//
// $Id$
//
// Narya library - tools for developing networked games
// Copyright (C) 2002-2010 Three Rings Design, Inc., All Rights Reserved
// http://code.google.com/p/narya/
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published
// by the Free Software Foundation; either version 2.1 of the License, or
// (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

package com.threerings.presents.tools;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;

import com.google.common.collect.Lists;
import com.google.common.collect.Sets;

import com.samskivert.util.StringUtil;

import com.threerings.util.ActionScript;

/**
 * Primitively parses an ActionScriptSource file, allows the addition and replacement of class
 * members and handles writing out the file again.
 */
public class ActionScriptSource
{
    /**
     * Contains the name and text of a particular member declaration.
     */
    public static class Member
    {
        public String name;
        public String comment = "";
        public String definition;
        public String body = "";
        public boolean noreplace = false;

        public Member (String name, String definition) {
            this.name = name;
            this.definition = definition;
        }

        public void setInitialValue (String initValue) {
            // if we're a typed array and we're being set to "new Something[0]" then convert that
            if (definition.indexOf("TypedArray") != -1) {
                Matcher m = ARRAYINIT.matcher(initValue);
                if (m.matches()) {
                    initValue = "TypedArray.create(" + m.group(1) + ")";
                }
            }

            // do not-very-smart array conversion
            initValue = initValue.replaceAll("\\{", "[");
            initValue = initValue.replaceAll("\\}", "]");

            // stick the initial value before the semicolon
            definition = definition.substring(0, definition.length()-1) + " = " + initValue + ";";
        }

        public void setComment (String newComment) {
            if (newComment.indexOf("@Override") != -1) {
                newComment = newComment.replaceAll("@Override ?", "");
                // handle // @Override // comment
                newComment = newComment.replaceFirst("// //", "//");
                definition = "override " + definition;
            }
            // trim blank lines from start
            while (newComment.startsWith("\n")) {
                newComment = newComment.substring(1);
            }
            comment = StringUtil.isBlank(newComment) ? "" : newComment;
        }

        public void write (PrintWriter writer) {
            writer.print(comment);
            writer.println("    " + definition);
            writer.print(body);
        }
    }

    public String preamble = "";

    public String packageName;

    public Set<String> imports = Sets.newHashSet();

    public String classComment = "";

    public boolean isAbstract;

    public String className;

    public String superClassName;

    public String[] implementedInterfaces;

    public ArrayList<Member> publicConstants = Lists.newArrayList();

    public ArrayList<Member> publicFields = Lists.newArrayList();

    public ArrayList<Member> publicStaticMethods = Lists.newArrayList();

    public ArrayList<Member> publicConstructors = Lists.newArrayList();

    public ArrayList<Member> publicMethods = Lists.newArrayList();

    public ArrayList<Member> protectedConstructors = Lists.newArrayList();

    public ArrayList<Member> protectedMethods = Lists.newArrayList();

    public ArrayList<Member> protectedStaticMethods = Lists.newArrayList();

    public ArrayList<Member> protectedFields = Lists.newArrayList();

    public ArrayList<Member> protectedConstants = Lists.newArrayList();

    public static String toSimpleName (String name)
    {
        name = name.substring(name.lastIndexOf(".")+1);
        // inner classes are not supported by ActionScript so we _
        name = name.replaceAll("\\$", "_");
        return name;
    }

    /**
     * Creates and returns a declaration for a field equivalent to the supplied Java field in
     * ActionScript.
     */
    public String createActionScriptDeclaration (String name, Field field, ActionScript asa)
    {
        int mods = field.getModifiers();
        StringBuilder builder = new StringBuilder();

        // what's our visibility?
        if (Modifier.isPublic(mods)) {
            builder.append("public ");
        } else if (Modifier.isProtected(mods)) {
            builder.append("protected ");
        } else if (Modifier.isPrivate(mods)) {
            builder.append("private ");
        }

