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

namespace StellaOps.Scanner.Surface.FS;

/// <summary>
/// Canonical manifest describing surface artefacts produced for a scan.
/// </summary>
public sealed record SurfaceManifestDocument
{
    public const string DefaultSchema = "stellaops.surface.manifest@1";

    [JsonPropertyName("schema")]
    public string Schema { get; init; } = DefaultSchema;

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

    [JsonPropertyName("imageDigest")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? ImageDigest { get; init; }
        = null;

    [JsonPropertyName("scanId")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? ScanId { get; init; }
        = null;

    [JsonPropertyName("generatedAt")]
    public DateTimeOffset GeneratedAt { get; init; }
        = DateTimeOffset.MinValue;

    [JsonPropertyName("source")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public SurfaceManifestSource? Source { get; init; }
        = null;

    [JsonPropertyName("artifacts")]
    public IReadOnlyList<SurfaceManifestArtifact> Artifacts { get; init; }
        = ImmutableArray<SurfaceManifestArtifact>.Empty;

    [JsonPropertyName("determinismRoot")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? DeterminismMerkleRoot { get; init; }
        = null;

    [JsonPropertyName("replayBundle")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public ReplayBundleReference? ReplayBundle { get; init; }
        = null;
}

public sealed record ReplayBundleReference
{
    [JsonPropertyName("uri")]
    public string Uri { get; init; } = string.Empty;

    [JsonPropertyName("sha256")]
    public string Sha256 { get; init; } = string.Empty;

    [JsonPropertyName("policyPin")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? PolicySnapshotId { get; init; }
        = null;

    [JsonPropertyName("feedPin")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? FeedSnapshotId { get; init; }
        = null;
}

/// <summary>
/// Identifies the producer of the manifest.
/// </summary>
public sealed record SurfaceManifestSource
{
    [JsonPropertyName("component")]
    public string Component { get; init; } = "scanner.worker";

    [JsonPropertyName("version")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Version { get; init; }
        = null;

    [JsonPropertyName("workerInstance")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? WorkerInstance { get; init; }
        = null;

    [JsonPropertyName("attempt")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public int? Attempt { get; init; }
        = null;
}

/// <summary>
/// Describes a surface artefact referenced by the manifest.
/// </summary>
public sealed record SurfaceManifestArtifact
{
    [JsonPropertyName("kind")]
    public string Kind { get; init; } = string.Empty;

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

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

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

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

    [JsonPropertyName("sizeBytes")]
    public long SizeBytes { get; init; }
        = 0;

    [JsonPropertyName("view")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? View { get; init; }
        = null;

    [JsonPropertyName("storage")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public SurfaceManifestStorage? Storage { get; init; }
        = null;

    [JsonPropertyName("metadata")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public IReadOnlyDictionary<string, string>? Metadata { get; init; }
        = null;
}

/// <summary>
/// Storage descriptor for an artefact.
/// </summary>
public sealed record SurfaceManifestStorage
{
    [JsonPropertyName("bucket")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Bucket { get; init; }
        = null;

    [JsonPropertyName("objectKey")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? ObjectKey { get; init; }
        = null;

    [JsonPropertyName("sizeBytes")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public long? SizeBytes { get; init; }
        = null;

    [JsonPropertyName("contentType")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? ContentType { get; init; }
        = null;
}

/// <summary>
/// Result from publishing a surface manifest.
/// </summary>
public sealed record SurfaceManifestPublishResult(
    string ManifestDigest,
    string ManifestUri,
    string ArtifactId,
    SurfaceManifestDocument Document,
    string? DeterminismMerkleRoot = null);