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/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * 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 com.android.sdklib.internal.repository.packages;

import com.android.SdkConstants;
import com.android.annotations.NonNull;
import com.android.annotations.VisibleForTesting;
import com.android.annotations.VisibleForTesting.Visibility;
import com.android.sdklib.AndroidVersion;
import com.android.sdklib.AndroidVersion.AndroidVersionException;
import com.android.sdklib.SdkManager;
import com.android.sdklib.SystemImage;
import com.android.sdklib.devices.Abi;
import com.android.sdklib.internal.repository.IDescription;
import com.android.sdklib.internal.repository.sources.SdkSource;
import com.android.sdklib.repository.MajorRevision;
import com.android.sdklib.repository.PkgProps;
import com.android.sdklib.repository.SdkRepoConstants;
import com.android.sdklib.repository.SdkSysImgConstants;
import com.android.sdklib.repository.descriptors.IPkgDesc;
import com.android.sdklib.repository.descriptors.IdDisplay;
import com.android.sdklib.repository.descriptors.PkgDesc;
import com.android.sdklib.repository.local.LocalSysImgPkgInfo;

import org.w3c.dom.Node;

import java.io.File;
import java.util.Locale;
import java.util.Map;
import java.util.Properties;
import java.util.regex.Pattern;

/**
 * Represents a system-image XML node in an SDK repository.
 */
public class SystemImagePackage extends MajorRevisionPackage
        implements IAndroidVersionProvider, IPlatformDependency {

    /** The package version, for platform, add-on and doc packages. */
    private final AndroidVersion mVersion;

    /** The ABI of the system-image. Must not be null nor empty. */
    private final String mAbi;

    private final IPkgDesc mPkgDesc;

    private final IdDisplay mTag;

    /**
     * Creates a new system-image package from the attributes and elements of the given XML node.
     * This constructor should throw an exception if the package cannot be created.
     *
     * @param source The {@link SdkSource} where this is loaded from.
     * @param packageNode The XML element being parsed.
     * @param nsUri The namespace URI of the originating XML document, to be able to deal with
     *          parameters that vary according to the originating XML schema.
     * @param licenses The licenses loaded from the XML originating document.
     */
    public SystemImagePackage(SdkSource source,
            Node packageNode,
            String nsUri,
            Map licenses) {
        super(source, packageNode, nsUri, licenses);

        int apiLevel =
            PackageParserUtils.getXmlInt(packageNode, SdkRepoConstants.NODE_API_LEVEL, 0);
        String codeName =
            PackageParserUtils.getXmlString(packageNode, SdkRepoConstants.NODE_CODENAME);
        if (codeName.length() == 0) {
            codeName = null;
        }
        mVersion = new AndroidVersion(apiLevel, codeName);

        mAbi = PackageParserUtils.getXmlString(packageNode, SdkRepoConstants.NODE_ABI);

        // tag id
        String tagId = PackageParserUtils.getXmlString(packageNode,
                                                       SdkSysImgConstants.ATTR_TAG_ID,
                                                       SystemImage.DEFAULT_TAG.getId());
        String tagDisp = PackageParserUtils.getOptionalXmlString(packageNode,
                                                       SdkSysImgConstants.ATTR_TAG_DISPLAY);
        if (tagDisp == null || tagDisp.isEmpty()) {
            tagDisp = LocalSysImgPkgInfo.tagIdToDisplay(tagId);
        }
        assert tagId   != null;
        assert tagDisp != null;
        mTag = new IdDisplay(tagId, tagDisp);

        mPkgDesc = PkgDesc.newSysImg(mVersion, mTag, mAbi, (MajorRevision) getRevision());
    }

    @VisibleForTesting(visibility=Visibility.PRIVATE)
    public SystemImagePackage(
            AndroidVersion platformVersion,
            int revision,
            String abi,
            Properties props,
            String localOsPath) {
        this(null /*source*/, platformVersion, revision, abi, props, localOsPath);
    }

