/*
 * Copyright 2000-2010 JetBrains s.r.o.
 *
 * 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 org.jetbrains.android.uipreview;

import com.android.SdkConstants;
import com.android.ide.common.rendering.LayoutLibrary;
import com.android.ide.common.rendering.api.LayoutLog;
import com.android.ide.common.sdk.LoadStatus;
import com.android.sdklib.IAndroidTarget;
import com.android.sdklib.internal.project.ProjectProperties;
import com.android.tools.idea.rendering.LayoutLogWrapper;
import com.android.tools.idea.rendering.LogWrapper;
import com.android.utils.ILogger;
import com.intellij.openapi.application.ApplicationNamesInfo;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.io.FileUtil;
import com.intellij.openapi.vfs.LocalFileSystem;
import com.intellij.openapi.vfs.VirtualFile;
import org.jetbrains.android.util.AndroidBundle;
import org.jetbrains.android.util.BufferingFileWrapper;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.io.File;
import java.io.IOException;
import java.util.Map;

/**
 * Loads a {@link LayoutLibrary}
 */
public class LayoutLibraryLoader {
  private static final Logger LOG = Logger.getInstance("#org.jetbrains.android.uipreview.LayoutLibraryLoader");

  private LayoutLibraryLoader() {
  }

  @Nullable
  public static LayoutLibrary load(@NotNull IAndroidTarget target,
                                   @NotNull Map<String, Map<String, Integer>> enumMap) throws RenderingException, IOException {
    final String layoutLibJarPath = FileUtil.toSystemIndependentName((target.getPath(IAndroidTarget.LAYOUT_LIB)));
    final VirtualFile layoutLibJar = LocalFileSystem.getInstance().findFileByPath(layoutLibJarPath);
    if (layoutLibJar == null || layoutLibJar.isDirectory()) {
      throw new RenderingException(AndroidBundle.message("android.file.not.exist.error", FileUtil.toSystemDependentName(layoutLibJarPath)));
    }

    final String resFolderPath = FileUtil.toSystemIndependentName((target.getPath(IAndroidTarget.RESOURCES)));
    final VirtualFile resFolder = LocalFileSystem.getInstance().findFileByPath(resFolderPath);
    if (resFolder == null || !resFolder.isDirectory()) {
      throw new RenderingException(
        AndroidBundle.message("android.directory.cannot.be.found.error", FileUtil.toSystemDependentName(resFolderPath)));
    }

    final String fontFolderPath = FileUtil.toSystemIndependentName((target.getPath(IAndroidTarget.FONTS)));
    final VirtualFile fontFolder = LocalFileSystem.getInstance().findFileByPath(fontFolderPath);
    if (fontFolder == null || !fontFolder.isDirectory()) {
      throw new RenderingException(
        AndroidBundle.message("android.directory.cannot.be.found.error", FileUtil.toSystemDependentName(fontFolderPath)));
    }

    final String platformFolderPath = target.isPlatform() ? target.getLocation() : target.getParent().getLocation();
    final File platformFolder = new File(platformFolderPath);
    if (!platformFolder.isDirectory()) {
      throw new RenderingException(
        AndroidBundle.message("android.directory.cannot.be.found.error", FileUtil.toSystemDependentName(platformFolderPath)));
    }

    final File buildProp = new File(platformFolder, SdkConstants.FN_BUILD_PROP);
    if (!buildProp.isFile()) {
      throw new RenderingException(
        AndroidBundle.message("android.file.not.exist.error", FileUtil.toSystemDependentName(buildProp.getPath())));
    }

    final ILogger logger = new LogWrapper(LOG);
    LayoutLibrary library = LayoutLibrary.load(layoutLibJar.getPath(), logger, ApplicationNamesInfo.getInstance().getFullProductName());
    if (library.getStatus() != LoadStatus.LOADED) {
      throw new RenderingException(library.getLoadMessage());
    }

    final Map<String, String> buildPropMap = ProjectProperties.parsePropertyFile(new BufferingFileWrapper(buildProp), logger);
    final LayoutLog layoutLog = new LayoutLogWrapper(LOG);
    if (library.init(buildPropMap, new File(fontFolder.getPath()), enumMap, layoutLog)) {
      return library;
    } else {
      return null;
    }
  }
}