using System.ComponentModel.DataAnnotations;
using StellaOps.AdvisoryAI.Remediation;

namespace StellaOps.AdvisoryAI.WebService.Contracts;

/// <summary>
/// API request for generating a remediation plan.
/// Sprint: SPRINT_20251226_016_AI_remedy_autopilot
/// Task: REMEDY-19
/// </summary>
public sealed record RemediationPlanApiRequest
{
    [Required]
    public required string FindingId { get; init; }

    [Required]
    public required string ArtifactDigest { get; init; }

    [Required]
    public required string VulnerabilityId { get; init; }

    [Required]
    public required string ComponentPurl { get; init; }

    public string RemediationType { get; init; } = "auto";

    public string? RepositoryUrl { get; init; }

    public string TargetBranch { get; init; } = "main";

    public bool AutoCreatePr { get; init; }

    public string? CorrelationId { get; init; }

    public RemediationPlanRequest ToDomain()
    {
        if (!Enum.TryParse<RemediationType>(RemediationType, ignoreCase: true, out var type))
        {
            type = Remediation.RemediationType.Auto;
        }

        return new RemediationPlanRequest
        {
            FindingId = FindingId,
            ArtifactDigest = ArtifactDigest,
            VulnerabilityId = VulnerabilityId,
            ComponentPurl = ComponentPurl,
            RemediationType = type,
            RepositoryUrl = RepositoryUrl,
            TargetBranch = TargetBranch,
            AutoCreatePr = AutoCreatePr,
            CorrelationId = CorrelationId
        };
    }
}

/// <summary>
/// API response for remediation plan.
/// </summary>
public sealed record RemediationPlanApiResponse
{
    public required string PlanId { get; init; }
    public required IReadOnlyList<RemediationStepResponse> Steps { get; init; }
    public required ExpectedDeltaResponse ExpectedDelta { get; init; }
    public required string RiskAssessment { get; init; }
    public required string Authority { get; init; }
    public required bool PrReady { get; init; }
    public string? NotReadyReason { get; init; }
    public required double ConfidenceScore { get; init; }
    public required string ModelId { get; init; }
    public required string GeneratedAt { get; init; }

    public static RemediationPlanApiResponse FromDomain(RemediationPlan plan)
    {
        return new RemediationPlanApiResponse
        {
            PlanId = plan.PlanId,
            Steps = plan.Steps.Select(s => new RemediationStepResponse
            {
                Order = s.Order,
                ActionType = s.ActionType,
                FilePath = s.FilePath,
                Description = s.Description,
                PreviousValue = s.PreviousValue,
                NewValue = s.NewValue,
                Optional = s.Optional,
                Risk = s.Risk.ToString()
            }).ToList(),
            ExpectedDelta = new ExpectedDeltaResponse
            {
                Added = plan.ExpectedDelta.Added,
                Removed = plan.ExpectedDelta.Removed,
                Upgraded = plan.ExpectedDelta.Upgraded,
                NetVulnerabilityChange = plan.ExpectedDelta.NetVulnerabilityChange
            },
            RiskAssessment = plan.RiskAssessment.ToString(),
            Authority = plan.Authority.ToString(),
            PrReady = plan.PrReady,
            NotReadyReason = plan.NotReadyReason,
            ConfidenceScore = plan.ConfidenceScore,
            ModelId = plan.ModelId,
            GeneratedAt = plan.GeneratedAt
        };
    }
}

public sealed record RemediationStepResponse
{
    public required int Order { get; init; }
    public required string ActionType { get; init; }
    public required string FilePath { get; init; }
    public required string Description { get; init; }
    public string? PreviousValue { get; init; }
    public string? NewValue { get; init; }
    public bool Optional { get; init; }
    public required string Risk { get; init; }
}

public sealed record ExpectedDeltaResponse
{
    public required IReadOnlyList<string> Added { get; init; }
    public required IReadOnlyList<string> Removed { get; init; }
    public required IReadOnlyDictionary<string, string> Upgraded { get; init; }
    public required int NetVulnerabilityChange { get; init; }
}

