/*
 *  This file is part of the KDE libraries
 *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
 *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
 *  Copyright (C) 2003 Apple Computer, Inc.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 *
 */

#include "value.h"
#include "object.h"
#include "types.h"
#include "interpreter.h"

#include <assert.h>
#include <math.h>
#include <stdio.h>

#include "internal.h"
#include "collector.h"
#include "operations.h"
#include "error_object.h"
#include "debugger.h"
#include "nodes.h"
#include "context.h"

using namespace KJS;

// ------------------------------ Context --------------------------------------

const ScopeChain &Context::scopeChain() const
{
  return rep->scopeChain();
}

Object Context::variableObject() const
{
  return rep->variableObject();
}

Object Context::thisValue() const
{
  return rep->thisValue();
}

const Context Context::callingContext() const
{
  return rep->callingContext();
}

CodeType Context::codeType() const
{
  return rep->codeType();
}

int Context::sourceId() const
{
  return rep->sourceId;
}

int Context::curStmtFirstLine() const
{
  return rep->line0;
}

int Context::curStmtLastLine() const
{
  return rep->line1;
}

Object Context::function() const
{
  return Object(rep->function());
}

Identifier Context::functionName() const
{
  return rep->functionName;
}

List Context::args() const
{
  return rep->args;
}

bool KJS::operator==(const Context &c1, const Context &c2)
{
  return (c1.imp() == c2.imp());
}

bool KJS::operator!=(const Context &c1, const Context &c2)
{
  return (c1.imp() != c2.imp());
}

// ------------------------------ Interpreter ---------------------------------

Interpreter::Interpreter(const Object &global)
{
  rep = new InterpreterImp(this,global);
}

Interpreter::Interpreter()
{
  Object global(new ObjectImp());
  rep = new InterpreterImp(this,global);
}

Interpreter::~Interpreter()
{
  delete rep;
}

Object &Interpreter::globalObject() const
{
  return rep->globalObject();
}

void Interpreter::initGlobalObject()
{
  rep->initGlobalObject();
}

void Interpreter::lock()
{
  InterpreterImp::lock();
}

void Interpreter::unlock()
{
  InterpreterImp::unlock();
}

ExecState *Interpreter::globalExec()
{
  return rep->globalExec();
}

bool Interpreter::checkSyntax(const UString &code, int *errLine, UString *errMsg)
{
  return rep->checkSyntax(code,errLine,errMsg);
}

bool Interpreter::checkSyntax(const UString &code)
{
  return rep->checkSyntax(code);
}

Completion Interpreter::evaluate(const UString &code, const Value &thisV)
{
  return rep->evaluate(code,thisV);
}

InterpreterImp *Interpreter::imp()
{
  return rep;
}

Object Interpreter::builtinObject() const
{
  return rep->builtinObject();
}

Object Interpreter::builtinFunction() const
{
  return rep->builtinFunction();
}

Object Interpreter::builtinArray() const
{
  return rep->builtinArray();
}

Object Interpreter::builtinBoolean() const
{
  return rep->builtinBoolean();
}

Object Interpreter::builtinString() const
{
  return rep->builtinString();
}

Object Interpreter::builtinNumber() const
{
  return rep->builtinNumber();
}

Object Interpreter::builtinDate() const
{
  return rep->builtinDate();
}

Object Interpreter::builtinRegExp() const
{
  return rep->builtinRegExp();
}

Object Interpreter::builtinError() const
{
  return rep->builtinError();
}

Object Interpreter::builtinObjectPrototype() const
{
  return rep->builtinObjectPrototype();
}

Object Interpreter::builtinFunctionPrototype() const
{
  return rep->builtinFunctionPrototype();
}

Object Interpreter::builtinArrayPrototype() const
{
  return rep->builtinArrayPrototype();
}

Object Interpreter::builtinBooleanPrototype() const
{
  return rep->builtinBooleanPrototype();
}

