using System.Text.Json.Serialization;

namespace FinalFactory.Rendezvous.Contracts;

[JsonConverter(typeof(SessionListingIdJsonConverter))]
public readonly struct SessionListingId : IEquatable<SessionListingId>
{
    public SessionListingId(Guid value) => Value = GuidIdentifier.RequireNonEmpty(value, nameof(value));
    public Guid Value { get; }
    public static bool TryParse(string? value, out SessionListingId id) =>
        GuidIdentifier.TryParse(value, static guid => new SessionListingId(guid), out id);
    public bool Equals(SessionListingId other) => Value.Equals(other.Value);
    public override bool Equals(object? obj) => obj is SessionListingId other && Equals(other);
    public override int GetHashCode() => Value.GetHashCode();
    public override string ToString() => Value.ToString("D");
    public static bool operator ==(SessionListingId left, SessionListingId right) => left.Equals(right);
    public static bool operator !=(SessionListingId left, SessionListingId right) => !left.Equals(right);
}

[JsonConverter(typeof(LeaseIdJsonConverter))]
public readonly struct LeaseId : IEquatable<LeaseId>
{
    public LeaseId(Guid value) => Value = GuidIdentifier.RequireNonEmpty(value, nameof(value));
    public Guid Value { get; }
    public static bool TryParse(string? value, out LeaseId id) =>
        GuidIdentifier.TryParse(value, static guid => new LeaseId(guid), out id);
    public bool Equals(LeaseId other) => Value.Equals(other.Value);
    public override bool Equals(object? obj) => obj is LeaseId other && Equals(other);
    public override int GetHashCode() => Value.GetHashCode();
    public override string ToString() => Value.ToString("D");
    public static bool operator ==(LeaseId left, LeaseId right) => left.Equals(right);
    public static bool operator !=(LeaseId left, LeaseId right) => !left.Equals(right);
}

[JsonConverter(typeof(JoinAttemptIdJsonConverter))]
public readonly struct JoinAttemptId : IEquatable<JoinAttemptId>
{
    public JoinAttemptId(Guid value) => Value = GuidIdentifier.RequireNonEmpty(value, nameof(value));
    public Guid Value { get; }
    public static bool TryParse(string? value, out JoinAttemptId id) =>
        GuidIdentifier.TryParse(value, static guid => new JoinAttemptId(guid), out id);
    public bool Equals(JoinAttemptId other) => Value.Equals(other.Value);
    public override bool Equals(object? obj) => obj is JoinAttemptId other && Equals(other);
    public override int GetHashCode() => Value.GetHashCode();
    public override string ToString() => Value.ToString("D");
    public static bool operator ==(JoinAttemptId left, JoinAttemptId right) => left.Equals(right);
    public static bool operator !=(JoinAttemptId left, JoinAttemptId right) => !left.Equals(right);
}

[JsonConverter(typeof(MediationHandleJsonConverter))]
public readonly struct MediationHandle : IEquatable<MediationHandle>
{
    public MediationHandle(Guid value) => Value = GuidIdentifier.RequireNonEmpty(value, nameof(value));
    public Guid Value { get; }
    public static bool TryParse(string? value, out MediationHandle id) =>
        GuidIdentifier.TryParse(value, static guid => new MediationHandle(guid), out id);
    public bool Equals(MediationHandle other) => Value.Equals(other.Value);
    public override bool Equals(object? obj) => obj is MediationHandle other && Equals(other);
    public override int GetHashCode() => Value.GetHashCode();
    public override string ToString() => Value.ToString("D");
    public static bool operator ==(MediationHandle left, MediationHandle right) => left.Equals(right);
    public static bool operator !=(MediationHandle left, MediationHandle right) => !left.Equals(right);
}

internal static class GuidIdentifier
{
    public static Guid RequireNonEmpty(Guid value, string parameterName) =>
        value != Guid.Empty
            ? value
            : throw new ArgumentException("Opaque identifiers cannot be empty.", parameterName);

    public static bool TryParse<TIdentifier>(
        string? value,
        Func<Guid, TIdentifier> factory,
        out TIdentifier identifier)
    {
        if (Guid.TryParseExact(value, "D", out Guid guid) && guid != Guid.Empty)
        {
            identifier = factory(guid);
            return true;
        }

        identifier = default!;
        return false;
    }
}

internal abstract class GuidIdentifierJsonConverter<TIdentifier> :
    StringIdentifierJsonConverter<TIdentifier>
{
    protected sealed override string Format(TIdentifier value) => value?.ToString() ?? string.Empty;
}

internal sealed class SessionListingIdJsonConverter : GuidIdentifierJsonConverter<SessionListingId>
{
    protected override SessionListingId Parse(string value) => new(Guid.ParseExact(value, "D"));
}

internal sealed class LeaseIdJsonConverter : GuidIdentifierJsonConverter<LeaseId>
{
    protected override LeaseId Parse(string value) => new(Guid.ParseExact(value, "D"));
}

internal sealed class JoinAttemptIdJsonConverter : GuidIdentifierJsonConverter<JoinAttemptId>
{
    protected override JoinAttemptId Parse(string value) => new(Guid.ParseExact(value, "D"));
}

internal sealed class MediationHandleJsonConverter : GuidIdentifierJsonConverter<MediationHandle>
{
    protected override MediationHandle Parse(string value) => new(Guid.ParseExact(value, "D"));
}