    @VisibleForTesting(visibility=Visibility.PRIVATE)
    protected SystemImagePackage(
            SdkSource source,
            AndroidVersion platformVersion,
            int revision,
            String abi,
            Properties props,
            String localOsPath) {
        super(  source,                     //source
                props,                      //properties
                revision,                   //revision
                null,                       //license
                null,                       //description
                null,                       //descUrl
                localOsPath                 //archiveOsPath
                );
        mVersion = platformVersion;
        if (abi == null && props != null) {
            abi = props.getProperty(PkgProps.SYS_IMG_ABI);
        }
        assert abi != null : "To use this SystemImagePackage constructor you must pass an ABI as a parameter or as a PROP_ABI property";
        mAbi = abi;

        mTag = LocalSysImgPkgInfo.extractTagFromProps(props);

        mPkgDesc = PkgDesc.newSysImg(mVersion, mTag, mAbi, (MajorRevision) getRevision());
    }

    /**
     * Creates a {@link BrokenPackage} representing a system image that failed to load
     * with the regular {@link SdkManager} workflow.
     *
     * @param abiDir The SDK/system-images/android-N/tag/abi folder
     * @param props The properties located in {@code abiDir} or null if not found.
     * @return A new {@link BrokenPackage} that represents this installed package.
     */
    public static Package createBroken(File abiDir, Properties props) {
        AndroidVersion version = null;
        String abiType = abiDir.getName();
        String error = null;
        IdDisplay tag = null;

        // Try to load the android version, tag & ABI from the sources.props.
        // If we don't find them, it would explain why this package is broken.
        if (props == null) {
            error = String.format("Missing file %1$s", SdkConstants.FN_SOURCE_PROP);
        } else {
            try {
                version = new AndroidVersion(props);

                tag = LocalSysImgPkgInfo.extractTagFromProps(props);
                String abi = props.getProperty(PkgProps.SYS_IMG_ABI);
                if (abi != null) {
                    abiType = abi;
                } else {
                    error = String.format("Invalid file %1$s: Missing property %2$s",
                            SdkConstants.FN_SOURCE_PROP,
                            PkgProps.SYS_IMG_ABI);
                }
            } catch (AndroidVersionException e) {
                error = String.format("Invalid file %1$s: %2$s",
                        SdkConstants.FN_SOURCE_PROP,
                        e.getMessage());
            }
        }

        try {
            // Try to parse the first number out of the platform folder name.
            // Also try to parse the tag if not known yet.
            // Folder structure should be:
            // Tools < 22.6 / API < 20: sdk/system-images/android-N/abi/
            // Tools >=22.6 / API >=20: sdk/system-images/android-N/tag/abi/
            String[] segments = abiDir.getAbsolutePath().split(Pattern.quote(File.separator));
            int len = segments.length;
            for (int i = len - 2; version == null && i >= 0; i--) {
                if (SdkConstants.FD_SYSTEM_IMAGES.equals(segments[i])) {
                    if (version == null) {
                        String platform = segments[i+1];
                        try {
                            platform = platform.replaceAll("[^0-9]+", " ").trim();  //$NON-NLS-1$ //$NON-NLS-2$
                            int pos = platform.indexOf(' ');
                            if (pos >= 0) {
                                platform = platform.substring(0, pos);
                            }
                            int apiLevel = Integer.parseInt(platform);
                            version = new AndroidVersion(apiLevel, null /*codename*/);
                        } catch (Exception ignore) {}
                    }
                    if (tag == null && i+2 < len) {
                        // If we failed to find a tag id in the properties, check whether
                        // we can guess one from the system image folder path. It should
                        // match the limited tag id character set and not be one of the
                        // known ABIs.
                        String abiOrTag = segments[i+2].trim();
                        if (abiOrTag.matches("[A-Za-z0-9_-]+")) {
                            if (Abi.getEnum(abiOrTag) == null) {
                                tag = new IdDisplay(abiOrTag,
                                                    LocalSysImgPkgInfo.tagIdToDisplay(abiOrTag));
                            }
                        }
                    }
                }
            }
        } catch (Exception ignore) {}

        if (tag == null) {
            // No tag? Use the default.
            tag = SystemImage.DEFAULT_TAG;
        }
        assert tag != null;

