#!/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)
language=$(ynh_app_setting_get --app=$app --key=language)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
redis_namespace=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$(ynh_sanitize_dbid --db_name=$app)
db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)
port_web=$(ynh_app_setting_get --app=$app --key=port_web)
secret_key_base=$(ynh_app_setting_get --app=$app --key=secret_key_base)

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

### This helper will compare the version of the currently installed app and the version of the upstream package.
### $upgrade_type can have 2 different values
### - UPGRADE_APP if the upstream app version has changed
### - UPGRADE_PACKAGE if only the YunoHost package has changed
### ynh_check_app_version_changed will stop the upgrade if the app is up to date.
### UPGRADE_APP should be used to upgrade the core app only if there's an upgrade to do.
upgrade_type=$(ynh_check_app_version_changed)

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

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

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

# If port_web doesn't exist, create it, needed for old install
if [[ -z "$port_web" ]]; then
	port_web=3000
	ynh_app_setting_set --app=$app --key=port_web --value=$port_web
fi

# If db_pwd doesn't exist, create it, needed for old install
if [[ -z "$db_pwd" ]]; then
	db_pwd=$(ynh_string_random)
	ynh_app_setting_set --app=$app --key=db_pwd --value=$db_pwd
	ynh_psql_test_if_first_run
	sudo --login --user=postgres psql -c"ALTER user $app WITH PASSWORD '$db_pwd'" postgres
	ynh_replace_string --match_string="DB_PASS=" --replace_string="DB_PASS=${db_pwd}" --target_file="$config"
fi

# If redis_namespace doesn't exist, create it
if [[ -z "$redis_namespace" ]]; then
	redis_namespace=${app}_production
	ynh_app_setting_set --app=$app --key=redis_namespace --value=$redis_namespace
fi

# If secret_key_base doesn't exist, retrieve it or create it
if [[ -z "$secret_key_base" ]]; then
	secret_key_base=$(grep -oP "SECRET_KEY_BASE=\K\w+" $config)
	if [[ -z "$secret_key_base" ]]; then
		secret_key_base=$(ynh_string_random --length=128)
	fi
	ynh_app_setting_set --app=$app --key=secret_key_base --value="$secret_key_base"
fi

ynh_remove_extra_repo
#=================================================
# 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=${app}-web --action="stop" --log_path=systemd --line_match="Stopped"
ynh_systemd_action --service_name=${app}-sidekiq --action="stop" --log_path=systemd --line_match="Stopped"


#=================================================
# 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=1

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"
fi

# FIXME: this should be managed by the core in the future
# Here, as a packager, you may have to tweak the ownerhsip/permissions
# such that the appropriate users (e.g. maybe www-data) can access
# files in some cases.
# But FOR THE LOVE OF GOD, do not allow r/x for "others" on the entire folder -
# this will be treated as a security issue.
chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

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

# Create a dedicated NGINX config
ynh_add_nginx_config 'web'

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

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
ynh_install_ruby --ruby_version=$RUBY_VERSION

#=================================================
# SPECIFIC UPGRADE
#=================================================

#=================================================
# INSTALLING RUBY AND BUNDLER
#=================================================
ynh_script_progression --message="Installing Ruby..."

pushd "$final_path"
	ynh_use_ruby
	ynh_gem install bundler:1.17.3 --no-document
	ynh_exec_as $app echo "gem: --no-ri --no-rdoc" >> "$final_path/.gemrc"
popd

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

database_yml="$final_path/config/database.yml"
diaspora_toml="$final_path/config/diaspora.toml"
language="$(echo $language | head -c 2)"

redis_namespace=${app}_production
ynh_app_setting_set --app="$app" --key=redis_namespace --value="$redis_namespace"

secret_key_base=$(ynh_string_random --length=128)
ynh_app_setting_set --app="$app" --key=secret_key_base --value="$secret_key_base"

ynh_add_config --template="$database_yml.example" --destination="$database_yml"
ynh_add_config --template="$diaspora_toml.example" --destination="$diaspora_toml"


ynh_replace_string --match_string="#certificate_authorities = \"/etc/ssl/" --replace_string="certificate_authorities = \"/etc/ssl/" --target_file=$diaspora_toml
ynh_replace_string --match_string="username: \"postgres\"" --replace_string="username: \"$db_user\"" --target_file=$database_yml
ynh_replace_string --match_string="password: \"postgres\"" --replace_string="password: \"$db_pwd\"" --target_file=$database_yml

chmod 400 "$database_yml"
chown $app:$app "$database_yml"

chmod 400 "$diaspora_toml"
chown $app:$app "$diaspora_toml"

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

# Create a dedicated systemd config
ynh_add_systemd_config --service="$app-web" --template="acropolis-web.service"
ynh_add_systemd_config --service="$app-sidekiq" --template="acropolis-sidekiq.service"


ynh_script_progression --message="Upgrading acropolis..."

pushd "$final_path"
	sudo -u $app $ynh_ruby_load_path bin/bundle config deployment 'true'
	sudo -u $app $ynh_ruby_load_path bin/bundle config without 'development test'
	sudo -u $app $ynh_ruby_load_path bin/bundle install -j$(getconf _NPROCESSORS_ONLN)
	sudo -u $app RAILS_ENV=production $ynh_ruby_load_path bin/bundle exec rails assets:clean
	sudo -u $app RAILS_ENV=production $ynh_ruby_load_path bin/bundle exec rails assets:precompile
	sudo -u $app RAILS_ENV=production $ynh_ruby_load_path bin/bundle exec rails db:migrate
popd

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

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

yunohost service add "$app-web" --description="$app web service"
yunohost service add "$app-sidekiq" --description="$app sidekiq service"

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

ynh_systemd_action --service_name=${app}-web --action="start" --log_path=systemd --line_match="Listening on"
ynh_systemd_action --service_name=${app}-sidekiq --action="start" --log_path=systemd --line_match="Schedules Loaded"

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