemd/system/mailpile.service
    echo 'After=syslog.target network.target nginx.target' >> /etc/systemd/system/mailpile.service
    echo '' >> /etc/systemd/system/mailpile.service
    echo '[Service]' >> /etc/systemd/system/mailpile.service
    echo 'User=mailpile' >> /etc/systemd/system/mailpile.service
    echo 'Group=debian-tor' >> /etc/systemd/system/mailpile.service
    echo "WorkingDirectory=/var/www/$MAILPILE_DOMAIN_NAME/mail" >> /etc/systemd/system/mailpile.service
    echo "ExecStart=/var/www/$MAILPILE_DOMAIN_NAME/mail/mp --www=0.0.0.0:${MAILPILE_PORT} --wait" >> /etc/systemd/system/mailpile.service
    echo 'Restart=always' >> /etc/systemd/system/mailpile.service
    echo 'RestartSec=10' >> /etc/systemd/system/mailpile.service
    echo '' >> /etc/systemd/system/mailpile.service
    echo '[Install]' >> /etc/systemd/system/mailpile.service
    echo 'WantedBy=multi-user.target' >> /etc/systemd/system/mailpile.service
    chmod +x /etc/systemd/system/mailpile.service

    mailpile_nginx_site=/etc/nginx/sites-available/$MAILPILE_DOMAIN_NAME
    if [[ $ONION_ONLY == "no" ]]; then
        function_check nginx_http_redirect
        nginx_http_redirect $MAILPILE_DOMAIN_NAME
        echo 'server {' >> $mailpile_nginx_site
        echo '  listen 443 ssl;' >> $mailpile_nginx_site
        echo "  server_name $MAILPILE_DOMAIN_NAME;" >> $mailpile_nginx_site
        echo '' >> $mailpile_nginx_site
        echo '  # Security' >> $mailpile_nginx_site
        function_check nginx_ssl
        nginx_ssl $MAILPILE_DOMAIN_NAME

        function_check nginx_disable_sniffing
        nginx_disable_sniffing $MAILPILE_DOMAIN_NAME

        echo '  add_header Strict-Transport-Security max-age=15768000;' >> $mailpile_nginx_site
        echo '' >> $mailpile_nginx_site
        echo '  # Logs' >> $mailpile_nginx_site
        echo '  access_log /dev/null;' >> $mailpile_nginx_site
        echo '  error_log /dev/null;' >> $mailpile_nginx_site
        echo '' >> $mailpile_nginx_site
        echo '  # Root' >> $mailpile_nginx_site
        echo "  root /var/www/$MAILPILE_DOMAIN_NAME/mail;" >> $mailpile_nginx_site
        echo '' >> $mailpile_nginx_site
        echo '  location / {' >> $mailpile_nginx_site
        function_check nginx_limits
        nginx_limits $MAILPILE_DOMAIN_NAME '15m'
        echo "    proxy_pass        http://localhost:${MAILPILE_PORT}/;" >> $mailpile_nginx_site
        echo '    proxy_set_header X-Forwarded-Host $host;' >> $mailpile_nginx_site
        echo '    proxy_set_header X-Forwarded-Server $host;' >> $mailpile_nginx_site
        echo '    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;' >> $mailpile_nginx_site
        echo '  }' >> $mailpile_nginx_site
        echo '' >> $mailpile_nginx_site
        nginx_keybase ${MAILPILE_DOMAIN_NAME}
        echo '}' >> $mailpile_nginx_site
    else
        echo -n '' > $mailpile_nginx_site
    fi
    echo 'server {' >> $mailpile_nginx_site
    echo "    listen 127.0.0.1:$MAILPILE_ONION_PORT default_server;" >> $mailpile_nginx_site
    echo "    server_name $MAILPILE_DOMAIN_NAME;" >> $mailpile_nginx_site
    echo '' >> $mailpile_nginx_site
    function_check nginx_disable_sniffing
    nginx_disable_sniffing $MAILPILE_DOMAIN_NAME
    echo '' >> $mailpile_nginx_site
    echo '  # Logs' >> $mailpile_nginx_site
    echo '  access_log /dev/null;' >> $mailpile_nginx_site
    echo '  error_log /dev/null;' >> $mailpile_nginx_site
    echo '' >> $mailpile_nginx_site
    echo '  # Root' >> $mailpile_nginx_site
    echo "  root /var/www/$MAILPILE_DOMAIN_NAME/mail;" >> $mailpile_nginx_site
    echo '' >> $mailpile_nginx_site
    echo '  location / {' >> $mailpile_nginx_site
    function_check nginx_limits
    nginx_limits $MAILPILE_DOMAIN_NAME '15m'
    echo "    proxy_pass        http://localhost:${MAILPILE_PORT}/;" >> $mailpile_nginx_site
    echo '    proxy_set_header X-Forwarded-Host $host;' >> $mailpile_nginx_site
    echo '    proxy_set_header X-Forwarded-Server $host;' >> $mailpile_nginx_site
    echo '    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;' >> $mailpile_nginx_site
    echo '  }' >> $mailpile_nginx_site
    echo '' >> $mailpile_nginx_site
    nginx_keybase ${MAILPILE_DOMAIN_NAME}
    echo '}' >> $mailpile_nginx_site

    function_check create_site_certificate
    if [ ! -f /etc/ssl/certs/${MAILPILE_DOMAIN_NAME}.pem ]; then
        create_site_certificate $MAILPILE_DOMAIN_NAME 'yes'
    fi

    if [ -f /etc/ssl/certs/${MAILPILE_DOMAIN_NAME}.crt ]; then
        mv /etc/ssl/certs/${MAILPILE_DOMAIN_NAME}.crt /etc/ssl/certs/${MAILPILE_DOMAIN_NAME}.pem
    fi
    if [ -f /etc/ssl/certs/${MAILPILE_DOMAIN_NAME}.pem ]; then
        chown mailpile: /etc/ssl/certs/${MAILPILE_DOMAIN_NAME}.pem
        sed -i "s|.crt|.pem|g" /etc/nginx/sites-available/${MAILPILE_DOMAIN_NAME}
    fi
    if [ -f /etc/ssl/private/${MAILPILE_DOMAIN_NAME}.key ]; then
        chown mailpile: /etc/ssl/private/${MAILPILE_DOMAIN_NAME}.key
    fi

    function_check nginx_ensite
    nginx_ensite $MAILPILE_DOMAIN_NAME

    MAILPILE_ONION_HOSTNAME=$(add_onion_service mailpile 80 ${MAILPILE_ONION_PORT})

    if ! grep -q "Mailpile onion domain" /home/$MY_USERNAME/README; then
        echo $"Mailpile onion domain: ${MAILPILE_ONION_HOSTNAME}" >> /home/$MY_USERNAME/README
        echo '' >> /home/$MY_USERNAME/README
        chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/README
        chmod 600 /home/$MY_USERNAME/README
    else
        if [ -f /home/$MY_USERNAME/README ]; then
            sed -i "s|Mailpile onion domain.*|Mailpile onion domain: ${MAILPILE_ONION_HOSTNAME}|g" /home/$MY_USERNAME/README
        fi
    fi

    function_check add_ddns_domain
    add_ddns_domain $MAILPILE_DOMAIN_NAME

    disable_email_encryption_at_rest

    systemctl enable mailpile
    systemctl daemon-reload
    systemctl start mailpile
    systemctl restart nginx

    set_completion_param "mailpile domain" "$MAILPILE_DOMAIN_NAME"
    APP_INSTALLED=1
}

# NOTE: deliberately no exit 0