using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;

namespace StellaOps.Cryptography;

public sealed class CryptoRegistryProfiles
{
    public IReadOnlyList<string> PreferredProviders { get; }
    public string ActiveProfile { get; }
    public IReadOnlyDictionary<string, IReadOnlyList<string>> Profiles { get; }

    public CryptoRegistryProfiles(
        IEnumerable<string> preferredProviders,
        string activeProfile,
        IDictionary<string, IReadOnlyList<string>> profiles)
    {
        PreferredProviders = (preferredProviders ?? throw new ArgumentNullException(nameof(preferredProviders)))
            .Where(p => !string.IsNullOrWhiteSpace(p))
            .Select(p => p.Trim())
            .ToArray();

        ActiveProfile = string.IsNullOrWhiteSpace(activeProfile)
            ? throw new ArgumentException("Active profile is required", nameof(activeProfile))
            : activeProfile.Trim();

        Profiles = new ReadOnlyDictionary<string, IReadOnlyList<string>>(profiles ??
            throw new ArgumentNullException(nameof(profiles)));
    }

    public IReadOnlyList<string> ResolvePreferredOrder(string? profileName = null)
    {
        if (!string.IsNullOrWhiteSpace(profileName) && Profiles.TryGetValue(profileName!, out var specific))
        {
            return specific;
        }

        if (Profiles.TryGetValue(ActiveProfile, out var active))
        {
            return active;
        }

        return PreferredProviders;
    }
}