/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

*/

package com.nokia.carbide.cpp.internal.api.sdk;

import java.io.File;

import java.util.Collections;

import java.util.List;

import org.eclipse.core.runtime.IPath;

import org.osgi.framework.Version;

import com.nokia.carbide.cpp.epoc.engine.preprocessor.IDefine;

import com.nokia.carbide.cpp.internal.sdk.core.model.SBSv1BuildInfo;

import com.nokia.carbide.cpp.internal.sdk.core.model.SymbianMissingSDKFactory;

import com.nokia.carbide.cpp.internal.sdk.core.model.SymbianSDK;

import com.nokia.carbide.cpp.sdk.core.IBSFCatalog;

import com.nokia.carbide.cpp.sdk.core.IBSFPlatform;

import com.nokia.carbide.cpp.sdk.core.IRVCTToolChainInfo;

import com.nokia.carbide.cpp.sdk.core.ISymbianBuildContext;

import com.nokia.carbide.cpp.sdk.core.ISymbianBuilderID;

import com.nokia.carbide.cpp.sdk.core.ISymbianSDK;

import com.nokia.carbide.cpp.sdk.core.SDKCorePlugin;

public class BuildContextSBSv1 implements ISBSv1BuildContext {

	private String sdkId;

	private String platform;

	private String target;

	private String displayString = null;

	private static String EMULATOR_DISPLAY_TEXT = "Emulator"; //$NON-NLS-1$

	private static String PHONE_DISPLAY_TEXT = "Phone"; //$NON-NLS-1$

	private static String DEBUG_DISPLAY_TEXT = "Debug"; //$NON-NLS-1$

	private static String RELEASE_DISPLAY_TEXT = "Release"; //$NON-NLS-1$

	private static String SPACE_DISPLAY_TEXT = " "; //$NON-NLS-1$

	private static String SDK_NOT_INSTALLED = "SDK not installed"; //$NON-NLS-1$

	// a copy of bad SDK default to fall back

	private static ISymbianSDK fallbackForBadSdk = SymbianMissingSDKFactory.createInstance("dummy_ID"); //$NON-NLS-1$

	public BuildContextSBSv1(ISymbianSDK theSDK, String thePlatform, String theTarget) {

		sdkId = theSDK.getUniqueId();

		platform = thePlatform.toUpperCase();

		target = theTarget.toUpperCase();

		getDisplayString();

	}

	@Override

	public int hashCode() {

		final int prime = 31;

		int result = 1;

		result = prime * result

				+ ((platform == null) ? 0 : platform.hashCode());

		result = prime * result + ((getSDK() == null) ? 0 : getSDK().getEPOCROOT().hashCode());

		result = prime * result + ((target == null) ? 0 : target.hashCode());

		return result;

	}

	@Override

	public boolean equals(Object obj) {

		if (this == obj)

			return true;

		if (obj == null)

			return false;

		if (!(obj instanceof BuildContextSBSv1))

			return false;

		final BuildContextSBSv1 other = (BuildContextSBSv1) obj;

		if (platform == null) {

			if (other.platform != null)

				return false;

		} else if (!platform.equals(other.platform))

			return false;

		if (getSDK() == null) {

			if (other.getSDK() != null)

				return false;

		} else if (!getSDK().getEPOCROOT().equals(other.getSDK().getEPOCROOT()))

			return false;

		if (target == null) {

			if (other.target != null)

				return false;

		} else if (!target.equals(other.target)) {

			return false;

		}

		return true;

	}

	public ISymbianSDK getSDK() {

		ISymbianSDK sdk = SDKCorePlugin.getSDKManager().getSDK(sdkId, true);

		if (sdk == null){

			sdk = fallbackForBadSdk;

		}

		return sdk;

	}

	public String getPlatformString() {

		return platform.toUpperCase();

	}

	public String getTargetString() {

		return target.toUpperCase();

	}

	public String getDisplayString() {

		if (displayString == null) {

			// in the form Emulation Debug (WINSCW) [S60_3rd_MR] or

			// Phone Release (GCCE) [S60_3rd_MR]

			if (platform.compareTo(EMULATOR_PLATFORM) == 0) {

				displayString = EMULATOR_DISPLAY_TEXT;

			} else {

				displayString = PHONE_DISPLAY_TEXT;

			}

			if (target.compareTo(ISymbianBuildContext.DEBUG_TARGET) == 0) {

				displayString = displayString + SPACE_DISPLAY_TEXT + DEBUG_DISPLAY_TEXT;

			} else {

				displayString = displayString + SPACE_DISPLAY_TEXT + RELEASE_DISPLAY_TEXT;

			}

			String basePlatform = platform;

			displayString = displayString + " (" + basePlatform + ") [" + getSDK().getUniqueId() + "]"; //$NON-NLS-1$

		}

		return displayString;

	}

	public static ISymbianBuildContext getBuildContextFromDisplayName(String displayName) {

		if (isValidConfigName(displayName)) {

			String sdkId = getSDKIDFromConfigName(displayName);

