#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_print_info --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)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
port=$(ynh_app_setting_get --app=$app --key=port)

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

upgrade_type=$(ynh_check_app_version_changed)

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

# 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

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

abort_if_up_to_date
# previous function is what defines 'version', more precisely the 'previous version'
previous_version="${version}"

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_print_info --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

#=================================================
# MANAGE UPGRADE
#=================================================
ynh_print_info --message="Ensuring downward compatibility..."

if ynh_version_gt "0.45-2" "${previous_version}" ; then
    ynh_replace_string --match_string="Environment=ROOT_URL=http://127.0.0.1:$port$path_url" --replace_string="Environment=ROOT_URL=https://$domain$path_url/" --target_file="/etc/systemd/system/$app.service"
    systemctl daemon-reload
fi

if ynh_version_gt "0.45-3" "${previous_version}" ; then
    yunohost service add $app
fi

if ynh_version_gt "0.77-2" "${previous_version}" ; then
    ynh_install_nodejs --nodejs_version="8.9.3"
    # Create a dedicated systemd config
    ynh_replace_string --match_string="__NODEJS__" --replace_string="$nodejs_use_version" --target_file="../conf/systemd.service"
    ynh_replace_string --match_string="__ENV_PATH__" --replace_string="$PATH" --target_file="../conf/systemd.service"
    ynh_replace_string --match_string="__DB_NAME__" --replace_string="$app" --target_file="../conf/systemd.service"
    ynh_replace_string --match_string="__URI__" --replace_string="$path_url/" --target_file="../conf/systemd.service"
    ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="../conf/systemd.service"
    ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="../conf/systemd.service"
    ynh_add_systemd_config
fi

if ynh_version_gt "1.07~ynh2" "${previous_version}" ; then

   # Replace mongodb packages
   # Assume no other app needs it >.>
   rm -f /etc/apt/sources.list.d/mongodb-org-3.2.list
   ynh_remove_app_dependencies
   ynh_install_app_dependencies "mongodb mongodb-server"
   yunohost service remove mongod
   yunohost service add mongodb --log "/var/log/mongodb/mongodb.log"

   # Gotta regen the systemd config because mongodb service name changed
   ynh_use_nodejs
   ynh_replace_string --match_string="__ENV_PATH__" --replace_string="$nodejs_path" --target_file="../conf/systemd.service"
   ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name" --target_file="../conf/systemd.service"
   ynh_replace_string --match_string="__DOMAIN_URI__" --replace_string="$domain$path_url" --target_file="../conf/systemd.service"
   ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="../conf/systemd.service"
   ynh_add_systemd_config
fi

if ynh_version_gt "2.48~ynh1" "${previous_version}" ; then
    # Install dependencies
    ynh_remove_nodejs
    ynh_install_nodejs --nodejs_version="8.16.0"
    ynh_use_nodejs
    
    # Create a dedicated systemd config
    ynh_replace_string --match_string="__NODEJS_PATH__" --replace_string="$nodejs_path" --target_file="../conf/systemd.service"
    ynh_add_systemd_config
    
    # Create a dedicated .env config
    config_file="$final_path/.env"
    ynh_backup_if_checksum_is_different --file="$config_file"
    cp "../conf/.env" "$config_file"
    ynh_replace_string --match_string="__NODEJS_PATH__" --replace_string="$nodejs_path" --target_file"$config_file"
    ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name" --target_file"$config_file"
    ynh_replace_string --match_string="__DOMAIN_URI__" --replace_string="$domain$path_url" --target_file"$config_file"
    ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file"$config_file"
    ynh_store_file_checksum "$config_file"
fi

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

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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_print_info --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_print_info --message="Upgrading source files..."
	
	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path" --source_id="$architecture"
fi

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

# Create a dedicated nginx config
ynh_add_nginx_config

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

ynh_install_nodejs --nodejs_version="8.16.0"
ynh_use_nodejs

ynh_install_app_dependencies $pkg_dependencies

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

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

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

# Create a dedicated systemd config
ynh_add_systemd_config

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

# Set permissions on app files
chown -R $app: "$final_path"
chmod -R 640 "$final_path"
find "$final_path" -type d -print0 | xargs -0 chmod 750

#=================================================
# SETUP SSOWAT
#=================================================
ynh_print_info --message="Upgrading SSOwat configuration..."

# 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_print_info --message="Starting a systemd service..."

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Kadira: completed instrumenting the app"
sleep 10

#=================================================
# RELOAD NGINX
#=================================================
ynh_print_info --message="Reloading nginx web server..."

ynh_systemd_action --service_name=nginx --action=reload

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

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