using System.Collections;
using UnityEngine;
using TMPro;

using Google.Apis.Auth.OAuth2;
using Google.Apis.Drive.v3;
using Google.Apis.Services;




public class UploadToGoogleDrive : MonoBehaviour
{
    public float PrintBrightnessMultiplier = 1.2f;
    public class UploadRequest
    {
        public string uploadDest;
        public string id;
        public string summary;
        public string filename;
        public bool discard;
        public bool default_image;
    }

    public RenderTexture renderTexture_postcard;

    public RenderTexture renderTexture_share;
    public string OutputFolder = "output";

    public string FirebaseUrl = "https://firestore.googleapis.com/v1/projects/uc-24070-thegreattipsy/databases/(default)/documents/";

    public TextMeshProUGUI TextNumber;
    public TextMeshProUGUI TextSummary;


    public GameObject BackgroundText;
    public GameObject BackgroundDefault;

    public GameObject ImageDiscard;
    public GameObject ImageGenerate;

    public GameObject ImageDiscardPostcard;
    public GameObject ImageGeneratePostcard;
    // Start is called before the first frame update


    public string GoogleDriveFolderId = "1m6qxzRrWfj3UcVxJNgACabS4aM8arbHq";

    UploadRequest latest_input;

    // DriveService service;

    void Start()
    {
        setupService();
    }

    // Update is called once per frame
    void Update()
    {

    }

    public void Save(string input_text)
    {

        var parmas = input_text.Split('#');
        if (parmas.Length < 2)
        {
            Debug.LogError("Input text must contain at least two parts separated by '#'.");
            return;
        }

        string uploadDest = parmas[0].Trim();
        string id = parmas[1].Trim();
        var id_paths = id.Split('/');
        if (id_paths.Length > 0)
        {
            id = id_paths[id_paths.Length - 1];
        }
        
        string summary = parmas[2].Trim();
        string filename = parmas.Length > 3 ? parmas[3].Trim() : System.DateTime.Now.ToString("yyyyMMdd_hhmmss");
        bool discard = parmas.Length > 4 && (parmas[4].Trim().ToLower() == "discard");
        bool default_image = parmas.Length > 5 && (parmas[5].Trim().ToLower() == "default");

        if (ImageDiscard != null) ImageDiscard.SetActive(discard);
        if (ImageDiscardPostcard != null) ImageDiscardPostcard.SetActive(discard);

        Debug.Log("discard: " + discard + "  default" + default_image + "  summary:" + summary);

        if (summary.Length > 0)
        {
            BackgroundDefault.SetActive(false);
            BackgroundText.SetActive(true);
        }
        else
        {
            BackgroundDefault.SetActive(true);
            BackgroundText.SetActive(false);
        }

        if (default_image)
        {
            ImageGenerate.SetActive(false);
            ImageGeneratePostcard.SetActive(false);
        }
        else
        {
            ImageGenerate.SetActive(true);
            ImageGeneratePostcard.SetActive(true);

        }

        TextNumber.SetText(id);
        TextSummary.SetText(summary);

        TextNumber.ForceMeshUpdate();
        TextSummary.ForceMeshUpdate();

        latest_input = new UploadRequest()
        {
            uploadDest = uploadDest,
            id = id,
            summary = summary,
            filename = filename,
            discard = discard,
            default_image = default_image
        };
        StartCoroutine(ExportAfterFrame(latest_input));
    }

    private IEnumerator ExportAfterFrame(UploadRequest uploadRequest)
    {
        // Wait for the end of the current frame, after all Update and LateUpdate calls have finished.
        yield return new WaitForEndOfFrame();

        // Now, call the Export function.
        Export(uploadRequest);
    }

    public void Export(UploadRequest uploadRequest = null)
    {

        if (uploadRequest == null)
        {
            Debug.LogError("UploadRequest is null.");
            return;
        }

        string uploadDest = uploadRequest.uploadDest;
        string id = uploadRequest.id;
        string summary = uploadRequest.summary;
        string filename = uploadRequest.filename;
        bool discard = uploadRequest.discard;
        bool default_image = uploadRequest.default_image;

        Debug.Log("Saving image to: " + uploadDest + "  filename=" + filename + "  id=" + id);
        if (string.IsNullOrEmpty(uploadDest))
        {
            return;
        }

        if (string.IsNullOrEmpty(filename))
        {
            Debug.LogError("Filename cannot be null or empty.");
            return;
        }
        Debug.Log("Saving image to: " + uploadDest + "  filename=" + filename + "  id=" + id);

        string timestamp = System.DateTime.Now.ToString("yyyyMMdd");

        if (!System.IO.Directory.Exists(OutputFolder + "/" + uploadDest))
        {
            System.IO.Directory.CreateDirectory(OutputFolder + "/" + uploadDest);
        }


        SaveRenderTextureToPNG(renderTexture_postcard, System.IO.Path.Combine(OutputFolder + "/" + uploadDest, filename + "_print.png"));
        Debug.Log("Image saved to " + filename);

        SaveRenderTextureToPNG(renderTexture_share, System.IO.Path.Combine(OutputFolder + "/" + uploadDest, filename + ".png"));
        Debug.Log("Image saved to " + filename);

