using Microsoft.Extensions.Configuration;
using Moq;
using sh.actions.package_cleanup.Models;
using sh.actions.package_cleanup.Service;
using Xunit;

namespace sh.actions.package_cleanup.Tests.Service;

public class PackageServiceDateVersionTests
{
    private Mock<IConfiguration> _configurationMock;
    private Mock<IGiteaPackageService> _giteaPackageServiceMock;
    private IPackageService _packageService;

    private void SetupMocks()
    {
        _configurationMock = new Mock<IConfiguration>();
        _giteaPackageServiceMock = new Mock<IGiteaPackageService>();
        _packageService = new PackageService(_configurationMock.Object, _giteaPackageServiceMock.Object);
    }
    
    // ...existing code...

    #region Version Detection Tests

    [Theory]
    [InlineData("2024.12.25.1")]
    [InlineData("2025.2.14.1")]
    [InlineData("2026.1.1.100")]
    [InlineData("2023.12.31.999")]
    public void FilterPackagesToDelete_WithDateVersions_ShouldIdentifyCorrectly(string version)
    {
        // Arrange
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Single prod date version should not be deleted
        Assert.NotNull(result);
        Assert.Empty(result);
    }

    [Theory]
    [InlineData("2024.12.25.1-dev")]
    [InlineData("2025.2.14.1-alpha")]
    [InlineData("2026.1.1.100-beta")]
    [InlineData("2023.12.31.999-rc")]
    public void FilterPackagesToDelete_WithDateVersionsAndSuffixes_ShouldIdentifyCorrectly(string version)
    {
        // Arrange
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Single prerelease/dev date version should be kept
        Assert.NotNull(result);
        Assert.Empty(result);
    }

    #endregion

    #region Prod Release Tests - Date Versioning

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithOnlyProdReleases_ShouldReturnEmpty()
    {
        // Arrange - CLEAN_PROD_VERSIONS not set, defaults to false
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            new()
            {
                Id = 1, Name = "test", Version = "2025.12.20.1", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-30)
            },
            new()
            {
                Id = 2, Name = "test", Version = "2025.12.25.1", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-20)
            },
            new()
            {
                Id = 3, Name = "test", Version = "2026.1.5.1", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-10)
            }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Prod releases should be protected by default (CLEAN_PROD_VERSIONS=false)
        Assert.Empty(result);
    }

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithProdReleasesAndCleaningEnabled_ShouldDeleteOldest()
    {
        // Arrange
        SetupMocks();
        _configurationMock.Setup(c => c["CLEAN_PROD_VERSIONS"]).Returns("true");
        _configurationMock.Setup(c => c["KEEP_PROD_VERSIONS"]).Returns("2");

        var packages = new List<GiteaPackage>
        {
            new()
            {
                Id = 1, Name = "test", Version = "2025.1.1.1", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-365)
            },
            new()
            {
                Id = 2, Name = "test", Version = "2025.6.15.1", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-200)
            },
            new()
            {
                Id = 3, Name = "test", Version = "2026.1.1.1", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-45)
            },
            new() { Id = 4, Name = "test", Version = "2026.2.14.1", Type = "docker", CreatedAt = DateTime.UtcNow }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Should delete oldest 2 (2025.1.1 and 2025.6.15), keep newest 2
        Assert.Equal(2, result.Count);
        Assert.Contains(result, p => p.Id == 1);
        Assert.Contains(result, p => p.Id == 2);
        Assert.DoesNotContain(result, p => p.Id == 3 || p.Id == 4);
    }

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithMultipleProdVersions_ShouldKeepNewest()
    {
        // Arrange
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            new()
            {
                Id = 1, Name = "test", Version = "2025.1.1.1", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-365)
            },
            new()
            {
                Id = 2, Name = "test", Version = "2025.6.15.1", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-200)
            },
            new()
            {
                Id = 3, Name = "test", Version = "2026.1.1.1", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-45)
            },
            new() { Id = 4, Name = "test", Version = "2026.2.14.1", Type = "docker", CreatedAt = DateTime.UtcNow }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Default is CLEAN_PROD_VERSIONS=false, so nothing should be deleted
        Assert.Empty(result);
    }

