using System;
using System.IO;
using UnityEngine;
using UnityEngine.UI;
using sam;
using exprivia;
using System.Collections;
//using static NativeShare;

public class ERSAreaVariableSubsession : AreaVariableSubsession
{
    public Image lut;
    public Color fillColor;

    public SatelliteAreaDataConfig satelliteCfg;
    int curSelectedVarIndex = -1; // this is an index into satelliteCfg.areaVariables list

    Texture2D lutTexture;
    ProductLoader prodLoader;

    string productName;

    private void Awake()
    {
        autoSelectVariable = false;
        prodLoader = exprivia.Utils.GetOrAddComponent<ProductLoader>(gameObject);

        lutTexture = lut.sprite.texture;
    }

    public void SetSatelliteConfig(SatelliteAreaDataConfig cfg)
    {
        satelliteCfg = cfg;
        initiallySelectedVariableIndex = cfg.initiallySelectedVariableIndex;
        prodLoader.dateExtractor = cfg.dateExtractionFunc;
        prodLoader.productNameExtractor = cfg.productNameExtractionFunc;

        //if (initiallySelectedVariableIndex < 0 || initiallySelectedVariableIndex >= satelliteCfg.areaVariables.Length)
        //    initiallySelectedVariableIndex = 0;

        /*string smallestName = satelliteCfg.areaVariables[0].variableName;
        int smallestIndex = 0;
        for (int i = 1; i < satelliteCfg.areaVariables.Length; i++)
        {
            if (satelliteCfg.areaVariables[i].variableName.CompareTo(smallestName) < 0)
            {
                smallestName = satelliteCfg.areaVariables[i].variableName;
			    smallestIndex = i;
            }
        }

        initiallySelectedVariableIndex = smallestIndex;*/


        for (int i = 0; i < satelliteCfg.areaVariables.Length; i++)
        {
            AreaVariableConfig avc = satelliteCfg.areaVariables[i];
            avc.index = i;
            string fullpath = Path.Combine(Application.streamingAssetsPath, avc.profileFilename);
            avc.profile = ProductProfile.ParseConfigFile(fullpath);
            if (avc.profile == null)
            {
                Debug.LogError($"ERROR LOADING SINGLE-VARIABLE PRODUCT PROFILE: {fullpath}");
                return;
            }
            satelliteCfg.areaVariables[i] = avc;
        }
    }

    public void SetProductName(string prodName)
    {
        productName = prodName;
        SelectVariable(initiallySelectedVariableIndex);
    }

    public override void SelectVariable(int varInd)
    {
        if (varInd < 0 || varInd >= satelliteCfg.areaVariables.Length)
        {
            Debug.LogWarning($"SelectVariable: invalid variable index {varInd}");
            return;
        }

        if (varInd == curSelectedVarIndex)
            return;

        curSelectedVarIndex = varInd;

        prodLoader.profile = satelliteCfg.areaVariables[curSelectedVarIndex].profile;
        prodLoader.dateExtractor = satelliteCfg.dateExtractionFunc;
        prodLoader.productNameExtractor = satelliteCfg.productNameExtractionFunc;

        Debug.Log($"<color=white>LOADER PROFILE SET TO {prodLoader.profile}</color>");

        string dataUrl = satelliteCfg.areaVariables[curSelectedVarIndex].url + "/" + productName;

        prodLoader.Download(dataUrl,
            // OnSuccess
            (loader) =>
            {
                SelectProduct(loader.downloadedData);
                base.SelectVariable(0);
            },

            // OnError
            (loader) =>
            {
            });
    }

    public override Color GetDataPointColor(ProductDataPoint dp)
    {
        if (!dp.varValid[variableIndex])
        {
            return fillColor;
        }

        float val = dp.variables[variableIndex];
        float frac = ((val - prodvar.scaledMinValue) / prodvar.scaledRange);
        frac = Mathf.Clamp(frac, 0.0f, 1.0f);
        float tc = frac * lutTexture.width;
        int intCoord = (int)tc;
        float fracCoord = tc - intCoord;
        Color val1 = lutTexture.GetPixel(intCoord, 0);
        Color val2 = lutTexture.GetPixel(Math.Min(intCoord+1, lutTexture.width-1), 0);
        Color c = Color.Lerp(val1, val2, fracCoord);
        c.a = 1f;
        return c;
    }

    public void OnMapScrolled(Vector2 xy)
    {
        if ((latLonDictionaries == null) || latLonDictionaries.Count == 0)
            return;

        float lat = Mathf.LerpUnclamped(-90f, 90f, xy.y);
        float lon = Mathf.LerpUnclamped(-180f, 180f, xy.x);
        SelectLatLon(lat, lon);
    }


    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.persistentDataPath, fileName + ".png");

        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"));

        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);
    }
}