			ISymbianSDK sdk = SDKCorePlugin.getSDKManager().getSDK(sdkId, true);

			if (sdk == null) {

				// add a dummy should a build context ask for a removed SDK

				sdk = SDKManagerInternalAPI.addMissingSdk(sdkId);

			}

			return new BuildContextSBSv1(sdk, 

						getPlatformFromBuildConfigName(displayName), 

						getTargetFromBuildConfigName(displayName));

		}

		return new BuildContextSBSv1(fallbackForBadSdk, SDK_NOT_INSTALLED, SDK_NOT_INSTALLED);

	}

	private static String getPlatformFromBuildConfigName(String configName) {

		String[] tokens = configName.split(SPACE_DISPLAY_TEXT);

		String sdkIdToken = tokens[2];

		if (sdkIdToken.contains("_")){

			sdkIdToken = sdkIdToken.substring(1, sdkIdToken.length()-1);

			String[] aliasTokens = sdkIdToken.split("_");

			return aliasTokens[0];

		} else {

			return sdkIdToken.substring(1, sdkIdToken.length()-1);

		}

	}

	public static String getSDKIDFromConfigName(String configName) {

		int indexBegin = configName.indexOf("[");  //$NON-NLS-1$

		int indexEnd = configName.indexOf("]");  //$NON-NLS-1$

		if (indexBegin > 0 && indexEnd > 0){

			return configName.substring(indexBegin+1, indexEnd);

		} else {

			return ""; //$NON-NLS-1$

		}

	}

	private static String getTargetFromBuildConfigName(String configName) {

		String[] tokens = configName.split(SPACE_DISPLAY_TEXT);

		if (tokens[1].compareTo(DEBUG_DISPLAY_TEXT) == 0) {

			return ISymbianBuildContext.DEBUG_TARGET;

		} else {

			return ISymbianBuildContext.RELEASE_TARGET;

		}

	}

	private static boolean isValidConfigName(String configName) {

		// <Phone | Emulator> <Target> (<Platform>) [<SDK ID>]

		if (configName != null && !configName.equals("")) { //$NON-NLS-1$

			String[] tokens = configName.split(SPACE_DISPLAY_TEXT);

			if (tokens.length >= 4) {

				if (tokens[0].compareTo(EMULATOR_DISPLAY_TEXT) == 0 || tokens[0].compareTo(PHONE_DISPLAY_TEXT) == 0) {

					if (tokens[1].compareTo(DEBUG_DISPLAY_TEXT) == 0 || tokens[1].compareTo(RELEASE_DISPLAY_TEXT) == 0) {

						if (tokens[2].matches("(.*)")) { //$NON-NLS-1$

							if (tokens[3].matches("\\[.*")) { //$NON-NLS-1$

								return true;

							}

						}

					}

				}

			}

		}

		return false;

	}

	public String toString() {

		return getDisplayString();

	}

	private ISBSv1BuildInfo getBuildInfo() {

		ISBSv1BuildInfo buildInfo = (ISBSv1BuildInfo)getSDK().getBuildInfo(ISymbianBuilderID.SBSV1_BUILDER);

		if (buildInfo == null) {

			buildInfo = new SBSv1BuildInfo(getSDK());

			((SymbianSDK)getSDK()).setBuildInfo(buildInfo, ISymbianBuilderID.SBSV1_BUILDER);

		}

		return buildInfo;

	}

	public String getDefaultDefFileDirectoryName() {

		// TODO: How the ASSP option affects the path?

		String dirName = getDefFileDirectoryNameForPlatform(platform);

		if (dirName == null) {

			// check BSF's

			IBSFCatalog catalog = getBuildInfo().getBSFCatalog();

			if (catalog != null) {

	    		for (IBSFPlatform plat : catalog.getPlatforms()) {

	    			if (plat.getName().compareToIgnoreCase(platform) == 0) {

	    				String mainPlatform = catalog.getReleasePlatform(platform);

	    				if (mainPlatform != null) {

	    					dirName = getDefFileDirectoryNameForPlatform(mainPlatform);

	    					if (dirName == null || dirName.length() < 1) {

	    						// fallback - all BSF's should be EABI anyway

			    				return "EABI"; //$NON-NLS-1$

	    					}

	    				}

	    			}

	    		}

	    	}

		}

		if (dirName == null) {

			// fallback for unknown cases

			dirName = platform;

		}

		return dirName;

	}

	private String getDefFileDirectoryNameForPlatform(String platform) {

		if (platform.equals(EMULATOR_PLATFORM)) {

			return "BWINS"; //$NON-NLS-1$

		} else if (platform.equals(ARMV5_PLATFORM)

					|| platform.equals(ARMV5_ABIV2_PLATFORM)

					|| platform.equals(ARMV6_PLATFORM)

					|| platform.equals(ARMV6_ABIV2_PLATFORM)

					|| platform.equals(GCCE_PLATFORM)) {

			return "EABI"; //$NON-NLS-1$

		}

		return null;