        // are we static?
        if (Modifier.isStatic(mods)) {
            builder.append("static ");
        }

        // const or variable?
        builder.append(Modifier.isFinal(mods) ? "const " : "var ");

        // next comes the name
        builder.append(name).append(" :");

        // now convert the type to an ActionScript type
        if (asa != null && !StringUtil.isBlank(asa.type())) {
            builder.append(asa.type());
        } else {
            builder.append(toActionScriptType(field.getType(), !Modifier.isStatic(mods)));
        }

        builder.append(";");

        return builder.toString();
    }

    public String createActionScriptDeclaration (Constructor<?> ctor, boolean needsNoArg)
    {
        int mods = ctor.getModifiers();
        StringBuilder builder = new StringBuilder();

        // what's our visibility?
        if (Modifier.isPublic(mods)) {
            builder.append("public ");
        } else if (Modifier.isProtected(mods)) {
            builder.append("protected ");
        } else if (Modifier.isPrivate(mods)) {
            builder.append("private ");
        }

        // all constructors are functions
        builder.append("function ");

        // next comes the name
        builder.append(toSimpleName(ctor.getName())).append(" (");

        // now the parameters
        int idx = 0;
        for (Class<?> ptype : ctor.getParameterTypes()) {
            if (idx++ > 0) {
                builder.append(", ");
            }
            builder.append("arg").append(idx);
            builder.append(" :").append(toActionScriptType(ptype, false));
            if (needsNoArg) {
                builder.append(" = undef");
            }
        }
        builder.append(")");

        return builder.toString();
    }

    public String createActionScriptDeclaration (String name, Method method)
    {
        int mods = method.getModifiers();
        StringBuilder builder = new StringBuilder();

        // TODO: override

        // what's our visibility?
        if (Modifier.isPublic(mods)) {
            builder.append("public ");
        } else if (Modifier.isProtected(mods)) {
            builder.append("protected ");
        } else if (Modifier.isPrivate(mods)) {
            builder.append("private ");
        }

        // are we static const or variable?
        if (Modifier.isStatic(mods)) {
            builder.append("static ");
        }
        builder.append("function ");

        // next comes the name
        builder.append(name).append(" (");

        // now the parameters
        int idx = 0;
        for (Class<?> ptype : method.getParameterTypes()) {
            if (idx++ > 0) {
                builder.append(", ");
            }
            builder.append("arg").append(idx);
            builder.append(" :").append(toActionScriptType(ptype, false));
        }
        builder.append(") :");

        builder.append(toActionScriptType(method.getReturnType(), false));

        return builder.toString();
    }

    public String toActionScriptType (Class<?> type, boolean isField)
    {
        if (type.isArray()) {
            if (Byte.TYPE.equals(type.getComponentType())) {
                imports.add("flash.utils.ByteArray");
                return "ByteArray";
            }
            if (isField) {
                imports.add("com.threerings.io.TypedArray");
                return "TypedArray";
            }
            return "Array";
        }

        if (Integer.TYPE.equals(type) ||
            Byte.TYPE.equals(type) ||
            Short.TYPE.equals(type) ||
            Character.TYPE.equals(type)) {
            return "int";
        }

        if (Float.TYPE.equals(type) ||
            Double.TYPE.equals(type)) {
            return "Number";
        }

        if (Long.TYPE.equals(type)) {
            imports.add("com.threerings.util.Long");
            return "Long";
        }

        if (Boolean.TYPE.equals(type)) {
            return "Boolean";
        }

        if (!String.class.equals(type)) {
            imports.add(type.getName());
        }
        return toSimpleName(type.getName());
    }

    public ActionScriptSource (Class<?> jclass)
    {
        packageName = jclass.getPackage().getName();
        className = jclass.getName().substring(packageName.length()+1);
        Class<?> sclass = jclass.getSuperclass();
        if (sclass != null && !sclass.getName().equals("java.lang.Object")) {
            superClassName = toSimpleName(sclass.getName());
        }
        isAbstract = ((jclass.getModifiers() & Modifier.ABSTRACT) != 0);

