package com.coolweather.app.model;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;

import com.coolweather.app.db.CoolWeatherOpenHelper;

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

/**
 * Created by lenovo on 2015/7/10.
 */
public class CoolWeatherDB {
    //数据库名
    public static final String DB_NAME = "cool_weather";
    //数据库版本
    public static final int VERSION = 1;

    private static CoolWeatherDB coolWeatherDB;

    private SQLiteDatabase db;

    //将构造方法私有化
    private CoolWeatherDB(Context context) {
        CoolWeatherOpenHelper dbHelper = new CoolWeatherOpenHelper(context,DB_NAME,null,VERSION);
        db = dbHelper.getWritableDatabase();
    }

    //获取CoolWeatherDB的实例
    public synchronized static CoolWeatherDB getInstance(Context context) {
        if (coolWeatherDB == null) {
            coolWeatherDB= new CoolWeatherDB(context);
        }
        return coolWeatherDB;
    }

    //将Province实例存储到数据库
    public void saveProvince(Province province) {
        if (province != null) {
            ContentValues values = new ContentValues();
            values.put("province_name",province.getProvinceName());
            values.put("province_code",province.getProvinceCode());
            db.insert("Province",null,values);
        }
    }

    //从数据库读取全国所有的省份信息
    public List<Province> loadProvinces() {
        List<Province> list = new ArrayList<Province>();
        Cursor cursor = db.query("Province",null,null,null,null,null,null);
        if (cursor.moveToFirst()) {
            do {
                Province province = new Province();
                province.setId(cursor.getInt(cursor.getColumnIndex("id")));
                province.setProvinceName(cursor.getString(cursor.getColumnIndex("province_name")));
                province.setProvinceCode(cursor.getString(cursor.getColumnIndex("province_code")));
                list.add(province);
            } while (cursor.moveToNext());
        }
        return list;
    }

    //将City实例存储到数据库
    public void saveCity(City city) {
        if (city != null) {
            ContentValues values = new ContentValues();
            values.put("city_name",city.getCityName());
            values.put("city_code",city.getCityCode());
            values.put("province_id",city.getProvinceId());
            db.insert("City",null,values);
        }
    }

    //从数据库读取某省下所有的城市信息
    public List<City> loadCities(int provinceId) {
        List<City> list = new ArrayList<City>();
        Cursor cursor = db.query("City",null,"province_id = ?",new String[]{String.valueOf(provinceId)},null,null,null);
        if (cursor.moveToFirst()) {
            do {
                City city = new City();
                city.setId(cursor.getInt(cursor.getColumnIndex("id")));
                city.setCityName(cursor.getString(cursor.getColumnIndex("city_name")));
                city.setCityCode(cursor.getString(cursor.getColumnIndex("city_code")));
                city.setProvinceId(provinceId);
                list.add(city);
            } while (cursor.moveToNext());
        }
        return list;
    }

    //将County实例存储到数据库
    public void saveCounty(County county) {
        if (county != null) {
            ContentValues values = new ContentValues();
            values.put("county_name",county.getCountyName());
            values.put("county_code",county.getCountyCode());
            values.put("city_id",county.getCityId());
            db.insert("County",null,values);
        }
    }

    //从数据库读取某城市下所有的县信息
    public List<County> loadCounties(int cityId) {
        List<County> list = new ArrayList<County>();
        Cursor cursor = db.query("County",null,"city_id = ?",new String[]{String.valueOf(cityId)},null,null,null);
        if (cursor.moveToFirst()) {
            do {
                County county = new County();
                county.setId(cursor.getInt(cursor.getColumnIndex("id")));
                county.setCountyName(cursor.getString(cursor.getColumnIndex("county_name")));
                county.setCountyCode(cursor.getString(cursor.getColumnIndex("county_code")));
                county.setCityId(cityId);
                list.add(county);
            } while (cursor.moveToNext());
        }
        return list;
    }

}
