using Serilog;

namespace Poe2Trade.Core;

public class TradeLink
{
    public string Id { get; set; } = "";
    public string Url { get; set; } = "";
    public string Name { get; set; } = "";
    public string Label { get; set; } = "";
    public bool Active { get; set; } = true;
    public LinkMode Mode { get; set; } = LinkMode.Live;
    public PostAction PostAction { get; set; } = PostAction.Stash;
    public string AddedAt { get; set; } = DateTime.UtcNow.ToString("o");
}

public class LinkManager
{
    private readonly Dictionary<string, TradeLink> _links = new();
    private readonly ConfigStore _store;

    public LinkManager(ConfigStore store)
    {
        _store = store;
    }

    public TradeLink AddLink(string url, string name = "", LinkMode? mode = null, PostAction? postAction = null)
    {
        url = StripLive(url);
        var id = ExtractId(url);
        var label = ExtractLabel(url);
        var savedLink = _store.Links.FirstOrDefault(l => l.Url == url);
        var resolvedMode = mode ?? savedLink?.Mode ?? LinkMode.Live;
        var link = new TradeLink
        {
            Id = id,
            Url = url,
            Name = name != "" ? name : savedLink?.Name ?? "",
            Label = label,
            Active = savedLink?.Active ?? true,
            Mode = resolvedMode,
            PostAction = postAction ?? savedLink?.PostAction ?? (resolvedMode == LinkMode.Scrap ? PostAction.Salvage : PostAction.Stash),
            AddedAt = DateTime.UtcNow.ToString("o")
        };
        _links[id] = link;
        _store.AddLink(url, link.Name, link.Mode, link.PostAction);
        Log.Information("Trade link added: {Id} {Url} mode={Mode}", id, url, link.Mode);
        return link;
    }

    public void RemoveLink(string id)
    {
        if (_links.TryGetValue(id, out var link))
        {
            _links.Remove(id);
            _store.RemoveLink(link.Url);
        }
        else
        {
            _store.RemoveLinkById(id);
        }
        Log.Information("Trade link removed: {Id}", id);
    }

    public TradeLink? ToggleLink(string id, bool active)
    {
        if (!_links.TryGetValue(id, out var link)) return null;
        link.Active = active;
        _store.UpdateLinkById(id, l => l.Active = active);
        Log.Information("Trade link {Action}: {Id}", active ? "activated" : "deactivated", id);
        return link;
    }

    public void UpdateName(string id, string name)
    {
        if (!_links.TryGetValue(id, out var link)) return;
        link.Name = name;
        _store.UpdateLinkById(id, l => l.Name = name);
    }

    public TradeLink? UpdateMode(string id, LinkMode mode)
    {
        if (!_links.TryGetValue(id, out var link)) return null;
        link.Mode = mode;
        _store.UpdateLinkById(id, l => l.Mode = mode);
        return link;
    }

    public TradeLink? UpdatePostAction(string id, PostAction postAction)
    {
        if (!_links.TryGetValue(id, out var link)) return null;
        link.PostAction = postAction;
        _store.UpdateLinkById(id, l => l.PostAction = postAction);
        return link;
    }

    public bool IsActive(string id) => _links.TryGetValue(id, out var link) && link.Active;

    public List<TradeLink> GetLinks() => _links.Values.ToList();

    public TradeLink? GetLink(string id) => _links.GetValueOrDefault(id);

    private static string StripLive(string url) =>
        System.Text.RegularExpressions.Regex.Replace(url, @"/live/?$", "");

    private static string ExtractId(string url)
    {
        var parts = url.Split('/');
        return parts.Length > 0 ? parts[^1] : url;
    }

    private static string ExtractLabel(string url)
    {
        try
        {
            var uri = new Uri(url);
            var parts = uri.AbsolutePath.Split('/', StringSplitOptions.RemoveEmptyEntries);
            var poe2Idx = Array.IndexOf(parts, "poe2");
            if (poe2Idx >= 0 && parts.Length > poe2Idx + 2)
            {
                var league = Uri.UnescapeDataString(parts[poe2Idx + 1]);
                var searchId = parts[poe2Idx + 2];
                return $"{league} / {searchId}";
            }
        }
        catch { /* fallback */ }
        return url.Length > 60 ? url[..60] : url;
    }
}