#!/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)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
port=$(ynh_app_setting_get --app=$app --key=port)
datadir=$(ynh_app_setting_get --app=$app --key=datadir)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..." --weight=1

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)..." --weight=5

# 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..." --weight=1

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

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

# 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 public_path doesn't exist, create it
if [ -z "$datadir" ]; then
	datadir=/home/yunohost.app/$app
	mkdir -p $datadir/{Podcasts,Playlists}
	chmod 764 "$datadir"
	chmod -R o-rwx "$datadir"
	chown -R $app:www-data "$datadir"
	ynh_app_setting_set --app=$app --key=datadir --value=$datadir
	cp -a "/home/yunohost.$app" "$datadir"
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

# Rename legacy folder to proper location
if [[ ! -e /home/yunohost.app/$app ]] && [[ -e /home/yunohost.$app ]]
then
    mkdir -p /home/yunohost.app/
    mv /home/yunohost.$app /home/yunohost.app/$app
fi

mkdir -p $datadir/{Podcasts,Playlists}

chmod 764 "$datadir"
chmod -R o-rwx "$datadir"
chown -R $app:www-data "$datadir"

#=================================================
# 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=$app --home_dir="$final_path"

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

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

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

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1

# Create a dedicated NGINX config
ynh_add_nginx_config

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

ynh_multimedia_build_main_dir
ynh_multimedia_addfolder --source_dir="/home/yunohost.app/$app/Podcasts" --dest_dir="share/Podcasts"
ynh_multimedia_addfolder --source_dir="/home/yunohost.app/$app/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

# Allow Airsonic to write into these directories
ynh_multimedia_addaccess $app

#=================================================
# ENABLE "TRANSCODE"
#=================================================
ynh_script_progression --message="Enabling transcode..." --weight=1

### 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

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=1

ynh_add_config --template="../conf/systemd-sysconfig" --destination="/etc/default/$app"
chmod 600 "/etc/default/$app"
chown $app:$app "/etc/default/$app"

ynh_add_config --template="../conf/airsonic.properties" --destination="$final_path/airsonic.properties"
chmod 600 "$final_path/airsonic.properties"
chown $app:$app "$final_path/airsonic.properties"

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

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# USE MULTIMEDIA
#=================================================
ynh_script_progression --message="Using multimedia..." --weight=1

# 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

#=================================================
# GENERIC FINALIZATION
#=================================================
# 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="$final_path/$app.log"

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1

yunohost service add $app --description="Airsonic daemon" --log="$final_path/$app.log"

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

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