using System.Text.Json.Serialization;

namespace ClawdDotNet.Core.Cases;

/// <summary>#689: The limits that make escalation end.</summary>
public sealed class CaseSettings
{
    /// <summary>
    /// Hours the agents have to solve a case. After that a human is called — a case nobody
    /// can solve must not exist. Short rather than long (decision of 2026-09-22).
    /// </summary>
    [JsonPropertyName("deadlineHours")]
    public double DeadlineHours { get; set; } = 4;

    /// <summary>
    /// Escalations one unit may raise in 24 hours. Beyond that each new one goes straight to
    /// a human: a unit that hands everything up is itself a finding, and every level costs a run.
    /// </summary>
    [JsonPropertyName("escalationsPerUnitPerDay")]
    public int EscalationsPerUnitPerDay { get; set; } = 10;

    /// <summary>#690: Who decides at the top of the tree.</summary>
    [JsonPropertyName("top")]
    public TopSettings Top { get; set; } = new();

    public TimeSpan Deadline => TimeSpan.FromHours(Math.Clamp(DeadlineHours, 0.25, 24 * 14));
}

/// <summary>#690: How the top of the tree is filled — a role, not a person.</summary>
[JsonConverter(typeof(JsonStringEnumConverter<TopMode>))]
public enum TopMode
{
    /// <summary>A human. Cases wait in the web interface.</summary>
    Human,

    /// <summary>An agent — a strong model that runs rarely, decides and gives reasons.</summary>
    Agent,

    /// <summary>
    /// The human first; without an answer in <see cref="TopSettings.HumanFirstHours"/> the agent
    /// decides and presents the decision. For an organisation that goes on at night.
    /// </summary>
    HumanFirst
}

public sealed class TopSettings
{
    [JsonPropertyName("mode")]
    public TopMode Mode { get; set; } = TopMode.Human;

    /// <summary>The deciding agent, for <see cref="TopMode.Agent"/> and <see cref="TopMode.HumanFirst"/>.</summary>
    [JsonPropertyName("agentId")]
    public string? AgentId { get; set; }

    /// <summary>How long the human has before the agent decides, in <see cref="TopMode.HumanFirst"/>.</summary>
    [JsonPropertyName("humanFirstHours")]
    public double HumanFirstHours { get; set; } = 2;

    public TimeSpan HumanFirst => TimeSpan.FromHours(Math.Clamp(HumanFirstHours, 0.25, 24 * 7));

    /// <summary>Whether an agent takes part at the top at all.</summary>
    [JsonIgnore]
    public bool UsesAgent => Mode != TopMode.Human && !string.IsNullOrWhiteSpace(AgentId);
}