#!/bin/bash
set -euo pipefail

function log {
    echo '[Entrypoint]' $*
}

######################################################################
# Generate server.xml for Tomcat.  We lower-case these vars to be
# compatible with the Ansible templates in
# https://bitbucket.org/atlassian/dc-deployments-automation

# Previous names for parameters, preserved for backwards compatability
: ${CATALINA_CONNECTOR_PROXYNAME:=}
: ${CATALINA_CONNECTOR_PROXYPORT:=}
: ${CATALINA_CONNECTOR_SCHEME:=http}
: ${CATALINA_CONNECTOR_SECURE:=false}
: ${CATALINA_CONTEXT_PATH:=}

: ${CATALINA_OPTS:=}
export CATALINA_OPTS

# Use new var name, or previous var name, or default...
export atl_proxy_name=${ATL_PROXY_NAME:=$CATALINA_CONNECTOR_PROXYNAME}
export atl_proxy_port=${ATL_PROXY_PORT:=$CATALINA_CONNECTOR_PROXYPORT}
export atl_tomcat_secure=${ATL_TOMCAT_SECURE:=$CATALINA_CONNECTOR_SECURE}
export atl_tomcat_scheme=${ATL_TOMCAT_SCHEME:=$CATALINA_CONNECTOR_SCHEME}
export atl_tomcat_contextpath=${ATL_TOMCAT_CONTEXTPATH:=$CATALINA_CONTEXT_PATH}

export atl_tomcat_port=${ATL_TOMCAT_PORT:=8090}
export atl_tomcat_mgmt_port=${ATL_TOMCAT_MGMT_PORT:=8000}
export atl_tomcat_maxthreads=${ATL_TOMCAT_MAXTHREADS:=200}
export atl_tomcat_minsparethreads=${ATL_TOMCAT_MINSPARETHREADS:=10}
export atl_tomcat_connectiontimeout=${ATL_TOMCAT_CONNECTIONTIMEOUT:=20000}
export atl_tomcat_enablelookups=${ATL_TOMCAT_ENABLELOOKUPS:=false}
export atl_tomcat_protocol=${ATL_TOMCAT_PROTOCOL:=HTTP/1.1}
export atl_tomcat_redirectport=${ATL_TOMCAT_REDIRECTPORT:=8443}
export atl_tomcat_acceptcount=${ATL_TOMCAT_ACCEPTCOUNT:=10}

log "Generating ${CONFLUENCE_INSTALL_DIR}/conf/server.xml"
/opt/atlassian/bin/templater.sh \
    /opt/atlassian/etc/server.xml.j2 \
    > ${CONFLUENCE_INSTALL_DIR}/conf/server.xml

######################################################################
# Confluence config files

log "Generating ${CONFLUENCE_HOME}/confluence.cfg.xml"

/opt/atlassian/bin/templater.sh \
    /opt/atlassian/etc/confluence.cfg.head.xml.j2 \
    > ${CONFLUENCE_HOME}/confluence.cfg.xml

: ${ATL_JDBC_URL:=}
if [[ ! -z "$ATL_JDBC_URL" ]]; then
    declare -A databases=(
        ["mysql-driver"]="com.mysql.jdbc.Driver"
        ["mysql-dialect"]="com.atlassian.confluence.impl.hibernate.dialect.MySQLDialect"
        ["postgresql-driver"]="org.postgresql.Driver"
        ["postgresql-dialect"]="com.atlassian.confluence.impl.hibernate.dialect.PostgreSQLDialect"
        ["mssql-driver"]="com.microsoft.sqlserver.jdbc.SQLServerDriver"
        ["mssql-dialect"]="com.atlassian.confluence.impl.hibernate.dialect.SQLServerDialect"
        ["oracle12c-driver"]="oracle.jdbc.driver.OracleDriver"
        ["oracle12c-dialect"]="com.atlassian.confluence.impl.hibernate.dialect.OracleDialect"
    )

