using Qrakhen.Qamp.Core.Values;
using System.Runtime.CompilerServices;

using V = Qrakhen.Qamp.Core.Values.ValueType;

namespace Qrakhen.Qamp.Core;

public static class Assert
{
   public static void IsPrimitive(params Value[] values)
   {
      AssertAndThrow(() => values.All(value => value.Is(V.Primitive, false)), values);
   }

   public static void NotZero(params Value[] values)
   {
      AssertAndThrow(() => values.All(value => value.Signed != 0), values);
   }

   public static void IsInteger(params Value[] values)
   {
      AssertAndThrow(() => values.All(value => value.Is(V.Integer, false)), values);
   }

   public static void NotVoid(params Value[] values)
   {
      AssertAndThrow(() => values.All(value => value.Type != V.Void), values);
   }

   private static void AssertAndThrow(Func<bool> assertion, object? parameter, [CallerMemberName] string? method = "") =>
       AssertAndThrow(assertion, [parameter], method);

   private static void AssertAndThrow(
       Func<bool> assertion,
       object?[] parameters,
       [CallerMemberName] string? method = "")
   {
      if (!assertion.Invoke())
         throw new AssertionException(method ?? "", parameters);
   }

   public class AssertionException : Exception
   {
      public readonly string Assertion;
      public readonly object?[] Parameters;

      public AssertionException(string assertion, params object?[] parameters)
          : base($"Assertion {assertion} failed for parameters:{Environment.NewLine}" +
                 $"{string.Join(Environment.NewLine, parameters.Select(p => $" - <{p?.GetType().Name ?? "null"}>{p?.ToString() ?? "null"}"))}")
      {
         Assertion = assertion;
         Parameters = parameters;
      }
   }
}