        // Optionally, you can also log the full path
        string print_fullPath = System.IO.Path.Combine(OutputFolder + "/" + uploadDest + "/", filename + "_print.png");
        Debug.Log("print_path: " + print_fullPath);

        upload(print_fullPath, id, "print", !default_image && !discard);

        string share_fullPath = System.IO.Path.Combine(OutputFolder + "/" + uploadDest + "/", filename + ".png");
        Debug.Log("share_path: " + share_fullPath);
        upload(share_fullPath, id, "share");
    }

    void SaveRenderTextureToPNG(RenderTexture rt, string filePath)
    {
        Debug.Log("Saving RenderTexture to PNG at " + filePath);

        RenderTexture currentRT = RenderTexture.active;
        RenderTexture.active = rt;

        Texture2D tex = new Texture2D(rt.width, rt.height, TextureFormat.RGBA32, false);
        tex.ReadPixels(new Rect(0, 0, rt.width, rt.height), 0, 0);

        // Apply gamma correction (sRGB conversion) to each pixel
        for (int y = 0; y < tex.height; y++)
        {
            for (int x = 0; x < tex.width; x++)
            {
                Color linearColor = tex.GetPixel(x, y);
                Color sRGBColor = new Color(
                    Mathf.LinearToGammaSpace(linearColor.r),
                    Mathf.LinearToGammaSpace(linearColor.g),
                    Mathf.LinearToGammaSpace(linearColor.b),
                    linearColor.a
                );

                sRGBColor.r *= PrintBrightnessMultiplier;
                sRGBColor.g *= PrintBrightnessMultiplier;
                sRGBColor.b *= PrintBrightnessMultiplier;

                tex.SetPixel(x, y, sRGBColor);
            }
        }
        tex.Apply();

        byte[] bytes = tex.EncodeToPNG();
        System.IO.File.WriteAllBytes(filePath, bytes);

        Debug.Log("Saved RenderTexture to PNG at " + filePath + " with size: " + bytes.Length + " bytes");

        RenderTexture.active = currentRT;
        Destroy(tex);
    }
    void setupService()
    {
        // Debug.Log("Setting up Google Drive service...");
        // // Initialize Google Drive API service
        // service = new DriveService(new BaseClientService.Initializer()
        // {
        //     HttpClientInitializer = GoogleCredential.FromFile("../Material/tech-277909-8bd38efb7464.json").CreateScoped(DriveService.Scope.DriveFile),
        //     ApplicationName = "24070-Upload",
        // });

        GoogleDriveUtils.setupService();
    }


    void upload(string _uploadFile, string _fileId, string type, bool needToPrint = true)
    {

        if (GoogleDriveUtils.service == null)
        {
            Debug.Log("service is null, setting up service again.");
            setupService();
        }


        string path = _fileId;
        int lastSlash = path.LastIndexOf('/');
        if (lastSlash >= 0)
        {
            path = path[..lastSlash];
        }
        Debug.Log("Uploading file to Google Drive: " + _uploadFile + "  folder=" + path);

        string folderId = GoogleDriveUtils.getFolder(GoogleDriveUtils.service, path, GoogleDriveFolderId);

        StartCoroutine(GoogleDriveUtils.UploadCoroutine(GoogleDriveUtils.service, _uploadFile, folderId, _fileId, type,
            (response) =>
            {
                if (response != null)
                {
                    var url = response;
                    Debug.Log("Upload successful:" + url);

                    if (type == "print")
                    {
                        if (needToPrint)
                            writeToFirebase("prints", System.DateTime.Now.ToString("yyyyMMdd_hhmmss"), url, type);
                    }
                    else
                    {
                        writeToFirebase("records", "user/" + _fileId + "/file/" + type, url, type);
                    }
                }
                else
                {
                    Debug.LogError("Upload failed: " + response);
                }
            }
        ));
    }

    public void writeToFirebase(string collection, string id, string url, string type)
    {
        Debug.Log("Writing to Firebase: " + collection + "/" + id);
        StartCoroutine(WriteToFirebaseCoroutine(id, url));

        IEnumerator WriteToFirebaseCoroutine(string id, string url)
        {
            // string[] tags=filename.Split('/');
            // string id=tags[tags.Length - 1].Split('.')[0];
            Debug.Log("Extracted ID: " + id);

            string firebaseUrl = FirebaseUrl + collection + "/" + id;
            string jsonData = "{ \"fields\": { " +
                "\"" + type + "_url\": { \"stringValue\": \"" + url + "\" }, " +
                "\"timestamp\": { \"timestampValue\": \"" + System.DateTime.UtcNow.ToString("o") + "\" } " +
                "} }";

            using (var www = new UnityEngine.Networking.UnityWebRequest(firebaseUrl, "PATCH"))
            {
                byte[] bodyRaw = System.Text.Encoding.UTF8.GetBytes(jsonData);
                www.uploadHandler = new UnityEngine.Networking.UploadHandlerRaw(bodyRaw);
                www.downloadHandler = new UnityEngine.Networking.DownloadHandlerBuffer();
                www.SetRequestHeader("Content-Type", "application/json");

                yield return www.SendWebRequest();

#if UNITY_2020_1_OR_NEWER
                if (www.result != UnityEngine.Networking.UnityWebRequest.Result.Success)
#else
                if (www.isNetworkError || www.isHttpError)
#endif
                {
                    Debug.LogError("Error writing to Firebase: " + www.error);
                    Debug.LogError("Response: " + www.downloadHandler.text);
                }
                else
                {
                    Debug.Log("Successfully wrote to Firebase: " + www.downloadHandler.text);
                }
            }
        }
    }
}