#!/bin/bash

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

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

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

ynh_clean_setup () {
	ynh_clean_check_starting
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================

domain=$YNH_APP_ARG_DOMAIN
path_url="/"
admin=$YNH_APP_ARG_ADMIN
is_public=$YNH_APP_ARG_IS_PUBLIC
language=$YNH_APP_ARG_LANGUAGE

admin_mail=$(ynh_user_get_info $admin 'mail')

app=$YNH_APP_INSTANCE_NAME

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..."

final_path=/var/www/$app
test ! -e "$final_path" || ynh_die --message="This path already contains a folder"

# Register (book) web path
ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..."

ynh_app_setting_set --app=$app --key=domain --value=$domain
ynh_app_setting_set --app=$app --key=path --value=$path_url
ynh_app_setting_set --app=$app --key=admin --value=$admin
ynh_app_setting_set --app=$app --key=is_public --value=$is_public
ynh_app_setting_set --app=$app --key=language --value=$language

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_script_progression --message="Configuring firewall..."

# Find an available port
port_web=$(ynh_find_port --port=3000)
port_stream=$(ynh_find_port --port=4000)
# Open this port
ynh_app_setting_set --app=$app --key=port_web --value=$port_web
ynh_app_setting_set --app=$app --key=port_stream --value=$port_stream

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..."

ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
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 A POSTGRESQL DATABASE
#=================================================
ynh_script_progression --message="Creating a MySQL database..."

# Create postgresql database
db_name="${app}_production"
db_user=$app
db_pwd=$(ynh_string_random --length=30)
ynh_app_setting_set --app=$app --key=db_name --value=$db_name
ynh_app_setting_set --app=$app --key=db_pwd --value=$db_pwd
ynh_psql_test_if_first_run
ynh_psql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
ynh_psql_execute_as_root --sql="ALTER USER $db_user CREATEDB;"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..."

ynh_app_setting_set --app=$app --key=final_path --value=$final_path
# Download, check integrity, uncompress and patch the source from app.src
mkdir $final_path

if [ "$(lsb_release --codename --short)" = "buster" ]; then
    ynh_setup_source --dest_dir="$final_path/live"
else
    ynh_script_progression --message="Setting up source files..."

    ynh_setup_source --dest_dir="$final_path/live" --source_id=jessie
    
    # Temporary workaround for https://github.com/tootsuite/mastodon/issues/13292
    ynh_replace_string --match_string="sidekiq-unique-jobs (6.0.18)" --replace_string="sidekiq-unique-jobs (6.0.20)" --target_file="$final_path/live/Gemfile.lock"
fi

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring nginx web server..."

# Create a dedicated nginx config
ynh_add_nginx_config 'port_web port_stream'

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..."

# Create a system user
ynh_system_user_create --username=$app --home_dir=$final_path

#=================================================
# SPECIFIC SETUP
#=================================================
# ADD SWAP IF NEEDED
#=================================================
ynh_script_progression --message="Adding swap is needed..."

total_memory=$(ynh_get_ram --total)
swap_needed=0

if [ $total_memory -lt $MEMORY_NEEDED ]; then
	# Need a minimum of 2.5Go of memory
	swap_needed=$(($MEMORY_NEEDED - $total_memory))
fi

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

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

ynh_install_ruby --ruby_version=$RUBY_VERSION
pushd "$final_path/live"
	gem update --system
	gem install bundler:$BUNDLER_VERSION --no-document
popd

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

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

language="$(echo $language | head -c 2)"
ynh_replace_string --match_string="__LANGUAGE__" --replace_string="$language" --target_file="$config"

paperclip_secret=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
ynh_replace_string --match_string="PAPERCLIP_SECRET=" --replace_string="PAPERCLIP_SECRET=$paperclip_secret" --target_file="$config"
ynh_app_setting_set --app="$app" --key=paperclip_secret --value="$paperclip_secret"

secret_key_base=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
ynh_replace_string --match_string="__SECRET_KEY_BASE__" --replace_string="$secret_key_base" --target_file="$config"
ynh_app_setting_set --app="$app" --key=secret_key_base --value="$secret_key_base"

otp_secret=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
ynh_replace_string --match_string="__OTP_SECRET__" --replace_string="$otp_secret" --target_file="$config"
ynh_app_setting_set --app="$app" --key=otp_secret --value="$otp_secret"

ynh_replace_string --match_string="registrations_mode: 'open'" --replace_string="registrations_mode: 'none'" --target_file="$final_path/live/config/settings.yml"
ynh_replace_string --match_string="min_invite_role: 'admin'" --replace_string="min_invite_role: 'none'" --target_file="$final_path/live/config/settings.yml"

#=================================================
# INSTALLING MASTODON
#=================================================
ynh_script_progression --message="Installing Mastodon..."

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

pushd "$final_path/live"
	ynh_use_nodejs
	bundle config deployment 'true'
	bundle config without 'development test'
	bundle install -j$(getconf _NPROCESSORS_ONLN)
	yarn install --pure-lockfile
	echo "SAFETY_ASSURED=1">> $config
	RAILS_ENV=production bundle exec rails db:setup --quiet
	RAILS_ENV=production bundle exec rails assets:precompile --quiet
	RAILS_ENV=production bundle exec rake mastodon:webpush:generate_vapid_key > key.txt
	RAILS_ENV=production bin/tootctl accounts create "$admin" --email="$admin_mail" --confirmed --role=admin > /dev/null
	RAILS_ENV=production bin/tootctl accounts modify "$admin" --approve
popd

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_replace_string --match_string="__VAPID_PRIVATE_KEY__" --replace_string="$vapid_private_key" --target_file="$config"
ynh_replace_string --match_string="__VAPID_PUBLIC_KEY__" --replace_string="$vapid_public_key" --target_file="$config"

ynh_app_setting_set --app="$app" --key=vapid_private_key --value="$vapid_private_key"
ynh_app_setting_set --app="$app" --key=vapid_public_key --value="$vapid_public_key"

ynh_secure_remove --file="$final_path/live/key.txt"

#=================================================
# SETUP THE CRON FILE
#=================================================
ynh_script_progression --message="Setuping the cron file..."

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

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..."

# Create a dedicated systemd config
ynh_add_systemd_config --service="$app-web" --template="mastodon-web.service" --others_var="port_web RBENV_ROOT"
ynh_add_systemd_config --service="$app-sidekiq" --template="mastodon-sidekiq.service" --others_var="RBENV_ROOT"
ynh_add_systemd_config --service="$app-streaming" --template="mastodon-streaming.service" --others_var="port_stream ynh_node_load_PATH ynh_node"

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================
ynh_script_progression --message="Storing the config file checksum..."

# Calculate and store the config file checksum into the app settings
ynh_store_file_checksum --file="$config"

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

# Set permissions to app files
chown -R "$app": "$final_path"

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

yunohost service add "$app-web" --description "$app web service" --log_type "systemd"
yunohost service add "$app-sidekiq" --description "$app sidekiq service" --log_type "systemd"
yunohost service add "$app-streaming" --description "$app streaming service" --log_type "systemd"

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

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"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring SSOwat..."

# 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

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

ynh_systemd_action --service_name=nginx --action=reload

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

ynh_script_progression --message="Installation of $app completed"