        StringBuilder sb = new StringBuilder(
                String.format("Broken %1$s System Image", getAbiDisplayNameInternal(abiType)));
        if (version != null) {
            sb.append(String.format(", API %1$s", version.getApiString()));
        }

        String shortDesc = sb.toString();

        if (error != null) {
            sb.append('\n').append(error);
        }

        String longDesc = sb.toString();

        IPkgDesc desc = PkgDesc.newSysImg(
                version != null ? version : new AndroidVersion(0, null),
                tag,
                abiType,
                new MajorRevision(MajorRevision.MISSING_MAJOR_REV));

        return new BrokenPackage(props, shortDesc, longDesc,
                IMinApiLevelDependency.MIN_API_LEVEL_NOT_SPECIFIED,
                version==null ? IExactApiLevelDependency.API_LEVEL_INVALID : version.getApiLevel(),
                abiDir.getAbsolutePath(),
                desc);
    }

    @Override
    @NonNull
    public IPkgDesc getPkgDesc() {
        return mPkgDesc;
    }

    /**
     * Save the properties of the current packages in the given {@link Properties} object.
     * These properties will later be given to a constructor that takes a {@link Properties} object.
     */
    @Override
    public void saveProperties(Properties props) {
        super.saveProperties(props);

        mVersion.saveProperties(props);
        props.setProperty(PkgProps.SYS_IMG_ABI,         mAbi);
        props.setProperty(PkgProps.SYS_IMG_TAG_ID,      mTag.getId());
        props.setProperty(PkgProps.SYS_IMG_TAG_DISPLAY, mTag.getDisplay());
    }

    /** Returns the tag of the system-image. */
    @NonNull
    public IdDisplay getTag() {
        return mTag;
    }

    /** Returns the ABI of the system-image. Cannot be null nor empty. */
    public String getAbi() {
        return mAbi;
    }

    /** Returns a display-friendly name for the ABI of the system-image. */
    public String getAbiDisplayName() {
        return getAbiDisplayNameInternal(mAbi);
    }

    private static String getAbiDisplayNameInternal(String abi) {
        return abi.replace("armeabi", "ARM EABI")         //$NON-NLS-1$  //$NON-NLS-2$
                  .replace("x86",     "Intel x86 Atom")   //$NON-NLS-1$  //$NON-NLS-2$
                  .replace("mips",    "MIPS")             //$NON-NLS-1$  //$NON-NLS-2$
                  .replace("-", " ");                     //$NON-NLS-1$  //$NON-NLS-2$
    }

    /**
     * Returns the version of the platform dependency of this package.
     * 

* A system-image has the same {@link AndroidVersion} as the platform it depends on. */ @Override @NonNull public AndroidVersion getAndroidVersion() { return mVersion; } /** * Returns a string identifier to install this package from the command line. * For system images, we use "sysimg-N" where N is the API or the preview codename. *

* {@inheritDoc} */ @Override public String installId() { return "sysimg-" + mVersion.getApiString(); //$NON-NLS-1$ } /** * Returns a description of this package that is suitable for a list display. *

* {@inheritDoc} */ @Override public String getListDescription() { String ld = getListDisplay(); if (!ld.isEmpty()) { return String.format("%1$s%2$s", ld, isObsolete() ? " (Obsolete)" : ""); } boolean isDefaultTag = SystemImage.DEFAULT_TAG.equals(mTag); return String.format("%1$s%2$s System Image%3$s", isDefaultTag ? "" : (mTag.getDisplay() + " "), getAbiDisplayName(), isObsolete() ? " (Obsolete)" : ""); } /** * Returns a short description for an {@link IDescription}. */ @Override public String getShortDescription() { String ld = getListDisplay(); if (!ld.isEmpty()) { return String.format("%1$s, Android API %2$s, revision %3$s%4$s", ld, mVersion.getApiString(), getRevision().toShortString(), isObsolete() ? " (Obsolete)" : ""); } boolean isDefaultTag = SystemImage.DEFAULT_TAG.equals(mTag); return String.format("%1$s%2$s System Image, Android API %3$s, revision %4$s%5$s", isDefaultTag ? "" : (mTag.getDisplay() + " "), getAbiDisplayName(), mVersion.getApiString(), getRevision().toShortString(), isObsolete() ? " (Obsolete)" : ""); } /** * Returns a long description for an {@link IDescription}. * * The long description is whatever the XML contains for the {@code description} field, * or the short description if the former is empty. */ @Override public String getLongDescription() { String s = getDescription(); if (s == null || s.length() == 0) { s = getShortDescription(); } if (s.indexOf("revision") == -1) { s += String.format("\nRevision %1$s%2$s", getRevision().toShortString(), isObsolete() ? " (Obsolete)" : ""); } s += String.format("\nRequires SDK Platform Android API %1$s", mVersion.getApiString()); return s; } /** * Computes a potential installation folder if an archive of this package were * to be installed right away in the given SDK root. *

