/*
 * 
 * Copyright 2001-2004 The Ant-Contrib 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 net.sf.antcontrib.cpptasks;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.Enumeration;
import java.util.Vector;

import net.sf.antcontrib.cpptasks.compiler.CommandLineCompiler;
import net.sf.antcontrib.cpptasks.compiler.Compiler;
import net.sf.antcontrib.cpptasks.compiler.Processor;
import net.sf.antcontrib.cpptasks.gcc.GccCCompiler;
import net.sf.antcontrib.cpptasks.types.CompilerArgument;
import net.sf.antcontrib.cpptasks.types.ConditionalPath;
import net.sf.antcontrib.cpptasks.types.DefineSet;
import net.sf.antcontrib.cpptasks.types.IncludePath;
import net.sf.antcontrib.cpptasks.types.SystemIncludePath;
import net.sf.antcontrib.cpptasks.types.UndefineArgument;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.types.EnumeratedAttribute;
import org.apache.tools.ant.*;
/**
 * A compiler definition. compiler elements may be placed either as children of
 * a cc element or the project element. A compiler element with an id attribute
 * may be referenced from compiler elements with refid or extends attributes.
 * 
 * @author Adam Murdoch
 */
public final class CompilerDef extends ProcessorDef {
    /**
     * Enumerated attribute with the values "none", "severe", "default",
     * "production", "diagnostic", and "failtask".
     */
    public static class WarningLevel extends EnumeratedAttribute {
        public String[] getValues() {
            return new String[]{"none", "severe", "default", "production",
                    "diagnostic", "aserror"};
        }
    }
    /** The source file sets. */
    private final Vector defineSets = new Vector();
    private Boolean exceptions;
    private Boolean rtti;
    private final Vector includePaths = new Vector();
    private Boolean multithreaded;
    private final Vector precompileDefs = new Vector();
    private final Vector sysIncludePaths = new Vector();
    private OptimizationEnum optimization;
    private int warnings = -1;
    private Boolean defaultflag = new Boolean(true);
    public CompilerDef() {
    }
    /**
     * Adds a compiler command-line arg.
     */
    public void addConfiguredCompilerArg(CompilerArgument arg) {
        if (isReference()) {
            throw noChildrenAllowed();
        }
        addConfiguredProcessorArg(arg);
    }
    /**
     * Adds a compiler command-line arg.
     */
    public void addConfiguredCompilerParam(CompilerParam param) {
        if (isReference()) {
            throw noChildrenAllowed();
        }
        addConfiguredProcessorParam(param);
    }
    /**
     * Adds a defineset.
     */
    public void addConfiguredDefineset(DefineSet defs) {
        if (defs == null) {
            throw new NullPointerException("defs");
        }
        if (isReference()) {
            throw noChildrenAllowed();
        }
        defineSets.addElement(defs);
    }
    /**
     * Creates an include path.
     */
    public IncludePath createIncludePath() {
        Project p = getProject();
        if (p == null) {
            throw new java.lang.IllegalStateException("project must be set");
        }
        if (isReference()) {
            throw noChildrenAllowed();
        }
        IncludePath path = new IncludePath(p);
        includePaths.addElement(path);
        return path;
    }
    /**
     * Add a <includepath>or <sysincludepath> if specify the file 
     * attribute
     * 
     * @throws BuildException
     *             if the specify file not exist
     */
    protected void loadFile(Vector activePath,File file) throws BuildException {
        FileReader fileReader;
        BufferedReader in;
        String str;
        if (! file.exists()){
            throw new BuildException("The file " + file + " is not existed");
        }
        try {
            fileReader = new FileReader(file);
            in = new BufferedReader(fileReader);
            while ( (str = in.readLine()) != null ){                
                if(str.trim() == ""){
                    continue ;
                }
                str = getProject().replaceProperties(str);
                activePath.addElement(str.trim());
            }
        }
        catch(Exception e){
            throw new BuildException(e.getMessage());
        }
    }
    
    /**
     * Specifies precompilation prototype file and exclusions.
