#!/bin/bash

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

source _common.sh
source ynh_install_ruby__2
source ynh_add_extra_apt_repos__3
source ynh_add_swap
source ynh_check_ram
source /usr/share/yunohost/helpers

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=4

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)
language=$(ynh_app_setting_get --app=$app --key=language)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)

db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)
admin_mail=$(ynh_user_get_info --username=$admin --key='mail')
port_web=$(ynh_app_setting_get --app=$app --key=port_web)
port_stream=$(ynh_app_setting_get --app=$app --key=port_stream)

paperclip_secret=$(ynh_app_setting_get --app=$app --key=paperclip_secret)
secret_key_base=$(ynh_app_setting_get --app=$app --key=secret_key_base)
otp_secret=$(ynh_app_setting_get --app=$app --key=otp_secret)
vapid_private_key=$(ynh_app_setting_get --app=$app --key=vapid_private_key)
vapid_public_key=$(ynh_app_setting_get --app=$app --key=vapid_public_key)

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

upgrade_type=$(ynh_check_app_version_changed)

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

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

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

# If port_web doesn't exist, create it, need 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 port_web doesn't exist, create it, need for old install
if [[ -z "$port_stream" ]]; then
	port_stream=4000
	ynh_app_setting_set --app=$app --key=port_stream --value=$port_stream
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=$app --key=db_pwd --value=$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=${db_pwd}" --target_file="${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+" ${final_path}/live/.env.production)
	if [[ -z "$paperclip_secret" ]]; then
	    paperclip_secret=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
	fi
	ynh_app_setting_set --app=$app --key=paperclip_secret --value="$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+" ${final_path}/live/.env.production)
	if [[ -z "$secret_key_base" ]]; then
	    secret_key_base=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
	fi
	ynh_app_setting_set --app=$app --key=secret_key_base --value="$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+" ${final_path}/live/.env.production)
	if [[ -z "$otp_secret" ]]; then
	    otp_secret=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
	fi
	ynh_app_setting_set --app=$app --key=otp_secret --value="$otp_secret"
fi

# If vapid_private_key doesn't exist, retrieve it or create it
if [[ -z "$vapid_private_key" ]]; then
	vapid_private_key=$(grep -oP "VAPID_PRIVATE_KEY=\K.+" ${final_path}/live/.env.production)
	vapid_public_key=$(grep -oP "VAPID_PUBLIC_KEY=\K.+" ${final_path}/live/.env.production)
	ynh_app_setting_set "$app" vapid_private_key "$vapid_private_key"
	ynh_app_setting_set "$app" vapid_public_key "$vapid_public_key"
fi

#Remove previous added repository
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=442

# 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

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

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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=22

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"
ynh_systemd_action --service_name=${app}-streaming --action="stop" --log_path=systemd --line_match="Stopped"

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
    ynh_script_progression --message="Upgrading source files..." --weight=14

    # Download Mastodon
    tmpdir="$(mktemp -d)"

    mkdir $tmpdir/system
    if [ -d "$final_path/live/public/system" ]; then
	    rsync -a "$final_path/live/public/system" "$tmpdir/."
    fi    
    rsync -a "$final_path/live/.env.production" "$tmpdir/."
    ynh_secure_remove --file="$final_path/live/"
    ynh_setup_source --dest_dir="$final_path/live"
    if [ -d "$tmpdir/system" ]; then
	    rsync -a "$tmpdir/system" "$final_path/live/public/."
    fi
    rsync -a "$tmpdir/.env.production" "$final_path/live/."
    ynh_secure_remove --file="$tmpdir/"

    # Clean files which are not needed anymore
    ynh_secure_remove --file="$final_path/live/config/initializers/timeout.rb"
fi

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading nginx web server configuration..." --weight=3

ynh_add_nginx_config 'port_web port_stream'

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=24

ynh_install_nodejs --nodejs_version="8"
ynh_install_app_dependencies $pkg_dependencies	
ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --weight=7