* A system-image package is typically installed in SDK/systems/platform/tag/abi. * The name needs to be sanitized to be acceptable as a directory name. * * @param osSdkRoot The OS path of the SDK root folder. * @param sdkManager An existing SDK manager to list current platforms and addons. * @return A new {@link File} corresponding to the directory to use to install this package. */ @Override public File getInstallFolder(String osSdkRoot, SdkManager sdkManager) { File folder = new File(osSdkRoot, SdkConstants.FD_SYSTEM_IMAGES); folder = new File(folder, SystemImage.ANDROID_PREFIX + mVersion.getApiString()); // Computes a folder directory using the sanitized tag & abi strings. String tag = mTag.getId(); tag = tag.toLowerCase(Locale.US); tag = tag.replaceAll("[^a-z0-9_-]+", "_"); //$NON-NLS-1$ //$NON-NLS-2$ tag = tag.replaceAll("_+", "_"); //$NON-NLS-1$ //$NON-NLS-2$ tag = tag.replaceAll("-+", "-"); //$NON-NLS-1$ //$NON-NLS-2$ folder = new File(folder, tag); String abi = mAbi; abi = abi.toLowerCase(Locale.US); abi = abi.replaceAll("[^a-z0-9_-]+", "_"); //$NON-NLS-1$ //$NON-NLS-2$ abi = abi.replaceAll("_+", "_"); //$NON-NLS-1$ //$NON-NLS-2$ abi = abi.replaceAll("-+", "-"); //$NON-NLS-1$ //$NON-NLS-2$ folder = new File(folder, abi); return folder; } @Override public boolean sameItemAs(Package pkg) { if (pkg instanceof SystemImagePackage) { SystemImagePackage newPkg = (SystemImagePackage)pkg; // check they are the same tag, abi and version. return getTag().equals(newPkg.getTag()) && getAbi().equals(newPkg.getAbi()) && getAndroidVersion().equals(newPkg.getAndroidVersion()); } return false; } @Override public int hashCode() { final int prime = 31; int result = super.hashCode(); result = prime * result + ((mTag == null) ? 0 : mTag.hashCode()); result = prime * result + ((mAbi == null) ? 0 : mAbi.hashCode()); result = prime * result + ((mVersion == null) ? 0 : mVersion.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (!super.equals(obj)) { return false; } if (!(obj instanceof SystemImagePackage)) { return false; } SystemImagePackage other = (SystemImagePackage) obj; if (mTag == null) { if (other.mTag != null) { return false; } } else if (!mTag.equals(other.mTag)) { return false; } if (mAbi == null) { if (other.mAbi != null) { return false; } } else if (!mAbi.equals(other.mAbi)) { return false; } if (mVersion == null) { if (other.mVersion != null) { return false; } } else if (!mVersion.equals(other.mVersion)) { return false; } return true; } /** * For sys img packages, we want to add tag/abi to the sorting key * before the revision number. *

* {@inheritDoc} */ @Override protected String comparisonKey() { String s = super.comparisonKey(); int pos = s.indexOf("|r:"); //$NON-NLS-1$ assert pos > 0; s = s.substring(0, pos) + "|tag:" + getTag().getId() + //$NON-NLS-1$ "|abi:" + getAbiDisplayName() + //$NON-NLS-1$ s.substring(pos); return s; } }