#!/bin/bash

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

source _common.sh
source /usr/share/yunohost/helpers
source ynh_install_ruby
source ynh_add_secure_repos__2

#=================================================
# LOAD SETTINGS
#=================================================
ynh_print_info "Loading installation settings..."

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get $app domain)
path_url=$(ynh_app_setting_get $app path)
admin=$(ynh_app_setting_get $app admin)
is_public=$(ynh_app_setting_get $app is_public)
final_path=$(ynh_app_setting_get $app final_path)
language=$(ynh_app_setting_get $app language)
db_name=$(ynh_app_setting_get $app db_name)

db_pwd=$(ynh_app_setting_get $app db_pwd)
admin_mail=$(ynh_user_get_info $admin 'mail')
port_web=$(ynh_app_setting_get "$app" port_web)
port_stream=$(ynh_app_setting_get "$app" port_stream)

paperclip_secret=$(ynh_app_setting_get "$app" paperclip_secret)
secret_key_base=$(ynh_app_setting_get "$app" secret_key_base)
otp_secret=$(ynh_app_setting_get "$app" otp_secret)
ldap_user=$(ynh_app_setting_get "$app" ldap_user)
ldap_password=$(ynh_app_setting_get "$app" ldap_password)
vapid_private_key=$(ynh_app_setting_get "$app" vapid_private_key)
vapid_public_key=$(ynh_app_setting_get "$app" vapid_public_key)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_print_info "Ensuring downward compatibility..."

# If db_name doesn't exist, create it
if [ -z $db_name ]; then
	db_name=$(ynh_sanitize_dbid $app)
	ynh_app_setting_set $app db_name $db_name
fi

# If final_path doesn't exist, create it
if [ -z $final_path ]; then
	final_path=/var/www/$app
	ynh_app_setting_set $app final_path $final_path
fi

# Check if admin is not null
if [[ "$admin" = "" || "$language" = "" ]]; then
    echo "Unable to upgrade, please contact support"
    ynh_die
fi

# If db_pwd doesn't exist, create it, need for old install
if [[ -z "$db_pwd" ]]; then
	db_pwd=$(ynh_string_random)
	ynh_app_setting_set $app db_pwd $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 "DB_PASS=" "DB_PASS=${db_pwd}" "${final_path}/live/.env.production"
fi

# If paperclip_secret doesn't exist, retrieve it or create it
if [[ -z "$paperclip_secret" ]]; then
	paperclip_secret=$(grep -oP "PAPERCLIP_SECRET=\K\w+" test)
	if [[ -z "$paperclip_secret" ]]; then
	    paperclip_secret=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
	fi
	ynh_app_setting_set "$app" paperclip_secret "$paperclip_secret"
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+" test)
	if [[ -z "$secret_key_base" ]]; then
	    secret_key_base=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
	fi
	ynh_app_setting_set "$app" secret_key_base "$secret_key_base"
fi

# If otp_secret doesn't exist, retrieve it or create it
if [[ -z "$otp_secret" ]]; then
	otp_secret=$(grep -oP "OTP_SECRET=\K\w+" test)
	if [[ -z "$otp_secret" ]]; then
	    otp_secret=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
	fi
	ynh_app_setting_set "$app" otp_secret "$otp_secret"
fi

# If ldap_password doesn't exist, retrieve it or create it
if [[ -z "$ldap_user" ]]; then
	ldap_user="${app}ldap"
    ynh_user_exists $ldap_user || ynh_die "LDAP User $ldap_user already exist"
	ldap_password=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
	yunohost user create username -f $ldap_user -l $ldap_user -m $app@$domain -p $ldap_password -q 0
    ynh_app_setting_set "$app" ldap_user "$ldap_user"
	ynh_app_setting_set "$app" ldap_password "$ldap_password"
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_print_info "Backing up the app before upgrading (may take a while)..."

# 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

#=================================================
# CHECK THE PATH
#=================================================

# Normalize the URL path syntax
path_url=$(ynh_normalize_url_path $path_url)

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP MASTODON SERVICES
#=================================================
ynh_print_info "Stopping Mastodon services..."

yunohost service stop "$app-web"
yunohost service stop "$app-sidekiq"
yunohost service stop "$app-streaming"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_print_info "Upgrading source files..."

# Download Mastodon
mv "$final_path/live" "$final_path/live_back"
ynh_setup_source "$final_path/live"
if [ -z $final_path/live_back/public/system ]; then
	rsync -a "$final_path/live_back/public/system" "$final_path/live_back/public/."
fi
rsync -a "$final_path/live_back/.env.production" "$final_path/live/."
rm -Rf "$final_path/live_back"

# Clean files which are not needed anymore
ynh_secure_remove $final_path/live/config/initializers/timeout.rb

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_print_info "Upgrading nginx web server configuration..."

ynh_replace_string "__PORT_WEB__"    "$port_web"    "../conf/nginx.conf"
ynh_replace_string "__PORT_STREAM__" "$port_stream" "../conf/nginx.conf"
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_print_info "Upgrading dependencies..."

