package com.dayu.pipirrapp.activity;

import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.Fragment;

import com.dayu.pipirrapp.MyApplication;
import com.dayu.pipirrapp.R;
import com.dayu.pipirrapp.adapter.TabAdapter;
import com.dayu.pipirrapp.bean.db.TagBean;
import com.dayu.pipirrapp.dao.DaoSingleton;
import com.dayu.pipirrapp.databinding.ActivityMainBinding;
import com.dayu.pipirrapp.fragment.OrderFragment;
import com.dayu.pipirrapp.fragment.MapFragment;
import com.dayu.pipirrapp.fragment.MyFragment;
import com.dayu.pipirrapp.net.MqttManager;

import java.util.ArrayList;
import java.util.List;

/**
 * 首页
 */
public class MainActivity extends AppCompatActivity {
    private ActivityMainBinding binding;
    private List<Fragment> fragments = new ArrayList<>();
    private long mExitTime;
    MqttManager mqttManager;

    private enum Tab {
        ORDER, MAP, MY
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = ActivityMainBinding.inflate(LayoutInflater.from(this));
        setContentView(binding.getRoot());

        setupFragments();
        initView();
        initTab();

        TagBean tagBean = DaoSingleton.getInstance(this).tagDao().findFirst();
        MyApplication.myApplication.myTag = tagBean.getTag();
        mqttManager = new MqttManager(this);
        mqttManager.connect();
    }

    private void setupFragments() {
        fragments.add(new OrderFragment());
        fragments.add(new MapFragment());
        fragments.add(new MyFragment());
    }

    private void initView() {
        binding.orderLL.setOnClickListener(v -> changeBottomState(Tab.ORDER));
        binding.mapLL.setOnClickListener(v -> changeBottomState(Tab.MAP));
        binding.myLL.setOnClickListener(v -> changeBottomState(Tab.MY));
    }

    private void initTab() {
        TabAdapter adapter = new TabAdapter(getSupportFragmentManager(), fragments);
        binding.viewPager.setAdapter(adapter);
        binding.viewPager.setPagingEnabled(false);
        binding.viewPager.setOffscreenPageLimit(fragments.size());
        binding.viewPager.setCurrentItem(1); // 默认显示地图页
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            if ((System.currentTimeMillis() - mExitTime) > 2000) {
                Toast.makeText(MainActivity.this, "再按一次退出程序", Toast.LENGTH_SHORT).show();
                mExitTime = System.currentTimeMillis();
            } else {
                finish();
            }
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        //关闭MQ
        mqttManager.disconnect();
    }

    /**
     * 修改底部状态
     */
    private void changeBottomState(Tab tab) {
        resetTabState();
        switch (tab) {
            case ORDER:
                updateTabUI(0, R.drawable.bottom_order_white, R.color.white);
                break;
            case MAP:
                updateTabUI(1, R.drawable.bottom_map_white, R.color.white);
                break;
            case MY:
                updateTabUI(2, R.drawable.bottom_my_white, R.color.white);
                break;
        }
    }

    /**
     * 更新某个 Tab 的 UI 状态
     */
    private void updateTabUI(int position, int iconResId, int textColorResId) {
        binding.viewPager.setCurrentItem(position);
        switch (position) {
            case 0:
                binding.orderImg.setImageDrawable(ContextCompat.getDrawable(this, iconResId));
                binding.orderText.setTextColor(ContextCompat.getColor(this, textColorResId));
                break;
            case 1:
                binding.mapImg.setImageDrawable(ContextCompat.getDrawable(this, iconResId));
                binding.mapText.setTextColor(ContextCompat.getColor(this, textColorResId));
                break;
            case 2:
                binding.myImg.setImageDrawable(ContextCompat.getDrawable(this, iconResId));
                binding.myText.setTextColor(ContextCompat.getColor(this, textColorResId));
                break;
        }
    }

    /**
     * 重置所有 Tab 的默认状态
     */
    private void resetTabState() {
        binding.orderImg.setImageDrawable(ContextCompat.getDrawable(this, R.drawable.bottom_order_black));
        binding.orderText.setTextColor(ContextCompat.getColor(this, R.color.black));

        binding.mapImg.setImageDrawable(ContextCompat.getDrawable(this, R.drawable.bottom_map_black));
        binding.mapText.setTextColor(ContextCompat.getColor(this, R.color.black));

        binding.myImg.setImageDrawable(ContextCompat.getDrawable(this, R.drawable.bottom_my_black));
        binding.myText.setTextColor(ContextCompat.getColor(this, R.color.black));
    }
}