     *  
     */
    public PrecompileDef createPrecompile() throws BuildException {
    	Project p = getProject();
        if (isReference()) {
            throw noChildrenAllowed();
        }
        PrecompileDef precomp = new PrecompileDef();
        precomp.setProject(p);
        precompileDefs.addElement(precomp);
        return precomp;
    }
    /**
     * Creates a system include path. Locations and timestamps of files located
     * using the system include paths are not used in dependency analysis.
     * 
     * 
     * Standard include locations should not be specified. The compiler
     * adapters should recognized the settings from the appropriate environment
     * variables or configuration files.
     */
    public SystemIncludePath createSysIncludePath() {
    	Project p = getProject();
        if (p == null) {
            throw new java.lang.IllegalStateException("project must be set");
        }
        if (isReference()) {
            throw noChildrenAllowed();
        }
        SystemIncludePath path = new SystemIncludePath(p);
        sysIncludePaths.addElement(path);
        return path;
    }
    public void execute() throws org.apache.tools.ant.BuildException {
        throw new org.apache.tools.ant.BuildException(
                "Not an actual task, but looks like one for documentation purposes");
    }
    public UndefineArgument[] getActiveDefines() {
    	Project p = getProject();
        if (p == null) {
            throw new java.lang.IllegalStateException(
                    "project must be set before this call");
        }
        if (isReference()) {
            return ((CompilerDef) getCheckedRef(CompilerDef.class,
                    "CompilerDef")).getActiveDefines();
        }
        Vector actives = new Vector();
        for (int i = 0; i < defineSets.size(); i++) {
            DefineSet currentSet = (DefineSet) defineSets.elementAt(i);
            UndefineArgument[] defines = currentSet.getDefines();
            for (int j = 0; j < defines.length; j++) {
                if (defines[j].isActive(p)) {
                    actives.addElement(defines[j]);
                }
            }
        }
        UndefineArgument[] retval = new UndefineArgument[actives.size()];
        actives.copyInto(retval);
        return retval;
    }
    /**
     * Returns the compiler-specific include path.
     */
    public String[] getActiveIncludePaths() {
        if (isReference()) {
            return ((CompilerDef) getCheckedRef(CompilerDef.class,
                    "CompilerDef")).getActiveIncludePaths();
        }
        return getActivePaths(includePaths);
    }
    private String[] getActivePaths(Vector paths) {
    	Project p = getProject();
        if (p == null) {
            throw new java.lang.IllegalStateException("project not set");
        }
        Vector activePaths = new Vector(paths.size());
        for (int i = 0; i < paths.size(); i++) {
            ConditionalPath path = (ConditionalPath) paths.elementAt(i);
            if (path.isActive(p)) {
                if (path.getFile() == null) {
                    String[] pathEntries = path.list();
                    for (int j = 0; j < pathEntries.length; j++) {
                        activePaths.addElement(pathEntries[j]);
                    }
                }
                else {
                    loadFile(activePaths, path.getFile());
                }
            }
        }
        String[] pathNames = new String[activePaths.size()];
        activePaths.copyInto(pathNames);
        return pathNames;
    }
    public PrecompileDef getActivePrecompile(CompilerDef ccElement) {
        if (isReference()) {
            return ((CompilerDef) getCheckedRef(CompilerDef.class,
                    "CompilerDef")).getActivePrecompile(ccElement);
        }
        PrecompileDef current = null;
        Enumeration enumPrecompilerDef = precompileDefs.elements();
        while (enumPrecompilerDef.hasMoreElements()) {
            current = (PrecompileDef) enumPrecompilerDef.nextElement();
            if (current.isActive()) {
                return current;
            }
        }
        CompilerDef extendedDef = (CompilerDef) getExtends();
        if (extendedDef != null) {
            current = extendedDef.getActivePrecompile(null);
            if (current != null) {
                return current;
            }
        }
        if (ccElement != null && getInherit()) {
            return ccElement.getActivePrecompile(null);
        }
        return null;
    }
    public String[] getActiveSysIncludePaths() {
        if (isReference()) {
            return ((CompilerDef) getCheckedRef(CompilerDef.class,
                    "CompilerDef")).getActiveSysIncludePaths();
        }
        return getActivePaths(sysIncludePaths);
