#!/bin/bash

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

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

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

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)

#=================================================
# 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..." --weight=1

if ! [ -f $final_path/conf/ignore_alert.csv ]; then
    echo "method level server message target" > $final_path/conf/ignore_alert.csv
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --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
#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

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

# Create a dedicated nginx config
# Note: i don't use the helper because i need this file to be named "000-"
finalnginxconf="/etc/nginx/conf.d/$domain.d/000-$app.conf"
ynh_backup_if_checksum_is_different --file="$finalnginxconf"
cp ../conf/nginx.conf "$finalnginxconf"
ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path" --target_file="$finalnginxconf"
ynh_store_file_checksum --file="$finalnginxconf"
ynh_systemd_action --service_name=nginx --action=reload

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

ynh_install_app_dependencies $pkg_dependencies

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

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

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

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================

### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.
ynh_backup_if_checksum_is_different --file="$final_path/conf/$app.yml"
# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file="$final_path/conf/$app.yml"

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

# Set permissions on app files
chown -R root: $final_path
chown $app:$app $final_path/yunomonitor.py
chmod u+x $final_path/yunomonitor.py

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring SSOwat..." --weight=1

ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"

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

ynh_systemd_action --service_name=nginx --action=reload

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

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

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

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