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

namespace StellaOps.Scanner.WebService.Contracts;

internal static class OrchestratorEventKinds
{
    public const string ScannerReportReady = "scanner.event.report.ready";
    public const string ScannerScanCompleted = "scanner.event.scan.completed";
    public const string ScannerScanStarted = "scanner.event.scan.started";
    public const string ScannerScanFailed = "scanner.event.scan.failed";
    public const string ScannerSbomGenerated = "scanner.event.sbom.generated";
    public const string ScannerVulnerabilityDetected = "scanner.event.vulnerability.detected";
}

internal sealed record OrchestratorEvent
{
    [JsonPropertyName("eventId")]
    [JsonPropertyOrder(0)]
    public Guid EventId { get; init; }

    [JsonPropertyName("kind")]
    [JsonPropertyOrder(1)]
    public string Kind { get; init; } = string.Empty;

    [JsonPropertyName("version")]
    [JsonPropertyOrder(2)]
    public int Version { get; init; } = 1;

    [JsonPropertyName("tenant")]
    [JsonPropertyOrder(3)]
    public string Tenant { get; init; } = string.Empty;

    [JsonPropertyName("occurredAt")]
    [JsonPropertyOrder(4)]
    public DateTimeOffset OccurredAt { get; init; }

    [JsonPropertyName("recordedAt")]
    [JsonPropertyOrder(5)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public DateTimeOffset? RecordedAt { get; init; }

    [JsonPropertyName("source")]
    [JsonPropertyOrder(6)]
    public string Source { get; init; } = string.Empty;

    [JsonPropertyName("idempotencyKey")]
    [JsonPropertyOrder(7)]
    public string IdempotencyKey { get; init; } = string.Empty;

    [JsonPropertyName("correlationId")]
    [JsonPropertyOrder(8)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? CorrelationId { get; init; }

    [JsonPropertyName("traceId")]
    [JsonPropertyOrder(9)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? TraceId { get; init; }

    [JsonPropertyName("spanId")]
    [JsonPropertyOrder(10)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? SpanId { get; init; }

    [JsonPropertyName("scope")]
    [JsonPropertyOrder(11)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public OrchestratorEventScope? Scope { get; init; }

    [JsonPropertyName("payload")]
    [JsonPropertyOrder(12)]
    public OrchestratorEventPayload Payload { get; init; } = default!;

    [JsonPropertyName("attributes")]
    [JsonPropertyOrder(13)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public ImmutableSortedDictionary<string, string>? Attributes { get; init; }

    [JsonPropertyName("notifier")]
    [JsonPropertyOrder(14)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public NotifierIngestionMetadata? Notifier { get; init; }
}

/// <summary>
/// Metadata for Notifier service ingestion per orchestrator-envelope.schema.json.
/// </summary>
internal sealed record NotifierIngestionMetadata
{
    [JsonPropertyName("severityThresholdMet")]
    [JsonPropertyOrder(0)]
    public bool SeverityThresholdMet { get; init; }

    [JsonPropertyName("notificationChannels")]
    [JsonPropertyOrder(1)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public IReadOnlyList<string>? NotificationChannels { get; init; }

    [JsonPropertyName("digestEligible")]
    [JsonPropertyOrder(2)]
    public bool DigestEligible { get; init; } = true;

    [JsonPropertyName("immediateDispatch")]
    [JsonPropertyOrder(3)]
    public bool ImmediateDispatch { get; init; }

    [JsonPropertyName("priority")]
    [JsonPropertyOrder(4)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Priority { get; init; }
}

internal sealed record OrchestratorEventScope
{
    [JsonPropertyName("namespace")]
    [JsonPropertyOrder(0)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Namespace { get; init; }

    [JsonPropertyName("repo")]
    [JsonPropertyOrder(1)]
    public string Repo { get; init; } = string.Empty;

    [JsonPropertyName("digest")]
    [JsonPropertyOrder(2)]
    public string Digest { get; init; } = string.Empty;

    [JsonPropertyName("component")]
    [JsonPropertyOrder(3)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Component { get; init; }

    [JsonPropertyName("image")]
    [JsonPropertyOrder(4)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Image { get; init; }
}

internal abstract record OrchestratorEventPayload;

internal sealed record ReportReadyEventPayload : OrchestratorEventPayload
{
    [JsonPropertyName("reportId")]
    [JsonPropertyOrder(0)]
    public string ReportId { get; init; } = string.Empty;