        // note our implemented interfaces
        ArrayList<String> ifaces = Lists.newArrayList();
        for (Class<?> iclass : jclass.getInterfaces()) {
            // we cannot use the FooCodes interface pattern in ActionScript so we just nix it
            if (iclass.getName().endsWith("Codes")) {
                continue;
            }
            // we also nix Serializable and IsSerializable (hackity hack)
            if (iclass.getName().endsWith("Serializable")) {
                continue;
            }
            ifaces.add(toSimpleName(iclass.getName()));
        }

        // convert the field members
        for (Field field : jclass.getDeclaredFields()) {
            int mods = field.getModifiers();
            ArrayList<Member> list;
            if (Modifier.isStatic(mods)) {
                list = Modifier.isPublic(mods) ? publicConstants : protectedConstants;
            } else {
                list = Modifier.isPublic(mods) ? publicFields : protectedFields;
            }
            String name = field.getName();
            ActionScript asa = field.getAnnotation(ActionScript.class);
            if (asa != null) {
                if (asa.omit()) {
                    continue;
                }
                if (!StringUtil.isBlank(asa.name())) {
                    name = asa.name();
                }
            }
            String decl = createActionScriptDeclaration(name, field, asa);
            list.add(new Member(name, decl));
        }

      METHODS:
        for (Method method : jclass.getDeclaredMethods()) {
            int mods = method.getModifiers();
            ArrayList<Member> list;
            if (Modifier.isStatic(mods)) {
                list = Modifier.isPublic(mods) ?
                    publicStaticMethods : protectedStaticMethods;
            } else {
                list = Modifier.isPublic(mods) ?
                    publicMethods : protectedMethods;
            }

            String name = method.getName();

            // we have to scan our parent classes for annotations because we may be overriding this
            // method and we want to "inherit" annotations
            Class<?> cclass = jclass;
            do {
                try {
                    Method cmethod = cclass.getMethod(name, method.getParameterTypes());
                    ActionScript asa = cmethod.getAnnotation(ActionScript.class);
                    if (asa != null) {
                        if (asa.omit()) {
                            continue METHODS;
                        }
                        if (!StringUtil.isBlank(asa.name())) {
                            name = asa.name();
                        }
                    }
                } catch (NoSuchMethodException nsme) {
                    // thanks Java for insisting on using exceptions for a potentially expected
                    // code path; fall through and try the superclass
                }
                cclass = cclass.getSuperclass();
            } while (cclass != null);

            // if this is an auto-generated reader or writer method, skip it
            if (name.startsWith("readField_") || name.startsWith("writeField_")) {
                continue;
            }

            // see if we already have a member for this method name
            Member mem = getMember(list, name);
            String decl = createActionScriptDeclaration(name, method);
            if (mem == null) {
                mem = new Member(name, decl);
                mem.body = "    {\n        TODO: IMPLEMENT ME\n    }\n";
                list.add(mem);
            } else {
                // TODO: only overwrite if we have more arguments
                mem.definition = decl;
            }
        }

        // if we override hashCode() then add Hashable to our interfaces
        if (getMember(publicMethods, "hashCode") != null) {
            ifaces.add("Hashable");
        }

        // finally turn our implemented interfaces into an array
        implementedInterfaces = ifaces.toArray(new String[ifaces.size()]);
    }

    public void absorbJava (File jsource)
        throws IOException
    {
        // parse our Java source file for niggling bits
        BufferedReader bin = new BufferedReader(new FileReader(jsource));
        String line = null;
        Mode mode = Mode.PREAMBLE;
        Matcher m;
        int braceCount = 0;
        boolean seenOpenBrace = false;
        StringBuilder accum = new StringBuilder();
        while ((line = bin.readLine()) != null) {
            line = line.replaceAll("\\s+$", "");
            switch (mode) {
            case PREAMBLE:
                // look for the package declaration
                m = JPACKAGE.matcher(line);
                if (m.matches()) {
                    preamble = accum.toString();
                    accum.setLength(0);
                    packageName = m.group(1);
                    mode = Mode.IMPORTS;
                } else {
                    accum.append(line).append("\n");
                }
                break;

