using Oms.Domain.XhsAggregate.Entities;

namespace Oms.Application.Shared;

/// <summary>
/// 小红书模块通用辅助。
/// </summary>
public static class XhsHelper
{
    public const int OnlineThresholdSeconds = 90;

    public static bool IsAgentOnline(XhsAgent agent, DateTime? now = null)
    {
        if (!string.Equals(agent.Status, "online", StringComparison.OrdinalIgnoreCase))
        {
            return false;
        }

        if (agent.LastHeartbeatTime == null)
        {
            return false;
        }

        var current = now ?? DateTime.Now;
        return (current - agent.LastHeartbeatTime.Value).TotalSeconds <= OnlineThresholdSeconds;
    }

    public static string BuildContentPreview(string? content, int maxLen = 200)
    {
        if (string.IsNullOrWhiteSpace(content))
        {
            return string.Empty;
        }

        var text = content.Trim();
        return text.Length <= maxLen ? text : text[..maxLen];
    }

    public static string? ExtractRecipeNotes(string? recipeJson)
    {
        if (string.IsNullOrWhiteSpace(recipeJson))
        {
            return null;
        }

        try
        {
            using var doc = System.Text.Json.JsonDocument.Parse(recipeJson);
            if (doc.RootElement.TryGetProperty("notes", out var notes))
            {
                var text = notes.GetString();
                if (!string.IsNullOrWhiteSpace(text))
                {
                    return text.Trim();
                }
            }

            if (doc.RootElement.TryGetProperty("body", out var body) &&
                body.TryGetProperty("domain", out var domain))
            {
                return domain.GetString()?.Trim();
            }
        }
        catch
        {
            return null;
        }

        return null;
    }

    public static string SerializeFeedsForPrompt(object? feeds)
    {
        if (feeds == null)
        {
            return string.Empty;
        }

        var json = OmsDocHelper.SerializeJson(feeds) ?? string.Empty;
        return json.Length <= 12000 ? json : json[..12000];
    }

    /// <summary>
    /// Agent 上报的 browse 结果可能是 { summary, raw }，raw 内为 CLI JSON 输出。
    /// </summary>
    public static object? NormalizeBrowseTaskResult(object? result)
    {
        if (result == null)
        {
            return null;
        }

        var json = OmsDocHelper.SerializeJson(result);
        var obj = OmsDocHelper.DeserializeJson<Dictionary<string, object>>(json);
        if (obj == null)
        {
            return result;
        }

        if (obj.ContainsKey("feeds") || obj.ContainsKey("items") || obj.ContainsKey("notes"))
        {
            return obj;
        }

        if (obj.TryGetValue("raw", out var raw) && raw != null)
        {
            var rawText = raw.ToString();
            if (!string.IsNullOrWhiteSpace(rawText))
            {
                var parsed = OmsDocHelper.DeserializeJsonObject(rawText);
                if (parsed != null)
                {
                    return parsed;
                }
            }
        }

        return result;
    }
}