Object Interpreter::builtinStringPrototype() const
{
  return rep->builtinStringPrototype();
}

Object Interpreter::builtinNumberPrototype() const
{
  return rep->builtinNumberPrototype();
}

Object Interpreter::builtinDatePrototype() const
{
  return rep->builtinDatePrototype();
}

Object Interpreter::builtinRegExpPrototype() const
{
  return rep->builtinRegExpPrototype();
}

Object Interpreter::builtinErrorPrototype() const
{
  return rep->builtinErrorPrototype();
}

Object Interpreter::builtinEvalError() const
{
  return rep->builtinEvalError();
}

Object Interpreter::builtinRangeError() const
{
  return rep->builtinRangeError();
}

Object Interpreter::builtinReferenceError() const
{
  return rep->builtinReferenceError();
}

Object Interpreter::builtinSyntaxError() const
{
  return rep->builtinSyntaxError();
}

Object Interpreter::builtinTypeError() const
{
  return rep->builtinTypeError();
}

Object Interpreter::builtinURIError() const
{
  return rep->builtinURIError();
}

Object Interpreter::builtinEvalErrorPrototype() const
{
  return rep->builtinEvalErrorPrototype();
}

Object Interpreter::builtinRangeErrorPrototype() const
{
  return rep->builtinRangeErrorPrototype();
}

Object Interpreter::builtinReferenceErrorPrototype() const
{
  return rep->builtinReferenceErrorPrototype();
}

Object Interpreter::builtinSyntaxErrorPrototype() const
{
  return rep->builtinSyntaxErrorPrototype();
}

Object Interpreter::builtinTypeErrorPrototype() const
{
  return rep->builtinTypeErrorPrototype();
}

Object Interpreter::builtinURIErrorPrototype() const
{
  return rep->builtinURIErrorPrototype();
}

void Interpreter::setCompatMode(CompatMode mode)
{
  rep->setCompatMode(mode);
}

Interpreter::CompatMode Interpreter::compatMode() const
{
  return rep->compatMode();
}

bool Interpreter::collect()
{
  return Collector::collect();
}

#ifdef KJS_DEBUG_MEM
#include "lexer.h"
void Interpreter::finalCheck()
{
  fprintf(stderr,"Interpreter::finalCheck()\n");
  // Garbage collect - as many times as necessary
  // (we could delete an object which was holding another object, so
  // the deref() will happen too late for deleting the impl of the 2nd object).
  while( Collector::collect() )
    ;

  Node::finalCheck();
  Collector::finalCheck();
  Lexer::globalClear();
  UString::globalClear();
}
#endif

// ------------------------------ ExecState --------------------------------------

void ExecState::setException(const Value &e)
{
  if (e.isValid()) {
    Debugger *dbg = _interpreter->imp()->debugger();
    if (dbg)
      dbg->exception(this,e,_context->inTryCatch());
  }
  _exception = e;
}

void ExecState::clearException()
{
  terminate_request = false;
  _exception = Value();
}

bool ExecState::terminate_request = false;

static bool defaultConfirm() { return true; }

bool (*ExecState::confirmTerminate)() = defaultConfirm;

bool ExecState::hadException()
{
  if (terminate_request) {
    terminate_request = false;
    if (confirmTerminate())
      _exception = Error::create((ExecState*)this);
  }
  return _exception.isValid();
}

void Interpreter::virtual_hook( int, void* )
{ /*BASE::virtual_hook( id, data );*/ }


Interpreter *ExecState::lexicalInterpreter() const
{
  // TODO: use proper implementation
#if 1
  return dynamicInterpreter();
#else
  if (!_context) {
    return dynamicInterpreter();
  }

  InterpreterImp *result = InterpreterImp::interpreterWithGlobalObject(_context->scopeChain().bottom());

  if (!result) {
    return dynamicInterpreter();
  }

  return result->interpreter();
#endif
}