#!/bin/bash

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

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

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

app=$YNH_APP_INSTANCE_NAME

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

domain=$(ynh_app_setting_get --app=$app --key=domain)
port=$(ynh_app_setting_get --app=$app --key=port)
path_url=$(ynh_app_setting_get --app=$app --key=path_url)

db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$(ynh_app_setting_get --app=$app --key=db_user)
db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)

registration_open=$(ynh_app_setting_get --app=$app --key=registration_open)
registration_approval=$(ynh_app_setting_get --app=$app --key=registration_approval)
registration_reason=$(ynh_app_setting_get --app=$app --key=registration_reason)

datadir=$(ynh_app_setting_get --app=$app --key=datadir)

#=================================================
# 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)

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

# 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..."

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

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

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

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

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

	# detect_arch comes from _common.sh / personnal helpers
	architecture=$detect_arch

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

# FIXME: this should be managed by the core in the future
# Here, as a packager, you may have to tweak the ownerhsip/permissions
# such that the appropriate users (e.g. maybe www-data) can access
# files in some cases.
# But FOR THE LOVE OF GOD, do not allow r/x for "others" on the entire folder -
# this will be treated as a security issue.
chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..."

# Create a dedicated NGINX config
ynh_add_nginx_config

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

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# SPECIFIC UPGRADE
#=================================================
# ...
#=================================================

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..."

### Same as during install
###
### The file will automatically be backed-up if it's found to be manually modified (because
### ynh_add_config keeps track of the file's checksum)

ynh_add_config --template="config.yaml" --destination="$final_path/config.yaml"

# FIXME: this should be handled by the core in the future
# You may need to use chmod 600 instead of 400,
# for example if the app is expected to be able to modify its own config
chmod 400 "$final_path/config.yaml"
chown $app:$app "$final_path/config.yaml"

### For more complex cases where you want to replace stuff using regexes,
### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
### When doing so, you also need to manually call ynh_store_file_checksum
###
### ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$final_path/some_config_file"
### ynh_store_file_checksum --file="$final_path/some_config_file"

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

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..."

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..."

yunohost service add $app --description="Gotosocial server" --log="/var/log/$app/$app.log"

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

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..."

ynh_systemd_action --service_name=nginx --action=reload

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

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