using System;

using System.Reflection;

namespace CodeMap.ReferenceData

{

/// <summary>Represents a reference to a field.</summary>

public class FieldReference : MemberReference, IEquatable<FieldInfo>

{

internal FieldReference()

{

}

/// <summary>The field name.</summary>

public string Name { get; internal set; }

/// <summary>The field declaring type.</summary>

public TypeReference DeclaringType { get; internal set; }

/// <summary>The declaring assembly.</summary>

public override AssemblyReference Assembly

=> DeclaringType.Assembly;

/// <summary>Accepts the provided <paramref name="visitor"/> for selecting a concrete instance method.</summary>

/// <param name="visitor">The <see cref="MemberReferenceVisitor"/> interpreting the reference data.</param>

/// <exception cref="NullReferenceException">Thrown when <paramref name="visitor"/> is <c>null</c>.</exception>

public override void Accept(MemberReferenceVisitor visitor)

=> visitor.VisitField(this);

/// <summary>Determines whether the current <see cref="FieldReference"/> is equal to the provided <paramref name="memberInfo"/>.</summary>

/// <param name="memberInfo">The <see cref="MemberInfo"/> to compare to.</param>

/// <returns>Returns <c>true</c> if the current <see cref="FieldReference"/> references the provided <paramref name="memberInfo"/>; <c>false</c> otherwise.</returns>

public override bool Equals(MemberInfo memberInfo)

=> Equals(memberInfo as FieldInfo);

/// <summary>Determines whether the current <see cref="FieldReference"/> is equal to the provided <paramref name="fieldInfo"/>.</summary>

/// <param name="fieldInfo">The <see cref="FieldInfo"/> to compare to.</param>

/// <returns>Returns <c>true</c> if the current <see cref="FieldReference"/> references the provided <paramref name="fieldInfo"/>; <c>false</c> otherwise.</returns>

public bool Equals(FieldInfo fieldInfo)

=> fieldInfo is object

&& Name.Equals(fieldInfo.Name, StringComparison.OrdinalIgnoreCase)

&& DeclaringType.Equals(fieldInfo.DeclaringType);

/// <summary>Determines whether the current <see cref="FieldReference"/> is equal to the provided <paramref name="assemblyName"/>.</summary>

/// <param name="assemblyName">The <see cref="AssemblyName"/> to compare to.</param>

/// <returns>Returns <c>true</c> if the current <see cref="FieldReference"/> references the provided <paramref name="assemblyName"/>; <c>false</c> otherwise.</returns>

/// <remarks>This method always returns <c>false</c> because an <see cref="AssemblyName"/> cannot represent a field reference.</remarks>

public sealed override bool Equals(AssemblyName assemblyName)

=> false;

}

}