package com.gh.base.fragment;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.LayoutRes;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.StringRes;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentTransaction;
import androidx.lifecycle.Lifecycle;

import com.gh.base.OnListClickListener;
import com.gh.base.OnRequestCallBackListener;
import com.gh.common.constant.Constants;
import com.gh.gamecenter.BuildConfig;
import com.gh.gamecenter.eventbus.EBMiPush;
import com.lightgame.OnTitleClickListener;
import com.lightgame.utils.RuntimeUtils;
import com.lightgame.utils.Utils;

import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
import org.greenrobot.eventbus.ThreadMode;

import java.lang.ref.WeakReference;
import java.util.List;

import butterknife.ButterKnife;
import io.reactivex.Observable;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.schedulers.Schedulers;

import static com.gh.common.util.EntranceUtils.KEY_ENTRANCE;

/**
 * Created by LGT on 2016/9/4.
 * Fragment 基类
 */
public abstract class BaseFragment<T> extends Fragment implements OnRequestCallBackListener<T>,
        View.OnClickListener, OnListClickListener, OnTitleClickListener {

    public static final int RESULT_REFRESH = 9528;

    protected View mCachedView;

    protected boolean isEverPause;

    @NonNull
    protected String mEntrance;

    protected final Handler mBaseHandler = new BaseFragment.BaseHandler(this);

    protected static class BaseHandler extends Handler {
        private final WeakReference<BaseFragment> mFragmentWeakReference;

        BaseHandler(BaseFragment fragment) {
            mFragmentWeakReference = new WeakReference<>(fragment);
        }

        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            BaseFragment fragment = mFragmentWeakReference.get();
            if (fragment != null) fragment.handleMessage(msg);
        }
    }

    protected void handleMessage(Message msg) {

    }

    @LayoutRes
    protected abstract int getLayoutId();

    /**
     * 提供 Inflated 的 view ，可用于 data binding.
     */
    protected View getInflatedLayout() {
        return null;
    }

    /**
     * 责任链，谁处理了就返回true，否则返回super.handleOnClick(View view)
     *
     * @return
     */
    protected boolean handleOnClick(View view) {
        return true;
    }

    @Override
    public void onClick(View v) {
        handleOnClick(v);
    }


    protected void initView(View view) {
    }

    protected void postRunnable(Runnable runnable) {
        RuntimeUtils.getInstance().runOnUiThread(runnable);
    }

    // 定时任务全部改用这个方法, 在onDestroy做统一取消定时
    protected void postDelayedRunnable(Runnable runnable, long delayMillis) {
        RuntimeUtils.getInstance().runOnUiThread(runnable, delayMillis);
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final Intent intent = getActivity().getIntent();
        mEntrance = intent.getStringExtra(KEY_ENTRANCE);
        if (TextUtils.isEmpty(mEntrance) && getArguments() != null) {
            mEntrance = getArguments().getString(KEY_ENTRANCE);
        }

        if (TextUtils.isEmpty(mEntrance)) {
            mEntrance = Constants.ENTRANCE_UNKNOWN;
        }

        if (BuildConfig.DEBUG) {
            Utils.log("FRAGMENT_ENTRANCE -> " + mEntrance);
        }

        isEverPause = false;
        EventBus.getDefault().register(this);

        // For data binding.
        if (getInflatedLayout() != null) {
            mCachedView = getInflatedLayout();
        } else {
            mCachedView = View.inflate(getContext(), getLayoutId(), null);
        }
        ButterKnife.bind(this, mCachedView);

        initView(mCachedView);
    }

    // 必须的有subscribe才能register
    @Subscribe(threadMode = ThreadMode.BACKGROUND)
    public void onDummyEvent(EBMiPush push) {

    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        if (container != null) {
            container.removeView(mCachedView);
        }
        return mCachedView;
    }

    @Override
    public void onResume() {
        super.onResume();
        isEverPause = false;
    }

    @Override
    public void onPause() {
        super.onPause();
        isEverPause = true;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        mBaseHandler.removeCallbacksAndMessages(null);
        RuntimeUtils.getInstance().removeRunnable();
        EventBus.getDefault().unregister(this);
    }

    public void toast(@StringRes int res) {
        toast(getString(res));
    }

    public void toast(String msg) {
        Utils.toast(getContext(), msg);
    }

    public void toastLong(@StringRes int msg) {
        toastLong(getString(msg));
    }

    public void toastLong(String msg) {
        RuntimeUtils.getInstance().toastLong(getContext(), msg);
    }

    public boolean isEverPause() {
        return isEverPause;
    }

    @Override
    public void loadDone() {

    }

    @Override
    public void loadDone(T obj) {

    }

    @Override
    public void loadError() {

    }

    @Override
    public void loadEmpty() {

    }

    @Override
    public <LIST> void onListClick(View view, int position, LIST data) {

    }

    protected <K> Observable<K> asyncCall(Observable<K> observable) {
        return observable.subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread());
    }

    // 将所有的Fragment都置为隐藏状态。
    protected void hideFragments(FragmentTransaction transaction) {
        List<Fragment> list = getChildFragmentManager().getFragments();
        for (Fragment fragment : list) {
            transaction.hide(fragment);
        }
    }

    @Override
    public void onTitleClick() {
        List<Fragment> list = getChildFragmentManager().getFragments();
        for (Fragment fragment : list) {
            if (fragment instanceof OnTitleClickListener) {
                ((OnTitleClickListener) fragment).onTitleClick();
            }
        }
    }

    // 为 fragment 附加 bundle (setArgument())
    public BaseFragment with(Bundle bundle) {
        this.setArguments(bundle);
        return this;
    }

}