using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using UnityEngine;
using UnityEngine.Networking;

public class TextRecogniseApi : MonoBehaviour
{


    public static TextRecogniseApi instance;

    private void Awake()
    {
        instance = this;

    }

    private void Start()
    {
        //SendApi(sprite.texture);
    }

    public Sprite sprite;

    public void SendApi(Texture2D tex)
    {
        StartCoroutine(Upload(tex));
    }

    private string GetJson(Texture2D tex)
    {
        string json = "{\"requests\": [{\"image\": {\"content\": ";
        json += "\"" + Convert.ToBase64String(tex.EncodeToPNG()) + "\"";
        json += "},\"features\": [{\"type\": \"DOCUMENT_TEXT_DETECTION\"}],";
        json += "\"imageContext\": {\"languageHints\": [\"zh-hant\"]}";
        json += "}]}";
        return json;

    }


    const string basePath = "https://vision.googleapis.com/v1/images:annotate?key=AIzaSyBOHwX6uyXTqgrniQWv3ZxWbsukD_sey2A";
    IEnumerator Upload(Texture2D tex)
    {
        string json = GetJson(tex);
        Debug.Log(json);

        var request = new UnityWebRequest(basePath, "POST");
        request.uploadHandler = (UploadHandler)new UploadHandlerRaw(Encoding.UTF8.GetBytes(json));
        request.downloadHandler = (DownloadHandler)new DownloadHandlerBuffer();
        request.SetRequestHeader("Content-Type", "application/json");
        yield return request.SendWebRequest();
        Debug.Log(request.downloadHandler.text);
        Debug.Log("Status Code: " + request.responseCode);


    }
}