#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# synapse matrix server
#
# 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 chat'

IN_DEFAULT_INSTALL=0
SHOW_ON_ABOUT=1

SYNAPSE_PORT=8448
SYNAPSE_PASSWORD=
SYNAPSE_DIR=/etc/matrix-synapse

synapse_variables=(ONION_ONLY
                   MY_USERNAME
                   SYNAPSE_PASSWORD
                   DEFAULT_DOMAIN_NAME)

function can_install_synapse {
    check_architecture=$(uname -a)
    if [[ "$check_architecture" == *"amd64"* || "$check_architecture" == *"i386"* ]]; then
        echo "1"
    else
        echo "0"
    fi
}

function remove_user_synapse {
    remove_username="$1"
    # TODO
}

function add_user_synapse {
    new_username="$1"
    new_user_password="$2"

    cd $SYNAPSE_DIR
    register_new_matrix_user -c homeserver.yaml https://localhost:${SYNAPSE_PORT} -u "${new_username}" -p "${new_user_password}" -a
    echo '0'
}

function install_interactive_synapse {
    echo -n ''
    APP_INSTALLED=1
}

function change_password_synapse {
    echo -n ''
}

function reconfigure_synapse {
    echo -n ''
}

function upgrade_synapse {
    echo -n ''
}

function backup_local_synapse {
    source_directory=$SYNAPSE_DIR
    if [ -d $source_directory ]; then
        systemctl stop synapse
        function_check backup_directory_to_usb
        backup_directory_to_usb $source_directory synapse
        systemctl start synapse
    fi
}

function restore_local_synapse {
    if [ -d $SYNAPSE_DIR ]; then
        systemctl stop synapse

        temp_restore_dir=/root/tempsynapse
        function_check restore_directory_from_usb
        restore_directory_from_usb $temp_restore_dir synapse
        cp -r $temp_restore_dir$SYNAPSE_DIR/* $SYNAPSE_DIR
        if [ ! "$?" = "0" ]; then
            function_check backup_unmount_drive
            backup_unmount_drive
            exit 725
        fi
        rm -rf $temp_restore_dir
        chown -R synapse:synapse $SYNAPSE_DIR

        systemctl start synapse
    fi
}

function backup_remote_synapse {
    source_directory=$SYNAPSE_DIR
    if [ -d $source_directory ]; then
        systemctl stop synapse
        function_check backup_directory_to_friend
        backup_directory_to_friend $source_directory synapse
        systemctl start synapse
    fi
}

function restore_remote_synapse {
    if [ -d $SYNAPSE_DIR ]; then
        systemctl stop synapse

        temp_restore_dir=/root/tempsynapse
        function_check restore_directory_from_friend
        restore_directory_from_friend $temp_restore_dir synapse
        cp -r $temp_restore_dir$SYNAPSE_DIR/* $SYNAPSE_DIR
        if [ ! "$?" = "0" ]; then
            exit 725
        fi
        rm -rf $temp_restore_dir
        chown -R synapse:synapse $SYNAPSE_DIR

        systemctl start synapse
    fi
}

function remove_synapse {
    systemctl stop matrix-synapse
    firewall_remove ${SYNAPSE_PORT}
    rm -rf $SYNAPSE_DIR
    apt-get -yq remove --purge matrix-synapse
    apt-get -yq autoremove

    rm /etc/apt/sources.list.d/synapse.list
    apt-get update

    remove_completion_param install_synapse
    sed -i '/synapse/d' $COMPLETION_FILE
    sed -i '/Synapse/d' /home/$MY_USERNAME/README
}

function install_synapse {
    if [[ "$(can_install_synapse)" == "0" ]]; then
        echo $'Matrix/Synapse can only be installed on i386 or amd64 architectures'
        exit 36734
    fi

    if [[ ${ONION_ONLY} == 'no' ]]; then
        # obtain a cert for the default domain
        if [[ "$(cert_exists ${DEFAULT_DOMAIN_NAME} pem)" == "0" ]]; then
            echo $'Obtaining certificate for the main domain'
            create_site_certificate ${DEFAULT_DOMAIN_NAME} 'yes'
        fi
    fi

    if [ ! -d /etc/prosody ]; then
        echo $'xmpp should be installed first'
        exit 67382
    fi

    apt-get -yq install build-essential python2.7-dev libffi-dev \
            python-pip python-setuptools sqlite3 \
            libssl-dev libjpeg-dev libxslt1-dev python-virtualenv curl

    curl -s https://matrix.org/packages/debian/repo-key.asc | apt-key add -
    echo "deb https://matrix.org/packages/debian/ ${DEBIAN_VERSION} main" | tee /etc/apt/sources.list.d/synapse.list
    apt-get update
    apt-get -yq install python-cffi
    apt-get -yq install python-nacl
    apt-get -yq install python-signedjson

    debconf-set-selections <<< "matrix-synapse matrix-synapse/server-name string $DEFAULT_DOMAIN_NAME"
    debconf-set-selections <<< "matrix-synapse matrix-synapse/server_name string $DEFAULT_DOMAIN_NAME"
    debconf-set-selections <<< "matrix-synapse matrix-synapse/report-stats boolean false"
    apt-get -yq install matrix-synapse
    if [ ! -d /etc/matrix-synapse ]; then
        exit 653835
    fi
    systemctl stop matrix-synapse
    systemctl start matrix-synapse

    firewall_add synapse ${SYNAPSE_PORT}

    SYNAPSE_ONION_HOSTNAME=$(add_onion_service synapse ${SYNAPSE_PORT} ${SYNAPSE_PORT})
    if ! grep -q "Synapse onion domain" /home/$MY_USERNAME/README; then
        echo $"Synapse onion domain: ${SYNAPSE_ONION_HOSTNAME}" >> /home/$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|Synapse onion domain.*|Synapse onion domain: ${SYNAPSE_ONION_HOSTNAME}|g" /home/$MY_USERNAME/README
        fi
    fi

    if [ ! ${SYNAPSE_PASSWORD} ]; then
        if [ -f ${IMAGE_PASSWORD_FILE} ]; then
            SYNAPSE_PASSWORD="$(printf `cat $IMAGE_PASSWORD_FILE`)"
        else
            SYNAPSE_PASSWORD="$(create_password ${MINIMUM_PASSWORD_LENGTH})"
        fi
    fi

    add_user_synapse "${MY_USERNAME}" "${SYNAPSE_PASSWORD}"

    if ! grep -q $"Synapse administrator" /home/${MY_USERNAME}/README; then
        echo '' >> /home/${MY_USERNAME}/README
        echo $'# Synapse' >> /home/${MY_USERNAME}/README
        echo $"Synapse administrator nickname: $MY_USERNAME" >> /home/${MY_USERNAME}/README
        echo $"Synapse administrator password: $SYNAPSE_PASSWORD" >> /home/${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|Synapse administrator password.*|Synapse administrator password: $SYNAPSE_PASSWORD|g" /home/${MY_USERNAME}/README
        fi
    fi

    APP_INSTALLED=1
}

# NOTE: deliberately no exit 0