#!/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=1

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)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
language=$(ynh_app_setting_get --app=$app --key=language)
port=$(ynh_app_setting_get --app=$app --key=port)
password=$(ynh_app_setting_get --app=$app --key=password)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)

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

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=2

# 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

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up Etherpad before upgrading (may take a while)..." --weight=1

# 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=42

ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=1

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

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=3

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=12

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

ynh_install_nodejs --nodejs_version=$nodejs_version

#=================================================
# 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

#=================================================
# INSTALL ETHERPAD
#=================================================
ynh_script_progression --message="Installing Etherpad..." --weight=90

chown -R $app: $final_path

pushd "$final_path" || ynh_die
 	ynh_use_nodejs
 	ynh_exec_as $app env $ynh_node_load_PATH bin/installDeps.sh
popd || ynh_die 

#=================================================
# MODIFY A CONFIG FILE
#=================================================
ynh_script_progression --message="Reconfiguring Etherpad..." --weight=6

cp ../conf/settings.json $final_path/settings.json

ynh_replace_string --match_string="__PORT__"     --replace_string="$port"     --target_file="$final_path/settings.json"
ynh_replace_string --match_string="__LANGUAGE__" --replace_string="$language" --target_file="$final_path/settings.json"

cp ../conf/credentials.json $final_path/credentials.json

ynh_replace_string --match_string="__DB_NAME__"  --replace_string="$db_name"  --target_file="$final_path/credentials.json"
ynh_replace_string --match_string="__DB_PWD__"   --replace_string="$db_pwd"   --target_file="$final_path/credentials.json"
ynh_replace_string --match_string="__ADMIN__"    --replace_string="$admin"    --target_file="$final_path/credentials.json"
ynh_replace_string --match_string="__PASSWORD__" --replace_string="$password" --target_file="$final_path/credentials.json"

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

# Set permissions on app files
chown -R $app: $final_path
chmod 600 $final_path/credentials.json

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=2

# Create a dedicated systemd config
ynh_add_systemd_config --others_var="ynh_node_load_PATH"

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

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

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=6

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Your Etherpad version is" --timeout="60"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=2

ynh_systemd_action --service_name=nginx --action=reload

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

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