            case IMPORTS:
                // look for the start of the class comment
                if (line.startsWith("/**")) {
                    accum.setLength(0);
                    mode = Mode.CLASSCOMMENT;
                }
                m = IMPORT.matcher(line);
                if (m.matches()) {
                    imports.add(m.group(1));
                }
                break;

            case CLASSCOMMENT:
                // look for the class declaration
                if (line.startsWith("public ")) {
                    classComment = accum.toString();
                    accum.setLength(0);
                    mode = line.endsWith("{") ? Mode.CLASSBODY : Mode.CLASSDECL;
                } else {
                    accum.append(line).append("\n");
                }
                break;

            case CLASSDECL:
                // look for the open brace
                if (line.equals("{")) {
                    mode = Mode.CLASSBODY;
                }
                break;

            case CLASSBODY:
                // see if we match a field declaration
                if ((m = JFIELD.matcher(line)).matches()) {
                    // if this line does not end on a semicolon, keep reading until it does
                    if (line.indexOf(";") == -1) {
                        line = slurpUntil(bin, line, ";", true);
                        // now rematch it all on one line
                        m = JFIELD.matcher(line);
                        if (!m.matches()) {
                            System.err.println("J: Pants, no longer match field: " + line);
                            continue;
                        }
                    }

                    String name = m.group(1);
                    String comment = accum.toString();
                    accum.setLength(0);

                    // strip out any @ActionScript annotation
                    if (comment.indexOf("@ActionScript") != -1) {
                        StringBuilder combuf = new StringBuilder();
                        for (String cline : StringUtil.split(comment, "\n")) {
                            if (cline.indexOf("@ActionScript") == -1) {
                                if (combuf.length() > 0) {
                                    combuf.append("\n");
                                }
                                combuf.append(cline);
                            }
                        }
                        comment = combuf.toString();
                    }

                    // set the comment on the specified field
                    Member mem = updateComment(publicConstants, name, comment);
                    if (mem == null) {
                        mem = updateComment(publicFields, name, comment);
                    }
                    if (mem == null) {
                        mem = updateComment(protectedFields, name, comment);
                    }
                    if (mem == null) {
                        mem = updateComment(protectedConstants, name, comment);
                    }
                    if (mem == null) {
                        continue; // it was omitted, so skip it
                    }

                    // extract and clean up any default value
                    String defval = m.group(2).trim();
                    if (defval.startsWith("=")) {
                        defval = defval.substring(1);
                    }
                    if (defval.endsWith(";")) {
                        defval = defval.substring(0, defval.length()-1);
                    }
                    defval = defval.trim();
                    if (defval.length() > 0) {
                        mem.setInitialValue(defval);
                    }

                // see if we match a constructor declaration
                } else if ((m = JCONSTRUCTOR.matcher(line)).matches()) {
                    // if this line does not contain a close paren, keep reading until it does
                    if (line.indexOf(")") == -1) {
                        line = slurpUntil(bin, line, ")", true);
                        // now rematch it all on one line
                        m = JCONSTRUCTOR.matcher(line);
                        if (!m.matches()) {
                            System.err.println("J: Pants, no longer match ctor: " + line);
                            continue;
                        }
                    }

                    String name = m.group(1);
                    String comment = accum.toString();
                    accum.setLength(0);

                    // the only annotation that makes sense on a constructor is "omit"
                    if (comment.indexOf("@ActionScript") == -1) {
                        // set the comment on the specified method
                        updateComment(publicConstructors, name, comment);
                        updateComment(protectedConstructors, name, comment);
                    }

