#!/bin/bash

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

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

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

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get $app domain)
path_url="/"
admin=$(ynh_app_setting_get $app admin)
is_public=$(ynh_app_setting_get $app is_public)
final_path=$(ynh_app_setting_get $app final_path)
db_name=$(ynh_app_setting_get "$app" db_name)
admin_email=$(ynh_app_setting_get "$app" admin_email)
random_key=$(ynh_app_setting_get "$app" random_key)
name=$(ynh_app_setting_get "$app" name)
port=$(ynh_app_setting_get "$app" port)
db_pwd=$(ynh_app_setting_get "$app" db_pwd)
cache=$(ynh_app_setting_get "$app" cache)
size=$(ynh_app_setting_get "$app" size)
registration=$(ynh_app_setting_get "$app" registration)

psql_db=$(ynh_app_setting_get "$app" psql_db)

if [ -n "$psql_db" ]
then
    db_name=$(ynh_app_setting_get "$app" psql_db)
    db_pwd=$(ynh_app_setting_get "$app" psqlpwd)
    ynh_app_setting_set "$app" db_name "$db_name"
    ynh_app_setting_set "$app" db_pwd "$db_pwd"
	ynh_app_setting_delete "$app" psql_db
	ynh_app_setting_delete "$app" psqlpwd
fi

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

# Fix is_public as a boolean value
if [ "$is_public" = "Yes" ]; then
	ynh_app_setting_set $app is_public 1
	is_public=1
elif [ "$is_public" = "No" ]; then
	ynh_app_setting_set $app is_public 0
	is_public=0
fi

# 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

# Remove repository
ynh_secure_remove "/etc/apt/sources.list.d/erlang-solutions.list"

#=================================================
# 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
	ynh_clean_check_starting
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STOP SERVICE
#=================================================

ynh_systemd_action --action=stop --service_name=$app

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

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

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

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

git clone --quiet https://git.pleroma.social/pleroma/pleroma "$final_path/upgrade"
pushd "$final_path/upgrade"
	git checkout -b master
popd
cp -a "$final_path/upgrade/." "$final_path/$app/."
rm -r "$final_path/upgrade"

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

# Create a dedicated nginx config
ynh_add_nginx_config

ynh_secure_remove /etc/nginx/conf.d/$app-cache.conf
if [ $cache -eq 1 ]
then
	cp -rf "../conf/cache.conf" "/etc/nginx/conf.d/$app-cache.conf"
	ynh_replace_string "{APP}"    "$app"  "/etc/nginx/conf.d/$app-cache.conf"
	ynh_replace_string "__SIZE__" "$size" "/etc/nginx/conf.d/$app-cache.conf"
	ynh_store_file_checksum "/etc/nginx/conf.d/$app-cache.conf"
	ynh_replace_string  "{APP}"     "$app"  "../conf/media.conf"
	ynh_replace_string  "__PORT__"  "$port" "../conf/media.conf"
	sudo su -c "cat ../conf/media.conf >> /etc/nginx/conf.d/$domain.d/$app.conf"
	ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"
fi

#=================================================
# INSTALL ERLANG and ELIXIR
#=================================================
ynh_print_info "Installing erlang and elixir ..."

if [ "$(lsb_release --codename --short)" == "jessie" ]; then
	sudo apt install -y ../conf/esl-erlang_21.2.6-1~debian~jessie_amd64.deb
	sudo apt install -y ../conf/elixir_1.8.1-2~debian~jessie_amd64.deb
elif 
	[ "$(lsb_release --codename --short)" == "stretch" ]; then
	sudo apt install -y ../conf/esl-erlang_21.2.6-1~debian~stretch_amd64.deb
	sudo apt install -y ../conf/elixir_1.8.1-2~debian~stretch_amd64.deb
fi

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

# install dependencies
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 "$app" "$final_path"

#=================================================
# PHP-FPM CONFIGURATION
#=================================================
ynh_print_info "Upgrading php-fpm configuration..."

# Create a dedicated php-fpm config
#ynh_add_fpm_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# MODIFY A CONFIG FILE
#=================================================

cp -f ../conf/generated_config.exs "$final_path/$app/config/prod.secret.exs"

ynh_replace_string "__DOMAIN__"        "$domain"        "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__KEY__"           "$random_key"    "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__INSTANCE_NAME__" "$name"          "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__DB_NAME__"       "$db_name"           "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__DB_PWD__"        "$db_pwd"        "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__ADMIN_EMAIL__"   "$admin_email"   "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__PORT__"          "$port"          "$final_path/$app/config/prod.secret.exs"

if [ $cache -eq 1 ]
then
	ynh_replace_string "__MEDIA_CACHE__"    "true"        "$final_path/$app/config/prod.secret.exs"
else
	ynh_replace_string "__MEDIA_CACHE__"    "false"        "$final_path/$app/config/prod.secret.exs"
fi

#  Set registrations open/closed
if [ $registration -eq 1 ]
then
 ynh_replace_string "__REG__" "true"  "$final_path/$app/config/prod.secret.exs"
else
 ynh_replace_string "__REG__" "false" "$final_path/$app/config/prod.secret.exs"
fi

#=================================================
# MAKE UPGRADE
#=================================================

# Give permission to the final_path
chown -R "$app":"$app" "$final_path"
pushd $final_path/$app
    sudo -u "$app" MIX_ENV=prod mix deps.get
    sudo -u "$app" MIX_ENV=prod mix ecto.migrate --force
	
	#Generate key pair
    sudo -u "$app" MIX_ENV=prod mix web_push.gen.keypair >> "config/prod.secret.exs"
	ynh_replace_string "administrator@example.com" "$admin_email" "$final_path/$app/config/prod.secret.exs" 
popd

### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.
ynh_backup_if_checksum_is_different "$final_path/$app/config/prod.secret.exs"
# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum "$final_path/$app/config/prod.secret.exs"

#=================================================
# CLOSE A PORT
#=================================================

if yunohost firewall list | grep -q "\- $port$"
then
	echo "Close port $port" >&2
	yunohost firewall disallow TCP $port 2>&1
fi

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_print_info "Upgrading logrotate configuration..."

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append

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

# Create a dedicated systemd config
ynh_add_systemd_config

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

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

#=================================================
# START SERVICE
#=================================================

ynh_systemd_action --action=start --service_name=$app --log_path=systemd --line_match="Running Pleroma.Web.Endpoint"
sleep 10

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

ynh_print_info "Upgrade of $app completed"