#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --time --weight=1

export app=$YNH_APP_INSTANCE_NAME

export domain=$(ynh_app_setting_get --app=$app --key=domain)
export path_url=$(ynh_app_setting_get --app=$app --key=path)
export admin=$(ynh_app_setting_get --app=$app --key=admin)
export email=$(ynh_app_setting_get --app=$app --key=email)
export isp_name=$(ynh_app_setting_get --app=$app --key=isp_name)
export isp_site=$(ynh_app_setting_get --app=$app --key=isp_site)
export secret=$(ynh_app_setting_get --app=$app --key=secret)
export is_public=$(ynh_app_setting_get --app=$app --key=is_public)
export final_path=$(ynh_app_setting_get --app=$app --key=final_path)
export db_name=$(ynh_app_setting_get --app=$app --key=db_name)

#=================================================
# CHECK VERSION
#=================================================

### This helper will compare the version of the currently installed app and the version of the upstream package.
### $upgrade_type can have 2 different values
### - UPGRADE_APP if the upstream app version has changed
### - UPGRADE_PACKAGE if only the YunoHost package has changed
### ynh_check_app_version_changed will stop the upgrade if the app is up to date.
### UPGRADE_APP should be used to upgrade the core app only if there's an upgrade to do.
upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --time --weight=1

# Fix is_public as a boolean value
if [ "$is_public" = "Yes" ]; then
	ynh_app_setting_set --app=$app --key=is_public --value=1
	is_public=1
elif [ "$is_public" = "No" ]; then
	ynh_app_setting_set --app=$app --key=is_public --value=0
	is_public=0
fi

# If db_name doesn't exist, create it
if [ -z "$db_name" ]; then
	db_name=$(ynh_sanitize_dbid --db_name=$app)
	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
fi

# If final_path doesn't exist, create it
if [ -z "$final_path" ]; then
	final_path=/opt/$app
	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --time --weight=1

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --time --weight=1

ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --time --weight=1

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"
fi

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading nginx web server configuration..." --time --weight=1

# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --time --weight=1

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --time --weight=1

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app

#=================================================
# SPECIFIC UPGRADE
#=================================================
# CONFIGURATION DJANGO
#=================================================

export prefix="${path_url#"/"}/"
prefix=${prefix%"/"}
ynh_backup_if_checksum_is_different --file="$final_path/app/settings_local.py"
ynh_render_template ../conf/local.py.j2 "$final_path/app/setings_local.py"
ynh_store_file_checksum --file="$final_path/app/settings_local.py"

virtualenv "$final_path/venv"
(
	set +o nounset
	source "${final_path}/venv/bin/activate"
	set -o nounset
    
    #=================================================
    # PYTHON DEPENDENCIES
    #=================================================
    echo "django-auth-ldap<1.4" >> $final_path/requirements.txt
    $final_path/venv/bin/pip install -r $final_path/requirements.txt
    
    #=================================================
    # MIGRATE DB
    #=================================================
    $final_path/venv/bin/python manage.py migrate --noinput
    
    #=================================================
    # COLLECT FILES
    #=================================================
    $final_path/venv/bin/python manage.py collectstatic --noinput
)

#=================================================

#================================================
# UPDATE GUNICORN
#================================================
ynh_backup_if_checksum_is_different --file="$final_path/gunicorn_config.py"
ynh_replace_string --match_string="__YNH_APP_INSTANCE_NAME__" --replace_string="$app" --target_file="../conf/gunicorn_config.py"
cp -f ../conf/gunicorn_config.py $final_path/
ynh_store_file_checksum --file="$final_path/gunicorn_config.py"

chown $app:www-data $final_path/gunicorn_config.py

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --time --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

# Set permissions on app files
chown -R root: $final_path

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Upgrading SSOwat configuration..." --time --weight=1

# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# unprotected_uris allows SSO credentials to be passed anyway
	ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"
fi

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --time --weight=1

ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading nginx web server..." --time --weight=1

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Upgrade of $app completed" --time --last