// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : Partition.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Aaru common types.
//
// --[ Description ] ----------------------------------------------------------
//
//     Contains common partition types.
//
// --[ License ] --------------------------------------------------------------
//
//     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.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2023 Natalia Portillo
// ****************************************************************************/

using System;

#pragma warning disable CS1591
namespace Aaru.CommonTypes;

/// <inheritdoc cref="System.IComparable&lt;Partition&gt;" />
/// <summary>Partition structure.</summary>
public struct Partition : IEquatable<Partition>, IComparable<Partition>
{
    /// <summary>Partition number, 0-started</summary>
    public ulong Sequence;
    /// <summary>Partition type</summary>
    public string Type;
    /// <summary>Partition name (if the scheme supports it)</summary>
    public string Name;
    /// <summary>Start of the partition, in bytes</summary>
    public ulong Offset;
    /// <summary>LBA of partition start</summary>
    public ulong Start;
    /// <summary>Length in bytes of the partition</summary>
    public ulong Size;
    /// <summary>Length in sectors of the partition</summary>
    public ulong Length;
    /// <summary>Information that does not find space in this struct</summary>
    public string Description;

    /// <summary>LBA of last partition sector</summary>
    public readonly ulong End => Start + Length - 1;

    /// <summary>Name of partition scheme that contains this partition</summary>
    public string Scheme;

    /// <inheritdoc />
    /// <summary>Compares two partitions</summary>
    /// <param name="other">Partition to compare with</param>
    /// <returns>0 if both partitions start and end at the same sector</returns>
    public bool Equals(Partition other) => Start == other.Start && Length == other.Length;

    /// <inheritdoc />
    public override bool Equals(object obj) => obj is Partition partition && Equals(partition);

    /// <inheritdoc />

    // ReSharper disable once NonReadonlyMemberInGetHashCode
    public readonly override int GetHashCode() => Start.GetHashCode() + End.GetHashCode();

    /// <summary>
    ///     Compares this partition with another and returns an integer that indicates whether the current partition
    ///     precedes, follows, or is in the same place as the other partition.
    /// </summary>
    /// <param name="other">Partition to compare with</param>
    /// <returns>A value that indicates the relative equality of the partitions being compared.</returns>
    /// <inheritdoc />
    public int CompareTo(Partition other)
    {
        if(Start == other.Start && End == other.End)
            return 0;

        if(Start > other.Start || End > other.End)
            return 1;

        return -1;
    }

    // Define the equality operator.
    public static bool operator ==(Partition operand1, Partition operand2) => operand1.Equals(operand2);

    // Define the inequality operator.
    public static bool operator !=(Partition operand1, Partition operand2) => !operand1.Equals(operand2);

    // Define the is greater than operator.
    public static bool operator >(Partition operand1, Partition operand2) => operand1.CompareTo(operand2) == 1;

    // Define the is less than operator.
    public static bool operator <(Partition operand1, Partition operand2) => operand1.CompareTo(operand2) == -1;

    // Define the is greater than or equal to operator.
    public static bool operator >=(Partition operand1, Partition operand2) => operand1.CompareTo(operand2) >= 0;

    // Define the is less than or equal to operator.
    public static bool operator <=(Partition operand1, Partition operand2) => operand1.CompareTo(operand2) <= 0;
}