    # Must be supplied
    export atl_jdbc_url=${ATL_JDBC_URL}
    export atl_jdbc_user=${ATL_JDBC_USER}
    export atl_jdbc_password=${ATL_JDBC_PASSWORD}
    export atl_db_choice=${ATL_DB_TYPE}

    export atl_db_driver=${databases[${atl_db_choice}"-driver"]}
    export atl_db_dialect=${databases[${atl_db_choice}"-dialect"]}

    # Defaults, can be overridden
    export atl_db_poolmaxsize=${ATL_DB_POOLMAXSIZE:=100}
    export atl_db_poolminsize=${ATL_DB_POOLMINSIZE:=20}
    export atl_db_timeout=${ATL_DB_TIMEOUT:=30}
    export atl_db_idletestperiod=${ATL_DB_IDLETESTPERIOD:=100}
    export atl_db_maxstatements=${ATL_DB_MAXSTATEMENTS:=0}
    export atl_db_validate=${ATL_DB_VALIDATE:=false}
    export atl_db_acquireincrement=${ATL_DB_ACQUIREINCREMENT:=1}
    export atl_db_validationquery=${ATL_DB_VALIDATIONQUERY:=select 1}

    /opt/atlassian/bin/templater.sh \
        /opt/atlassian/etc/confluence.cfg.db.xml.j2 \
        >> ${CONFLUENCE_HOME}/confluence.cfg.xml

fi

/opt/atlassian/bin/templater.sh \
    /opt/atlassian/etc/confluence.cfg.tail.xml.j2 \
    >> ${CONFLUENCE_HOME}/confluence.cfg.xml
chown ${RUN_USER}.${RUN_GROUP} ${CONFLUENCE_HOME}/confluence.cfg.xml
chmod 0640 ${CONFLUENCE_HOME}/confluence.cfg.xml


# The default is two weeks, in seconds, same as the seraph default.
export atl_autologin_cookie_age=${ATL_AUTOLOGIN_COOKIE_AGE:=1209600}

log "Generating ${CONFLUENCE_INSTALL_DIR}/confluence/WEB-INF/classes/seraph-config.xml"
/opt/atlassian/bin/templater.sh \
    /opt/atlassian/etc/seraph-config.xml.j2 \
    > ${CONFLUENCE_INSTALL_DIR}/confluence/WEB-INF/classes/seraph-config.xml


export atl_product_home=${CONFLUENCE_HOME}

log "Generating ${CONFLUENCE_INSTALL_DIR}/confluence/WEB-INF/classes/confluence-init.properties"
/opt/atlassian/bin/templater.sh \
    /opt/atlassian/etc/confluence-init.properties.j2 \
    > ${CONFLUENCE_INSTALL_DIR}/confluence/WEB-INF/classes/confluence-init.properties


# Start Confluence as the correct user
if [ "${UID}" -eq 0 ]; then
    echo "User is currently root. Will change directory ownership to ${RUN_USER}:${RUN_GROUP}, then downgrade permission to ${RUN_USER}"
    PERMISSIONS_SIGNATURE=$(stat -c "%u:%U:%a" "${CONFLUENCE_HOME}")
    EXPECTED_PERMISSIONS=$(id -u ${RUN_USER}):${RUN_USER}:700
    if [ "${PERMISSIONS_SIGNATURE}" != "${EXPECTED_PERMISSIONS}" ]; then
        chmod -R 700 "${CONFLUENCE_HOME}" &&
            chown -R "${RUN_USER}:${RUN_GROUP}" "${CONFLUENCE_HOME}"
    fi
    # Now drop privileges
    exec su -s /bin/bash "${RUN_USER}" -c "$CONFLUENCE_INSTALL_DIR/bin/start-confluence.sh $@"
else
    exec "$CONFLUENCE_INSTALL_DIR/bin/start-confluence.sh" "$@"
fi