#!/bin/bash

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

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

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

ynh_clean_setup () {
	### Remove this function if there's nothing to clean before calling the remove script.
	read -p "Press any key..."
	true
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

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

domain=$YNH_APP_ARG_DOMAIN
path_url="/"
admin_mastodon=$YNH_APP_ARG_ADMIN
is_public=true
language=$YNH_APP_ARG_LANGUAGE

admin_mastodon_mail=$(ynh_user_get_info $admin_mastodon 'mail')
port_web=$(ynh_find_port 3000)
port_stream=$(ynh_find_port 4000)


app=$YNH_APP_INSTANCE_NAME

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

### If the app uses nginx as web server (written in HTML/PHP in most cases), the final path should be "/var/www/$app".
### If the app provides an internal web server (or uses another application server such as uwsgi), the final path should be "/opt/yunohost/$app"
final_path=/var/www/$app
test ! -e "$final_path" || ynh_die "This path already contains a folder"

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

# Check web path availability
ynh_webpath_available $domain $path_url
# Register (book) web path
ynh_webpath_register $app $domain $path_url

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_print_info "Storing installation settings..."

ynh_app_setting_set $app domain      $domain
ynh_app_setting_set $app path $path_url
ynh_app_setting_set $app admin       $admin_mastodon
ynh_app_setting_set $app is_public $is_public
ynh_app_setting_set $app language    $language
ynh_app_setting_set $app port_web    $port_web
ynh_app_setting_set $app port_stream $port_stream

#=================================================
# STANDARD MODIFICATIONS
#=================================================


#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_print_info "Installing dependencies..."

# TODO: add in a clean way backports and yarn

# 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 source.list debian package backports & yarn
if [ "$(lsb_release --codename --short)" == "jessie" ]; then
	echo "deb http://httpredir.debian.org/debian jessie-backports main" | tee /etc/apt/sources.list.d/jessie-backports.list
fi
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
ynh_package_update

# install nodejs
ynh_install_nodejs 8

# install ruby
ynh_install_ruby --ruby_version=2.6.0

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

#=================================================
# CREATE A POSTGRESQL DATABASE
#=================================================
ynh_print_info "Creating a PostgreSQL database..."

# Create postgresql database
db_name="${app}_production"
db_pwd=$(ynh_string_random 30)
ynh_app_setting_set "$app" db_name "$db_name"
ynh_app_setting_set "$app" db_pwd "$db_pwd"
ynh_psql_test_if_first_run
ynh_psql_create_user "$app" "$db_pwd"
ynh_psql_execute_as_root \
"CREATE DATABASE $db_name ENCODING 'UTF8' LC_COLLATE='C' LC_CTYPE='C' template=template0 OWNER $app;"

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

### `ynh_setup_source` is used to install an app from a zip or tar.gz file,
### downloaded from an upstream source, like a git repository.
### `ynh_setup_source` use the file conf/app.src

ynh_app_setting_set $app final_path $final_path
# Download, check integrity, uncompress and patch the source from app.src

ynh_setup_source "$final_path/live"                      "app-mastodon"

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_print_info "Configuring nginx web server..."

### `ynh_add_nginx_config` will use the file conf/nginx.conf

# Create a dedicated nginx config
ynh_replace_string "__PORT_WEB__"    "$port_web"    "../conf/nginx.conf"
ynh_replace_string "__PORT_STREAM__" "$port_stream" "../conf/nginx.conf"
ynh_add_nginx_config

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_print_info "Configuring system user..."

# Create a system user
ynh_system_user_create $app $final_path

#=================================================
# SPECIFIC SETUP
#=================================================
# MODIFY A CONFIG FILE
#=================================================

cp -a $final_path/live/.env.production.sample $final_path/live/.env.production
ynh_replace_string "REDIS_HOST=redis"         "REDIS_HOST=127.0.0.1"        "${final_path}/live/.env.production"
ynh_replace_string "DB_HOST=db"               "DB_HOST=/var/run/postgresql" "${final_path}/live/.env.production"
ynh_replace_string "DB_USER=postgres"         "DB_USER=${app}"              "${final_path}/live/.env.production"
ynh_replace_string "DB_NAME=postgres"         "DB_NAME=${db_name}"          "${final_path}/live/.env.production"
ynh_replace_string "DB_PASS="                 "DB_PASS=${db_pwd}"           "${final_path}/live/.env.production"
ynh_replace_string "LOCAL_DOMAIN=example.com" "LOCAL_DOMAIN=${domain}"      "${final_path}/live/.env.production"

language="$(echo $language | head -c 2)"
ynh_replace_string "# DEFAULT_LOCALE=de"      "DEFAULT_LOCALE=${language}"  "${final_path}/live/.env.production"

