using System.Collections.Generic;
using System.Xml.Linq;
using UnityEngine;
using sam;
using exprivia;
using System.Collections;
using System.IO;

public class CryosatPointVariableSubsession : PointVariableSubsession
{
    public Color[] LUT;
    public int userDataIndex1 = 1;
    public int userDataIndex2 = 2;
    public int userDataIndex3 = 3;

    bool useColorArray = false;
    Color[] dpColors = null;

    public void OnVariableSelected(int vi)
    {
        XAttribute attr = prodvar.xmlElt.Attribute("cryosatcolors");
        if ((attr == null) || (string.Compare(attr.Value, "1") != 0))
        {
            useColorArray = false;
            dpColors = null;
            return;
        }

        useColorArray = true;
        dpColors = new Color[data.dataPoints.Count];
        foreach (ProductDataPoint dp in data.dataPoints)
        {
            short v1 = (data.userData[userDataIndex1] as List<short>)[dp.dataPointIndex];
            short v2 = (data.userData[userDataIndex2] as List<short>)[dp.dataPointIndex];
            short v3 = (data.userData[userDataIndex3] as List<short>)[dp.dataPointIndex];
            dpColors[dp.dataPointIndex] = LUT[1 + HighestOfThree(v1, v2, v3)];
        }
    }

    public override Color GetDataPointColor(ProductDataPoint dp)
    {
        return (useColorArray) ? dpColors[dp.dataPointIndex] : LUT[0];
    }

    int HighestOfThree(short v1, short v2, short v3)
    {
        return (v1 > v2) ? ((v1 > v3)? 0 : 2) : ((v2 > v3) ? 1 : 2);
    }

    public void OnBackButtonPressed()
    {
        string previousSceneName = (string)GlobalDictionary.GetValue("DataVariableParentSceneName");
        if (!string.IsNullOrEmpty(previousSceneName))
        {
            Debug.Log($"<color=white>SWITCHING BACK TO SCENE {previousSceneName}</color>");
            exprivia.ui.Utils.LoadScene(previousSceneName);
        }
        else
        {
            Debug.Log("<color=green>SHOULD GO BACK TO PREVIOUS SCENE</Color>");
        }
    }

    public void OnEmailButtonPressed()
    {
        string satelliteId = (string)GlobalDictionary.GetValue("SatelliteId");
        string productId = data.productName;
        string subject = $"ESA {satelliteId} product: {productId}";
        string body =
              $"{satelliteId} data\n\n"
            + $"- Product Name:{productId}\n\n"
            + $"- Variable: {prodvar.name}\n\n"
            + $"- Date: {dateText.text}\n\n"
            + $"- Longitude: {lonText.text}\n\n"
            + $"- Latitude: {latText.text}\n\n"
            + $"- Value: {curValText.text}\n\n"
            + $"Mail from ESA {satelliteId} app\n";

        Debug.Log($"SEND EMAIL! Subject: {subject} body:\n{body}");

        StartCoroutine(CaptureScreenshot(subject, body));

    }

    IEnumerator CaptureScreenshot(string subject, string body)
    {
        yield return new WaitForEndOfFrame();
        string fileName = "mailScreenshot";
        string filePath = Path.Combine(Application.temporaryCachePath, fileName + ".png"); //persistentDataPath

        Texture2D screenImage = new Texture2D(Screen.width, Screen.height);
        //Get Image from screen
        screenImage.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);
        screenImage.Apply();
                
        File.WriteAllBytes(filePath, screenImage.EncodeToPNG());
        Destroy(screenImage);

#if UNITY_ANDROID

        StartCoroutine(ShareAndroidScreenshot(subject, body, filePath));

#else
        NativeShare shareObject = new NativeShare();

        shareObject.SetTitle("Send email"); // Dialog title
        shareObject.SetSubject(subject);
        shareObject.SetText(body);
        shareObject.AddFile(filePath);

        //shareObject.SetCallback(MyCallback);
        shareObject.Share();
#endif
    }

    IEnumerator ShareAndroidScreenshot(string subject, string body, string filePath)
    {
        yield return new WaitForEndOfFrame();

        AndroidJavaClass unity = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject currentActivity = unity.GetStatic<AndroidJavaObject>("currentActivity");
        AndroidJavaClass intentClass = new AndroidJavaClass("android.content.Intent");
        AndroidJavaObject intentObject = new AndroidJavaObject("android.content.Intent");
        intentObject.Call<AndroidJavaObject>("setAction", intentClass.GetStatic<string>("ACTION_SEND"));

        // code working until Android 7
        //AndroidJavaClass uriClass = new AndroidJavaClass ("android.net.Uri");
        //AndroidJavaObject uriObject = uriClass.CallStatic<AndroidJavaObject> ("parse", "file://" + filePath);

        AndroidJavaObject fileObject = new AndroidJavaObject("java.io.File", filePath);
        AndroidJavaClass fileProviderClass = new AndroidJavaClass("android.support.v4.content.FileProvider");

        object[] providerParams = new object[3];
        providerParams[0] = currentActivity;
        providerParams[1] = Application.identifier + ".provider";
        providerParams[2] = fileObject;
        AndroidJavaObject uriObject = fileProviderClass.CallStatic<AndroidJavaObject>("getUriForFile", providerParams);

        intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_STREAM"), uriObject);
        intentObject.Call<AndroidJavaObject>("setType", "image/png");
        intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_SUBJECT"), subject);
        intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_TEXT"), body);
        intentObject.Call<AndroidJavaObject>("addFlags", intentClass.GetStatic<int>("FLAG_GRANT_READ_URI_PERMISSION"));

        AndroidJavaObject chooser = intentClass.CallStatic<AndroidJavaObject>("createChooser", intentObject, "Send email");
        currentActivity.Call("startActivity", chooser);
    }

}