using System.Text.Json;
using System.Text.Json.Serialization;

namespace Fleet.Server;

public sealed class EnrollRequest
{
    [JsonPropertyName("join_token")]
    public string JoinToken { get; set; } = "";

    [JsonPropertyName("name")]
    public string Name { get; set; } = "";

    /// <summary>身份公钥（SPKI，base64）。</summary>
    [JsonPropertyName("pubkey")]
    public string PublicKey { get; set; } = "";

    /// <summary>面向对端节点的 TLS 证书指纹（SHA-256，base64）。</summary>
    [JsonPropertyName("tls_spki")]
    public string TlsSpki { get; set; } = "";

    /// <summary>
    /// 同一把 TLS 密钥的完整公钥（SPKI，base64），必须和 <see cref="TlsSpki"/> 对得上。节点用这把密钥做对等面的签名认证
    /// （和连服务端用的身份密钥是两把独立的密钥），对端要验签就需要完整的公钥，而不只是指纹。
    /// </summary>
    [JsonPropertyName("tls_pubkey")]
    public string TlsPublicKey { get; set; } = "";

    /// <summary>持有证明：对 <c>fleet|v1|enroll|{sha256_hex(join_token)}|{pubkey}</c> 的签名（base64）。</summary>
    [JsonPropertyName("proof")]
    public string Proof { get; set; } = "";

    [JsonPropertyName("node_version")]
    public string NodeVersion { get; set; } = "";

    [JsonPropertyName("meta")]
    public JsonElement? Meta { get; set; }
}

public sealed class EnrollResponse
{
    [JsonPropertyName("node_id")]
    public string NodeId { get; set; } = "";

    /// <summary>pending | active</summary>
    [JsonPropertyName("status")]
    public string Status { get; set; } = "";
}

/// <summary>RFC 9457 problem+json，带 <c>code</c> 扩展字段。</summary>
public sealed class FleetProblem
{
    [JsonPropertyName("type")]
    public string Type { get; set; } = "about:blank";

    [JsonPropertyName("title")]
    public string Title { get; set; } = "";

    [JsonPropertyName("status")]
    public int Status { get; set; }

    [JsonPropertyName("code")]
    public string Code { get; set; } = "";

    [JsonPropertyName("detail")]
    public string? Detail { get; set; }
}

[JsonSourceGenerationOptions(DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull)]
[JsonSerializable(typeof(EnrollRequest))]
[JsonSerializable(typeof(EnrollResponse))]
[JsonSerializable(typeof(FleetProblem))]
internal sealed partial class EnrollmentJsonContext : JsonSerializerContext;