#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --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)
admin=$(ynh_app_setting_get --app=$app --key=admin)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)

admin_token=$(ynh_app_setting_get --app=$app --key=admin_token)
rocket_port=$(ynh_app_setting_get --app=$app --key=rocket_port)
websocket_port=$(ynh_app_setting_get --app=$app --key=websocket_port)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..."

upgrade_type=$(ynh_check_app_version_changed)

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

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

	ynh_app_setting_delete --app=$app --key=is_public
fi

# Create a permission if needed
if ! ynh_permission_exists --permission="api"; then
	ynh_permission_create --permission="api" --url="/api" --additional_urls="/identity/connect/token" --allowed="visitors" --auth_header="false" --show_tile="false" --protected="true"
fi

if ! ynh_permission_exists --permission="admin"; then
	ynh_permission_create --permission="admin" --url="/admin" --allowed="$admin" --show_tile="false"
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --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 () {
	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
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..."

ynh_systemd_action --service_name=$app --action="stop" --log_path="systemd" --line_match="Stopped Bitwarden Server"

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

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

	# Download, check integrity, uncompress the source of bitwarden_rs from app.src to his build directory
	ynh_setup_source --dest_dir="$final_path/build/" --source_id="app"

	# Download, check integrity, uncompress and patch the source from web.src
	ynh_setup_source --dest_dir="$final_path/live/web-vault/" --source_id="web"
fi

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

# Create a dedicated NGINX config
ynh_add_nginx_config "websocket_port rocket_port"

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

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=$app --home_dir="$final_path"

#=================================================
# SPECIFIC UPGRADE
#=================================================
# MAKE UPGRADE
#=================================================
ynh_script_progression --message="Making upgrade..."

# Set right permissions 
chown -R "$app":"$app" "$final_path"

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	# Install rustup with the toolchain needed by bitwarden_rs
	pushd "$final_path"
		sudo -u "$app" RUSTUP_HOME="$final_path"/.rustup CARGO_HOME="$final_path"/.cargo bash -c 'curl -sSf -L https://static.rust-lang.org/rustup.sh | sh -s -- -y --default-toolchain nightly'
	popd

	export PATH="$PATH:$final_path/.cargo/bin:$final_path/.local/bin:/usr/local/sbin" 

	# Compile bitwarden_rs
	pushd "$final_path"/build
		sudo -u "$app" env PATH="$PATH" cargo build --features sqlite --release
	popd

	# Remove old generated files before copying the new ones
	ynh_secure_remove --file="$final_path/live/build"
	ynh_secure_remove --file="$final_path/live/deps"
	ynh_secure_remove --file="$final_path/live/.fingerprint"

	# Install bitwarden_rs
	cp -af "$final_path"/build/target/release/. "$final_path"/live/.

	# Remove build files and rustup
	ynh_secure_remove --file="$final_path/build"
	ynh_secure_remove --file="$final_path/.cargo"
	ynh_secure_remove --file="$final_path/.rustup"
fi

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

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# MODIFY A CONFIG FILE
#=================================================
ynh_script_progression --message="Modifying a config file..."

config="$final_path/live/bitwarden_rs.env"

ynh_backup_if_checksum_is_different --file="$config"

cp -f ../conf/bitwarden_rs.env "$config"

ynh_replace_string --match_string="__ADMIN_TOKEN__" --replace_string="$admin_token" --target_file="$config"
ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$config"
ynh_replace_string --match_string="__PATH_URL__" --replace_string="$path_url" --target_file="$config"
ynh_replace_string --match_string="__WEBSOCKET_PORT__" --replace_string="$websocket_port" --target_file="$config"
ynh_replace_string --match_string="__ROCKET_PORT__" --replace_string="$rocket_port" --target_file="$config"
ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file="$config"

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================
ynh_script_progression --message="Storing the config file checksum..."

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

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================
ynh_script_progression --message="Securing files and directories..."

# Set permissions on app files
chown -R "$app":"$app" "$final_path"
mkdir -p "/var/log/$app"
chown -R "$app":"$app" /var/log/"$app"

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..."

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

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..."

yunohost service add $app --description "$app daemon for Bitwarden" --log "/var/log/$app/$app.log"

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

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Rocket has launched from" --length=100

#=================================================
# UPGRADE FAIL2BAN
#=================================================
ynh_script_progression --message="Reconfiguring Fail2Ban..."

# Create a dedicated Fail2Ban config
ynh_add_fail2ban_config --logpath="/var/log/$app/$app.log" --failregex="^.*Username or password is incorrect\. Try again\. IP: <HOST>\. Username:.*$"

#=================================================
# 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 $app completed"