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app --home_dir=$final_path

#=================================================
# SPECIFIC UPGRADE
#=================================================
# ADD SWAP IF NEEDED
#=================================================

total_memory=$(ynh_check_ram)
total_swap=$(ynh_check_ram --only_swap)
swap_needed=0

if [ $total_memory -lt 2560 ]; then
	# Need a minimum of 8Go of memory
	swap_needed=$((2560 - $total_memory))
fi

ynh_script_progression --message="Adding $swap_needed Mo to swap..." --weight=1
ynh_add_swap --size=$swap_needed

#=================================================
# INSTALLING RUBY AND BUNDLER
#=================================================
ynh_script_progression --message="Installing Ruby..." --weight=424

ynh_install_ruby --ruby_version=2.6.5
/opt/rbenv/versions/2.6.5/bin/gem update --system
/opt/rbenv/versions/2.6.5/bin/gem install bundler:1.17.3 --no-document

#=================================================
# MODIFY A CONFIG FILE
#=================================================
ynh_script_progression --message="Modifying a config file..." --weight=1

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

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

ynh_replace_string --match_string="PAPERCLIP_SECRET=" --replace_string="PAPERCLIP_SECRET=$paperclip_secret" --target_file="${final_path}/live/.env.production"

ynh_replace_string --match_string="__SECRET_KEY_BASE__" --replace_string="$secret_key_base" --target_file="$final_path/live/.env.production"

ynh_replace_string --match_string="__OTP_SECRET__" --replace_string="$otp_secret" --target_file="$final_path/live/.env.production"

ynh_replace_string "__VAPID_PRIVATE_KEY__" "$vapid_private_key"        "$final_path/live/.env.production"
ynh_replace_string "__VAPID_PUBLIC_KEY__" "$vapid_public_key"        "$final_path/live/.env.production"

#=================================================
# UPGRADE MASTODON
#=================================================
ynh_script_progression --message="Upgrading Mastodon..." --weight=2640

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/2.6.5/bin/bundle install --deployment --without development test
        else
	        sudo -u "$app" env PATH=$PATH /opt/rbenv/versions/2.6.5/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/2.6.5/bin/bundle exec rails assets:clean
        sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.5/bin/bundle exec rails assets:precompile
        sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.5/bin/bundle exec rails db:migrate
        sudo -u "$app" env PATH=$PATH RAILS_ENV=production bin/tootctl cache clear
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.+" "$final_path/live/key.txt")
#	vapid_public_key=$(grep -oP "VAPID_PUBLIC_KEY=\K.+" "$final_path/live/key.txt")
#	ynh_app_setting_set "$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"
#    ynh_replace_string "__VAPID_PRIVATE_KEY__" "$vapid_private_key"        "${final_path}/live/.env.production"
#    ynh_replace_string "__VAPID_PUBLIC_KEY__" "$vapid_public_key"        "${final_path}/live/.env.production"
#fi

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

#=================================================
# SETUP CRON JOB FOR REMOVING CACHE
#=================================================
ynh_script_progression --message="Setuping a cron job for removing cache..." --weight=1

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

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=13

# Create a dedicated systemd config
ynh_replace_string --match_string="__PORT_WEB__"    --replace_string="$port_web"    --target_file="../conf/mastodon-web.service"
ynh_replace_string --match_string="__PORT_STREAM__" --replace_string="$port_stream" --target_file="../conf/mastodon-streaming.service"
ynh_replace_string --match_string="__NODEJS_PATH__" --replace_string="$nodejs_path" --target_file="../conf/mastodon-streaming.service"
ynh_add_systemd_config --service="$app-web"       --template="mastodon-web.service"
ynh_add_systemd_config --service="$app-sidekiq"   --template="mastodon-sidekiq.service"
ynh_add_systemd_config --service="$app-streaming" --template="mastodon-streaming.service"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================
ynh_script_progression --message="Securing files and directories..." --weight=9

# 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=48

ynh_systemd_action --service_name=${app}-web --action="start" --log_path=systemd --line_match="Listening on tcp"
ynh_systemd_action --service_name=${app}-sidekiq --action="start" --log_path=systemd --line_match="Starting processing"
ynh_systemd_action --service_name=${app}-streaming --action="start" --log_path=systemd --line_match="Worker 1 now listening"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading nginx web server..." --weight=2

ynh_systemd_action --service_name=nginx --action=reload

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

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