#!/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=$(ynh_app_setting_get --app=$app --key=db_user)
db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)

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

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up $app before upgrading (may take a while)..." --weight=120

# 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=160

	# 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

#=================================================
# SPECIFIC UPGRADE
#=================================================
# 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"

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

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

#=================================================
# 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=18

# 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"

ynh_exec_warn_less ynh_install_nodejs --nodejs_version="$nodejs_version"

ynh_install_app_dependencies $pkg_dependencies

#==============================================
# INSTALL CODIMD
#==============================================
if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Building $app... (this will take some time and resources!)" --weight=160

	pushd "$final_path"

	yarn install --frozen-lockfile && ynh_exec_warn_less yarn run build

	popd 
fi

#=================================================
# 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
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..." --weight=2

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

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

ynh_replace_string --match_string="__APP__"       --replace_string="$app"         --target_file="../conf/systemd.service"
ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path"  --target_file="../conf/systemd.service"
ynh_replace_string --match_string="__ENV_PATH__"  --replace_string="$PATH"        --target_file="../conf/systemd.service"
ynh_replace_string --match_string="__NODE__"      --replace_string="$nodejs_path" --target_file="../conf/systemd.service"

ynh_add_systemd_config

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

#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

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

#=================================================
# 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 $app completed" --last