package com.mxdl.okhttp3.http;


import android.os.Handler;
import android.os.Looper;
import android.os.Message;

import androidx.annotation.NonNull;

import com.google.gson.Gson;
import com.mxdl.okhttp3.bean.ResDTO;

import org.jetbrains.annotations.NotNull;

import java.io.IOException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
 * Description: <MyCallBack><br>
 * Author:      mxdl<br>
 * Date:        2020/5/2<br>
 * Version:     V1.0.0<br>
 * Update:     <br>
 */
public class MyCallBack<T> implements Callback {
    private OnResponse<T> mOnResponse;
    private static final int ON_START = 0;
    private static final int ON_SUCC = 1;
    private static final int ON_FAIL = 2;
    private static final int ON_COMPLETE = 3;
    private Handler mHandler = new Handler(Looper.getMainLooper()) {
        @Override
        public void handleMessage(@NonNull Message msg) {
            switch (msg.what) {
                case ON_START:
                    if (mOnResponse != null) {
                        mOnResponse.onStart();
                    }
                    break;
                case ON_SUCC:
                    if (mOnResponse != null) {
                        try {
                            String body = (String) msg.obj;
                            Type type = mOnResponse.getClass().getGenericSuperclass();
                            Type[] types = ((ParameterizedType) type).getActualTypeArguments();
                            Type ty = new MyParameterizedType(ResDTO.class, new Type[]{types[0]});
                            ResDTO<T> data = new Gson().fromJson(body, ty);
                            mOnResponse.onSucc(data);
                        } catch (Exception e) {
                            mOnResponse.onFail(e);
                        }
                    }
                    break;
                case ON_FAIL:
                    if (mOnResponse != null) {
                        mOnResponse.onFail(msg.obj != null ? (Exception) msg.obj : new Exception());
                    }
                    break;
                case ON_COMPLETE:
                    if (mOnResponse != null) {
                        mOnResponse.onComplete();
                    }
                    break;
            }
        }
    };

    public MyCallBack(OnResponse<T> onResponse) {
        mOnResponse = onResponse;
    }

    @Override
    public void onFailure(@NotNull Call call, @NotNull IOException e) {
        Message message = new Message();
        message.what = ON_FAIL;
        message.obj = e;
        mHandler.sendMessage(message);

        Message message1 = new Message();
        message1.what = ON_COMPLETE;
        mHandler.sendMessage(message1);
    }

    @Override
    public void onResponse(@NotNull Call call, @NotNull Response response) {
        try {
            if (response.isSuccessful()) {
                Message message = new Message();
                message.what = ON_SUCC;
                String string = response.body().string();
                message.obj = string;
                mHandler.sendMessage(message);
            } else {
                Message message = new Message();
                message.what = ON_FAIL;
                mHandler.sendMessage(message);
            }
        } catch (Exception e) {
            Message message = new Message();
            message.what = ON_FAIL;
            message.obj = e;
            mHandler.sendMessage(message);
        } finally {
            Message message = new Message();
            message.what = ON_COMPLETE;
            mHandler.sendMessage(message);
        }

    }


    public void onStart() {
        Message message = new Message();
        message.what = ON_START;
        mHandler.sendMessage(message);
    }


    public Class getTClass() {
        Class<T> tClass = (Class<T>) ((ParameterizedType) mOnResponse.getClass().getGenericSuperclass()).getActualTypeArguments()[0];
        return tClass;
    }
}