#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=2

app=$YNH_APP_INSTANCE_NAME

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

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

upgrade_type=$(ynh_check_app_version_changed)

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

# 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 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

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up Baïkal before upgrading (may take a while)..." --weight=4

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

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

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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=3

	# Keep the Specific and config folders intact: https://sabre.io/baikal/upgrade/
	mkdir -p "$final_path/config"
	temp_folder=$(mktemp -d)
	mv "$final_path/Specific" "$temp_folder"
	mv "$final_path/config" "$temp_folder"
	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"

	ynh_secure_remove --file="$final_path/Specific"
	ynh_secure_remove --file="$final_path/config"

	mv "$temp_folder/Specific" "$final_path"
	mv "$temp_folder/config" "$final_path"
	ynh_secure_remove --file="$temp_folder"
fi

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

# Create a dedicated NGINX config
ynh_add_nginx_config
phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=5

ynh_install_app_dependencies $pkg_dependencies

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

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

#=================================================
# PHP-FPM CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading PHP-FPM configuration..." --weight=2

# Create a dedicated PHP-FPM config
ynh_add_fpm_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPGRADE BAIKAL
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	#=================================================
	# UPGRADE BAIKAL CONFIGURATION
	#=================================================
	ynh_script_progression --message="Upgrading Baïkal configuration..." --weight=2

	bk_conf="${final_path}/config/baikal.yaml"
	ynh_backup_if_checksum_is_different --file="$bk_conf"
	cp ../conf/baikal.yaml "$bk_conf"

	ynh_replace_string --match_string="__TIMEZONE__" --replace_string="$(cat /etc/timezone)" --target_file="$bk_conf"
	password_hash=$(ynh_app_setting_get --app=$app --key=password_hash)
	# If the password_hash is not in the app's config, recreate it from the password.
	if [ -z "$password_hash" ]; then
		password=$(ynh_app_setting_get --app=$app --key=password)
		password_hash=$(echo -n admin:BaikalDAV:$password | md5sum | cut -d ' ' -f 1)
		ynh_app_setting_set --app=$app --key=password_hash --value=$password_hash
	fi
	ynh_replace_string --match_string="__PASSWORDHASH__" --replace_string="${password_hash}" --target_file="$bk_conf"

	ynh_replace_string --match_string="__PATH__" --replace_string="${path_url%/}" --target_file="$bk_conf"
	ynh_replace_string --match_string="__DBNAME__" --replace_string="$db_name" --target_file="$bk_conf"
	ynh_replace_string --match_string="__DBUSER__" --replace_string="$db_name" --target_file="$bk_conf"
	db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
	ynh_replace_string --match_string="__DBPASS__" --replace_string="$db_pwd" --target_file="$bk_conf"

	deskey=$(ynh_app_setting_get --app=$app --key=encrypt_key)
	ynh_app_setting_set --app=$app --key=encrypt_key --value="$deskey"
	ynh_replace_string --match_string="__DESKEY__" --replace_string="$deskey" --target_file="$bk_conf"

	#=================================================
	# UPGRADE BAIKAL
	#=================================================
	ynh_script_progression --message="Upgrading Baïkal..."

	# Run Baikal upgrade
	php"${phpversion}" "${final_path}/bin/upgrade.sh"

	# Cleanup old baikal-admin sessions
	# since we may have changed owner of the session file
	grep --files-with-matches --recursive "CSRF_TOKEN|s:" /var/lib/php/sessions | xargs rm -f

	# Store the config file checksum into the app settings
	ynh_store_file_checksum --file="$bk_conf"
	# Remove checksums of old files
	ynh_delete_file_checksum --file="${final_path}/Specific/config.php"
	ynh_delete_file_checksum --file="${final_path}/Specific/config.system.php"
fi

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

# Set permissions
chown -R root: "$final_path"
chown $app "$final_path/config/baikal.yaml"
chmod 640 "$final_path/config/baikal.yaml"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring SSOwat..." --weight=2

# Upgrade from the legacy permissions system
protected_uris=$(ynh_app_setting_get --app="$app" --key=protected_uris)
if [ -n "${protected_uris}" ]; then
    ynh_app_setting_delete --app="$app" --key=protected_uris

    # Allow public access on /
    ynh_permission_update --permission "main"  --add "visitors"
    # But restrain on /admin
    ynh_permission_create --permission "admin" --url "/admin" --allowed "all_users"
fi

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..."

ynh_systemd_action --service_name=nginx --action=reload

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

ynh_script_progression --message="Upgrade of Baïkal completed" --last