# Install extra_repo debian package backports & yarn
if [ "$(lsb_release --codename --short)" == "jessie" ]; then
	ynh_install_extra_repo --repo="deb http://httpredir.debian.org/debian jessie-backports main"
fi
ynh_install_extra_repo --repo="deb https://dl.yarnpkg.com/debian/ stable main" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
ynh_package_update

# Install nodejs
ynh_install_nodejs 8

# TODO: use the same mecanism with other files
ynh_install_app_dependencies $pkg_dependencies

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_print_info "Making sure dedicated system user exists..."

# Create a dedicated user (if not existing)
ynh_system_user_create $app

#=================================================
# SPECIFIC UPGRADE
#=================================================
# INSTALLING RUBY AND BUNDLER
#=================================================

ynh_install_ruby --ruby_version=2.6.0
/opt/rbenv/versions/2.6.0/bin/gem update --system
#/opt/rbenv/versions/2.6.0/bin/gem install bundler

#=================================================
# MODIFY A CONFIG FILE
#=================================================

cp -f ../conf/.env.production.sample "$final_path/live/.env.production"
ynh_replace_string "__DB_USER__" "$app" "$final_path/live/.env.production"
ynh_replace_string "__DB_NAME__" "$db_name" "$final_path/live/.env.production"
ynh_replace_string "__DB_PWD__" "$db_pwd" "$final_path/live/.env.production"
ynh_replace_string "__DOMAIN__" "$domain" "$final_path/live/.env.production"
ynh_replace_string "__SMTP_FROM_ADDRESS__" "$admin_mail"        "${final_path}/live/.env.production"

language="$(echo $language | head -c 2)"
ynh_replace_string "__LANGUAGE__"      "$language" "$final_path/live/.env.production"

ynh_replace_string "PAPERCLIP_SECRET=" "PAPERCLIP_SECRET=$paperclip_secret" "${final_path}/live/.env.production"

ynh_replace_string "__SECRET_KEY_BASE__" "$secret_key_base" "$final_path/live/.env.production"

ynh_replace_string "__OTP_SECRET__" "$otp_secret" "$final_path/live/.env.production"

ynh_replace_string "__LDAP_USER__" "$ldap_user"        "${final_path}/live/.env.production"
ynh_replace_string "__LDAP_PASSWORD__" "$ldap_password"        "${final_path}/live/.env.production"

#=================================================
# UPGRADE MASTODON
#=================================================
ynh_print_info "Upgrading Mastodon..."

chown -R "$app": "$final_path"

pushd "$final_path/live"
    ynh_use_nodejs
        if [ "$(lsb_release --codename --short)" == "jessie" ]; then
	        sudo -u "$app" env PATH=$PATH /opt/rbenv/versions/2.6.0/bin/bundle install --deployment --without development test
        else
	        sudo -u "$app" env PATH=$PATH /opt/rbenv/versions/2.6.0/bin/bundle install --deployment --force --without development test
        fi
        sudo -u "$app" env PATH=$PATH yarn install --pure-lockfile
        sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.0/bin/bundle exec rails assets:clean
        sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.0/bin/bundle exec rails assets:precompile
        sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.0/bin/bundle exec rails db:migrate
popd

# If vapid_private_key doesn't exist, retrieve it or create it
if [[ -z "$vapid_private_key" ]]; then
	sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.0/bin/bundle exec rake mastodon:webpush:generate_vapid_key > key.txt
	vapid_private_key=$(grep -oP "VAPID_PRIVATE_KEY=\K\w+" "$final_path/live/key.txt")
	vapid_public_key=$(grep -oP "VAPID_PUBLIC_KEY=\K\w+" "$final_path/live/key.txt")
	ynh_app_setting_set "$app" vapid_private_key "$vapid_private_key"
	ynh_app_setting_set "$app" vapid_public_key "$vapid_public_key"
	ynh_secure_remove "$final_path/live/key.txt"
fi

# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum "${final_path}/live/.env.production"

#=================================================
# SETUP CRON JOB FOR REMOVING CACHE
#=================================================
ynh_print_info "Setuping a cron job for removing cache..."

ynh_replace_string  "__FINAL_PATH__" "$final_path" ../conf/cron
ynh_replace_string "__USER__" "$app"  ../conf/cron
sudo cp -f ../conf/cron /etc/cron.d/$app 

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_print_info "Upgrading systemd configuration..."

# Create a dedicated systemd config
ynh_replace_string "__PORT_WEB__"    "$port_web"    "../conf/mastodon-web.service"
ynh_replace_string "__PORT_STREAM__" "$port_stream" "../conf/mastodon-streaming.service"
ynh_add_systemd_config "$app-web"       "mastodon-web.service"
ynh_add_systemd_config "$app-sidekiq"   "mastodon-sidekiq.service"
ynh_add_systemd_config "$app-streaming" "mastodon-streaming.service"

yunohost service start "$app-web"
yunohost service start "$app-sidekiq"
yunohost service start "$app-streaming"

# Waiting start all services
sleep 30

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

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

#=================================================
# SETUP SSOWAT
#=================================================
ynh_print_info "Upgrading SSOwat configuration..."

# 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 unprotected_uris "/"
fi

#=================================================
# RELOAD NGINX
#=================================================
ynh_print_info "Reloading nginx web server..."

systemctl reload nginx

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

ynh_print_info "Upgrade of $app completed"