#!/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)
port=$(ynh_app_setting_get --app=$app --key=port)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
secret=$(ynh_app_setting_get --app=$app --key=secret)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name
db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
max_file_size=$(ynh_app_setting_get --app=$app --key=max_file_size)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..."

upgrade_type=$(ynh_check_app_version_changed)

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

# 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 [ -z "$db_pwd" ]; then
	# Need to install new dependencies before creating the new database
	need_migration_from_sqlite_to_psql=1
else
	need_migration_from_sqlite_to_psql=0
fi

if [ -z "$max_file_size" ]; then
	max_file_size=100 # 100 Mo
	ynh_app_setting_set --app=$app --key=max_file_size --value=$max_file_size
fi

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

	ynh_app_setting_delete --app=$app --key=is_public
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

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

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

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

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

	# 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..."

# Create a dedicated nginx config
ynh_add_nginx_config max_file_size

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

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

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

#=================================================
# SPECIFIC UPGRADE
#=================================================
# CREATE A POSTGRESQL DATABASE IF NEEDED
#=================================================

if [ $need_migration_from_sqlite_to_psql -eq 1 ]; then
	ynh_print_info --message="Creating a PostgreSQL database..."
	# Create postgresql database
	ynh_psql_test_if_first_run
	db_name=$(ynh_sanitize_dbid --db_name=$app)
	db_user=$db_name
	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
	# Initialize database and store postgres password for upgrade
	ynh_psql_setup_db --db_user=$db_user --db_name=$db_name
	db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd) # Password created in ynh_psql_setup_db function
fi

#=================================================
# SETUP LUFI
#=================================================
ynh_script_progression --message="Configuring lufi..."

config=${final_path}/lufi.conf
ynh_backup_if_checksum_is_different --file="$config"
cp ../conf/lufi.conf.template "$config"
ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$config"
ynh_replace_string --match_string="__PATH__" --replace_string="$path_url" --target_file="$config"
ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$config"
ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name" --target_file="$config"
ynh_replace_string --match_string="__DB_USER__" --replace_string="$db_user" --target_file="$config"
ynh_replace_string --match_string="__DB_PWD__" --replace_string="$db_pwd" --target_file="$config"
ynh_replace_string --match_string="__MAX_FILE_SIZE__" --replace_string="$max_file_size" --target_file="$config"
if [ $max_file_size -eq 0 ]; then # Comment the limitation line if no limit
	ynh_replace_string --match_string="max_file_size" --replace_string="#max_file_size" --target_file="$config"
fi
ynh_replace_string --match_string="__SECRET__" --replace_string="$secret" --target_file="$config"

if [ $is_public -eq 0 ];
then
	ynh_replace_string --match_string="__IS_PUBLIC__" --replace_string="" --target_file="$config"
else
	ynh_replace_string --match_string="__IS_PUBLIC__" --replace_string="#" --target_file="$config"
fi

ynh_store_file_checksum --file="$config"

#=================================================
# BUILD LUFI
#=================================================
ynh_script_progression --message="Building Lufi..."

pushd $final_path
# Migrate from SQLite to PostgreSQL
if [ $need_migration_from_sqlite_to_psql -eq 1 ]; then
	# Preinstall with sqlite
	carton install --deployment --without=mysql --without=htpasswd --without=test

	# if /var/log/$app/production.log is a symbolic link, then move it to $final_path/log/production.log
	if [ ! -L "/var/log/$app/production.log" ]
	then
		mv "/var/log/$app/production.log" "$final_path/log/production.log"
		chown -R $app: "$final_path/log/production.log"
	fi

	carton exec script/lufi sqliteToOtherDB
fi

carton install --deployment --without=sqlite --without=mysql --without=htpasswd --without=test
popd

#=================================================
# SETUP CRON
#=================================================
ynh_script_progression --message="Setuping cron..."

ynh_add_config --template="../conf/cron_lufi" --destination="/etc/cron.d/$app"
chmod +x $final_path/script/lufi

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================
ynh_script_progression --message="Storing the config file checksum..."

yunohost service add $app --description="Lufi service" --log="$final_path/log/production.log"

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

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

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

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURING FILES AND DIRECTORIES
#=================================================
ynh_script_progression --message="Securing files and directories..."

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

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

ynh_permission_update --permission="main" --add="visitors"

if [ $is_public -eq 0 ]
then
	if [ "$path_url" == "/" ]; then
	    # If the path is /, clear it to prevent any error with the regex.
	    path_url=""
	fi
	# Modify the domain to be used in a regex
	domain_regex=$(echo "$domain" | sed 's@-@.@g')
	ynh_app_setting_set --app=$app --key=protected_regex --value="$domain_regex$path_url/stats$","$domain_regex$path_url/manifest.webapp$","$domain_regex$path_url/$","$domain_regex$path_url/d/.*$","$domain_regex$path_url/m/.*$"
fi

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

ynh_systemd_action --service_name=$app --action="restart" --log_path="$final_path/log/production.log" --line_match="Creating process id file"

#=================================================
# 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"