    [JsonPropertyName("scanId")]
    [JsonPropertyOrder(1)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? ScanId { get; init; }

    [JsonPropertyName("imageDigest")]
    [JsonPropertyOrder(2)]
    public string ImageDigest { get; init; } = string.Empty;

    [JsonPropertyName("generatedAt")]
    [JsonPropertyOrder(3)]
    public DateTimeOffset GeneratedAt { get; init; }

    [JsonPropertyName("verdict")]
    [JsonPropertyOrder(4)]
    public string Verdict { get; init; } = string.Empty;

    [JsonPropertyName("summary")]
    [JsonPropertyOrder(5)]
    public ReportSummaryDto Summary { get; init; } = new();

    [JsonPropertyName("delta")]
    [JsonPropertyOrder(6)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public ReportDeltaPayload? Delta { get; init; }

    [JsonPropertyName("quietedFindingCount")]
    [JsonPropertyOrder(7)]
    public int QuietedFindingCount { get; init; }

    [JsonPropertyName("policy")]
    [JsonPropertyOrder(8)]
    public ReportPolicyDto Policy { get; init; } = new();

    [JsonPropertyName("links")]
    [JsonPropertyOrder(9)]
    public ReportLinksPayload Links { get; init; } = new();

    [JsonPropertyName("dsse")]
    [JsonPropertyOrder(10)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public DsseEnvelopeDto? Dsse { get; init; }

    [JsonPropertyName("report")]
    [JsonPropertyOrder(11)]
    public ReportDocumentDto Report { get; init; } = new();
}

internal sealed record ScanCompletedEventPayload : OrchestratorEventPayload
{
    [JsonPropertyName("reportId")]
    [JsonPropertyOrder(0)]
    public string ReportId { get; init; } = string.Empty;

    [JsonPropertyName("scanId")]
    [JsonPropertyOrder(1)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? ScanId { get; init; }

    [JsonPropertyName("imageDigest")]
    [JsonPropertyOrder(2)]
    public string ImageDigest { get; init; } = string.Empty;

    [JsonPropertyName("verdict")]
    [JsonPropertyOrder(3)]
    public string Verdict { get; init; } = string.Empty;

    [JsonPropertyName("summary")]
    [JsonPropertyOrder(4)]
    public ReportSummaryDto Summary { get; init; } = new();

    [JsonPropertyName("delta")]
    [JsonPropertyOrder(5)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public ReportDeltaPayload? Delta { get; init; }

    [JsonPropertyName("policy")]
    [JsonPropertyOrder(6)]
    public ReportPolicyDto Policy { get; init; } = new();

    [JsonPropertyName("findings")]
    [JsonPropertyOrder(7)]
    public IReadOnlyList<FindingSummaryPayload> Findings { get; init; } = Array.Empty<FindingSummaryPayload>();

    [JsonPropertyName("links")]
    [JsonPropertyOrder(8)]
    public ReportLinksPayload Links { get; init; } = new();

    [JsonPropertyName("dsse")]
    [JsonPropertyOrder(9)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public DsseEnvelopeDto? Dsse { get; init; }

    [JsonPropertyName("report")]
    [JsonPropertyOrder(10)]
    public ReportDocumentDto Report { get; init; } = new();
}

internal sealed record ReportDeltaPayload
{
    [JsonPropertyName("newCritical")]
    [JsonPropertyOrder(0)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public int? NewCritical { get; init; }

    [JsonPropertyName("newHigh")]
    [JsonPropertyOrder(1)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public int? NewHigh { get; init; }

    [JsonPropertyName("kev")]
    [JsonPropertyOrder(2)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public IReadOnlyList<string>? Kev { get; init; }
}

internal sealed record ReportLinksPayload
{
    [JsonPropertyName("report")]
    [JsonPropertyOrder(0)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public LinkTarget? Report { get; init; }

    [JsonPropertyName("policy")]
    [JsonPropertyOrder(1)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public LinkTarget? Policy { get; init; }