    #endregion

    #region Prerelease Tests - Date Versioning

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithPrereleaseVersions_ShouldKeepLatest()
    {
        // Arrange - Default KEEP_PRERELEASE_VERSIONS=3
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            new()
            {
                Id = 1, Name = "test", Version = "2026.2.10.1-alpha", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-5)
            },
            new()
            {
                Id = 2, Name = "test", Version = "2026.2.11.1-beta", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-4)
            },
            new()
            {
                Id = 3, Name = "test", Version = "2026.2.12.1-rc", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-3)
            },
            new()
            {
                Id = 4, Name = "test", Version = "2026.2.13.1-preview", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-2)
            }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Should delete oldest 1 (alpha), keep newest 3
        Assert.Single(result);
        Assert.Contains(result, p => p.Id == 1); // alpha is oldest
        Assert.DoesNotContain(result, p => p.Id == 2 || p.Id == 3 || p.Id == 4);
    }

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithManyPrereleases_ShouldEnforceLimit()
    {
        // Arrange - Custom KEEP_PRERELEASE_VERSIONS=2
        SetupMocks();
        _configurationMock.Setup(c => c["KEEP_PRERELEASE_VERSIONS"]).Returns("2");

        var packages = new List<GiteaPackage>();
        for (int i = 0; i < 10; i++)
        {
            var date = DateTime.UtcNow.AddDays(-i);
            packages.Add(new GiteaPackage
            {
                Id = i,
                Name = "test",
                Version = $"{date.Year}.{date.Month}.{date.Day}.{i}-beta",
                Type = "docker",
                CreatedAt = date
            });
        }

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Should delete 8 oldest, keep only 2 newest (Id=0,1)
        Assert.Equal(8, result.Count);
        Assert.DoesNotContain(result, p => p.Id < 2);
        Assert.Contains(result, p => p.Id >= 2);
    }

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithMixedPrereleases_ShouldOrderByDate()
    {
        // Arrange
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            new()
            {
                Id = 1, Name = "test", Version = "2025.12.1.1-beta", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-60)
            },
            new()
            {
                Id = 2, Name = "test", Version = "2026.1.15.1-beta", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-30)
            },
            new()
            {
                Id = 3, Name = "test", Version = "2026.2.1.1-alpha", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-14)
            }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Default keep 3, so all should be kept
        Assert.Empty(result);
    }

    #endregion

    #region Dev Release Tests - Date Versioning

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithDevVersions_ShouldKeepLatest()
    {
        // Arrange - Default KEEP_DEV_VERSIONS=5
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            new()
            {
                Id = 1, Name = "test", Version = "2026.2.10.1-dev", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-5)
            },
            new()
            {
                Id = 2, Name = "test", Version = "2026.2.11.2-dev", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-4)
            },
            new()
            {
                Id = 3, Name = "test", Version = "2026.2.12.3-dev", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-3)
            }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Default keep 5, so all 3 should be kept
        Assert.Empty(result);
    }

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithManyDailyDevReleases_ShouldEnforceLimit()
    {
        // Arrange - Custom KEEP_DEV_VERSIONS=3
        SetupMocks();
        _configurationMock.Setup(c => c["KEEP_DEV_VERSIONS"]).Returns("3");

        var packages = new List<GiteaPackage>();
        for (int i = 0; i < 30; i++)
        {
            var date = DateTime.UtcNow.AddDays(-i);
            packages.Add(new GiteaPackage
            {
                Id = i,
                Name = "test",
                Version = $"{date.Year}.{date.Month}.{date.Day}.{i}-dev",
                Type = "docker",
                CreatedAt = date
            });
        }

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Should delete 27 oldest, keep only 3 newest (Id=0,1,2)
        Assert.Equal(27, result.Count);
        Assert.DoesNotContain(result, p => p.Id < 3);
        Assert.Contains(result, p => p.Id >= 3);
    }

