// Copyright (C) 2025, The Duplicati Team
// https://duplicati.com, hello@duplicati.com
// 
// 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.Text.RegularExpressions;

namespace ReleaseBuilder;

/// <summary>
/// The operating systems we can build for
/// </summary>
public enum OSType
{
    /// <summary>
    /// The Windows OS
    /// </summary>
    Windows,
    /// <summary>
    /// The MacOS
    /// </summary>
    MacOS,
    /// <summary>
    /// Linux, any variant
    /// </summary>
    Linux
}

/// <summary>
/// The system architecture
/// </summary>
public enum ArchType
{
    /// <summary>
    /// An x86 64-bit architecture
    /// </summary>
    x64,
    /// <summary>
    /// An x86 32-bit architecture
    /// </summary>
    x86,
    /// <summary>
    /// The ARM-64 architecture
    /// </summary>
    Arm64,
    /// <summary>
    /// The ARM v7 architecture
    /// </summary>
    Arm7
}

/// <summary>
/// The different package types
/// </summary>
public enum PackageType
{
    /// <summary>
    /// The basic ZIP package
    /// </summary>
    Zip,
    /// <summary>
    /// The Windows installer format
    /// </summary>
    MSI,
    /// <summary>
    /// The debian package format
    /// </summary>
    Deb,
    /// <summary>
    /// The Redhat package manager format
    /// </summary>
    RPM,
    /// <summary>
    /// Docker build
    /// </summary>
    Docker,
    /// <summary>
    /// Apple Disk Image
    /// </summary>
    DMG,
    /// <summary>
    /// The MacOS pkg format 
    /// </summary>
    MacPkg,
    /// <summary>
    /// The synology Spk format
    /// </summary>
    SynologySpk
}

/// <summary>
/// The interface type
/// </summary>
public enum InterfaceType
{
    /// <summary>
    /// The GUI interface
    /// </summary>
    GUI,
    /// <summary>
    /// The commandline interface
    /// </summary>
    Cli,
    /// <summary>
    /// The agent interface
    /// </summary>
    Agent
}

/// <summary>
/// Mapping of a package target
/// </summary>
/// <param name="OS">The operating system</param>
/// <param name="Arch">The CPU architecture</param>
/// <param name="Interface">The interface type</param>
/// <param name="Package">The installer package</param>
public record PackageTarget(OSType OS, ArchType Arch, InterfaceType Interface, PackageType Package)
{
    /// <summary>
    /// Returns a string representation of the OS.
    /// </summary>
    /// <param name="os">The operating system</param>
    /// <returns>The operating system id-string</returns>
    /// <remarks>This is using .Net RID: https://learn.microsoft.com/en-us/dotnet/core/rid-catalog</remarks>
    private static string OSToString(OSType os)
        => os switch
        {
            OSType.Windows => "win",
            OSType.Linux => "linux",
            OSType.MacOS => "osx",
            _ => throw new Exception("Not supported OS")
        };

    /// <summary>
    /// Returns a string representation of the CPU architecture
    /// </summary>
    /// <param name="arch">The architecture</param>
    /// <returns>The CPU architecture id-string</returns>
    /// <remarks>This is using .Net RID: https://learn.microsoft.com/en-us/dotnet/core/rid-catalog</remarks>
    private static string ArchToString(ArchType arch)
        => arch switch
        {
            ArchType.x64 => "x64",
            ArchType.x86 => "x86",
            ArchType.Arm64 => "arm64",
            ArchType.Arm7 => "arm7",
            _ => throw new Exception("Not supported arch")
        };

    /// <summary>
    /// Returns a string representation of the package type
    /// </summary>
    /// <param name="package">The package type</param>
    /// <returns>The package type id-string</returns>
    private static string PackageToString(PackageType package)
        => package switch
        {
            PackageType.Zip => "zip",
            PackageType.MSI => "msi",
            PackageType.Deb => "deb",
            PackageType.RPM => "rpm",
            PackageType.DMG => "dmg",
            PackageType.MacPkg => "pkg",
            PackageType.SynologySpk => "spk",
            PackageType.Docker => "docker",
            _ => throw new Exception("Not supported package type")
        };

