using System;
using UnityEngine;

public class UniAndroidPermission : MonoBehaviour
{
    const string PackageName = "net.sanukin.PermissionManager";

    static Action onAllowCallback;
    static Action onDenyCallback;
    static Action onDenyAndNeverAskAgainCallback;

    void Awake()
    {
        DontDestroyOnLoad(gameObject);
    }

    public static bool IsPermitted(AndroidPermission permission)
    {
#if !UNITY_EDITOR && UNITY_ANDROID
        using (var permissionManager = new AndroidJavaClass(PackageName))
        {
            return permissionManager.CallStatic<bool>("hasPermission", GetPermittionStr(permission));
        }
#else
        return true;
#endif
    }

    public static void RequestPermission(AndroidPermission permission, Action onAllow = null, Action onDeny = null, Action onDenyAndNeverAskAgain = null)
    {
#if !UNITY_EDITOR && UNITY_ANDROID
        using (var permissionManager = new AndroidJavaClass(PackageName))
        {
            permissionManager.CallStatic("requestPermission", GetPermittionStr(permission));
            onAllowCallback = onAllow;
            onDenyCallback = onDeny;
            onDenyAndNeverAskAgainCallback = onDenyAndNeverAskAgain;
        }
#else
        Debug.LogWarning("UniAndroidPermission works only Androud Devices.");
#endif
    }

    private static string GetPermittionStr(AndroidPermission permittion)
    {
        return "android.permission." + permittion.ToString();
    }

    private void OnAllow()
    {
        if (onAllowCallback != null)
        {
            onAllowCallback();
        }
        ResetAllCallBacks();
    }

    private void OnDeny()
    {
        if (onDenyCallback != null)
        {
            onDenyCallback();
        }
        ResetAllCallBacks();
    }

    private void OnDenyAndNeverAskAgain()
    {
        if (onDenyAndNeverAskAgainCallback != null)
        {
            onDenyAndNeverAskAgainCallback();
        }
        ResetAllCallBacks();
    }

    private void ResetAllCallBacks(){
        onAllowCallback = null;
        onDenyCallback = null;
        onDenyAndNeverAskAgainCallback = null;
    }
}

// Protection level: dangerous permissions 2015/11/25
// http://developer.android.com/intl/ja/reference/android/Manifest.permission.html
public enum AndroidPermission
{
    ACCESS_COARSE_LOCATION,
    ACCESS_FINE_LOCATION,
    ADD_VOICEMAIL,
    BODY_SENSORS,
    CALL_PHONE,
    CAMERA,
    GET_ACCOUNTS,
    PROCESS_OUTGOING_CALLS,
    READ_CALENDAR,
    READ_CALL_LOG,
    READ_CONTACTS,
    READ_EXTERNAL_STORAGE,
    READ_PHONE_STATE,
    READ_SMS,
    RECEIVE_MMS,
    RECEIVE_SMS,
    RECEIVE_WAP_PUSH,
    RECORD_AUDIO,
    SEND_SMS,
    USE_SIP,
    WRITE_CALENDAR,
    WRITE_CALL_LOG,
    WRITE_CONTACTS,
    WRITE_EXTERNAL_STORAGE
}