                    // switch to METHODBODY to absorb the method
                    braceCount = (line.indexOf("{") == -1) ? 0 : 1;
                    seenOpenBrace = (braceCount > 0);
                    mode = Mode.METHODBODY;

                // see if we match a method declaration
                } else if ((m = JMETHOD.matcher(line)).matches()) {
                    // if this line does not contain a close paren, keep reading until it does
                    if (line.indexOf(")") == -1) {
                        line = slurpUntil(bin, line, ")", true);
                        // now rematch it all on one line
                        m = JMETHOD.matcher(line);
                        if (!m.matches()) {
                            System.err.println(
                                "J: Pants, no longer match method: " + line);
                            continue;
                        }
                    }

                    String name = m.group(1);
                    String comment = accum.toString();
                    accum.setLength(0);

                    // look through the comment for an @ActionScript annotation; oh the hackery
                    if (comment.indexOf("@ActionScript") != -1) {
                        StringBuilder combuf = new StringBuilder();
                        for (String cline : StringUtil.split(comment, "\n")) {
                            if ((m = METHOD_ANNOTATION.matcher(cline)).matches()) {
                                name = m.group(1);
                            } else {
                                if (combuf.length() > 0) {
                                    combuf.append("\n");
                                }
                                combuf.append(cline);
                            }
                        }
                        comment = combuf.toString();
                    }

                    // set the comment on the specified method
                    updateComment(publicStaticMethods, name, comment);
                    updateComment(publicMethods, name, comment);
                    updateComment(protectedMethods, name, comment);
                    updateComment(protectedStaticMethods, name, comment);

                    // switch to METHODBODY to absorb the method
                    braceCount = (line.indexOf("{") == -1) ? 0 : 1;
                    seenOpenBrace = (braceCount > 0);
                    mode = Mode.METHODBODY;

                } else {
                    // make sure this is a comment (or annotation)
                    String tline = line.trim();
                    if (tline.length() == 0 || tline.startsWith("@") ||
                        tline.startsWith("//") || tline.startsWith("/*") ||
                        tline.startsWith("*")) {
                        accum.append(line).append("\n");

                    } else if (line.startsWith("}")) {
                        mode = Mode.POSTCLASS;

                    } else {
                        System.err.println("J: Non-comment encountered between members: " + line);
                    }
                }
                break;

            case METHODBODY:
                if (line.indexOf("{") != -1) {
                    seenOpenBrace = true;
                    braceCount++;
                }
                if (line.indexOf("}") != -1) {
                    braceCount--;
                }
                if (seenOpenBrace && braceCount == 0) {
                    mode = Mode.CLASSBODY;
                }
                break;

            case POSTCLASS:
                System.err.println("J: Post-class junk: " + line);
                break;

            case POSTPKG:
                System.err.println("J: Post-pkg junk: " + line);
                break;
            }
        }
        bin.close();

        if (accum.length() > 0) {
            System.err.println("J: Leftover accumulated text: " + accum);
        }
    }

    public void absorbActionScript (File assource)
        throws IOException
    {
        // if our action script source file doesn't exist, we're done
        if (!assource.exists()) {
            return;
        }

        BufferedReader bin = new BufferedReader(new FileReader(assource));
        String line = null;
        Mode mode = Mode.PREAMBLE;
        Matcher m;
        int braceCount = 0;
        boolean seenOpenBrace = false;
        StringBuilder accum = new StringBuilder();
        Member curmem = null;
        while ((line = bin.readLine()) != null) {
            line = line.replaceAll("\\s+$", "");
            // System.err.println("  " + mode + " : " + line);
            switch (mode) {
            case PREAMBLE:
                // look for the package declaration
                if (line.startsWith("package ")) {
                    preamble = accum.toString();
                    accum.setLength(0);
                    mode = Mode.IMPORTS;
                } else {
                    accum.append(line).append("\n");
                }
                break;