    /// <summary>
    /// Returns a string representation of the interface type
    /// </summary>
    /// <param name="interfaceType">The interface type</param>
    /// <returns>The interface type id-string</returns>
    private static string InterfaceToString(InterfaceType interfaceType)
        => interfaceType switch
        {
            InterfaceType.GUI => "gui",
            InterfaceType.Cli => "cli",
            InterfaceType.Agent => "agent",
            _ => throw new Exception("Not supported interface type")
        };


    /// <summary>
    /// Gets the RID string for the operating system
    /// </summary>
    public string OSString => OSToString(OS);

    /// <summary>
    /// Gets the RID string for the CPU architecture
    /// </summary>
    public string ArchString => ArchToString(Arch);

    /// <summary>
    /// Gets the id string for the interface
    /// </summary>
    public string InterfaceString => InterfaceToString(Interface);

    /// <summary>
    /// Gets the id string for the package
    /// </summary>
    public string PackageString => PackageToString(Package);

    /// <summary>
    /// String map of operating system RIDs
    /// </summary>
    private static Dictionary<string, OSType> OSTypeParse = Enum.GetValues<OSType>().ToDictionary(OSToString, x => x, StringComparer.OrdinalIgnoreCase);
    /// <summary>
    /// String map of architecture RIDs
    /// </summary>
    private static Dictionary<string, ArchType> ArchTypeParse = Enum.GetValues<ArchType>().ToDictionary(ArchToString, x => x, StringComparer.OrdinalIgnoreCase);
    /// <summary>
    /// String map of package type ids
    /// </summary>
    private static Dictionary<string, PackageType> PackageTypeParse = Enum.GetValues<PackageType>().ToDictionary(PackageToString, x => x, StringComparer.OrdinalIgnoreCase);
    /// <summary>
    /// String map of interface type ids
    /// </summary>
    private static Dictionary<string, InterfaceType> InterfaceTypeParse = Enum.GetValues<InterfaceType>().ToDictionary(InterfaceToString, x => x, StringComparer.OrdinalIgnoreCase);

    /// <summary>
    /// The RID string for .Net build commands
    /// </summary>
    public string BuildArchString => $"{OSString}-{ArchString}";

    /// <summary>
    /// The target string for the builds
    /// </summary>
    public string BuildTargetString => $"{BuildArchString}-{InterfaceString}";

    /// <summary>
    /// The package string for the updater
    /// </summary>
    public string PackageTargetString => $"{BuildTargetString}.{PackageString}";

    /// <summary>
    /// Parses a string representation of a package target
    /// </summary>
    /// <param name="id">The id to parse</param>
    /// <returns>The <see cref="PackageTarget"/> matching the string</returns>
    public static PackageTarget ParsePackageId(string id)
    {
        var re = Regex.Match(id, @"(?<os>\w+)-(?<arch>\w+)-(?<int>\w+)\.(?<package>\w+)");
        if (!re.Success)
            throw new Exception($"Invalid package id: {id}");

        if (!OSTypeParse.TryGetValue(re.Groups["os"].Value, out var os))
            throw new Exception($"Not supported OS type: {re.Groups["os"].Value}");
        if (!ArchTypeParse.TryGetValue(re.Groups["arch"].Value, out var arch))
            throw new Exception($"Not supported Arch type: {re.Groups["arch"].Value}");
        if (!InterfaceTypeParse.TryGetValue(re.Groups["int"].Value, out var interfaceType))
            throw new Exception($"Not supported Interface type: {re.Groups["int"].Value}");
        if (!PackageTypeParse.TryGetValue(re.Groups["package"].Value, out var package))
            throw new Exception($"Not supported Package type: {re.Groups["package"].Value}");

        return new PackageTarget(os, arch, interfaceType, package);
    }
}