using System;
using System.Collections.Generic;
using System.Text.Json.Serialization;

namespace StellaOps.Cli.Services.Models;

// CLI-LNM-22-002: VEX observation models for CLI commands

/// <summary>
/// Query options for VEX observations.
/// </summary>
internal sealed class VexObservationQuery
{
    [JsonPropertyName("tenant")]
    public string Tenant { get; init; } = string.Empty;

    [JsonPropertyName("vulnerabilityIds")]
    public IReadOnlyList<string> VulnerabilityIds { get; init; } = Array.Empty<string>();

    [JsonPropertyName("productKeys")]
    public IReadOnlyList<string> ProductKeys { get; init; } = Array.Empty<string>();

    [JsonPropertyName("purls")]
    public IReadOnlyList<string> Purls { get; init; } = Array.Empty<string>();

    [JsonPropertyName("cpes")]
    public IReadOnlyList<string> Cpes { get; init; } = Array.Empty<string>();

    [JsonPropertyName("statuses")]
    public IReadOnlyList<string> Statuses { get; init; } = Array.Empty<string>();

    [JsonPropertyName("providerIds")]
    public IReadOnlyList<string> ProviderIds { get; init; } = Array.Empty<string>();

    [JsonPropertyName("limit")]
    public int? Limit { get; init; }

    [JsonPropertyName("cursor")]
    public string? Cursor { get; init; }
}

/// <summary>
/// Response from VEX observation query.
/// </summary>
internal sealed class VexObservationResponse
{
    [JsonPropertyName("observations")]
    public IReadOnlyList<VexObservation> Observations { get; init; } = Array.Empty<VexObservation>();

    [JsonPropertyName("aggregate")]
    public VexObservationAggregate? Aggregate { get; init; }

    [JsonPropertyName("nextCursor")]
    public string? NextCursor { get; init; }

    [JsonPropertyName("hasMore")]
    public bool HasMore { get; init; }
}

/// <summary>
/// VEX observation document.
/// </summary>
internal sealed class VexObservation
{
    [JsonPropertyName("observationId")]
    public string ObservationId { get; init; } = string.Empty;

    [JsonPropertyName("tenant")]
    public string Tenant { get; init; } = string.Empty;

    [JsonPropertyName("vulnerabilityId")]
    public string VulnerabilityId { get; init; } = string.Empty;

    [JsonPropertyName("providerId")]
    public string ProviderId { get; init; } = string.Empty;

    [JsonPropertyName("product")]
    public VexObservationProduct? Product { get; init; }

    [JsonPropertyName("status")]
    public string Status { get; init; } = string.Empty;

    [JsonPropertyName("justification")]
    public string? Justification { get; init; }

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

    [JsonPropertyName("document")]
    public VexObservationDocument? Document { get; init; }

    [JsonPropertyName("firstSeen")]
    public DateTimeOffset FirstSeen { get; init; }

    [JsonPropertyName("lastSeen")]
    public DateTimeOffset LastSeen { get; init; }

    [JsonPropertyName("confidence")]
    public VexObservationConfidence? Confidence { get; init; }

    [JsonPropertyName("createdAt")]
    public DateTimeOffset CreatedAt { get; init; }

    [JsonPropertyName("updatedAt")]
    public DateTimeOffset? UpdatedAt { get; init; }
}

/// <summary>
/// Product information in VEX observation.
/// </summary>
internal sealed class VexObservationProduct
{
    [JsonPropertyName("key")]
    public string Key { get; init; } = string.Empty;

    [JsonPropertyName("name")]
    public string? Name { get; init; }

    [JsonPropertyName("version")]
    public string? Version { get; init; }

    [JsonPropertyName("purl")]
    public string? Purl { get; init; }

    [JsonPropertyName("cpe")]
    public string? Cpe { get; init; }

    [JsonPropertyName("componentIdentifiers")]
    public IReadOnlyList<string> ComponentIdentifiers { get; init; } = Array.Empty<string>();
}

/// <summary>
/// Document reference in VEX observation.
/// </summary>
internal sealed class VexObservationDocument
{
    [JsonPropertyName("format")]
    public string Format { get; init; } = string.Empty;

    [JsonPropertyName("digest")]
    public string Digest { get; init; } = string.Empty;

    [JsonPropertyName("sourceUri")]
    public string SourceUri { get; init; } = string.Empty;

    [JsonPropertyName("revision")]
    public string? Revision { get; init; }

    [JsonPropertyName("signature")]
    public VexObservationSignature? Signature { get; init; }
}