            case IMPORTS:
                // look for the start of the class comment
                if (line.startsWith("/**")) {
                    accum.setLength(0);
                    mode = Mode.CLASSCOMMENT;
                } else if (line.startsWith("public ")) {
                    accum.setLength(0);
                    mode = line.endsWith("{") ? Mode.CLASSBODY : Mode.CLASSDECL;
                }
                m = IMPORT.matcher(line);
                if (m.matches()) {
                    imports.add(m.group(1));
                }
                break;

            case CLASSCOMMENT:
                // look for the class declaration
                if (line.startsWith("public ")) {
                    classComment = accum.toString();
                    accum.setLength(0);
                    mode = line.endsWith("{") ? Mode.CLASSBODY : Mode.CLASSDECL;
                } else {
                    accum.append(line).append("\n");
                }
                break;

            case CLASSDECL:
                // look for the open brace
                if (line.equals("{")) {
                    mode = Mode.CLASSBODY;
                }
                break;

            case CLASSBODY:
                // see if we match a field declaration
                if ((m = ASFIELD.matcher(line)).matches()) {
                    // if this line does not contain a semicolon, keep reading until it does
                    if (line.indexOf(";") == -1) {
                        line = slurpUntil(bin, line, ";", false);
                    }

                    ArrayList<Member> list = publicFields;
                    boolean isProtected = (line.indexOf("protected ") != -1);
                    boolean isConst = (line.indexOf("const ") != -1);
                    list = isProtected ?
                        (isConst ? protectedConstants : protectedFields) :
                        (isConst ? publicConstants : publicFields);

                    // extract the name, replace the declaration
                    String fieldName = m.group(1);
                    //log.info("ASFIELD", "name", fieldName);
                    Member member = getMember(list, fieldName);
                    if (member == null) {
                        System.err.println(
                            "Have ActionScript field with no " +
                            "Java equivalent: " + fieldName);
                        member = new Member(fieldName, line.trim());
                        list.add(member);
                    }

                    // TODO: update the comment?
                    accum.setLength(0);

                // see if we match a constructor declaration
                } else if (line.indexOf("public function " + className) != -1) {
                    // if this line does not contain a close paren, keep reading until it does
                    if (line.indexOf(")") == -1) {
                        line = slurpUntil(bin, line, ")", false);
                    }

                    // look up the public constructor
                    curmem = getMember(publicConstructors, className);
                    if (curmem == null) {
                        System.err.println("Missing public constructor for " +
                                           "update " + className + "().");
                    } else {
                        // update the definition and comment with the
                        // ActionScript versions
                        curmem.definition = line.trim();
                        curmem.setComment(accum.toString());
                    }
                    accum.setLength(0);

                    // switch to METHODBODY to absorb the method
                    braceCount = (line.indexOf("{") == -1) ? 0 : 1;
                    seenOpenBrace = (braceCount > 0);
                    mode = Mode.METHODBODY;

                // see if we match a method declaration
                } else if ((m = ASFUNCTION.matcher(line)).matches()) {
                    // if this line does not contain a close paren, keep reading until it does
                    if (line.indexOf(")") == -1) {
                        line = slurpUntil(bin, line, ")", false);
                    }

                    ArrayList<Member> list = publicMethods;
                    boolean isProtected = (line.indexOf("protected ") != -1);
                    boolean isStatic = (line.indexOf("static ") != -1);
                    list = isProtected ?
                        (isStatic ? protectedStaticMethods : protectedMethods) :
                        (isStatic ? publicStaticMethods : publicMethods);

                    // extract the name, replace the declaration
                    String funcName = m.group(1);
                    curmem = getMember(list, funcName);
                    if (curmem == null) {
                        System.err.println(
                            "Have ActionScript method with no " +
                            "Java equivalent: " + funcName + "().");
                        curmem = new Member(funcName, "");
                        list.add(curmem);
                    }

                    // update the definition and comment with the ActionScript
                    // versions
                    curmem.definition = line.trim();
                    String ncomment = accum.toString();
                    if (!StringUtil.isBlank(ncomment)) {
                        curmem.setComment(ncomment);
                    }
                    accum.setLength(0);