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithManyDailyDevReleasesDefaultLimit_ShouldIdentifyAll()
    {
        // Arrange
        SetupMocks();
        var packages = new List<GiteaPackage>();
        for (int i = 0; i < 30; i++)
        {
            var date = DateTime.UtcNow.AddDays(-i);
            packages.Add(new GiteaPackage
            {
                Id = i,
                Name = "test",
                Version = $"{date.Year}.{date.Month}.{date.Day}.{i}-dev",
                Type = "docker",
                CreatedAt = date
            });
        }

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Default keep 5, so 25 should be deleted
        Assert.Equal(25, result.Count);
        Assert.DoesNotContain(result, p => p.Id < 5); // Keep newest 5 (Id 0-4)
        Assert.Contains(result, p => p.Id >= 5);
    }

    #endregion

    #region Mixed Release Types - Date Versioning

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithMixedReleaseTypes_ShouldSeparateAndCleanCorrectly()
    {
        // Arrange
        SetupMocks();
        _configurationMock.Setup(c => c["KEEP_PRERELEASE_VERSIONS"]).Returns("2");
        _configurationMock.Setup(c => c["KEEP_DEV_VERSIONS"]).Returns("2");

        var packages = new List<GiteaPackage>
        {
            // Prod releases (should not be deleted - CLEAN_PROD_VERSIONS=false)
            new()
            {
                Id = 1, Name = "test", Version = "2025.12.1.1", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-80)
            },
            new()
            {
                Id = 2, Name = "test", Version = "2026.1.1.1", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-45)
            },
            // Prerelease (keep 2 newest)
            new()
            {
                Id = 3, Name = "test", Version = "2026.1.25.1-alpha", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-20)
            },
            new()
            {
                Id = 4, Name = "test", Version = "2026.2.1.1-beta", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-14)
            },
            new()
            {
                Id = 5, Name = "test", Version = "2026.2.5.1-rc", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-10)
            },
            // Dev (keep 2 newest)
            new()
            {
                Id = 6, Name = "test", Version = "2026.2.10.1-dev", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-5)
            },
            new() { Id = 7, Name = "test", Version = "2026.2.14.1-dev", Type = "docker", CreatedAt = DateTime.UtcNow }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert
        Assert.Equal(1, result.Count); // Should delete 1 prerelease (alpha), 0 dev (keep both)
        Assert.DoesNotContain(result, p => p.Id <= 2); // Prod not deleted
        Assert.DoesNotContain(result, p => p.Id >= 6); // Keep 2 latest dev
    }

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithLargeSet_ShouldHandleCorrectly()
    {
        // Arrange
        SetupMocks();
        _configurationMock.Setup(c => c["CLEAN_PROD_VERSIONS"]).Returns("false");
        _configurationMock.Setup(c => c["KEEP_PRERELEASE_VERSIONS"]).Returns("3");
        _configurationMock.Setup(c => c["KEEP_DEV_VERSIONS"]).Returns("5");

        var packages = new List<GiteaPackage>();

        // Add prod releases
        for (int i = 0; i < 5; i++)
        {
            var date = DateTime.UtcNow.AddMonths(-(5 - i));
            packages.Add(new GiteaPackage
            {
                Id = i,
                Name = "test",
                Version = $"{date.Year}.{date.Month}.1.1",
                Type = "docker",
                CreatedAt = date
            });
        }

        // Add prerelease
        for (int i = 5; i < 15; i++)
        {
            var date = DateTime.UtcNow.AddDays(-(15 - i) * 7);
            packages.Add(new GiteaPackage
            {
                Id = i,
                Name = "test",
                Version = $"{date.Year}.{date.Month}.{date.Day}.1-beta",
                Type = "docker",
                CreatedAt = date
            });
        }

