using System.Text.Json.Serialization;

namespace Monitor.Agent;

/// <summary>
/// <c>agent.json</c>：节点本地配置，面板无法修改。其中 <c>limits</c> 是本地硬上限：期望任务集超出这些范围时，
/// 调和器拒绝执行并在 <c>rejected[]</c> 里给出原因。默认不使用 443，目标任务默认不开放。
/// </summary>
public sealed class AgentConfig
{
    [JsonPropertyName("fleet")]
    public FleetSection Fleet { get; set; } = new();

    [JsonPropertyName("listen")]
    public ListenSection Listen { get; set; } = new();

    [JsonPropertyName("limits")]
    public LimitsSection Limits { get; set; } = new();

    [JsonPropertyName("fleet_policy")]
    public PolicySection Policy { get; set; } = new();

    [JsonPropertyName("reporting")]
    public ReportingSection Reporting { get; set; } = new();
}

public sealed class ReportingSection
{
    /// <summary>上报主机资源占用（CPU、内存、磁盘、流量、运行时长，只有汇总数字，没有型号和 IP）。设为 false 就一个字也不上报。</summary>
    [JsonPropertyName("host_stats")]
    public bool HostStats { get; set; } = true;

    [JsonPropertyName("host_interval_s")]
    public int HostIntervalSeconds { get; set; } = 2;
}

public sealed class FleetSection
{
    [JsonPropertyName("server")]
    public string Server { get; set; } = "";

    [JsonPropertyName("identity_dir")]
    public string IdentityDir { get; set; } = "/etc/monitor";
}

public sealed class ListenSection
{
    [JsonPropertyName("bind")]
    public string Bind { get; set; } = "0.0.0.0";

    /// <summary>Probe 控制通道（TLS，点对点会话）。</summary>
    [JsonPropertyName("control_port")]
    public int ControlPort { get; set; } = 7443;

    [JsonPropertyName("udp_ports")]
    public List<int> UdpPorts { get; set; } = [7443];

    [JsonPropertyName("tcp_ports")]
    public List<int> TcpPorts { get; set; } = [7444];
}

public sealed class LimitsSection
{
    [JsonPropertyName("max_total_mbps")]
    public double MaxTotalMbps { get; set; } = 1200;

    [JsonPropertyName("max_total_pps")]
    public long MaxTotalPps { get; set; } = 20_000;

    /// <summary>默认为空：不允许执行任何目标任务。</summary>
    [JsonPropertyName("allowed_target_cidrs")]
    public List<string> AllowedTargetCidrs { get; set; } = [];

    [JsonPropertyName("max_concurrent_tests")]
    public int MaxConcurrentTests { get; set; } = 1;
}

public sealed class PolicySection
{
    /// <summary>在默认值的基础上进一步收窄：只响应这些产品方法。为空表示不收窄。</summary>
    [JsonPropertyName("allow_methods")]
    public List<string>? AllowMethods { get; set; }
}

[JsonSerializable(typeof(AgentConfig))]
public sealed partial class AgentConfigContext : System.Text.Json.Serialization.JsonSerializerContext;