                    // switch to METHODBODY to absorb the method
                    braceCount = (line.indexOf("{") == -1) ? 0 : 1;
                    seenOpenBrace = (braceCount > 0);
                    mode = Mode.METHODBODY;

                } else {
                    // make sure this is a comment (or annotation)
                    String tline = line.trim();
                    if (tline.length() == 0 || tline.startsWith("@") ||
                        tline.startsWith("//") || tline.startsWith("/*") ||
                        tline.startsWith("*")) {
                        accum.append(line).append("\n");

                    } else if (tline.equals("}")) {
                        mode = Mode.POSTCLASS;

                    } else {
                        System.err.println("AS: Non-comment encountered between members: " + line);
                    }
                }
                break;

            case METHODBODY:
                if (line.indexOf("{") != -1) {
                    seenOpenBrace = true;
                    braceCount++;
                }
                if (line.indexOf("}") != -1) {
                    braceCount--;
                }
                accum.append(line).append("\n");
                if (seenOpenBrace && braceCount == 0) {
                    // update the method body of our currently matched member
                    if (curmem != null) {
                        // don't overwrite the auto-generated methods
                        if (!curmem.noreplace) {
                            curmem.body = accum.toString();
                        }
                        curmem = null;
                    } else {
                        System.err.println(
                            "AS: No matched method for body:\n" + accum);
                    }
                    accum.setLength(0);
                    mode = Mode.CLASSBODY;
                }
                break;

            case POSTCLASS:
                if (line.trim().equals("}")) {
                    mode = Mode.POSTPKG;
                } else {
                    System.err.println("AS: Post-class junk: " + line);
                }
                break;

            case POSTPKG:
                System.err.println("AS: Post-package junk: " + line);
                break;
            }
        }
        bin.close();

        if (accum.length() > 0) {
            System.err.println("AS: Leftover accumulated text: " + accum);
        }
    }

    public Member updateComment (
        ArrayList<Member> list, String name, String comment)
    {
        Member mem = getMember(list, name);
        if (mem != null) {
            mem.setComment(comment);
        }
        return mem;
    }

    public Member getMember (ArrayList<Member> list, String name)
    {
        for (Member member : list) {
            if (member.name.equals(name)) {
                return member;
            }
        }
        return null;
    }

    /**
     * Writes our class definition to the supplied writer.
     */
    public void write (PrintWriter writer)
    {
        writer.print(preamble);
        writer.println("package " + packageName + " {");
        if (!imports.isEmpty()) {
            writer.println();
            for (String imp : imports) {
                writer.println("import " + imp + ";");
            }
            writer.println();
        }

        writer.print(classComment);
        writer.print("public ");
        if (isAbstract) {
            writer.print("/*abstract*/ ");
        }
        writer.print("class " + className);
        if (superClassName != null) {
            writer.print(" extends " + superClassName);
        }
        writer.println("");

        if (implementedInterfaces.length > 0) {
            writer.print("    implements ");
            for (int ii = 0; ii < implementedInterfaces.length; ii++) {
                if (ii > 0) {
                    writer.print(", ");
                }
                writer.print(implementedInterfaces[ii]);
            }
            writer.println("");
        }

        writer.println("{"); // start class block

        for (Member member : publicConstants) {
            member.write(writer);
        }
        writeBlank(publicConstants, writer);

        for (Member member : publicFields) {
            member.write(writer);
        }
        writeBlank(publicFields, writer);

        for (Member member : publicStaticMethods) {
            member.write(writer);
            writeBlank(publicStaticMethods, writer);
        }

        for (Member member : publicConstructors) {
            member.write(writer);
            writer.println();
        }

        for (Member member : publicMethods) {
            member.write(writer);
            writer.println();
        }

        for (Member member : protectedConstructors) {
            member.write(writer);
            writer.println();
        }

        for (Member member : protectedMethods) {
            member.write(writer);
            writer.println();
        }

        for (Member member : protectedStaticMethods) {
            member.write(writer);
            writer.println();
        }

        for (Member member : protectedFields) {
            member.write(writer);
        }
        writeBlank(protectedFields, writer);

        for (Member member : protectedConstants) {
            member.write(writer);
        }

        writer.println("}"); // end class block
        writer.println("}"); // end package block
        writer.flush();
    }

