package com.songmao.dailyweather;

import android.content.Intent;
import android.support.v4.app.Fragment;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.songmao.dailyweather.db.City;
import com.songmao.dailyweather.db.County;
import com.songmao.dailyweather.db.Province;
import com.songmao.dailyweather.util.HttpUtil;
import com.songmao.dailyweather.util.Utility;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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

/**
 * Created by Acer on 2017/4/20.
 */

public class ChooseAreaFragment extends Fragment{

    public static final int LEVEL_PROVINCE = 0;
    public static final int LEVEL_CITY = 1;
    public static final int LEVEL_COUNTY = 2;

    private ProgressDialog progressDialog;

    private Button backButton;
    private TextView titleText;
    private ListView listView;
    private ArrayAdapter<String> adapter ;
    private View currentView;

    private List<String> dataList = new ArrayList<>(); // adapter数据集合

    private List<Province> provinceList; //省列表;

    private List<City> cityList;  //市列表;

    private List<County> countyList ; //县列表;

    private Province selectProvince; //选中的省;

    private City selectCity;  //选中的市

    private int currentLevel;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.add_city,container,false);
        titleText = (TextView) view.findViewById(R.id.title_text);
        backButton = (Button) view.findViewById(R.id.title_back);
        listView = (ListView) view.findViewById(R.id.list_view);
        adapter = new ArrayAdapter<>(getActivity(),android.R.layout.simple_list_item_1,dataList);   //书中getContext();
        listView.setAdapter(adapter);
        currentView = view;
        return view;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (currentLevel == LEVEL_PROVINCE){
                    selectProvince = provinceList.get(position);
                    queryCities();
                }else if (currentLevel == LEVEL_CITY){
                    selectCity = cityList.get(position);
                    queryCounty();
                }else if (currentLevel == LEVEL_COUNTY){
                        String weatherId = countyList.get(position).getWeatherId();
                        String countyName = countyList.get(position).getCountyName();
                        Intent intent = new Intent(getActivity(), MainActivity.class);
                        intent.putExtra("result",true);
                        intent.putExtra("weather_id", weatherId);
                        intent.putExtra("county_name",countyName);
                        startActivity(intent);
                        getActivity().finish();
                }

            }
        });

        backButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (currentLevel == LEVEL_CITY){
                    queryProvinces();
                }else if (currentLevel == LEVEL_COUNTY){
                    queryCities();
                }
            }
        });
        queryProvinces();
    }

    private void queryCounty() {
        titleText.setText(selectCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList = DataSupport.where("cityid = ?",String.valueOf(selectCity.getCityCode())).find(County.class);
        if (countyList.size() > 0){
            dataList.clear();
            for (County county :countyList){
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_COUNTY;
        }else {
             String address = "http://guolin.tech/api/china/"+selectProvince.getProvinceCode()+"/"+selectCity.getCityCode();
             queryFromService(address,"county");
    }
    }

    private void queryCities() {
        titleText.setText(selectProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);
        cityList = DataSupport.where("provinceid = ?",String.valueOf(selectProvince.getProvinceCode())).find(City.class);
        if (cityList.size() > 0){
            dataList.clear();
            for (City city : cityList){
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_CITY;
        }else {
            String address = "http://guolin.tech/api/china/"+selectProvince.getProvinceCode();
            queryFromService(address,"city");
        }
    }

    private void queryProvinces() {
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        provinceList = DataSupport.findAll(Province.class);
        if (provinceList.size() > 0) {
            dataList.clear();
            for (Province province : provinceList) {
                dataList.add(province.getProvinceName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel = LEVEL_PROVINCE;
        }else {
            String address = "http://guolin.tech/api/china";
            queryFromService(address,"province");
        }
    }

    private void queryFromService(String address, final String type) {
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address, new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(getContext(),"加载失败",Toast.LENGTH_SHORT).show();
                    }
                });
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String responseText = response.body().string();
                boolean result = false;
                if ("province".equals(type)){
                    result = Utility.handleProvinceResponse(responseText);
                }else if ("city".equals(type)){
                    result = Utility.handleCityResponse(responseText,selectProvince.getProvinceCode());
                }else if ("county".equals(type)){
                    result = Utility.handleCountyResponse(responseText,selectCity.getCityCode());
                }
                if (result){
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            closeProgressDialog();
                            if ("province".equals(type)) {
                                queryProvinces();
                            }else if ("city".equals(type)){
                                queryCities();
                            }else if ("county".equals(type)){
                                queryCounty();
                            }
                        }
                    });
                }
            }
        });
    }
    private void showProgressDialog(){
        if (progressDialog == null){
            progressDialog = new ProgressDialog(getActivity());
            progressDialog.setMessage("正在加载...");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();
    }
    private void closeProgressDialog(){
        if (progressDialog != null){
            progressDialog.dismiss();
        }
    }
    public View getCurrentView(){
        if (currentView != null){
            return  this.currentView;
        }else {
            return null;
        }
    }
}
