#!/bin/bash

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

source _common.sh
source ynh_install_ruby
source ynh_add_secure_repos__3
source ynh_send_readme_to_admin__2
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..." --time --weight=1

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

if [ "$admin" != "package_checker" ]
then
	# TODO : to be factorized into a helper someday ? ;)
	MEM=$(free | grep "^Mem"  | awk '{print $2}')
	SWAP=$(free | grep "^Swap" | awk '{print $2}')
	TOTAL_MEM_AND_SWAP=$(( ( $MEM+$SWAP ) / 1024 )) # In MB

	[[ $TOTAL_MEM_AND_SWAP -gt 2500 ]] || ynh_die "You need at least 2500 Mo of RAM+Swap to install Mastodon. Please consult the README to learn how to add swap."

fi

# 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..." --time --weight=1

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..." --time --weight=1

# Find a free port
port_web=$(ynh_find_port 3000)
port_stream=$(ynh_find_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..." --time --weight=1

# Import debian archive pubkey, need on ARM arch
arch=$(uname -m)
if [[ "$arch" = arm*  ]]; then
	apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 8B48AD6246925553
	apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 7638D0442B90D010
fi

# 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" --append
fi

ynh_install_extra_repo --repo="deb https://dl.yarnpkg.com/debian/ stable main" --key="https://dl.yarnpkg.com/debian/pubkey.gpg" --append

# install nodejs
ynh_install_nodejs --nodejs_version="8"

ynh_install_app_dependencies $pkg_dependencies	

#=================================================
# CREATE A POSTGRESQL DATABASE
#=================================================
ynh_script_progression --message="Creating a PostgreSQL database..." --time --weight=1

# Create postgresql database
db_name="${app}_production"
db_user=$app
db_pwd=$(ynh_string_random 30)
ynh_app_setting_set --app=$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

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..." --time --weight=1

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

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring nginx web server..." --time --weight=1

# Create a dedicated nginx config
ynh_add_nginx_config 'port_web port_stream'

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..." --time --weight=1

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

#=================================================
# SPECIFIC SETUP
#=================================================
# INSTALLING RUBY AND BUNDLER
#=================================================
ynh_script_progression --message="Installing Ruby..." --time --weight=1

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 --no-document

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

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"

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="${final_path}/live/.env.production"
ynh_app_setting_set --app="$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="$final_path/live/.env.production"
ynh_app_setting_set --app="$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="$final_path/live/.env.production"
ynh_app_setting_set --app="$app" --key=otp_secret --value="$otp_secret"

#=================================================
# INSTALLING MASTODON
#=================================================
ynh_script_progression --message="Installing Mastodon..." --time --weight=1

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

pushd "$final_path/live"
	ynh_use_nodejs
	sudo -u "$app" env PATH=$PATH /opt/rbenv/versions/2.6.0/bin/bundle install -j$(getconf _NPROCESSORS_ONLN) --deployment --without development test
	sudo -u "$app" env PATH=$PATH yarn install --pure-lockfile
	sudo -u "$app" echo "SAFETY_ASSURED=1">> .env.production
	sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.0/bin/bundle exec rails db:migrate --quiet
	sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.0/bin/bundle exec rails assets:precompile --quiet
	sudo -u "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/2.6.0/bin/bundle exec rake mastodon:webpush:generate_vapid_key > key.txt
	sudo -u "$app" env PATH=$PATH RAILS_ENV=production bin/tootctl accounts create "$admin" --email="$admin_mail" --confirmed --role=admin > acc.txt
popd

admin_pass=$( tail -1 $final_path/live/acc.txt | head -1 | cut -c 15- )
ynh_secure_remove --file="$final_path/live/acc.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_replace_string --match_string="__VAPID_PRIVATE_KEY__" --replace_string="$vapid_private_key"        --target_file="${final_path}/live/.env.production"
ynh_replace_string --match_string="__VAPID_PUBLIC_KEY__" --replace_string="$vapid_public_key"        --target_file="${final_path}/live/.env.production"

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

# 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"

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================
ynh_script_progression --message="Storing the config file checksum..." --time --weight=1

# Calculate and store the config file checksum into the app settings
ynh_store_file_checksum "${final_path}/live/.env.production"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================
ynh_script_progression --message="Securing files and directories..." --time --weight=1

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

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================
ynh_script_progression --message="Advertising service in admin panel..." --time --weight=1

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

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

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..." --time --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

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

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# SEND A README FOR THE ADMIN
#=================================================
ynh_script_progression --message="Sending a readme for the admin..." --time --weight=1

message="Mastodon was successfully installed :)
Please open 'https://$domain$path_url'
The admin email is: $admin_mail
The admin password is: $admin_pass
If you facing an issue or want to improve this app, please open a new issue in this project: https://github.com/YunoHost-Apps/mastodon_ynh"

ynh_send_readme_to_admin --app_message=$message --recipients=$admin_mail --type='install'

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

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