#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading 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)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name
db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
admin_email=$(ynh_app_setting_get --app=$app --key=admin_email)
random_key=$(ynh_app_setting_get --app=$app --key=random_key)
name=$(ynh_app_setting_get --app=$app --key=name)
port=$(ynh_app_setting_get --app=$app --key=port)
cache=$(ynh_app_setting_get --app=$app --key=cache)
size=$(ynh_app_setting_get --app=$app --key=size)
registration=$(ynh_app_setting_get --app=$app --key=registration)

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

upgrade_type=$(ynh_check_app_version_changed)

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

if [ ${PACKAGE_CHECK_EXEC:-0} -eq 1 ]; then
  sleep 60
fi
abort_if_up_to_date
# previous function is what defines 'version', more precisely the 'previous version'
previous_version="${version}"

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=1

# 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" --log_path=systemd --line_match="Stopped $app"

if ynh_version_gt "${previous_version}" "1.1.1~ynh1"  ; then
	pkill -u $app || true
fi

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

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

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

# Create a permission if needed
if ! ynh_permission_exists --permission="api"; then
	ynh_permission_create --permission="api" --url="/api" --allowed="visitors" --auth_header="false" --show_tile="false" --protected="true"
fi

# 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

# If db_user doesn't exist, create it
if [ -z "$db_user" ]; then
	db_user=$db_name
fi

# If db_pwd doesn't exist, create it
if [ -z "$db_pwd" ]; then
	db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)
	ynh_app_setting_set --app=$app --key=psqlpwd --value=$db_pwd
fi

# Switch variables name
psql_db=$(ynh_app_setting_get --app=$app --key=psql_db)

if [ -n "$psql_db" ]
then
	db_name=$(ynh_app_setting_get --app=$app --key=psql_db)
	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
	ynh_app_setting_delete --app=$app --key=psql_db
fi

# Close a port
if yunohost firewall list | grep -q "\- $port$"
then
	ynh_script_progression --message="Closing port $port..."
	ynh_exec_warn_less yunohost firewall disallow TCP $port
fi

# Remove old repository
ynh_secure_remove --file="/etc/apt/sources.list.d/erlang-solutions.list"
apt-key del A14F4FCA

# Switch to $final_path/live
if [ ! -d "$final_path/live" ]; then
	mv $final_path/$app $final_path/live
fi

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

#=================================================
# UPGRADE TO OTP RELEASE
#=================================================

config="/etc/$app/config.exs"
if ynh_version_gt "1.1.1~ynh1" "${previous_version}" ; then
	ynh_script_progression --message="Upgrading to OTP release..." --weight=1

	# Define app's data directory
	datadir="/home/yunohost.app/${app}"
	ynh_app_setting_set --app=$app --key=datadir --value="$datadir"

	# Create app folders
	mkdir -p "$datadir/"
	mkdir -p "$datadir/uploads/"
	mkdir -p "$datadir/static/"
	mkdir -p "$datadir/static/emoji/"

	# Give permission to the datadir
	chown -R "$app":"$app" "$datadir"

	rsync -a "$final_path/live/uploads/" "$datadir/uploads/"
	if [ -d "$final_path/live/instance/static/" ]; then
		rsync -a "$final_path/live/instance/static/" "$datadir/static/"
	fi

	rsync -a "$final_path/live/priv/static/emoji/" "$datadir/static/emoji/"

	mkdir -p /etc/$app
	chown -R $app /etc/$app
	mv $final_path/live/config/prod.secret.exs $config
	ynh_replace_string --match_string="use Mix.Config" --replace_string="import Config" --target_file="$config"
	echo "config :akkoma, :instance, static_dir: \"/home/yunohost.app/$app/static\"" >> $config
	echo "config :akkoma, akkoma.Uploaders.Local, uploads: \"/home/yunohost.app/$app/uploads\"" >> $config

	ynh_backup_if_checksum_is_different --file="$config"

	ynh_secure_remove --file="$final_path/live"
fi

if ynh_version_gt "2.0.5~ynh1" "${previous_version}" ; then
	cat "../conf/ldap.exs" >> "$config"
	ynh_replace_string --match_string="config :akkoma, configurable_from_database: false" --replace_string="config :akkoma, configurable_from_database: true" --target_file="$config"
fi

if ynh_version_gt "2.4.4~ynh2" "${previous_version}"; then
	registration_bool_value=`(($registration)) && echo "true" || echo "false"`
	ynh_replace_string --match_string='registrations_open: true' --replace_string="registrations_open: $registration_bool_value" --target_file="$config"
fi

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=1

	ynh_secure_remove --file="$final_path/live"
	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path/live" --source_id=$YNH_ARCH
fi

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

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=1

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

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

if [ $cache -eq 1 ]
then
	ynh_add_config --template="../conf/cache.conf" --destination="/etc/nginx/conf.d/$app-cache.conf"

	cat ../conf/media.conf >> ../conf/nginx.conf
fi

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# MAKE UPGRADE
#=================================================
ynh_script_progression --message="Making upgrade..." --weight=1

pushd $final_path/live
	ynh_exec_warn_less ynh_exec_as $app -s $SHELL -lc "$final_path/live/bin/pleroma_ctl migrate"
popd

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

config="/etc/$app/config.exs"

ynh_backup_if_checksum_is_different --file="$config"

chmod 400 "$config"
chown $app:$app "$config"

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

# Create a dedicated systemd config
ynh_add_systemd_config

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

yunohost service add $app --description="$app daemon for akkoma"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1

ynh_systemd_action --service_name=$app --action="start" --log_path=systemd --line_match="Access akkoma.Web.Endpoint"

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

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# POST UPGRADE
#=================================================

# Correct path to 'static dir' in DB
# This must be done when Pleroma is running (i.e. after install/upgrade and start)
ynh_exec_warn_less ynh_exec_as $app -s $SHELL -lc "$final_path/live/bin/pleroma_ctl config migrate_to_db"


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

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