#!/bin/bash

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

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

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

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get $app domain)
path_url=$(ynh_app_setting_get $app path)
is_public=$(ynh_app_setting_get $app is_public)
port=$(ynh_app_setting_get $app port)
final_path=$(ynh_app_setting_get $app final_path)
secret=$(ynh_app_setting_get $app secret)
db_name=$(ynh_app_setting_get $app db_name)
db_user=$db_name
db_pwd=$(ynh_app_setting_get $app psqlpwd)
theme=$(ynh_app_setting_get $app theme)
hashed_password=$(ynh_app_setting_get $app hashed_password)

#=================================================
# FIX OLD THINGS
#=================================================
ynh_print_info "Ensuring downward compatibility..."

if [ "$is_public" = "Yes" ]; then
	ynh_app_setting_set $app is_public 1	# Fixe is_public en booléen
	is_public=1
elif [ "$is_public" = "No" ]; then
	ynh_app_setting_set $app is_public 0
	is_public=0
fi

if [ "${#final_path}" -eq 0 ]
then	# Si final_path n'est pas renseigné dans la config yunohost, cas d'ancien script, code final_path en dur
	final_path=/var/www/$app
fi

if [ -z "$db_pwd" ]; then
	db_pwd=$(ynh_app_setting_get $app db_pwd)	# Fix old db_pwd
	if [ -z "$db_pwd" ]; then
		db_name=$(ynh_sanitize_dbid "$app")
		db_user=$db_name
		# Initialize database and store postgres password for upgrade
		ynh_psql_setup_db "$db_name" "$db_user"
		ynh_app_setting_set "$app" db_name "$db_name"
		db_pwd=$(ynh_app_setting_get $app psqlpwd) # Password created in ynh_psql_setup_db function
	else
		ynh_app_setting_delete $app db_pwd
		ynh_app_setting_set $app psqlpwd $db_pwd
	fi
fi

if [ -z "$theme" ]; then
	theme="milligram"
	ynh_app_setting_set $app theme $theme
fi

if [ -z "$hashed_password" ]; then
	# Generate random password
	password=$(ynh_string_random 8)
	hashed_password=$(echo -n $password | sha256sum | cut -d' ' -f1)

	echo "The new version of LSTU provide an admin and a stats area which required a password." > mail_to_send
	echo "" >> mail_to_send
	echo "This password is: $password" >> mail_to_send

	ynh_send_readme_to_admin --app_message="mail_to_send" --type="upgrade"
	
	ynh_app_setting_set $app hashed_password $hashed_password
fi

#=================================================
# 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 () {
	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

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

ynh_install_app_dependencies build-essential libssl-dev zlib1g-dev libpng-dev libpq-dev memcached postgresql cpanminus

ynh_setup_source "$final_path"

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

# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_print_info "Making sure dedicated system user exists..."

# Create a dedicated user (if not existing)
ynh_system_user_create $app

#=================================================
# SPECIFIC UPGRADE
#=================================================
# SETUP LSTU
#=================================================
ynh_print_info "Upgrading lstu configuration..."

ynh_backup_if_checksum_is_different "$final_path/lstu.conf"
cp ../conf/lstu.conf.template "${final_path}/lstu.conf"
ynh_replace_string "__DOMAIN__" "$domain" "${final_path}/lstu.conf"
ynh_replace_string "__PATH__" "$path_url" "${final_path}/lstu.conf"
ynh_replace_string "__PORT__" "$port" "${final_path}/lstu.conf"
ynh_replace_string "__DB_NAME__" "$db_name"  "${final_path}/lstu.conf"
ynh_replace_string "__DB_USER__" "$db_user"  "${final_path}/lstu.conf"
ynh_replace_string "__DB_PWD__" "$db_pwd" "${final_path}/lstu.conf"
ynh_replace_string "__SELECTED_THEME__" "$theme" "${final_path}/lstu.conf"
ynh_replace_string "__PASSWORD_HASHED__" "$hashed_password" "${final_path}/lstu.conf"

ynh_replace_string "__SECRET__" "$secret" "${final_path}/lstu.conf"
if [ $is_public -eq 0 ];
then
	ynh_replace_string "__IS_PUBLIC__" "" "${final_path}/lstu.conf"
else
	ynh_replace_string "__IS_PUBLIC__" "#" "${final_path}/lstu.conf"
fi
ynh_store_file_checksum "${final_path}/lstu.conf"

#=================================================
# SECURING FILES AND DIRECTORIES
#=================================================

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

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

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# Install lstu's dependencies via carton
#=================================================

pushd $final_path
carton install --deployment --without=sqlite --without=mysql
popd

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

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

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

yunohost service add $app --log "/var/log/$app.log"

#=================================================
# RESTART LSTU
#=================================================

ynh_systemd_action -n $app -a reload -l "Reloaded Shortened URLs service." -p "systemd"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_print_info "Upgrading SSOwat configuration..."

# Make app public or private
ynh_app_setting_set $app unprotected_uris "/"
if [ $is_public -eq 0 ];
then	# If the app is private, only the shortened URLs are publics
	ynh_app_setting_set $app protected_regex "/login$","/logout$","/api$","/extensions$","/stats$","/d/.*$","/a$","/$"
else
	ynh_app_setting_delete $app protected_regex
fi

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

systemctl reload nginx
yunohost app ssowatconf

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

ynh_print_info "Upgrade of $app completed"