        // Add dev
        for (int i = 15; i < 30; i++)
        {
            var date = DateTime.UtcNow.AddDays(-(30 - i));
            packages.Add(new GiteaPackage
            {
                Id = i,
                Name = "test",
                Version = $"{date.Year}.{date.Month}.{date.Day}.{(30 - i)}-dev",
                Type = "docker",
                CreatedAt = date
            });
        }

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert
        Assert.NotNull(result);
        // Prod releases should never be deleted
        Assert.DoesNotContain(result, p => p.Id < 5);
        // Should delete 7 oldest prerelease (keep 3 newest)
        var prereleaseDeleted = result.Where(p => p.Id >= 5 && p.Id < 15).ToList();
        Assert.Equal(7, prereleaseDeleted.Count);
        // Should delete 10 oldest dev (keep 5 newest)
        var devDeleted = result.Where(p => p.Id >= 15).ToList();
        Assert.Equal(10, devDeleted.Count);
    }

    #endregion

    #region Edge Cases - Date Versioning

    [Theory]
    [InlineData("1000.1.1.1")] // Minimum valid year
    [InlineData("2999.12.31.999")] // Maximum valid year
    [InlineData("2025.2.14.0")] // Build number 0
    public void FilterPackagesToDeleteByDateVersion_WithBoundaryVersions_ShouldHandleCorrectly(string version)
    {
        // Arrange
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert
        Assert.NotNull(result);
    }

    [Theory]
    [InlineData("999.12.31.1")] // Year too small
    [InlineData("3000.1.1.1")] // Year too large
    [InlineData("2025.13.1.1")] // Month out of range
    [InlineData("2025.0.1.1")] // Month zero
    [InlineData("2025.2.32.1")] // Day out of range
    [InlineData("2025.2.0.1")] // Day zero
    public void FilterPackagesToDelete_WithInvalidDateVersions_ShouldNotProcess(string version)
    {
        // Arrange
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow },
            new() { Id = 2, Name = "test", Version = "1.0.0.1", Type = "docker", CreatedAt = DateTime.UtcNow }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert - Invalid date version should be skipped, only semantic version processed
        Assert.NotNull(result);
    }

    [Fact]
    public void FilterPackagesToDeleteByDateVersion_WithConsecutiveDates_ShouldOrderCorrectly()
    {
        // Arrange
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            new()
            {
                Id = 1, Name = "test", Version = "2025.2.10.1", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-5)
            },
            new()
            {
                Id = 2, Name = "test", Version = "2025.2.11.1", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-4)
            },
            new()
            {
                Id = 3, Name = "test", Version = "2025.2.12.1", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-3)
            },
            new()
            {
                Id = 4, Name = "test", Version = "2025.2.13.1", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-2)
            },
            new() { Id = 5, Name = "test", Version = "2025.2.14.1", Type = "docker", CreatedAt = DateTime.UtcNow }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert
        Assert.NotNull(result);
    }

    #endregion

    #region Mixed Versioning Variants

    [Fact]
    public void FilterPackagesToDelete_WithMixedVersioningVariants_ShouldProcessBothTypes()
    {
        // Arrange
        SetupMocks();
        var packages = new List<GiteaPackage>
        {
            // Semantic versioning
            new()
            {
                Id = 1, Name = "test", Version = "1.0.0", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-30)
            },
            new()
            {
                Id = 2, Name = "test", Version = "1.1.0-dev", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-10)
            },
            // Date versioning
            new()
            {
                Id = 3, Name = "test", Version = "2025.1.1.1", Type = "docker", CreatedAt = DateTime.UtcNow.AddDays(-45)
            },
            new()
            {
                Id = 4, Name = "test", Version = "2025.2.10.1-dev", Type = "docker",
                CreatedAt = DateTime.UtcNow.AddDays(-5)
            }
        };

        // Act
        var result = _packageService.FilterPackagesToDelete(packages);

        // Assert
        Assert.NotNull(result);
        // Prod releases should not be in delete list
        Assert.DoesNotContain(result, p => p.Id == 1 || p.Id == 3);
    }

    #endregion
}