using System;
using System.Diagnostics;
using System.Runtime.Remoting;
using System.Security.Permissions;
using System.Text;
using AspClassic.Scripting.Utils;

namespace AspClassic.Scripting.Hosting;

[DebuggerDisplay("{Path ?? \"<anonymous>\"}")]
public sealed class ScriptSource : MarshalByRefObject
{
	private readonly ScriptEngine _engine;

	private readonly SourceUnit _unit;

	internal SourceUnit SourceUnit => _unit;

	public string Path => _unit.Path;

	public SourceCodeKind Kind => _unit.Kind;

	public ScriptEngine Engine => _engine;

	internal ScriptSource(ScriptEngine engine, SourceUnit sourceUnit)
	{
		_unit = sourceUnit;
		_engine = engine;
	}

	public CompiledCode Compile()
	{
		return CompileInternal(null, null);
	}

	public CompiledCode Compile(ErrorListener errorListener)
	{
		ContractUtils.RequiresNotNull(errorListener, "errorListener");
		return CompileInternal(null, errorListener);
	}

	public CompiledCode Compile(CompilerOptions compilerOptions)
	{
		ContractUtils.RequiresNotNull(compilerOptions, "compilerOptions");
		return CompileInternal(compilerOptions, null);
	}

	public CompiledCode Compile(CompilerOptions compilerOptions, ErrorListener errorListener)
	{
		ContractUtils.RequiresNotNull(errorListener, "errorListener");
		ContractUtils.RequiresNotNull(compilerOptions, "compilerOptions");
		return CompileInternal(compilerOptions, errorListener);
	}

	private CompiledCode CompileInternal(CompilerOptions compilerOptions, ErrorListener errorListener)
	{
		ErrorSink errorSink = new ErrorListenerProxySink(this, errorListener);
		ScriptCode scriptCode = ((compilerOptions != null) ? _unit.Compile(compilerOptions, errorSink) : _unit.Compile(errorSink));
		if (scriptCode == null)
		{
			return null;
		}
		return new CompiledCode(_engine, scriptCode);
	}

	public dynamic Execute(ScriptScope scope)
	{
		ContractUtils.RequiresNotNull(scope, "scope");
		return _unit.Execute(scope.Scope);
	}

	public dynamic Execute()
	{
		return _unit.Execute();
	}

	public T Execute<T>(ScriptScope scope)
	{
		return _engine.Operations.ConvertTo<T>((object)Execute(scope));
	}

	public T Execute<T>()
	{
		return _engine.Operations.ConvertTo<T>((object)Execute());
	}

	public ObjectHandle ExecuteAndWrap(ScriptScope scope)
	{
		return new ObjectHandle((object)Execute(scope));
	}

	public ObjectHandle ExecuteAndWrap()
	{
		return new ObjectHandle((object)Execute());
	}

	public int ExecuteProgram()
	{
		return _unit.LanguageContext.ExecuteProgram(_unit);
	}

	public ScriptCodeParseResult GetCodeProperties()
	{
		return _unit.GetCodeProperties();
	}

	public ScriptCodeParseResult GetCodeProperties(CompilerOptions options)
	{
		return _unit.GetCodeProperties(options);
	}

	public SourceCodeReader GetReader()
	{
		return _unit.GetReader();
	}

	public Encoding DetectEncoding()
	{
		using SourceCodeReader sourceCodeReader = _unit.GetReader();
		return sourceCodeReader.Encoding;
	}

	public string[] GetCodeLines(int start, int count)
	{
		return _unit.GetCodeLines(start, count);
	}

	public string GetCodeLine(int line)
	{
		return _unit.GetCodeLine(line);
	}

	public string GetCode()
	{
		return _unit.GetCode();
	}

	public int MapLine(int line)
	{
		return _unit.MapLine(line);
	}

	public SourceSpan MapLine(SourceSpan span)
	{
		return new SourceSpan(_unit.MakeLocation(span.Start), _unit.MakeLocation(span.End));
	}

	public SourceLocation MapLine(SourceLocation location)
	{
		return _unit.MakeLocation(location);
	}

	public string MapLinetoFile(int line)
	{
		return _unit.Path;
	}

	[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.Infrastructure)]
	public override object InitializeLifetimeService()
	{
		return null;
	}
}