    [JsonPropertyName("attestation")]
    [JsonPropertyOrder(2)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public LinkTarget? Attestation { get; init; }
}

internal sealed record LinkTarget(
    [property: JsonPropertyName("ui"), JsonPropertyOrder(0), JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)] string? Ui,
    [property: JsonPropertyName("api"), JsonPropertyOrder(1), JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)] string? Api)
{
    public static LinkTarget? Create(string? ui, string? api)
    {
        if (string.IsNullOrWhiteSpace(ui) && string.IsNullOrWhiteSpace(api))
        {
            return null;
        }

        return new LinkTarget(
            string.IsNullOrWhiteSpace(ui) ? null : ui,
            string.IsNullOrWhiteSpace(api) ? null : api);
    }
}

internal sealed record FindingSummaryPayload
{
    [JsonPropertyName("id")]
    [JsonPropertyOrder(0)]
    public string Id { get; init; } = string.Empty;

    [JsonPropertyName("severity")]
    [JsonPropertyOrder(1)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Severity { get; init; }

    [JsonPropertyName("cve")]
    [JsonPropertyOrder(2)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Cve { get; init; }

    [JsonPropertyName("purl")]
    [JsonPropertyOrder(3)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Purl { get; init; }

    [JsonPropertyName("reachability")]
    [JsonPropertyOrder(4)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Reachability { get; init; }
}

/// <summary>
/// Payload for scanner.event.scan.started events.
/// </summary>
internal sealed record ScanStartedEventPayload : OrchestratorEventPayload
{
    [JsonPropertyName("scanId")]
    [JsonPropertyOrder(0)]
    public string ScanId { get; init; } = string.Empty;

    [JsonPropertyName("jobId")]
    [JsonPropertyOrder(1)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? JobId { get; init; }

    [JsonPropertyName("target")]
    [JsonPropertyOrder(2)]
    public ScanTargetPayload Target { get; init; } = new();

    [JsonPropertyName("startedAt")]
    [JsonPropertyOrder(3)]
    public DateTimeOffset StartedAt { get; init; }

    [JsonPropertyName("status")]
    [JsonPropertyOrder(4)]
    public string Status { get; init; } = "started";
}

/// <summary>
/// Payload for scanner.event.scan.failed events.
/// </summary>
internal sealed record ScanFailedEventPayload : OrchestratorEventPayload
{
    [JsonPropertyName("scanId")]
    [JsonPropertyOrder(0)]
    public string ScanId { get; init; } = string.Empty;

    [JsonPropertyName("jobId")]
    [JsonPropertyOrder(1)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? JobId { get; init; }

    [JsonPropertyName("target")]
    [JsonPropertyOrder(2)]
    public ScanTargetPayload Target { get; init; } = new();

    [JsonPropertyName("startedAt")]
    [JsonPropertyOrder(3)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public DateTimeOffset? StartedAt { get; init; }

    [JsonPropertyName("failedAt")]
    [JsonPropertyOrder(4)]
    public DateTimeOffset FailedAt { get; init; }

    [JsonPropertyName("durationMs")]
    [JsonPropertyOrder(5)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public long? DurationMs { get; init; }

    [JsonPropertyName("status")]
    [JsonPropertyOrder(6)]
    public string Status { get; init; } = "failed";

    [JsonPropertyName("error")]
    [JsonPropertyOrder(7)]
    public ScanErrorPayload Error { get; init; } = new();
}

/// <summary>
/// Payload for scanner.event.sbom.generated events.
/// </summary>
internal sealed record SbomGeneratedEventPayload : OrchestratorEventPayload
{
    [JsonPropertyName("scanId")]
    [JsonPropertyOrder(0)]
    public string ScanId { get; init; } = string.Empty;

    [JsonPropertyName("sbomId")]
    [JsonPropertyOrder(1)]
    public string SbomId { get; init; } = string.Empty;

    [JsonPropertyName("target")]
    [JsonPropertyOrder(2)]
    public ScanTargetPayload Target { get; init; } = new();

    [JsonPropertyName("generatedAt")]
    [JsonPropertyOrder(3)]
    public DateTimeOffset GeneratedAt { get; init; }

    [JsonPropertyName("format")]
    [JsonPropertyOrder(4)]
    public string Format { get; init; } = "cyclonedx";

    [JsonPropertyName("specVersion")]
    [JsonPropertyOrder(5)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? SpecVersion { get; init; }

    [JsonPropertyName("componentCount")]
    [JsonPropertyOrder(6)]
    public int ComponentCount { get; init; }

    [JsonPropertyName("sbomRef")]
    [JsonPropertyOrder(7)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? SbomRef { get; init; }