paperclip_secret=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
secret_key_base=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
otp_secret=$(head -n128 /dev/urandom | tail -n +1 | tr -dc -d 'a-z0-9' | head -c128)
ynh_replace_string "PAPERCLIP_SECRET=" "PAPERCLIP_SECRET=$paperclip_secret" "${final_path}/live/.env.production"
ynh_replace_string "SECRET_KEY_BASE="  "SECRET_KEY_BASE=$secret_key_base"   "${final_path}/live/.env.production"
ynh_replace_string "OTP_SECRET="       "OTP_SECRET=$otp_secret"             "${final_path}/live/.env.production"

ynh_replace_string "SMTP_LOGIN="                                 "#SMTP_LOGIN="                                     "${final_path}/live/.env.production"
ynh_replace_string "SMTP_PASSWORD="                              "#SMTP_PASSWORD="                                  "${final_path}/live/.env.production"
ynh_replace_string "SMTP_SERVER=smtp.mailgun.org"                "SMTP_SERVER=localhost"                            "${final_path}/live/.env.production"
ynh_replace_string "SMTP_PORT=587"                               "SMTP_PORT=25"                                     "${final_path}/live/.env.production"
ynh_replace_string "SMTP_FROM_ADDRESS=notifications@example.com" "SMTP_FROM_ADDRESS=$admin_mastodon@$domain"        "${final_path}/live/.env.production"
ynh_replace_string "#SMTP_AUTH_METHOD=plain"                     "SMTP_AUTH_METHOD=none"                            "${final_path}/live/.env.production"
ynh_replace_string "#SMTP_OPENSSL_VERIFY_MODE=peer"              "SMTP_OPENSSL_VERIFY_MODE=none"                    "${final_path}/live/.env.production"

#=================================================
# INSTALLING MASTODON
#=================================================
ynh_print_info "Installing Mastodon..."

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

pushd "$final_path/live"
	ynh_use_nodejs
	sudo -u "$app" env PATH=$PATH /opt/rbenv/versions/2.6.0/bin/gem update --system
	sudo -u "$app" env PATH=$PATH /opt/rbenv/versions/2.6.0/bin/gem install bundler --no-document
	sudo -u "$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=$PTH RAILS_ENV=production /opt/rbenv/versions/2.6.0/bin/bundle exec rails assets:precompile --quiet
popd

#=================================================
# CREATE MASTODON ADMIN USER
#=================================================
ynh_print_info "Creating Mastodon Admin User..."

# Create user
pushd "$final_path/live"
	sudo -u "$app" env PATH=$PATH RAILS_ENV=production bin/tootctl accounts create '$admin_mastodon' --email='$admin_mastodon_mail' > acc.txt
    sudo -u "$app" env PATH=$PATH RAILS_ENV=production bin/tootctl accounts modify $admin_mastodon --confirm
    sudo -u "$app" env PATH=$PATH RAILS_ENV=production bin/tootctl accounts modify $admin_mastodon --role admin
popd

admin_pass=$( tail -1 $final_path/live/acc.txt | head -1 | cut -c 15- )
ynh_secure_remove "$final_path/live/acc.txt"

#=================================================
# SETUP CRON JOB FOR REMOVING CACHE
#=================================================
ynh_print_info "Setuping a cron job for remiving 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 "Configuring a systemd service..."

### `ynh_systemd_config` is used to configure a systemd script for an app.
### It can be used for apps that use sysvinit (with adaptation) or systemd.
### Have a look at the app to be sure this app needs a systemd script.
### `ynh_systemd_config` will use the file conf/systemd.service
### If you're not using these lines:
###		- You can remove those files in conf/.
###		- Remove the section "BACKUP SYSTEMD" in the backup script
###		- Remove also the section "STOP AND REMOVE SERVICE" in the remove script
###		- As well as the section "RESTORE SYSTEMD" in the restore script
###		- And the section "SETUP SYSTEMD" in the upgrade script

# 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"

systemctl start "$app-web.service" "$app-sidekiq.service" "$app-streaming.service"

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================

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

### For security reason, any app should set the permissions to root: before anything else.
### Then, if write authorization is needed, any access should be given only to directories
### that really need such authorization.

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

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================

# Add service YunoHost
yunohost service add "$app-web"
yunohost service add "$app-sidekiq"
yunohost service add "$app-streaming"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_print_info "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 unprotected_uris "/"
fi

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

systemctl reload nginx

#=================================================
# SEND A README FOR THE ADMIN
#=================================================

message="Mastodon was successfully installed :)
Please open 'https://$domain$path_url'
The admin email is: $admin_mastodon_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 "$message" "$admin_mastodon"

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

ynh_print_info "Installation of $app completed"