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/*
 * Copyright 2014 Alexei Barantsev
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ru.stqa.selenium.factory;

import org.openqa.selenium.Capabilities;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebDriverException;
import org.openqa.selenium.remote.DesiredCapabilities;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.logging.Level;
import java.util.logging.Logger;

public class ReflectionBasedLocalDriverProvider implements LocalDriverProvider {

  private static final Logger LOG = Logger.getLogger(ReflectionBasedLocalDriverProvider.class.getName());

  private Capabilities capabilities;
  private Class driverClass;
  private String driverClassName;

  public ReflectionBasedLocalDriverProvider(Capabilities capabilities, Class driverClass) {
    this.capabilities = new DesiredCapabilities(capabilities);
    this.driverClass = driverClass;
  }

  public ReflectionBasedLocalDriverProvider(Capabilities capabilities, String driverClassName) {
    this.capabilities = new DesiredCapabilities(capabilities);
    this.driverClassName = driverClassName;
  }

  private Class getDriverClass() {
    if (driverClass != null) {
      return driverClass;
    }
    try {
      return Class.forName(driverClassName).asSubclass(WebDriver.class);
    } catch (ClassNotFoundException e) {
      LOG.log(Level.INFO, "Driver class not found: " + driverClassName);
      return null;
    } catch (NoClassDefFoundError e) {
      LOG.log(Level.INFO, "Driver class not found: " + driverClassName);
      return null;
    } catch (UnsupportedClassVersionError e) {
      LOG.log(Level.INFO, "Driver class is built for higher Java version: " + driverClassName);
      return null;
    }
  }

  @Override
  public boolean canCreateDriverInstanceFor(Capabilities capabilities) {
    return this.capabilities.getBrowserName().equals(capabilities.getBrowserName());
  }

  @Override
  public WebDriver createDriver(Capabilities capabilities) {
    if (canCreateDriverInstanceFor(capabilities)) {
      return callConstructor(getDriverClass(), capabilities);
    } else {
      return null;
    }
  }

  private WebDriver callConstructor(Class from, Capabilities capabilities) {
    try {
      Constructor constructor = from.getConstructor(Capabilities.class);
      return constructor.newInstance(capabilities);
    } catch (NoSuchMethodException e) {
      try {
        return from.newInstance();
      } catch (InstantiationException e1) {
        throw new WebDriverException(e);
      } catch (IllegalAccessException e1) {
        throw new WebDriverException(e);
      }
    } catch (InvocationTargetException e) {
      throw new WebDriverException(e);
    } catch (InstantiationException e) {
      throw new WebDriverException(e);
    } catch (IllegalAccessException e) {
      throw new WebDriverException(e);
    }
  }
}