/// <summary>
/// Signature metadata for VEX document.
/// </summary>
internal sealed class VexObservationSignature
{
    [JsonPropertyName("type")]
    public string Type { get; init; } = string.Empty;

    [JsonPropertyName("subject")]
    public string? Subject { get; init; }

    [JsonPropertyName("issuer")]
    public string? Issuer { get; init; }

    [JsonPropertyName("keyId")]
    public string? KeyId { get; init; }

    [JsonPropertyName("verifiedAt")]
    public DateTimeOffset? VerifiedAt { get; init; }

    [JsonPropertyName("transparencyLogReference")]
    public string? TransparencyLogReference { get; init; }
}

/// <summary>
/// Confidence level in VEX observation.
/// </summary>
internal sealed class VexObservationConfidence
{
    [JsonPropertyName("level")]
    public string Level { get; init; } = string.Empty;

    [JsonPropertyName("score")]
    public double? Score { get; init; }

    [JsonPropertyName("method")]
    public string? Method { get; init; }
}

/// <summary>
/// Aggregate data from VEX observation query.
/// </summary>
internal sealed class VexObservationAggregate
{
    [JsonPropertyName("vulnerabilityIds")]
    public IReadOnlyList<string> VulnerabilityIds { get; init; } = Array.Empty<string>();

    [JsonPropertyName("productKeys")]
    public IReadOnlyList<string> ProductKeys { get; init; } = Array.Empty<string>();

    [JsonPropertyName("purls")]
    public IReadOnlyList<string> Purls { get; init; } = Array.Empty<string>();

    [JsonPropertyName("cpes")]
    public IReadOnlyList<string> Cpes { get; init; } = Array.Empty<string>();

    [JsonPropertyName("providerIds")]
    public IReadOnlyList<string> ProviderIds { get; init; } = Array.Empty<string>();

    [JsonPropertyName("statusCounts")]
    public IReadOnlyDictionary<string, int> StatusCounts { get; init; } = new Dictionary<string, int>();
}

/// <summary>
/// VEX linkset query options.
/// </summary>
internal sealed class VexLinksetQuery
{
    [JsonPropertyName("tenant")]
    public string Tenant { get; init; } = string.Empty;

    [JsonPropertyName("vulnerabilityId")]
    public string VulnerabilityId { get; init; } = string.Empty;

    [JsonPropertyName("productKeys")]
    public IReadOnlyList<string> ProductKeys { get; init; } = Array.Empty<string>();

    [JsonPropertyName("purls")]
    public IReadOnlyList<string> Purls { get; init; } = Array.Empty<string>();

    [JsonPropertyName("statuses")]
    public IReadOnlyList<string> Statuses { get; init; } = Array.Empty<string>();
}

/// <summary>
/// VEX linkset response showing linked observations.
/// </summary>
internal sealed class VexLinksetResponse
{
    [JsonPropertyName("vulnerabilityId")]
    public string VulnerabilityId { get; init; } = string.Empty;

    [JsonPropertyName("observations")]
    public IReadOnlyList<VexObservation> Observations { get; init; } = Array.Empty<VexObservation>();

    [JsonPropertyName("summary")]
    public VexLinksetSummary? Summary { get; init; }

    [JsonPropertyName("conflicts")]
    public IReadOnlyList<VexLinksetConflict> Conflicts { get; init; } = Array.Empty<VexLinksetConflict>();
}

/// <summary>
/// Summary of VEX linkset.
/// </summary>
internal sealed class VexLinksetSummary
{
    [JsonPropertyName("totalObservations")]
    public int TotalObservations { get; init; }

    [JsonPropertyName("providers")]
    public IReadOnlyList<string> Providers { get; init; } = Array.Empty<string>();

    [JsonPropertyName("products")]
    public IReadOnlyList<string> Products { get; init; } = Array.Empty<string>();

    [JsonPropertyName("statusCounts")]
    public IReadOnlyDictionary<string, int> StatusCounts { get; init; } = new Dictionary<string, int>();

    [JsonPropertyName("hasConflicts")]
    public bool HasConflicts { get; init; }
}

/// <summary>
/// Conflict between VEX observations.
/// </summary>
internal sealed class VexLinksetConflict
{
    [JsonPropertyName("productKey")]
    public string ProductKey { get; init; } = string.Empty;

    [JsonPropertyName("conflictingStatuses")]
    public IReadOnlyList<string> ConflictingStatuses { get; init; } = Array.Empty<string>();

    [JsonPropertyName("observations")]
    public IReadOnlyList<string> ObservationIds { get; init; } = Array.Empty<string>();

    [JsonPropertyName("description")]
    public string Description { get; init; } = string.Empty;
}