	}

	public IPath getCompilerPrefixFile() {

		if (platform.equals(GCCE_PLATFORM)) {

			return getGCCEPrefixFilePath();

		} else if (platform.equals(ARMV5_PLATFORM)

					|| platform.equals(ARMV5_ABIV2_PLATFORM)

					|| platform.equals(ARMV6_PLATFORM)

					|| platform.equals(ARMV6_ABIV2_PLATFORM)) {

			return getRVCTPrefixFilePath();

		} else {

			// check BSF's

			IBSFCatalog catalog = getBuildInfo().getBSFCatalog();

	    	if (catalog != null) {

	    		for (IBSFPlatform plat : catalog.getPlatforms()) {

	    			if (plat.getName().compareToIgnoreCase(platform) == 0) {

	    				String mainPlatform = catalog.getReleasePlatform(platform);

	    				if (mainPlatform != null) {

	    					if (mainPlatform.equals(GCCE_PLATFORM)) {

	    						return getGCCEPrefixFilePath();

	    					} else if (mainPlatform.equals(ARMV5_PLATFORM) 

	    								|| mainPlatform.equals(ARMV5_ABIV2_PLATFORM)

	    								|| mainPlatform.equals(ARMV6_PLATFORM)

	    								|| mainPlatform.equals(ARMV6_ABIV2_PLATFORM)) {

	    						return getRVCTPrefixFilePath();

	    					} else {

	    						// fallback - all BSF's should be EABI anyway

	    						return getRVCTPrefixFilePath();

	    					}

	    				}

	    			}

	    		}

	    	}

		}

		// fallback for WINSCW, MSVC, etc.

		return null;

	}

	private IPath getIncludePath() {

		return getSDK().getIncludePath();

	}

	private IPath getGCCEPrefixFilePath() {

		return getIncludePath().append("gcce/gcce.h"); //$NON-NLS-1$

	}

	private IPath getRVCTPrefixFilePath() {

		IRVCTToolChainInfo[] installedRVCTTools = SDKCorePlugin.getSDKManager().getInstalledRVCTTools();

		// use default in case tools aren't installed

		String rvctFragment = "rvct2_2"; //$NON-NLS-1$

		if (installedRVCTTools.length > 0) {

			rvctFragment = getRVCTFragment(installedRVCTTools[0]);

		}

		IPath prefixFilePath = getIncludePath().append(rvctFragment).append(rvctFragment + ".h"); //$NON-NLS-1$

		if (prefixFilePath.toFile().exists()){

			return prefixFilePath;

		} else {

			// SF kits around SF^3 started to only use a single rvct.h header instead of specific versioned ones

			// based on the default installation

			return getIncludePath().append("rvct").append("rvct" + ".h");

		}

	}

	private String getRVCTFragment(IRVCTToolChainInfo info) {

		int major = 0, minor = 0;

		if (info != null) {

			Version rvctToolsVersion = info.getRvctToolsVersion();

			if (rvctToolsVersion != null) {

				major = info.getRvctToolsVersion().getMajor();

				minor = info.getRvctToolsVersion().getMinor();

			}

		}

		return "rvct" + major + "_" + minor; //$NON-NLS-1$ //$NON-NLS-2$

	}

	public List<IDefine> getVariantHRHDefines() {

		return getCachedData().getVariantHRHDefines();

	}

	public List<File> getPrefixFileIncludes() {

		return getCachedData().getPrefixFileIncludes();

	}

	public List<IDefine> getCompilerMacros() {

		// we parse the compiler prefix file to gather macros.  this can be time consuming so do it

		// once and cache the values.  only reset the cache when the compiler prefix has changed.

		IPath prefixFile = getCompilerPrefixFile();

		if (prefixFile == null) {

			return Collections.emptyList();

		}

		return getCachedData().getCompilerMacros(prefixFile);

	}

	public String getBuildVariationName() {

		String varName = "";

		String[] tokens = getPlatformString().split("\\.");

		if (tokens.length == 2){

			varName = tokens[1];

		}

		return varName;

	}

	public boolean isSymbianBinaryVariation() {

		if (getPlatformString().split("\\.").length == 2){

			return true;

		} else {

			return false;

		}

	}

	/**

	 * Get the cache holding the data that applies to this build context globally.

	 * A build context is subclassed by CarbideBuildConfiguration, which has multiple

	 * instances at runtime, thus, a SymbianBuildContext instance should not hold a cache itself.

	 * @return cache, never <code>null</code>

	 */

	private SymbianBuildContextDataCache getCachedData() {

		return SymbianBuildContextDataCache.getCache(this);

	}

	public String getBasePlatformForVariation() {

		String plat = "";

		String[] tokens = getPlatformString().split("\\.");

		if (tokens.length == 2){

			plat = tokens[0];

		} else {

			return platform;

		}

		return plat;

	}

	/**

	 * Get the list of #include paths detected for this context.

	 * @return List or <code>null</code>

	 */

	public List<File> getCachedSystemIncludePaths() {

		return getCachedData().getSystemIncludePaths();

	}