    }
    public final boolean getExceptions(CompilerDef[] defaultProviders, int index) {
        if (isReference()) {
            return ((CompilerDef) getCheckedRef(CompilerDef.class,
                    "CompilerDef")).getExceptions(defaultProviders, index);
        }
        if (exceptions != null) {
            return exceptions.booleanValue();
        } else {
            if (defaultProviders != null && index < defaultProviders.length) {
                return defaultProviders[index].getExceptions(defaultProviders,
                        index + 1);
            }
        }
        return false;
    }
    public final Boolean getRtti(CompilerDef[] defaultProviders, int index) {
        if (isReference()) {
            return ((CompilerDef) getCheckedRef(CompilerDef.class,
                    "CompilerDef")).getRtti(defaultProviders, index);
        }
        if (rtti != null) {
            return rtti;
        } else {
            if (defaultProviders != null && index < defaultProviders.length) {
                return defaultProviders[index].getRtti(defaultProviders,
                        index + 1);
            }
        }
        return null;
    }
    public final Boolean getDefaultflag(CompilerDef[] defaultProviders, int index) {
        if (isReference()) {
            return ((CompilerDef) getCheckedRef(CompilerDef.class,
                  "CompilerDef")).getDefaultflag(defaultProviders, index);
        }
        return defaultflag;
    }
    public final OptimizationEnum getOptimization(CompilerDef[] defaultProviders, int index) {
        if (isReference()) {
            return ((CompilerDef) getCheckedRef(CompilerDef.class,
                    "CompilerDef")).getOptimization(defaultProviders, index);
        }
        if (optimization != null) {
            return optimization;
        } else {
            if (defaultProviders != null && index < defaultProviders.length) {
                return defaultProviders[index].getOptimization(defaultProviders,
                        index + 1);
            }
        }
        return null;
    }
    
    public boolean getMultithreaded(CompilerDef[] defaultProviders, int index) {
        if (isReference()) {
            return ((CompilerDef) getCheckedRef(CompilerDef.class,
                    "CompilerDef")).getMultithreaded(defaultProviders, index);
        }
        if (multithreaded != null) {
            return multithreaded.booleanValue();
        } else {
            if (defaultProviders != null && index < defaultProviders.length) {
                return defaultProviders[index].getMultithreaded(
                        defaultProviders, index + 1);
            }
        }
        return true;
    }
    public Processor getProcessor() {
        Processor processor = super.getProcessor();
        if (processor == null) {
            processor = GccCCompiler.getInstance();
        }
        if (getLibtool() && processor instanceof CommandLineCompiler) {
            CommandLineCompiler compiler = (CommandLineCompiler) processor;
            processor = compiler.getLibtoolCompiler();
        }
        return processor;
    }
    public int getWarnings(CompilerDef[] defaultProviders, int index) {
        if (isReference()) {
            return ((CompilerDef) getCheckedRef(CompilerDef.class,
                    "CompilerDef")).getWarnings(defaultProviders, index);
        }
        if (warnings == -1) {
            if (defaultProviders != null && index < defaultProviders.length) {
                return defaultProviders[index].getWarnings(defaultProviders,
                        index + 1);
            }
        }
        return warnings;
    }
    /**
     * Sets the default compiler adapter. Use the "name" attribute when the
     * compiler is a supported compiler.
     * 
     * @param classname
     *            fully qualified classname which implements CompilerAdapter
     */
    public void setClassname(String classname) throws BuildException {
        if (isReference()) {
            throw tooManyAttributes();
        }
        super.setClassname(classname);
        Processor proc = getProcessor();
        if (!(proc instanceof Compiler)) {
            throw new BuildException(classname + " does not implement Compiler");
        }
    }
    /**
     * Enables or disables exception support.
     * 
     * @param exceptions
     *            if true, exceptions are supported.
     *  
     */
    public void setExceptions(boolean exceptions) {
        if (isReference()) {
            throw tooManyAttributes();
        }
        this.exceptions = booleanValueOf(exceptions);
    }

    /**
     * Enables or disables run-time type information.
     * 
     * @param rtti
     *            if true, run-time type information is supported.
