#!/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

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
config_path=$(ynh_app_setting_get --app=$app --key=config_path)
port=$(ynh_app_setting_get --app=$app --key=port)

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

upgrade_type=$(ynh_check_app_version_changed)

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

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

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

#=================================================
# 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 () {
	ynh_clean_check_starting
	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# CHECK THE PATH
#=================================================

# Normalize the URL path syntax
path_url=$(ynh_normalize_url_path $path_url)

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

ynh_systemd_action --service_name=$app --action="stop" --log_path="systemd"

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

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

	ynh_secure_remove --file=$final_path

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

#=================================================
# COPY A CONFIG FILE
#=================================================

# Main config File
ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="../conf/config.js"

cp -a ../conf/config.js "$config_path"

#=================================================
# UPGRADE NODEJS AND YARN
#=================================================
ynh_script_progression --message="Upgrading dependencies..."

# Install Nodejs
ynh_exec_warn_less ynh_install_nodejs --nodejs_version=$nodejs_version

# Install Yarn
ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"

#=================================================
# UPGRADE THE LOUNGE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	pushd $final_path

	yarn install && ynh_exec_warn_less NODE_ENV=production yarn build

	popd
fi

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

# Create a dedicated nginx config
ynh_add_nginx_config

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

# Create a system user
ynh_system_user_create --username=$app

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..."

ynh_replace_string --match_string="__APP__"       --replace_string="$app"         --target_file="../conf/systemd.service"
ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path"  --target_file="../conf/systemd.service"
ynh_replace_string --match_string="__ENV_PATH__"  --replace_string="$PATH"        --target_file="../conf/systemd.service"
ynh_replace_string --match_string="__NODE__"      --replace_string="$nodejs_path" --target_file="../conf/systemd.service"

ynh_add_systemd_config

yunohost service add $app --description "Self-hosted web IRC client" --log "/var/log/$app/$app.log"

#=================================================
# 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="$config_path/config.js"

# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file="$config_path/config.js"

cp -a ../conf/config.js "$config_path"

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

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

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

# Set right permissions for curl installation
chown -R $app: $final_path
chown -R $app: $config_path

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

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Available at http"

#=================================================
# 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" --last