#!/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_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)
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
#=================================================
ynh_script_progression --message="Checking version..."

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# 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 () {
	# 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 wikijs service"

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

# If ldap_user doesn't exist, retrieve it or create it
if [[ -z "$ldap_user" ]]; then
	ldap_user="svc_${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 "SvcWikijsLdap" --lastname "SvcWikijsLdap" --mail ${ldap_user}@$domain --password $ldap_password -q 0
fi

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

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

# Install pg_trgm extension to provide a PostgreSQL search solution
ynh_psql_test_if_first_run
ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS pg_trgm;" --database=$db_name

# 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 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"

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

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

	config_file="$final_path/config.yml"
	tmpdir="$(mktemp -d)"

	rsync -a "$config_file" "$tmpdir/."
	if [ -d "$final_path/.ssh" ]; then
		rsync -a "$final_path/.ssh" "$tmpdir/."
	fi
	if [ -d "$final_path/data" ]; then
		rsync -a "$final_path/data" "$tmpdir/."
	fi
	ynh_secure_remove --file="$final_path"

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

	rsync -a "$tmpdir/config.yml" "$final_path/."
	if [ -d "$tmpdir/.ssh" ]; then
		rsync -a "$tmpdir/.ssh" "$final_path/."
	fi
	if [ -d "$tmpdir/data" ]; then
		rsync -a "$tmpdir/data" "$final_path/."
	fi
fi

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:$app "$final_path"

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

# Create a dedicated NGINX config
ynh_add_nginx_config

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

ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
ynh_use_nodejs
ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a config file..."

ynh_add_config --template="../conf/config.sample.yml" --destination="$final_path/config.yml"

chmod 400 "$final_path/config.yml"
chown $app:$app "$final_path/config.yml"

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

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

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

yunohost service add $app --description="$app daemon for Wiki.js" --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="HTTP Server:"

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

ynh_systemd_action --service_name=nginx --action=reload

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

ynh_add_config --template="../conf/ldap_message" --destination="../conf/message_upgrade"
ynh_send_readme_to_admin --app_message="../conf/message_upgrade" --recipients="root" --type='upgrade'

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

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