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.SBSv2BuildInfo;

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.ISBSv2BuildContext;

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;

import com.nokia.cpp.internal.api.utils.core.Check;

public class BuildContextSBSv2 implements ISBSv2BuildContext {

	private String platform;

	private String target;

	private String sbsv2Alias;

	private ISymbianSDK sdk;

	private String displayString;

	private String configID;  // cconfiguration 'id' attribute from .cproject

	public BuildContextSBSv2(ISymbianSDK theSDK, String thePlatform, String theTarget, String theSBSv2Alias, String displayName, String configID) {

		this.sdk = theSDK;

		this.platform = thePlatform.toUpperCase();

		this.target = theTarget.toUpperCase();

		this.sbsv2Alias = theSBSv2Alias;

		this.displayString = displayName;

		this.configID = configID;

	}

	@Override

	public ISymbianSDK getSDK() {

		return sdk;

	}

	@Override

	public String getPlatformString() {

		return platform;

	}

	@Override

	public String getTargetString() {

		return target;

	}

	public String getConfigID(){

		return configID;

	}

	@Override

	public String getDisplayString() {

		Check.checkState(displayString != null);

		return displayString;

	}

	private ISBSv2BuildInfo getBuildInfo() {

		ISBSv2BuildInfo buildInfo = (ISBSv2BuildInfo)getSDK().getBuildInfo(ISymbianBuilderID.SBSV2_BUILDER);

		if (buildInfo == null) {

			buildInfo = new SBSv2BuildInfo();

			((SymbianSDK)getSDK()).setBuildInfo(buildInfo, ISymbianBuilderID.SBSV2_BUILDER);

		}

		return buildInfo;

	}

	@Override

	public String toString() {

		return getConfigID();

	}

	@Override

	public String getDefaultDefFileDirectoryName(boolean isASSP) {

		// TOOD: THIS IS ABLD STUFF. isASSP does not belong with Raptor

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

		String dirName = getDefFileDirectoryNameForPlatform(platform);

		if (dirName == null) {

			// check BSF's

			IBSFCatalog catalog = getBuildInfo().getBSFCatalog(getSDK());

	    	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) {

		// TODO: This is still ABLD stype stuff

		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;

	}

	@Override

	public IPath getCompilerPrefixFile() {

		// TODO: This is ABLD hard-code mechanism. Should be able to get from Raptor query mechanism

		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(getSDK());

	    	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 getBuildInfo().getIncludePath(getSDK());

	}

	private IPath getGCCEPrefixFilePath() {

		// TOOD: Should get from Raptor query when available

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

	}

	private IPath getRVCTPrefixFilePath() {

		// TODO: Should get this from query mechanism

		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) {

		// TODO: This should not be needed when raptor query is complete

		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; //$NON-NLS-1$ //$NON-NLS-2$

	}

	@Override

	public List<IDefine> getVariantHRHDefines() {

		// TODO: Should get from raptor query

		return getCachedData().getVariantHRHDefines();

	}

	@Override

	public List<File> getPrefixFileIncludes() {

		// TODO: Should get from raptor query

		return getCachedData().getPrefixFileIncludes();

	}

	@Override

	public List<IDefine> getCompilerMacros() {

		// TODO: Should get from raptor query

		// 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);

	}

	@Override

	public String getBuildVariationName() {

		// TODO: This should not be needed for Raptor

		return "";

	}

	@Override

	public boolean isSymbianBinaryVariation() {

		// This should not be needed for Raptor. We do need a check

		// in the MPP for the featurevariant keyword perhaps

		return false;

	}

	/**

	 * See if the build configuration is an SBSv2 alias, and if so get the build-able alias name 

	 * @param displayName

	 * @return The full SBSv2 alias that can be used with -c, otherwise null if not SBSv2

	 */

	private static String getSBSv2AliasFromConfigName(String displayName) {

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

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

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

			String configPart =  displayName.substring(indexBegin+1, indexEnd);

			if (configPart.split("_").length > 1){

				return configPart;

			}

		} 

		return null;

	}

	@Override

	public String getSBSv2Alias() {

		return sbsv2Alias;

	}

	/**

	 * 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() {

		// TODO: Still need to consider this for SBSv2 refactoring / Raptor query

		return SymbianBuildContextDataCache.getCache(this);

	}

	/**

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

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

	 */

	public List<File> getCachedSystemIncludePaths() {

		// TODO: Still need to consider this for SBSv2 refactoring / Raptor query

		return getCachedData().getSystemIncludePaths();

	}

	@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 BuildContextSBSv2))

			return false;

		final BuildContextSBSv2 other = (BuildContextSBSv2) obj;

		if (sbsv2Alias == null) {

			if (other.sbsv2Alias != null)

				return false;

		} else if (!sbsv2Alias.equals(other.sbsv2Alias))

			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;

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

			// TODO: Do we really need anything other than a config ID comparison?

			return false;

		}

		return true;

	}

	public static String getPlatformFromV1ConfigName(String displayString) {

		String[] tokens = displayString.split(" ");

		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 getTargetFromV1ConfigName(String displayString) {

		String[] tokens = displayString.split(" ");

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

			return ISymbianBuildContext.DEBUG_TARGET;

		} else {

			return ISymbianBuildContext.RELEASE_TARGET;

		}

	}

	public static String getBuildAliasFromV1ConfigName(String displayString) {

		String target = getTargetFromV1ConfigName(displayString);

		String platform = getPlatformFromV1ConfigName(displayString);

		return platform.toLowerCase() + "_" + target.toLowerCase();

	}

	// Fall-back to get SDK id from old config name

	public static String getSDKIDFromV1ConfigName(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 ""; //$NON-NLS-1$

		}

	}

}