    [JsonPropertyName("digest")]
    [JsonPropertyOrder(8)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Digest { get; init; }
}

/// <summary>
/// Payload for scanner.event.vulnerability.detected events.
/// </summary>
internal sealed record VulnerabilityDetectedEventPayload : OrchestratorEventPayload
{
    [JsonPropertyName("scanId")]
    [JsonPropertyOrder(0)]
    public string ScanId { get; init; } = string.Empty;

    [JsonPropertyName("vulnerability")]
    [JsonPropertyOrder(1)]
    public VulnerabilityInfoPayload Vulnerability { get; init; } = new();

    [JsonPropertyName("affectedComponent")]
    [JsonPropertyOrder(2)]
    public ComponentInfoPayload AffectedComponent { get; init; } = new();

    [JsonPropertyName("reachability")]
    [JsonPropertyOrder(3)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Reachability { get; init; }

    [JsonPropertyName("detectedAt")]
    [JsonPropertyOrder(4)]
    public DateTimeOffset DetectedAt { get; init; }
}

/// <summary>
/// Target being scanned.
/// </summary>
internal sealed record ScanTargetPayload
{
    [JsonPropertyName("type")]
    [JsonPropertyOrder(0)]
    public string Type { get; init; } = "container_image";

    [JsonPropertyName("identifier")]
    [JsonPropertyOrder(1)]
    public string Identifier { get; init; } = string.Empty;

    [JsonPropertyName("digest")]
    [JsonPropertyOrder(2)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Digest { get; init; }

    [JsonPropertyName("tag")]
    [JsonPropertyOrder(3)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Tag { get; init; }

    [JsonPropertyName("platform")]
    [JsonPropertyOrder(4)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Platform { get; init; }
}

/// <summary>
/// Error information for failed scans.
/// </summary>
internal sealed record ScanErrorPayload
{
    [JsonPropertyName("code")]
    [JsonPropertyOrder(0)]
    public string Code { get; init; } = "SCAN_FAILED";

    [JsonPropertyName("message")]
    [JsonPropertyOrder(1)]
    public string Message { get; init; } = string.Empty;

    [JsonPropertyName("details")]
    [JsonPropertyOrder(2)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public ImmutableDictionary<string, string>? Details { get; init; }

    [JsonPropertyName("recoverable")]
    [JsonPropertyOrder(3)]
    public bool Recoverable { get; init; }
}

/// <summary>
/// Vulnerability information.
/// </summary>
internal sealed record VulnerabilityInfoPayload
{
    [JsonPropertyName("id")]
    [JsonPropertyOrder(0)]
    public string Id { get; init; } = string.Empty;

    [JsonPropertyName("severity")]
    [JsonPropertyOrder(1)]
    public string Severity { get; init; } = "unknown";

    [JsonPropertyName("cvssScore")]
    [JsonPropertyOrder(2)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public double? CvssScore { get; init; }

    [JsonPropertyName("cvssVector")]
    [JsonPropertyOrder(3)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? CvssVector { get; init; }

    [JsonPropertyName("title")]
    [JsonPropertyOrder(4)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Title { get; init; }

    [JsonPropertyName("fixAvailable")]
    [JsonPropertyOrder(5)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public bool? FixAvailable { get; init; }

    [JsonPropertyName("fixedVersion")]
    [JsonPropertyOrder(6)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? FixedVersion { get; init; }

    [JsonPropertyName("kevListed")]
    [JsonPropertyOrder(7)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public bool? KevListed { get; init; }

    [JsonPropertyName("epssScore")]
    [JsonPropertyOrder(8)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public double? EpssScore { get; init; }
}

/// <summary>
/// Component information.
/// </summary>
internal sealed record ComponentInfoPayload
{
    [JsonPropertyName("purl")]
    [JsonPropertyOrder(0)]
    public string Purl { get; init; } = string.Empty;

    [JsonPropertyName("name")]
    [JsonPropertyOrder(1)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Name { get; init; }

    [JsonPropertyName("version")]
    [JsonPropertyOrder(2)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Version { get; init; }

    [JsonPropertyName("ecosystem")]
    [JsonPropertyOrder(3)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Ecosystem { get; init; }

    [JsonPropertyName("location")]
    [JsonPropertyOrder(4)]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? Location { get; init; }
}