using FsCheck;
using FsCheck.Fluent;
using FsCheck.Xunit;
using Moq;
using Prism.Events;
using XP.Common.Logging.Interfaces;
using XplorePlane.Services.MainViewport;

namespace XplorePlane.Tests.Services
{
    /// <summary>
    /// FsCheck property-based tests for DetectorFramePipelineService configuration correction.
    /// Property 11 validates that values &lt;= 0 are corrected to 1.
    /// </summary>
    public class ConfigCorrectionPropertyTests
    {
        // ── Helpers ──────────────────────────────────────────────────────────

        private static DetectorFramePipelineService CreateServiceWithConfig(
            int acquireCapacity,
            int processCapacity,
            int processEveryN)
        {
            var mockLogger = new Mock<ILoggerService>();
            mockLogger.Setup(l => l.ForModule<DetectorFramePipelineService>()).Returns(mockLogger.Object);

            var mockMainViewport = new Mock<IMainViewportService>();
            var eventAggregator = new EventAggregator();

            return new DetectorFramePipelineService(
                eventAggregator,
                mockMainViewport.Object,
                mockLogger.Object,
                acquireCapacity,
                processCapacity,
                processEveryN);
        }

        // ── Property 11 ──────────────────────────────────────────────────────

        // Feature: live-image-display, Property 11: 配置值下界修正
        // Validates: Requirements 6.3, 6.4
        //
        // For any integer config value <= 0 (ProcessEveryNFrames, AcquireQueueCapacity,
        // ProcessQueueCapacity), DetectorFramePipelineService corrects it to 1.
        [Property(MaxTest = 100)]
        public Property InvalidConfigValues_AreCorrectedToOne()
        {
            // Generate values <= 0 (including 0 and negative integers)
            var nonPositiveGen = Gen.Choose(int.MinValue / 2, 0);

            var gen =
                from acquireCapacity in nonPositiveGen
                from processCapacity in nonPositiveGen
                from processEveryN in nonPositiveGen
                select (acquireCapacity, processCapacity, processEveryN);

            return Prop.ForAll(
                gen.ToArbitrary(),
                tuple =>
                {
                    var (acquireCapacity, processCapacity, processEveryN) = tuple;

                    using var service = CreateServiceWithConfig(acquireCapacity, processCapacity, processEveryN);

                    // All three values must be corrected to 1
                    bool acquireCorrected = service.AcquireQueueCapacity == 1;
                    bool processCorrected = service.ProcessQueueCapacity == 1;
                    bool everyNCorrected = service.ProcessEveryNFrames == 1;

                    return acquireCorrected && processCorrected && everyNCorrected;
                });
        }

        // Additional property: valid positive values are preserved as-is
        [Property(MaxTest = 100)]
        public Property ValidConfigValues_ArePreservedAsIs()
        {
            var positiveGen = Gen.Choose(1, 1000);

            var gen =
                from acquireCapacity in positiveGen
                from processCapacity in positiveGen
                from processEveryN in positiveGen
                select (acquireCapacity, processCapacity, processEveryN);

            return Prop.ForAll(
                gen.ToArbitrary(),
                tuple =>
                {
                    var (acquireCapacity, processCapacity, processEveryN) = tuple;

                    using var service = CreateServiceWithConfig(acquireCapacity, processCapacity, processEveryN);

                    return service.AcquireQueueCapacity == acquireCapacity
                        && service.ProcessQueueCapacity == processCapacity
                        && service.ProcessEveryNFrames == processEveryN;
                });
        }
    }
}