/// <summary>
/// API request for applying remediation (creating PR).
/// Task: REMEDY-20
/// </summary>
public sealed record ApplyRemediationRequest
{
    [Required]
    public required string PlanId { get; init; }

    public string ScmType { get; init; } = "github";
}

/// <summary>
/// API response for PR creation.
/// </summary>
public sealed record PullRequestApiResponse
{
    public required string PrId { get; init; }
    public required int PrNumber { get; init; }
    public required string Url { get; init; }
    public required string BranchName { get; init; }
    public required string Status { get; init; }
    public string? StatusMessage { get; init; }
    public BuildResultResponse? BuildResult { get; init; }
    public TestResultResponse? TestResult { get; init; }
    public DeltaVerdictResponse? DeltaVerdict { get; init; }
    public required string CreatedAt { get; init; }
    public required string UpdatedAt { get; init; }

    public static PullRequestApiResponse FromDomain(PullRequestResult result)
    {
        return new PullRequestApiResponse
        {
            PrId = result.PrId,
            PrNumber = result.PrNumber,
            Url = result.Url,
            BranchName = result.BranchName,
            Status = result.Status.ToString(),
            StatusMessage = result.StatusMessage,
            BuildResult = result.BuildResult != null ? new BuildResultResponse
            {
                Success = result.BuildResult.Success,
                BuildId = result.BuildResult.BuildId,
                BuildUrl = result.BuildResult.BuildUrl,
                ErrorMessage = result.BuildResult.ErrorMessage,
                CompletedAt = result.BuildResult.CompletedAt
            } : null,
            TestResult = result.TestResult != null ? new TestResultResponse
            {
                AllPassed = result.TestResult.AllPassed,
                TotalTests = result.TestResult.TotalTests,
                PassedTests = result.TestResult.PassedTests,
                FailedTests = result.TestResult.FailedTests,
                SkippedTests = result.TestResult.SkippedTests,
                Coverage = result.TestResult.Coverage,
                FailedTestNames = result.TestResult.FailedTestNames,
                CompletedAt = result.TestResult.CompletedAt
            } : null,
            DeltaVerdict = result.DeltaVerdict != null ? new DeltaVerdictResponse
            {
                Improved = result.DeltaVerdict.Improved,
                VulnerabilitiesFixed = result.DeltaVerdict.VulnerabilitiesFixed,
                VulnerabilitiesIntroduced = result.DeltaVerdict.VulnerabilitiesIntroduced,
                VerdictId = result.DeltaVerdict.VerdictId,
                SignatureId = result.DeltaVerdict.SignatureId,
                ComputedAt = result.DeltaVerdict.ComputedAt
            } : null,
            CreatedAt = result.CreatedAt,
            UpdatedAt = result.UpdatedAt
        };
    }
}

public sealed record BuildResultResponse
{
    public required bool Success { get; init; }
    public required string BuildId { get; init; }
    public string? BuildUrl { get; init; }
    public string? ErrorMessage { get; init; }
    public required string CompletedAt { get; init; }
}

public sealed record TestResultResponse
{
    public required bool AllPassed { get; init; }
    public required int TotalTests { get; init; }
    public required int PassedTests { get; init; }
    public required int FailedTests { get; init; }
    public required int SkippedTests { get; init; }
    public double Coverage { get; init; }
    public IReadOnlyList<string> FailedTestNames { get; init; } = Array.Empty<string>();
    public required string CompletedAt { get; init; }
}

public sealed record DeltaVerdictResponse
{
    public required bool Improved { get; init; }
    public required int VulnerabilitiesFixed { get; init; }
    public required int VulnerabilitiesIntroduced { get; init; }
    public required string VerdictId { get; init; }
    public string? SignatureId { get; init; }
    public required string ComputedAt { get; init; }
}