package com.example.air.weather;

import android.app.*;
import android.content.*;
import android.os.*;
import android.view.*;
import android.widget.*;
import com.example.air.weather.db.*;
import com.example.air.weather.util.*;
import org.litepal.crud.*;
import java.io.*;
import java.util.*;
import okhttp3.*;

    /**
     * Created by Air on 2017/4/10.
     *      遍历省市县数据
     */

    public class Choose_AreaFragment 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 TextView titleText;
    private Button backButton;
    private ListView listView;
    private ArrayAdapter<String> adapter;
    private List<String> dataList = new ArrayList<>();

    private List<Province> provinceList;//省列表
    private List<City> cityList;//市列表
    private List<County> countyList;//县列表
    private Province selectedProvince;//选中的省份
    private City selectedCity;//选中的城市
    private int currentLevel;//当前选中的级别

    @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){
                    selectedProvince = provinceList.get(position);
                    queryCities();
                }
            }
        });
        backButton.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                if (currentLevel == LEVEL_COUNTY){
                    queryCities();
                }
            }
        });
        queryProvinces();
    }

    /**
     * 查询全国所有的省,优先从数据库查询,如果没有查询到再去服务器上查询
     */
    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";
            queryFromServer(address, "province");
        }
    }

    /**
     * 查询选中省内所有的市，优先从数据库查询，如果没有查询到再去服务器上查询。
     */
    private void queryCities() {
        titleText.setText(selectedProvince.getProvinceName());
        backButton.setVisibility(View.VISIBLE);
        cityList = DataSupport.where("provinceid = ?", String.valueOf(selectedProvince.getId())).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 {
            int provinceCode = selectedProvince.getProvinceCode();
            String address = "http://guolin.tech/api/china/" + provinceCode;
            queryFromServer(address, "city");
        }
    }

    /**
     * 查询选中市内所有的县，优先从数据库查询，如果没有查询到再去服务器上查询。
     */
    private void queryCounties() {
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList = DataSupport.where("cityid = ?", String.valueOf(selectedCity.getId())).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 {
            int provinceCode = selectedProvince.getProvinceCode();
            int cityCode = selectedCity.getCityCode();
            String address = "http://guolin.tech/api/china/" + provinceCode + "/" + cityCode;
            queryFromServer(address, "county");
        }
    }

    /**
     * 根据传入的地址和类型从服务器上查询省市县数据。
     */
    private void queryFromServer(String address, final String type) {
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address, new Callback() {
            @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, selectedProvince.getId());
                } else if ("county".equals(type)) {
                    result = UTILity.handleCountyResponse(responseText, selectedCity.getId());
                }
                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)) {
                                queryCounties();
                            }
                        }
                    });
                }
            }

            @Override
            public void onFailure(Call call, IOException e) {
                // 通过runOnUiThread()方法回到主线程处理逻辑
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(getContext(), "加载失败", Toast.LENGTH_SHORT).show();
                    }
                });
            }
        });
    }

    /**
     * 显示进度对话框
     */
    private void showProgressDialog() {
        if (progressDialog == null) {
            progressDialog = new ProgressDialog(getActivity());
            progressDialog.setMessage("正在加载...");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();
    }

    /**
     * 关闭进度对话框
     */
    private void closeProgressDialog() {
        if (progressDialog != null) {
            progressDialog.dismiss();
        }
    }

}
