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

public class MyIMEApi : MonoBehaviour
{
    public static MyIMEApi instance;

    private void Awake()
    {
        instance = this;
    }

    public void SendApi(string inkData, DrawOnTexture keyboard)
    {
        StartCoroutine(Upload(inkData, keyboard));
    }

    private string GetJson(string inkData)
    {
        //return "{\"options\": \"enable_pre_space\",\"requests\": [{\"writing_guide\":{\"writing_area_width\": 280,\"writing_area_height\": 280},\"max_num_results\": 10,\"max_completions\": 0,\"language\": \"zh\",\"ink\": [[[53, 53, 55, 58, 61, 65, 71, 77, 89, 97, 101, 110, 118, 126, 135, 142, 149, 156, 162, 168, 173, 177, 182, 186, 190, 192, 195, 197, 200, 201, 202, 203, 204, 205, 205, 205, 206, 206, 207, 209, 210, 212, 214, 217, 219, 221, 223, 225, 226, 227, 228, 229, 230, 230, 230, 231, 231, 231],[153, 153, 153, 153, 153, 153, 153, 153, 153, 153, 153, 153, 153, 153, 153, 153, 153, 153, 152, 152, 152, 152, 152, 152, 152, 152, 152, 152, 152, 152, 152, 152, 153, 153, 153, 153, 153, 153, 153, 153, 153, 154, 154, 154, 154, 154, 155, 155, 155, 155, 155, 155, 155, 155, 155, 155, 155, 155],[]]]}]}";
        string json =
            "{\"options\": \"enable_pre_space\",\"requests\": [{\"writing_guide\":{\"writing_area_width\": 1080,\"writing_area_height\": 460},\"max_num_results\": 1,\"max_completions\": 0,\"language\": \"zh\",\"ink\": [[";
        json += inkData;
        json += "[]]]}]}";
        return json;
    }


    const string basePath = "https://inputtools.google.com/request?ime=handwriting";

    IEnumerator Upload(string inkData, DrawOnTexture keyboard)
    {
        string json = GetJson(inkData);
        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);
        //keyboard.SendKeyString(ProcessJson(request.downloadHandler.text));

        string processJson = "";
        try
        {
            processJson = ProcessJson(request.downloadHandler.text);
        }
        catch (Exception e)
        {
            processJson = "";
            Debug.Log(e);
        }

        Debug.Log(processJson);
        keyboard.DoneLoadingDestroyStrokes(processJson);

        //keyboard.DoneLoadingDestroyStrokes(ProcessJson(request.downloadHandler.text));
    }

    private string ProcessJson(string json)
    {
        return json[34].ToString();
    }

    public int GetNthIndex(string s, char t, int n)
    {
        int count = 0;
        for (int i = 0; i < s.Length; i++)
        {
            if (s[i] == t)
            {
                count++;
                if (count == n)
                {
                    return i;
                }
            }
        }

        return -1;
    }
}