#!/bin/bash
set -eu
app=$YNH_APP_INSTANCE_NAME


# The main logic is to
# - install in a src-new folder
# - upgrade dependencies
# - if everything OK, rename src-new to src

# Installation paths
INSTALL_DIR=/opt/yunohost/ihatemoney
PIP=${INSTALL_DIR}/venv/bin/pip
NEW_REQUIREMENTS=${INSTALL_DIR}/src-new/requirements.txt

# Source YunoHost helpers
. /usr/share/yunohost/helpers

domain=$(ynh_app_setting_get "$app" domain)

# Source local utils
source _common.sh

# Optionaly upgrade arg to typed boolean form

is_public=$(ynh_app_setting_get "$app" is_public)

if [ $is_public = "No" ];
then
    is_public=0
else
    is_public=1
fi

ynh_app_setting_set "$app" is_public "$is_public"

function exit_properly () {
    set +e
    # Revert to the old venv
    if [ -e /opt/yunohost/ihatemoney/venv-old ]
    then
        sudo mv /opt/yunohost/ihatemoney/venv{-old,}
    fi
    # Remove downloaded code
    sudo rm -rf ${INSTALL_DIR}/src-new/
    ynh_die "Upgrade script failed, aborted and rolled back the installation"
}
trap exit_properly ERR


# Upgrade code
fetch_and_extract ${INSTALL_DIR}/src-new/ ihatemoney

fix_permissions ${INSTALL_DIR}/src-new/

# Upgrade dependencies
sudo ${PIP} install -r ${NEW_REQUIREMENTS}
sudo ${PIP} install 'gunicorn>=19.3.0' 'PyMySQL'

# Everything went ok ? Let's keep this code.
sudo rm -rf ${INSTALL_DIR}/src
sudo rm -rf ${INSTALL_DIR}/venv-old
sudo mv ${INSTALL_DIR}/src-new ${INSTALL_DIR}/src


## Migration from old versions of the package


if [ -e /etc/ihatemoney/settings.py ]; then
    # Strip out the no longer used part of the settings
    sudo python2 -c"d = open('/etc/ihatemoney/settings.py').read().replace('try:\n    from settings import *\nexcept ImportError:\n    pass\n', ''); open('/etc/ihatemoney/settings.py', 'w').write(d)"
    # Rename
    sudo mv /etc/ihatemoney/settings.py ${ihatemoney_conf_path}
fi

# Remove no longer used symlink
# (ihatemoney now read its conf by default from /etc/ihatemoney/ihatemoney.cfg)
sudo rm -f ${INSTALL_DIR}/src/budget/settings.py



# MIGRATION: Optionaly switch to a python3 venv

if [ ${INSTALL_DIR}/venv/bin/python -ef ${INSTALL_DIR}/venv/bin/python2 ]
then
    install_apt_dependencies
    # Trash py2 venv
    sudo mv ${INSTALL_DIR}/venv ${INSTALL_DIR}/venv-old
    init_virtualenv

    # Clears all cookie-sessions, because py2 & py3 sessions are incompatible
    # Relates https://github.com/lepture/flask-wtf/issues/279 (fix unreleased)
    new_secret_key=`openssl rand -base64 32`
    sudo sed -i "s/SECRET_KEY = \".*\"/SECRET_KEY = \"${new_secret_key}\"/g" /etc/ihatemoney/ihatemoney.cfg
fi



# MIGRATION: Switch Python-MySQL -> PyMySQL

# Python-MySQL is no longer maintained and does not support Py3
sudo sed -i "s@'mysql://@'mysql+pymysql://@g" ${ihatemoney_conf_path}



# Restart backend
sudo supervisorctl restart budget