#!/bin/bash

# Define paths and URLs
INSTALL_DIR="/opt/rdtc"
INSTALLED_DIR="$INSTALL_DIR/.installed"
INSTALLED_FILE="$INSTALLED_DIR/version.txt"
BACKUP_DIR="$INSTALL_DIR/.backup"
GITHUB_API_URL="https://api.github.com/repos/rogerfar/rdt-client/releases/latest"
DOWNLOAD_URL=$(curl -s "$GITHUB_API_URL" | jq -r '.assets[0].browser_download_url')

# Function to check if a newer version is available
check_for_update() {
    local current_version
    if [ -f "$INSTALLED_FILE" ]; then
        current_version=$(cat "$INSTALLED_FILE")		
    else
		mkdir -p $INSTALLED_DIR
        current_version="0.0.0"
    fi

    latest_version=$(curl -s "$GITHUB_API_URL" | jq -r '.name' | tr -d v)

	if [[ "$1" == "-force" ]]; then
            update
	fi
	
	if [[ "$current_version" == "$latest_version" ]]; then
        echo "The installed version ($current_version) is up to date."
    else
        echo "A newer version ($latest_version) is available."
        if [[ "$1" == "-update" ]]; then
            update
        elif [[ "$1" == "-check" ]]; then
            read -p "Do you want to update? (Y/n): " choice
            case "$choice" in
                [Yy]*)
                    update
                    ;;
                *)
                    echo "Update canceled."
                    ;;
            esac
        fi
    fi
}

# Function to update the software
update() {
    echo "Updating RealDebridClient..."
    
    # Download the latest zip file
	echo "Downloading Lastest RealDebridClient"
    curl -sLO "$DOWNLOAD_URL"
    
    # Stop the rdtc service
	echo "Stopping RealDebridClient"
    sudo systemctl stop rdtc
    
	echo "Backing up RealDebridClient"
	cp $INSTALL_DIR/appsettings.json $BACKUP_DIR
	cp -r $INSTALL_DIR/db $BACKUP_DIR
	
    # Unzip the downloaded file
	echo "Unzipping RealDebridClient.zip"
    unzip -q -o RealDebridClient.zip -d "$INSTALL_DIR"
    
    # Store the new version in the installed file
	echo "Updating Latest Version file"
    echo "$latest_version" > "$INSTALLED_FILE"
	
	echo "Restoring Backup"
	cp $BACKUP_DIR/appsettings.json $INSTALL_DIR
	cp -r $BACKUP_DIR/db $INSTALL_DIR
    
    # Start the rdtc service
	echo "Starting RealDebridClient"
    sudo systemctl start rdtc
    
    echo "Update complete."
}

# Main script
case "$1" in
    "-update")
        check_for_update "-update"
        ;;
    "-force")
        update
        ;;
    "-check")
        check_for_update "-check"
        ;;
	"")
		check_for_update "-update"
        ;;
    *)
        echo "Usage: $0 {-update|-force|-check}"
        exit 1
        ;;
esac

exit 0