using MAF1.PluginContract;

namespace MAF1.Web;

/// <summary>画布上一个端口的元数据，前端用来渲染圆点和检查器文案。</summary>
public sealed class PortInfo
{
    public string Name { get; init; } = "";
    public string Type { get; init; } = "";
    public string Description { get; init; } = "";
    public bool Required { get; init; }
}

/// <summary>
/// 一种可放到画布上的节点类型。Origin=system 走进程内 Handler；Origin=plugin 走独立进程。
/// </summary>
public sealed class AgentTypeInfo
{
    public string Type { get; init; } = "";
    public string Name { get; init; } = "";
    public string Description { get; init; } = "";
    public string Origin { get; set; } = "system";
    public string Version { get; init; } = "";
    public string Folder { get; init; } = "";
    public bool Overridden { get; set; }

    /// <summary>
    /// 进程内实现。系统节点必填；插件节点为 None，走独立进程。
    /// </summary>
    public SystemHandler Handler { get; init; }

    public IReadOnlyList<PortInfo> Inputs { get; init; } = [];
    public IReadOnlyList<PortInfo> Outputs { get; init; } = [];
    public IReadOnlyList<PluginCredentialNeed> Credentials { get; init; } = [];
}

/// <summary>系统节点绑定到哪个 C# 实现。插件节点 Handler 保持 None。</summary>
public enum SystemHandler
{
    None = 0,
    FileCity,
    Weather,
}

/// <summary>
/// 写死在宿主里的两种系统节点。插件 id 若与 Type 冲突，运行时优先插件进程。
/// </summary>
public static class AgentCatalog
{
    public static AgentTypeInfo? FindSystem(string type)
        => SystemNodes.FirstOrDefault(item => item.Type.Equals(type, StringComparison.OrdinalIgnoreCase));

    public static IReadOnlyList<AgentTypeInfo> SystemNodes { get; } =
    [
        new()
        {
            Type = "fileCity-system",
            Name = "FileCityAgent-System",
            Description = "读取指定文本文件，判断并抽出有效城市名（系统内置实现）。",
            Origin = "system",
            Handler = SystemHandler.FileCity,
            Inputs =
            [
                new PortInfo { Name = "filePath", Type = "string", Description = "本地文件路径，例如 Data/cities.txt", Required = true },
            ],
            Outputs =
            [
                new PortInfo { Name = "hasValidCities", Type = "bool", Description = "是否存在有效城市" },
                new PortInfo { Name = "cities", Type = "string[]", Description = "有效城市名列表" },
                new PortInfo { Name = "reason", Type = "string", Description = "判断说明" },
                new PortInfo { Name = "raw", Type = "string", Description = "Agent 原始文本" },
            ],
            Credentials =
            [
                new PluginCredentialNeed
                {
                    Name = "llm",
                    Type = "openai-compatible",
                    Required = true,
                    Description = "OpenAI 兼容接口：endpoint + apiKey + model",
                },
            ],
        },
        new()
        {
            Type = "weather-system",
            Name = "WeatherAgent-System",
            Description = "按城市列表查询天气并汇总（系统内置实现）。",
            Origin = "system",
            Handler = SystemHandler.Weather,
            Inputs =
            [
                new PortInfo { Name = "cities", Type = "string[]", Description = "要查询的城市名列表", Required = true },
            ],
            Outputs =
            [
                new PortInfo { Name = "summary", Type = "string", Description = "天气汇总文本" },
            ],
            Credentials =
            [
                new PluginCredentialNeed
                {
                    Name = "llm",
                    Type = "openai-compatible",
                    Required = true,
                    Description = "OpenAI 兼容接口：endpoint + apiKey + model",
                },
            ],
        },
    ];
}