// Copyright (c) 2010-2014 SharpDX - Alexandre Mutel
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System;
using System.Runtime.InteropServices;

namespace SharpGen.Runtime
{
    /// <summary>
    ///     A boolean value stored on 4 bytes (instead of 1 in .NET).
    /// </summary>
    [StructLayout(LayoutKind.Sequential, Size = 4)]
    public readonly struct RawBool : IEquatable<RawBool>
    {
        private readonly int boolValue;

        public RawBool(bool boolValue) => this.boolValue = boolValue ? 1 : 0;
        public RawBool(int boolValue) => this.boolValue = boolValue;
        public RawBool(uint boolValue) => this.boolValue = (int) boolValue;

        public override bool Equals(object obj) => obj switch
        {
            null => false,
            bool b => Equals(new RawBool(b)),
            RawBool rawBool => Equals(rawBool),
            int b => Equals(new RawBool(b)),
            uint b => Equals(new RawBool(b)),
            byte b => Equals(new RawBool(b)),
            sbyte b => Equals(new RawBool(b)),
            short b => Equals(new RawBool(b)),
            ushort b => Equals(new RawBool(b)),
            long b => Equals(new RawBool((int) b)),
            ulong b => Equals(new RawBool((uint) b)),
            _ => false
        };

        public bool Equals(RawBool other) => (boolValue != 0) == (other.boolValue != 0);
        public override int GetHashCode() => boolValue;
        public static bool operator ==(RawBool left, RawBool right) => left.Equals(right);
        public static bool operator !=(RawBool left, RawBool right) => !left.Equals(right);
        public static implicit operator bool(RawBool booleanValue) => booleanValue.boolValue != 0;
        public static implicit operator RawBool(bool boolValue) => new(boolValue);
        public static explicit operator int(RawBool booleanValue) => booleanValue.boolValue;
        public static explicit operator RawBool(int boolValue) => new(boolValue);
        public static explicit operator uint(RawBool booleanValue) => (uint) booleanValue.boolValue;
        public static explicit operator RawBool(uint boolValue) => new(boolValue);
        public override string ToString() => (boolValue != 0).ToString();
    }
}