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

project_name=$(ynh_app_setting_get --app=$app --key=project_name)
contact_url=$(ynh_app_setting_get --app=$app --key=contact_url)
logo=$(ynh_app_setting_get --app=$app --key=logo)
favicon=$(ynh_app_setting_get --app=$app --key=favicon)
publishable_key=$(ynh_app_setting_get --app=$app --key=publishable_key)
secret_key=$(ynh_app_setting_get --app=$app --key=secret_key)
prices=$(ynh_app_setting_get --app=$app --key=prices)
secret=$(ynh_app_setting_get --app=$app --key=secret)
csrf_key=$(ynh_app_setting_get --app=$app --key=csrf_key)

#=================================================
# 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..." --weight=1

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app 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=1

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

#=================================================
# 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=1

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=1

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# 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=$app --home_dir="$final_path"

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPGRADE PYTHON DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing Python dependencies..."

pushd $final_path
	python3 -m venv venv
	venv/bin/pip install --upgrade pip
	venv/bin/pip install -r requirements.txt
	venv/bin/pip install gunicorn
	mkdir -p /var/log/$app
	chown -R $app:www-data /var/log/$app
	cat <<EOF >> wsgi.py 
from server import app

if __name__ == "__main__":
    app.run()
EOF
popd

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config

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

ynh_add_config --template="../conf/gunicorn.py" --destination="$final_path/gunicorn.py"
ynh_add_config --template="../conf/settings.py" --destination="$final_path/settings.py"

for price in $(echo $prices | sed "s/,/ /"); do
    frequency=$(echo $price | cut -d/ -f1)
    currency=$(echo $price | cut -d/ -f2)
    price_id=$(echo $price | cut -d/ -f3)
    echo "DONATION['$frequency']['$currency'] = '$price_id'" >> "$final_path/settings.py"
done

ynh_store_file_checksum --file="$final_path/settings.py"

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

# Set permissions on app files
chown -R $app:www-data $final_path
chmod o=--- $final_path

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1

yunohost service add $app --description="A simple donation form" --log_type="systemd"

#=================================================
# 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="Started"

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