#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Command to upgrade the system

# License
# =======
#
# Copyright (C) 2015-2016 Bob Mottram <bob@robotics.uk.to>
#
# 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/>.

PROJECT_NAME='freedombone'

PROJECT_DIR="/root/${PROJECT_NAME}"

# An optional configuration file which overrides some of these variables
CONFIGURATION_FILE="/root/${PROJECT_NAME}.cfg"

PROJECT_REPO="https://github.com/bashrc/${PROJECT_NAME}"

FRIENDS_MIRRORS_SERVER=
FRIENDS_MIRRORS_SSH_PORT=2222
FRIENDS_MIRRORS_PASSWORD=
MY_MIRRORS_PASSWORD=

function read_repo_servers {
    if [ -f $CONFIGURATION_FILE ]; then
        if grep -q "FRIENDS_MIRRORS_SERVER" $CONFIGURATION_FILE; then
            FRIENDS_MIRRORS_SERVER=$(grep "FRIENDS_MIRRORS_SERVER" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
        fi
        if grep -q "FRIENDS_MIRRORS_SSH_PORT" $CONFIGURATION_FILE; then
            FRIENDS_MIRRORS_SSH_PORT=$(grep "FRIENDS_MIRRORS_SSH_PORT" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
        fi
        if grep -q "MY_MIRRORS_PASSWORD" $CONFIGURATION_FILE; then
            MY_MIRRORS_PASSWORD=$(grep "MY_MIRRORS_PASSWORD" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
        fi
        if grep -q "FRIENDS_MIRRORS_PASSWORD" $CONFIGURATION_FILE; then
            FRIENDS_MIRRORS_PASSWORD=$(grep "FRIENDS_MIRRORS_PASSWORD" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
        fi
    fi

    if [ ! $FRIENDS_MIRRORS_SERVER ]; then
        return
    fi
    if [ ${#FRIENDS_MIRRORS_SERVER} -lt 2 ]; then
        return
    fi

    MAIN_COMMAND=/usr/local/bin/${PROJECT_NAME}
    if [ ! -f $MAIN_COMMAND ]; then
        MAIN_COMMAND=/usr/bin/${PROJECT_NAME}
    fi

    REPOS=($(cat ${MAIN_COMMAND} | grep "_REPO=\"" | uniq -u | sed 's|${PROJECT_NAME}|'"${PROJECT_NAME}"'|g'))

    for line in "${REPOS[@]}"
    do
        repo_name=$(echo "$line" | awk -F '=' '{print $1}')
        mirrors_name=$(echo "$repo_name" | sed "s|_REPO||g" | awk '{print tolower($0)}')
        friends_repo_url="ssh://mirrors@${FRIENDS_MIRRORS_SERVER}:${FRIENDS_MIRRORS_SSH_PORT}/home/mirrors/${mirrors_name}"
        ${repo_name}="${friends_repo_url}"
    done
}

function git_clone {
    repo_url="$1"
    destination_dir="$2"
    if [[ "$repo_url" == "ssh:"* ]]; then
        if [ "${FRIENDS_MIRRORS_SERVER}" ]; then
            if [ ${#FRIENDS_MIRRORS_SERVER} -gt 2 ]; then
                if [ "$FRIENDS_MIRRORS_PASSWORD" ]; then
                    if [ ${#FRIENDS_MIRRORS_PASSWORD} -gt 2 ]; then
                        sshpass -p "$FRIENDS_MIRRORS_PASSWORD" git clone "$repo_url" "$destination_dir"
                        return
                    fi
                fi
            fi
        fi
    fi
    git clone "$repo_url" "$destination_dir"
}

function git_pull {
    if [ ! $1 ]; then
        echo $'git_pull no repo specified'
    fi

    git stash
    git remote set-url origin $1
    git checkout master
    if [ "${FRIENDS_MIRRORS_SERVER}" ]; then
        if [ ${#FRIENDS_MIRRORS_SERVER} -gt 2 ]; then
            if [ "$FRIENDS_MIRRORS_PASSWORD" ]; then
                if [ ${#FRIENDS_MIRRORS_PASSWORD} -gt 2 ]; then
                    sshpass -p "$FRIENDS_MIRRORS_PASSWORD" git pull
                    if [ $2 ]; then
                        git checkout $2 -b $2
                    fi
                    return
                fi
            fi
        fi
    fi
    git pull

    if [ $2 ]; then
        git checkout $2 -b $2
    fi
}

if [ -f $CONFIGURATION_FILE ]; then
    # read the location of the main project repo
    if grep -q "PROJECT_REPO" $CONFIGURATION_FILE; then
        PROJECT_REPO=$(grep "PROJECT_REPO" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
    fi
fi

update-ca-certificates

read_repo_servers
${PROJECT_NAME}-mirrors

if [ ! -d $PROJECT_DIR ]; then
    git_clone $PROJECT_REPO $PROJECT_DIR
fi

if [ -d $PROJECT_DIR ]; then
    if [ -f $CONFIGURATION_FILE ]; then
        cd $PROJECT_DIR
        git_pull $PROJECT_REPO
        make install
        ${PROJECT_NAME} -c $CONFIGURATION_FILE
    fi
fi

echo '

' | reset-tripwire

# deliberately there is no 'exit 0' here