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

public class WebRequsetTool : Singleton<WebRequsetTool>
{

    /// <summary>
    /// 网络GET请求
    /// </summary>
    /// <param name="url">网络链接</param>
    /// <param name="action">回调事件</param>
    public void Get(string url, UnityAction<string> action)
    {
        StartCoroutine(GetRequest(url, action));
    }

    /// <summary>
    /// 网络POST请求
    /// </summary>
    /// <param name="url">网络链接</param>
    /// <param name="data">请求数据</param>
    /// <param name="action">回调函数</param>
    public void Post(string url, string data, UnityAction<string> action)
    {
        StartCoroutine(PostRequest(url, data, action));
    }

    /// <summary>
    /// 完成网络GET请求
    /// </summary>
    /// <param name="url">网络链接</param>
    /// <param name="action">回调函数</param>
    /// <returns></returns>
    IEnumerator GetRequest(string url, UnityAction<string> action)
    {
        UnityWebRequest request = UnityWebRequest.Get(url);

        yield return request.SendWebRequest();

        if (request.result == UnityWebRequest.Result.Success)
        {
            action?.Invoke(request.downloadHandler.text);
        }
        else
        {
            Debug.LogError(request.error);
        }

        request.Dispose();
    }

    /// <summary>
    /// 完成网络POST请求
    /// </summary>
    /// <param name="url">网络链接</param>
    /// <param name="data">请求数据</param>
    /// <param name="action">回调函数</param>
    /// <returns></returns>
    IEnumerator PostRequest(string url, string data, UnityAction<string> action)
    {
        UnityWebRequest request = new UnityWebRequest(url, "POST");

        byte[] bodyRaw = Encoding.UTF8.GetBytes(data);
        request.uploadHandler = new UploadHandlerRaw(bodyRaw);
        request.downloadHandler = new DownloadHandlerBuffer();
        request.SetRequestHeader("Content-Type", "application/json;charset=utf-8");

        yield return request.SendWebRequest();

        if (request.result == UnityWebRequest.Result.Success)
        {
            action?.Invoke(request.downloadHandler.text);
        }
        else
        {
            Debug.LogError(request.error);
        }

        request.Dispose();
    }

}