using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using Microsoft.CodeAnalysis.PooledObjects;

namespace Microsoft.CodeAnalysis.CSharp.Symbols;

internal sealed class SynthesizedEmbeddedNativeIntegerAttributeSymbol : SynthesizedEmbeddedAttributeSymbolBase
{
	private readonly ImmutableArray<FieldSymbol> _fields;

	private readonly ImmutableArray<MethodSymbol> _constructors;

	private readonly TypeSymbol _boolType;

	private const string FieldName = "TransformFlags";

	public override ImmutableArray<MethodSymbol> Constructors => _constructors;

	public SynthesizedEmbeddedNativeIntegerAttributeSymbol(string name, NamespaceSymbol containingNamespace, ModuleSymbol containingModule, NamedTypeSymbol systemAttributeType, TypeSymbol boolType)
		: base(name, containingNamespace, containingModule, systemAttributeType)
	{
		_boolType = boolType;
		TypeWithAnnotations boolArrayType = TypeWithAnnotations.Create(ArrayTypeSymbol.CreateSZArray(boolType.ContainingAssembly, TypeWithAnnotations.Create(boolType)));
		_fields = ImmutableArray.Create((FieldSymbol)new SynthesizedFieldSymbol(this, boolArrayType.Type, "TransformFlags", isPublic: true, isReadOnly: true));
		_constructors = ImmutableArray.Create((MethodSymbol)new SynthesizedEmbeddedAttributeConstructorWithBodySymbol(this, (MethodSymbol m) => ImmutableArray<ParameterSymbol>.Empty, delegate(SyntheticBoundNodeFactory f, ArrayBuilder<BoundStatement> s, ImmutableArray<ParameterSymbol> p)
		{
			GenerateParameterlessConstructorBody(f, s);
		}), (MethodSymbol)new SynthesizedEmbeddedAttributeConstructorWithBodySymbol(this, (MethodSymbol m) => ImmutableArray.Create(SynthesizedParameterSymbol.Create(m, boolArrayType, 0, (RefKind)0, "", (ScopedKind)0)), delegate(SyntheticBoundNodeFactory f, ArrayBuilder<BoundStatement> s, ImmutableArray<ParameterSymbol> p)
		{
			GenerateBoolArrayConstructorBody(f, s, p);
		}));
	}

	internal override IEnumerable<FieldSymbol> GetFieldsToEmit()
	{
		return _fields;
	}

	internal override AttributeUsageInfo GetAttributeUsageInfo()
	{
		//IL_0007: Unknown result type (might be due to invalid IL or missing references)
		return new AttributeUsageInfo(AttributeTargets.Class | AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Event | AttributeTargets.Parameter | AttributeTargets.ReturnValue | AttributeTargets.GenericParameter, false, false);
	}

	private void GenerateParameterlessConstructorBody(SyntheticBoundNodeFactory factory, ArrayBuilder<BoundStatement> statements)
	{
		statements.Add((BoundStatement)factory.ExpressionStatement(factory.AssignmentExpression(factory.Field(factory.This(), _fields.Single()), factory.Array(_boolType, ImmutableArray.Create((BoundExpression)factory.Literal(value: true))))));
	}

	private void GenerateBoolArrayConstructorBody(SyntheticBoundNodeFactory factory, ArrayBuilder<BoundStatement> statements, ImmutableArray<ParameterSymbol> parameters)
	{
		statements.Add((BoundStatement)factory.ExpressionStatement(factory.AssignmentExpression(factory.Field(factory.This(), _fields.Single()), factory.Parameter(parameters.Single()))));
	}
}