    @Override
    public String toString ()
    {
        StringBuilder builder = new StringBuilder();
        builder.append("public ");
        if (isAbstract) {
            builder.append("abstract ");
        }
        builder.append("class ").append(className);
        if (superClassName != null) {
            builder.append(" extends ").append(superClassName);
        }
        return builder.toString();
    }

    protected String slurpUntil (BufferedReader reader, String text, String token, boolean stripNL)
        throws IOException
    {
        int braces = countChars(text, '{') - countChars(text, '}');
        String line;
        while ((line = reader.readLine()) != null) {
            braces += countChars(line, '{');
            braces -= countChars(line, '}');
            if (braces < 0) {
                System.err.println(
                    "Too many close braces? [text=" + text + ", line=" + line + "].");
            }
            line = line.replaceAll("\\s+$", "");
            if (!stripNL) {
                text += "\n";
            }
            text += line;
            if (braces <= 0 && line.indexOf(token) != -1) {
                break;
            }
        }
        return text;
    }

    protected int countChars (String text, char target)
    {
        int idx = -1, count = 0;
        while ((idx = text.indexOf(target, idx+1)) != -1) {
            count++;
        }
        return count;
    }

    protected void writeBlank (Collection<?> justWritten, PrintWriter writer)
    {
        if (!justWritten.isEmpty()) {
            writer.println();
        }
    }

    /** Denotes various phases of class file parsing. */
    protected static enum Mode { PREAMBLE, IMPORTS, CLASSCOMMENT, CLASSDECL,
                                 CLASSBODY, METHODBODY, POSTCLASS, POSTPKG }

    protected static Pattern JPACKAGE = Pattern.compile("package\\s+(\\S+);");

    protected static Pattern JFIELD = Pattern.compile(
        "\\s+(?:public|protected|private)" +
        "(?:\\s+static|\\s+final|\\s+transient)*" +
        "\\s+(?:[a-zA-Z\\[\\]<\\?>,]+)" + // type
        "\\s+([_a-zA-Z]\\w*)(\\s+=.*|;)");

    protected static Pattern JCONSTRUCTOR = Pattern.compile(
        "\\s+(?:public|protected|private)\\s+([a-zA-Z]\\w*) \\(.*");

    protected static Pattern JMETHOD = Pattern.compile(
        "\\s+(?:public|protected|private).* ([a-zA-Z]\\w*) \\(.*");

    protected static Pattern METHOD_ANNOTATION = Pattern.compile(
        ".*@ActionScript\\(name=\"(\\w+)\"\\).*");

    protected static Pattern ASFIELD = Pattern.compile(
        "\\s+(?:public|protected|private)" +
        "(?:\\s+static)?(?:\\s+var|\\s+const)?" +
        "\\s+([_a-zA-Z]\\w*)" + // variable name
        "\\s+(?::[a-zA-Z\\[\\]<>,]+)" + // type
        "(\\s+=.*|;)");

    protected static Pattern ASFUNCTION = Pattern.compile(
        ".*(?:public|protected)" +
        "(?:\\s+static)?" +
        "(?:\\s+/\\*\\s*abstract\\s*\\*/)?" +
        "\\s+function\\s+((?:get\\s+|set\\s+)?[a-zA-Z]\\w*) \\(.*");

    protected static Pattern ARRAYINIT = Pattern.compile("new (\\w+)\\[0\\]");

    protected static Pattern IMPORT = Pattern.compile("import (.*);");
}