using UnityEngine;
using UnityEngine.SceneManagement;
using SVSBluetooth;

public class MenuInterface : MonoBehaviour {

    public string MY_UUID; // UUID string that is set through the inspector
    string role;
    public GameObject MultiplayerPanel;
    public GameObject WaitPanel;
    public GameObject turnOnBluetoothText;
    public GameObject failConnectionText;
    public GameObject waitConnectionImage;
    public GameObject waitConnectionCancelButton;

    // comments for operations of the same type will not be repeated
    // event subscription
    // for information on the appointment of events, see the Documentation.pdf
    private void OnEnable() {
        BluetoothForAndroid.BtAdapterEnabled += HideTurnOnBluetoothText;
        BluetoothForAndroid.DeviceConnected += LoadGameScene;
        BluetoothForAndroid.ServerStarted += OpenWaitConnectionWindow;
        BluetoothForAndroid.AttemptConnectToServer += OpenWaitConnectionWindow;
        BluetoothForAndroid.FailConnectToServer += FailConnect;
    }
    // unsubscribe from events
    private void OnDisable() {
        BluetoothForAndroid.BtAdapterEnabled -= HideTurnOnBluetoothText;
        BluetoothForAndroid.DeviceConnected -= LoadGameScene;
        BluetoothForAndroid.ServerStarted -= OpenWaitConnectionWindow;
        BluetoothForAndroid.AttemptConnectToServer -= OpenWaitConnectionWindow;
        BluetoothForAndroid.FailConnectToServer -= FailConnect;
    }

    private void Start() {
        Screen.sleepTimeout = SleepTimeout.NeverSleep; // so that the screen does not go out
        BluetoothForAndroid.Initialize(); // plugin initialization
    }

    public void ExitGame() {
        Application.Quit(); // close application
    }
    public void OpenMultiplayerWindow() {
        if (!BluetoothForAndroid.IsBTEnabled()) BluetoothForAndroid.EnableBT(); // command to turn on the bluetooth if the bluetooth adapter is not activated
        MultiplayerPanel.SetActive(true); // opening the connection window
    }
    public void CloseMultiplayerWindow() {
        MultiplayerPanel.SetActive(false);// close the connection window
    }
    public void StarServer() {
        role = "server"; // a flag that activates or deactivates the cancel button on the connection standby screen
        if (BluetoothForAndroid.IsBTEnabled()) {
            turnOnBluetoothText.SetActive(false);
            BluetoothForAndroid.CreateServer(MY_UUID); // create a server with the specified UUID
        }
        else turnOnBluetoothText.SetActive(true); // if bluetooth is off, a message is displayed asking you to turn on bluetooth
    }
    public void ConnectToServer() {
        role = "client";
        if (BluetoothForAndroid.IsBTEnabled()) {
            turnOnBluetoothText.SetActive(false);
            BluetoothForAndroid.ConnectToServer(MY_UUID); // connect to server with specified UUID
        }
        else turnOnBluetoothText.SetActive(true);
    }
    private void HideTurnOnBluetoothText() {
        turnOnBluetoothText.SetActive(false);
    }
    private void OpenWaitConnectionWindow() {
        waitConnectionImage.SetActive(true); // turning on animation
        WaitPanel.SetActive(true);
        failConnectionText.SetActive(false);
        if (role == "server") waitConnectionCancelButton.SetActive(true);        
        else waitConnectionCancelButton.SetActive(false);
    }
    private void FailConnect() {
        waitConnectionImage.SetActive(false);
        waitConnectionCancelButton.SetActive(true);
        failConnectionText.SetActive(true);
    }
    public void CloseWaitConnectionWindow() {
        if (role == "server") BluetoothForAndroid.StopServer(); // server shutdown
        WaitPanel.SetActive(false);
    }

    void LoadGameScene() {
        SceneManager.LoadScene(1); // loading the game scene
    }
}