#!/bin/bash

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

source _common.sh
source ynh_send_readme_to_admin__2
source /usr/share/yunohost/helpers

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

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)

is_public=$(ynh_app_setting_get --app=$app --key=is_public)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)

db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)
port=$(ynh_app_setting_get --app=$app --key=port)
ldap_user=$(ynh_app_setting_get --app=$app --key=ldap_user)
ldap_password=$(ynh_app_setting_get --app=$app --key=ldap_password)

#=================================================
# CHECK VERSION
#=================================================

upgrade_type=$(ynh_check_app_version_changed)

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

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

# If db_name doesn't exist, create it
if [ -z "$db_name" ]; then
	db_name=$(ynh_sanitize_dbid --db_name=$app)
	ynh_app_setting_set --app=$app --key=db_name --value=$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=$app --key=final_path --value=$final_path
fi

# If ldap_user doesn't exist, retrieve it or create it
if [[ -z "$ldap_user" ]]; then
	ldap_user="${app}_ldap"
	ldap_password=$(ynh_string_random --length=8)
	ynh_app_setting_set "$app" ldap_user "$ldap_user"
	ynh_app_setting_set "$app" ldap_password "$ldap_password"
	yunohost user create $ldap_user --firstname $app --lastname $app --mail ${ldap_user}@$domain --password $ldap_password -q 0
fi

# Remove yarn repository
ynh_secure_remove --file="/etc/apt/sources.list.d/yarn.list"

# Remove old log file
ynh_secure_remove --file="/var/log/$app/"

# Create PostgreSQL User
ynh_psql_create_user $db_name $db_pwd

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_print_info --message="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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_print_info --message="Stopping a systemd service..."

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

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_print_info --message="Upgrading source files..."

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

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

# Create a dedicated nginx config
ynh_add_nginx_config

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

ynh_install_nodejs --nodejs_version="10"

ynh_install_app_dependencies $pkg_dependencies

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

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app --home_dir="$final_path"

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

config_file="$final_path/config.yml"
ynh_backup_if_checksum_is_different --file=$config_file
cp -f ../conf/config.sample.yml $config_file

ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file=$config_file
ynh_replace_string --match_string="__DB_PWD__" --replace_string="$db_pwd" --target_file=$config_file
ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name" --target_file=$config_file

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

# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file=$config_file

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

# Create a dedicated systemd config
ynh_replace_string --match_string="__NODEJS_PATH__" --replace_string="$nodejs_path" --target_file="../conf/systemd.service"
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 --message="Upgrading SSOwat configuration..."

# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# unprotected_uris allows SSO credentials to be passed anyway
	ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"
fi

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

ynh_systemd_action --service_name=$app --action="start" --log_path=systemd

sleep 30

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

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# SEND README TO ADMIN
#=================================================
ynh_print_info --message="Sending ReadMe to admin..."

ynh_replace_string --match_string="__LDAP_USER__"    --replace_string="$ldap_user"    --target_file="../conf/ldap_message"
ynh_replace_string --match_string="__LDAP_PASSWORD__"    --replace_string="$ldap_password"    --target_file="../conf/ldap_message"
ynh_replace_string --match_string="__DOMAIN__"    --replace_string="$domain"    --target_file="../conf/ldap_message"
ynh_replace_string --match_string="__PATH_URL__"    --replace_string="$path_url"    --target_file="../conf/ldap_message"

ynh_send_readme_to_admin --app_message="../conf/ldap_message" --recipients="root" --type='upgrade'

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

ynh_print_info --message="Upgrade of $app completed"