#!/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)
path_url=$(ynh_app_setting_get --app=$app --key=path)
admin=$(ynh_app_setting_get --app=$app --key=admin)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
port=$(ynh_app_setting_get --app=$app --key=port)
service_config=$(ynh_app_setting_get --app=$app --key=service_config)

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

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

# 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 "$final_path" ]; then
	final_path=/opt/yunohost/$app
	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
fi

# If service_config doesn't exist, create it
if [ -z "$service_config" ]; then
	service_config="/etc/default/$app"
	ynh_app_setting_set --app=$app --key=service_config --value=$service_config
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=5

# 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..." --weight=1

ynh_systemd_action --service_name=$app --action="stop"
#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=94

	# 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
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=4

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

#=================================================
# SPECIFIC UPGRADE
#=================================================
# CREATE DIRECTORIES
#=================================================

mkdir -p /home/yunohost.airsonic/{Podcasts,Playlists}

#=================================================
# SECURING FILES AND DIRECTORIES
#=================================================

chown -R $app:www-data /home/yunohost.airsonic/
chmod -R 764 /home/yunohost.airsonic

#=================================================
# YUNOHOST MULTIMEDIA INTEGRATION
#=================================================
ynh_script_progression --message="Adding multimedia directories..." --weight=3

ynh_multimedia_build_main_dir
ynh_multimedia_addfolder --source_dir="/home/yunohost.airsonic/Podcasts" --dest_dir="share/Podcasts"
ynh_multimedia_addfolder --source_dir="/home/yunohost.airsonic/Playlists" --dest_dir="share/Playlists"
# Allow airsonic to write into these directories
ynh_multimedia_addaccess $app

if ! grep -q "PodcastFolder" $final_path/airsonic.properties; then
	echo "PodcastFolder=/home/yunohost.multimedia/share/Podcasts" >> $final_path/airsonic.properties
fi

if ! grep -q "PlaylistFolder" $final_path/airsonic.properties; then
	echo "PlaylistFolder=/home/yunohost.multimedia/share/Playlists" >> $final_path/airsonic.properties
fi

#=================================================
# ENABLE "TRANSCODE"
#=================================================

### For details, see https://airsonic.github.io/docs/transcode/

mkdir -p $final_path/transcode

if [ -x /usr/bin/ffmpeg -a ! -e $final_path/transcode/ffmpeg ]; then   # Check if 'ffmpeg' is installed, executable and that the symlink doesn't exist
	ln -s /usr/bin/ffmpeg $final_path/transcode
fi

# FIXME Not sure if 'lame' is needed ?
if [ -x /usr/bin/lame -a ! -e $final_path/transcode/lame ]; then   # Check if 'lame' is installed, executable and that the symlink doesn't exist
	ln -s /usr/bin/lame $final_path/transcode
fi

# Ensure links belong to the $app user
chown $app: $final_path/transcode

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

ynh_backup_if_checksum_is_different --file="$final_path/airsonic.properties"

cp ../conf/airsonic.properties $final_path/airsonic.properties

# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file="$final_path/airsonic.properties"

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..." --weight=1

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append --logfile="$final_path/airsonic.log"

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

# Create a dedicated systemd config
ynh_add_systemd_config

ynh_backup_if_checksum_is_different --file="$service_config"

# Copy config. template to right location
cp ../conf/systemd-sysconfig $service_config

ynh_replace_string --match_string="__FINALPATH__" --replace_string=$final_path --target_file="$service_config"
ynh_replace_string --match_string="__PORT__" --replace_string=$port --target_file="$service_config"
ynh_replace_string --match_string="__PATH__" --replace_string=$path_url --target_file="$service_config"

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

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

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

# 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_script_progression --message="Starting a systemd service..." --weight=12

ynh_systemd_action --service_name=$app --action="start" --log_path="$final_path/airsonic.log" --line_match="Started Application in"

# Use multimedia folder if needed
if ! grep -q "/home/yunohost.multimedia/share/Music" $final_path/db/airsonic.script; then
	ynh_systemd_action --service_name=$app --action="stop"

	# Use multimedia folder
	ynh_replace_string --match_string="INSERT INTO MUSIC_FOLDER VALUES(0,'/var/music','Music'" --replace_string="INSERT INTO MUSIC_FOLDER VALUES(0,'/home/yunohost.multimedia/share/Music','YunoHost Music'" --target_file="$final_path/db/airsonic.script"

	ynh_script_progression --message="Restarting a systemd service..." --weight=12

	# Start a systemd service
	ynh_systemd_action --service_name=$app --action="start" --log_path="$final_path/airsonic.log" --line_match="Started Application in"
fi

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

ynh_systemd_action --service_name=nginx --action=reload

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

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