#!/bin/bash

# variables
LABEL="DATA"
DATABASE_PASS=$(head -c 300 /dev/urandom | tr -cd 'a-zA-Z0-9' | head -c 16)
TLD="example.com"
HOST="git"
ORGNAME="git example"

# start
set -e

[ -e /01firstboot ] && exit 0
[ -e /02firstboot ] || exit 0

# Gitea configuration
if [ ! -L /etc/gitea/app.ini ]; then
    if [ ! -f "/$LABEL/etc/gitea/app.ini" ]; then
        echo 'Create Gitea config...'
        mkdir -p /$LABEL/etc/gitea
        cp /etc/gitea/app.ini /$LABEL/etc/gitea/app.ini
        mv /etc/gitea/app.ini /$LABEL/etc/gitea/app.ini.orig
        chown -R git:git /$LABEL/etc/gitea
        ln -s /$LABEL/etc/gitea/app.ini /etc/gitea/app.ini

        echo 'Configure Gitea...'
        sed -i 's#^HOST = 127.0.0.1:3306#HOST = /run/mysqld/mysqld.sock#' /$LABEL/etc/gitea/app.ini
        sed -i 's/^NAME = gitea/NAME = giteadb/' /$LABEL/etc/gitea/app.ini
        sed -i 's/^USER = root/USER = gitea/' /$LABEL/etc/gitea/app.ini
        sed -i 's/^LFS_JWT_SECRET.*=.*$/LFS_JWT_SECRET = '`gitea generate secret LFS_JWT_SECRET`'/g' /$LABEL/etc/gitea/app.ini
        sed -i 's/^INTERNAL_TOKEN.*=.*$/INTERNAL_TOKEN = '`gitea generate secret INTERNAL_TOKEN`'/g' /$LABEL/etc/gitea/app.ini
        sed -i 's/^SECRET_KEY.*=.*$/SECRET_KEY = '`gitea generate secret SECRET_KEY`'/g' /$LABEL/etc/gitea/app.ini
    else
        echo 'Linking Gitea config...'
        cp /$LABEL/etc/gitea/app.ini /$LABEL/etc/gitea/app.ini.alt
        rm -f /$LABEL/etc/gitea/app.ini.orig
        mv /etc/gitea/app.ini /$LABEL/etc/gitea/app.ini.orig
        chown -R git:git /$LABEL/etc/gitea
        ln -s /$LABEL/etc/gitea/app.ini /etc/gitea/app.ini
    fi
fi
if [ ! -d "/$LABEL/var/lib/gitea" ]; then
    mkdir -p /$LABEL/var/lib/gitea
    chown git:git /$LABEL/var/lib/gitea
    cp -a /var/lib/gitea/. /$LABEL/var/lib/gitea
fi
mv /var/lib/gitea /var/lib/gitea.orig
ln -s /$LABEL/var/lib/gitea /var/lib/gitea

# Database
if [ ! -L /var/lib/mysql ]; then
    systemctl stop mariadb
    if [ ! -d "/$LABEL/var/lib/mysql/giteadb" ]; then
        echo 'Initialize MariaDB...'
        mkdir -p "/$LABEL/var/lib"
        rm -rf "/$LABEL/var/lib/mysql"
        cp -a "/var/lib/mysql" "/$LABEL/var/lib/mysql"
        mv "/var/lib/mysql" "/$LABEL/var/lib/mysql.orig"
        ln -s "/$LABEL/var/lib/mysql" "/var/lib/mysql"
        systemctl start mariadb
        sleep 5

        echo 'Create Gitea database...'
        mysql -u root -e "CREATE USER 'gitea'@'localhost' IDENTIFIED BY '$DATABASE_PASS';"
        mysql -u root -e "CREATE DATABASE giteadb CHARACTER SET 'utf8mb4' COLLATE 'utf8mb4_unicode_ci';"
        mysql -u root -e "GRANT ALL PRIVILEGES ON giteadb.* TO 'gitea'@'localhost' IDENTIFIED by '$DATABASE_PASS';"
        mysql -u root -e "FLUSH PRIVILEGES;"
    else
        echo 'Start MariaDB...'
        rm -rf "/$LABEL/var/lib/mysql.orig"
        mv "/var/lib/mysql" "/$LABEL/var/lib/mysql.orig"
        ln -s "/$LABEL/var/lib/mysql" "/var/lib/mysql"
        systemctl start mariadb
        sleep 5
        mysql -u root -e "GRANT ALL PRIVILEGES ON giteadb.* TO 'gitea'@'localhost' IDENTIFIED by '$DATABASE_PASS';"
    fi
else
    echo 'Set new database password...'
    systemctl restart mariadb
    sleep 5
    mysql -u root -e "GRANT ALL PRIVILEGES ON giteadb.* TO 'gitea'@'localhost' IDENTIFIED by '$DATABASE_PASS';"
fi

# update Gitea config with new database password
sed -i "s/.*PASSWD = .*;Use PASSWD =/PASSWD = $DATABASE_PASS ;Use PASSWD =/" /$LABEL/etc/gitea/app.ini

# Certificate
if [ -x "/$LABEL/etc/ssl/cert-renew.sh" ]; then
    # angepaßtes Zertifikat vorhanden (kein example)
    if [ ! -L /etc/ssl/cert-renew.sh ]; then
        rm -f "/$LABEL/etc/ssl/cert-renew.sh.orig"
        mv "/etc/ssl/cert-renew.sh" "/$LABEL/etc/ssl/cert-renew.sh.orig"
    else
        rm -f "/etc/ssl/cert-renew.sh"
    fi
    ln -s "/$LABEL/etc/ssl/cert-renew.sh" "/etc/ssl/cert-renew.sh"
else
    echo 'Create example certificate...'
    mkdir -p "/$LABEL/CERTS/KEYS/"
    mkdir -p "/$LABEL/CERTS/$HOST.$TLD"
    echo "FQDN = $HOST.$TLD" > "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD.cnf"
    echo "ORGNAME = $ORGNAME" >> "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD.cnf"
    echo "ALTNAMES = DNS:$HOST.$TLD , DNS:$TLD" >> "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD.cnf"
    echo -e "\n[ req ]\ndefault_bits = 4096\ndefault_md = sha256\nprompt = no\nencrypt_key = no\ndistinguished_name = dn\nreq_extensions = req_ext\ndefault_keyfile = ../KEYS/\$FQDN-key.pem\n" >> "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD.cnf"
    echo -e "\n[ dn ]\nC = DE\nO = \$ORGNAME\nCN = \$FQDN\n" >> "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD.cnf"
    echo -e "\n[ req_ext ]\nsubjectAltName = \$ALTNAMES" >> "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD.cnf"
    openssl req -x509 -new -config "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD.cnf" -out "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD-cert.pem" -keyout "/$LABEL/CERTS/KEYS/$HOST.$TLD-key.pem"
    cp "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD-cert.pem" "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD-fullchain.pem"
    touch "/$LABEL/CERTS/$HOST.$TLD/$HOST.$TLD-chain.pem"
fi

rm -rf /etc/ssl/apache2
mkdir -p /etc/ssl
ln -sf "/$LABEL/etc/ssl/apache2" "/etc/ssl/apache2"

/etc/ssl/cert-renew.sh

echo
echo "Success!"
echo "Do not forget to upgrade the MySQL database:"
echo "   # mysql_upgrade"
echo

systemctl enable mariadb
systemctl enable apache2
systemctl enable gitea

systemctl restart gitea
systemctl restart apache2

rm /02firstboot