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

[Serializable]
public class Part
{
    public string text;
}

[Serializable]
public class Content
{
    public Part[] parts;
}

[Serializable]
public class Candidate
{
    public Content content;
}

[Serializable]
public class GeminiResponse
{
    public Candidate[] candidates;
}
public class GerminiNPC :MonoBehaviour
{
    [SerializeField]
    private string apiKey = "AQ.Ab8RN6I2hU_p8yHiPNNHtWzYBiLugbPP22gC6lzTWaYEWj4v0g";
    [SerializeField]
    private string germiniURL =
        "https://generativelanguage.googleapis.com/v1beta/models/gemini-flash-latest:generateContent";

    public string npcPersona =
        $"Nguơi là ột thợ lão thợ rèn cọc cằn tên là TOm,ngươi rất ghét những kẻ mang phế liệu đến tiệm của mình.Ch trả lời ngắn gọn trong 2 câu,theo phong cách trung cổ";

    public string playerHeldItem = "Thanh kiếm rỉ sét";

    private void Update()
    {
        if (Keyboard.current.spaceKey.wasPressedThisFrame)
        {
            StartCoroutine(GetGerminiReponse());
        }
    }

    private IEnumerator GetGerminiReponse()
    {
        var jsonBody = $@"{{""systemInstruction"": {{""parts"": [{{ ""text"": ""{npcPersona}"" }}]}},
            ""contents"": [{{""parts"": [{{ ""text"": ""Ta muốn bán cho ông món đồ này cho ông {playerHeldItem}""}}]}}] }} ";
        var requestURL = $"{germiniURL}?ket={apiKey}";
        using (var request = new UnityWebRequest(germiniURL, "POST"))   
        {
            var bodyRaw = Encoding.UTF8.GetBytes(jsonBody);
            request.uploadHandler = new UploadHandlerRaw(bodyRaw);
            request.downloadHandler = new DownloadHandlerBuffer();
            request.SetRequestHeader("Content-Type", "application/json");
            yield return request.SendWebRequest();
            if (request.result == UnityWebRequest.Result.ProtocolError)
            {
                Debug.LogError(request.error);
            }
            else
            {
                var responseTEXT = request.downloadHandler.text;
                var germiniResponse=JsonUtility.FromJson<GeminiResponse>(responseTEXT);
                if (germiniResponse.candidates.Length > 0)
                {
                    var npcResponse = germiniResponse.candidates[0].content.parts[0].text;
                    Debug.Log(npcResponse);
                }
            }
        }
    }
}