#!/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)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
port=$(ynh_app_setting_get --app=$app --key=port)

db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name
db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..." --weight=2

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up HedgeDoc before upgrading (may take a while)..." --weight=10

# 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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=1

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

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=10

	# Create a temporary directory
	tmpdir="$(mktemp -d)"
	
	# Backup the config file in the temp dir
	cp -a "$final_path/config.json" "$tmpdir/config.json"
	cp -a "$final_path/.sequelizerc" "$tmpdir/.sequelizerc"
	
	# Remove the app directory securely
	ynh_secure_remove --file=$final_path

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

	#Copy the admin saved settings from tmp directory to final path	
	cp -a "$tmpdir/config.json" "$final_path/config.json" 
	cp -a "$tmpdir/.sequelizerc" "$final_path/.sequelizerc"

	# Remove the tmp directory securely
	ynh_secure_remove --file="$tmpdir"
fi

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=2

# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=10

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

# Install Nodejs
ynh_exec_warn_less ynh_install_nodejs --nodejs_version=$nodejs_version

# Install Yarn
ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1

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

#=================================================
# SPECIFIC UPGRADE
#==============================================
# INSTALL HEDGEDOC
#==============================================
if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Building HedgeDoc... (this will take some time and resources!)" --weight=20

	pushd "$final_path" || ynh_die
		ynh_use_nodejs
		bin/setup
	popd || ynh_die
fi

#=================================================
# MODIFY A CONFIG FILE
#=================================================
ynh_script_progression --message="Modifying a config file..." --weight=2

ynh_backup_if_checksum_is_different --file="$final_path/config.json"

cp ../conf/config.json.example "$final_path/config.json"

# Main config File
ynh_replace_string --match_string="__PORT__"    --replace_string="$port"     --target_file="$final_path/config.json"
ynh_replace_string --match_string="__DOMAIN__"  --replace_string="$domain"   --target_file="$final_path/config.json"
ynh_replace_string --match_string="__PATH__"    --replace_string="${path_url:1}" --target_file="$final_path/config.json"
ynh_replace_string --match_string="__DB_USER__" --replace_string="$db_user"  --target_file="$final_path/config.json"
ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name"  --target_file="$final_path/config.json"
ynh_replace_string --match_string="__DB_PASS__" --replace_string="$db_pwd"   --target_file="$final_path/config.json"
ynh_replace_string --match_string="__APP__"     --replace_string="$app"      --target_file="$final_path/config.json"

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

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..." --weight=2

ynh_replace_string --match_string="__ENV_PATH__" --replace_string="$PATH"    --target_file="../conf/systemd.service"
ynh_replace_string --match_string="__YNH_NPM__"  --replace_string="$ynh_npm" --target_file="../conf/systemd.service"

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================
ynh_script_progression --message="Securing files and directories..." --weight=1

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

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=2

yunohost service add $app --description="Collaborative Markdown editor" --log="/var/log/$app/$app.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="HTTP Server listening"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=1

ynh_systemd_action --service_name=nginx --action=reload

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

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