     *  
     */
    public void setRtti(boolean rtti) {
        if (isReference()) {
            throw tooManyAttributes();
        }
        this.rtti = booleanValueOf(rtti);
    }
    
    /**
     * Enables or disables generation of multithreaded code. Unless specified,
     * multithreaded code generation is enabled.
     * 
     * @param multi
     *            If true, generated code may be multithreaded.
     */
    public void setMultithreaded(boolean multithreaded) {
        if (isReference()) {
            throw tooManyAttributes();
        }
        this.multithreaded = booleanValueOf(multithreaded);
    }
    /**
     * Sets compiler type.
     * 
     * 
     * <table width="100%" border="1"> <thead>Supported compilers </thead>
     * <tr>
     * <td>gcc (default)</td>
     * <td>GCC C++ compiler</td>
     * </tr>
     * <tr>
     * <td>g++</td>
     * <td>GCC C++ compiler</td>
     * </tr>
     * <tr>
     * <td>c++</td>
     * <td>GCC C++ compiler</td>
     * </tr>
     * <tr>
     * <td>g77</td>
     * <td>GNU Fortran compiler</td>
     * </tr>
     * <tr>
     * <td>msvc</td>
     * <td>Microsoft Visual C++</td>
     * </tr>
     * <tr>
     * <td>bcc</td>
     * <td>Borland C++ Compiler</td>
     * </tr>
     * <tr>
     * <td>msrc</td>
     * <td>Microsoft Resource Compiler</td>
     * </tr>
     * <tr>
     * <td>brc</td>
     * <td>Borland Resource Compiler</td>
     * </tr>
     * <tr>
     * <td>df</td>
     * <td>Compaq Visual Fortran Compiler</td>
     * </tr>
     * <tr>
     * <td>midl</td>
     * <td>Microsoft MIDL Compiler</td>
     * </tr>
     * <tr>
     * <td>icl</td>
     * <td>Intel C++ compiler for Windows (IA-32)</td>
     * </tr>
     * <tr>
     * <td>ecl</td>
     * <td>Intel C++ compiler for Windows (IA-64)</td>
     * </tr>
     * <tr>
     * <td>icc</td>
     * <td>Intel C++ compiler for Linux (IA-32)</td>
     * </tr>
     * <tr>
     * <td>ecc</td>
     * <td>Intel C++ compiler for Linux (IA-64)</td>
     * </tr>
     * <tr>
     * <td>CC</td>
     * <td>Sun ONE C++ compiler</td>
     * </tr>
     * <tr>
     * <td>aCC</td>
     * <td>HP aC++ C++ Compiler</td>
     * </tr>
     * <tr>
     * <td>os390</td>
     * <td>OS390 C Compiler</td>
     * </tr>
     * <tr>
     * <td>os400</td>
     * <td>Icc Compiler</td>
     * </tr>
     * <tr>
     * <td>sunc89</td>
     * <td>Sun C89 C Compiler</td>
     * </tr>
     * <tr>
     * <td>xlC</td>
     * <td>VisualAge C Compiler</td>
     * </tr>
     * </table>
     *  
     */
    public void setName(CompilerEnum name) throws BuildException {
        if (isReference()) {
            throw tooManyAttributes();
        }
        Compiler compiler = name.getCompiler();
        setProcessor(compiler);
    }
    protected void setProcessor(Processor proc) throws BuildException {
        try {
            super.setProcessor((Compiler) proc);
        } catch (ClassCastException ex) {
            throw new BuildException(ex);
        }
    }
    /**
     * Enumerated attribute with the values "none", "severe", "default",
     * "production", "diagnostic", and "failtask".
     */
    public void setWarnings(CompilerDef.WarningLevel level) {
        warnings = level.getIndex();
    }
    /**
     * Sets optimization level.
     * 
     * @param value optimization level
     */
    public void setOptimize(OptimizationEnum value) {
    	if (isReference()) {
    		throw tooManyAttributes();
    	}
    	this.optimization = value;
    }
    /**
     * Enables or disables default flags.
     * 
     * @param defaultflag
     *            if true, default flags will add to command line.
     *  
     */
    public void setDefaultflag(boolean defaultflag) {
        if (isReference()) {
            throw tooManyAttributes();
        }
        this.defaultflag = booleanValueOf(defaultflag);
    }
}
