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 PackageServiceVersionDetectionTests
{
    private readonly IPackageService _packageService;
    private readonly Mock<IConfiguration> _configurationMock;
    private readonly Mock<IGiteaPackageService> _giteaPackageServiceMock;

    public PackageServiceVersionDetectionTests()
    {
        _configurationMock = new Mock<IConfiguration>();
        _giteaPackageServiceMock = new Mock<IGiteaPackageService>();
        _packageService = new PackageService(_configurationMock.Object, _giteaPackageServiceMock.Object);
    }

    #region Release Type Detection Tests

    [Theory]
    [InlineData("1.0.0")]
    [InlineData("2.5.3")]
    [InlineData("10.20.30")]
    [InlineData("2025.2.14.1")]
    public void FilterPackagesToDelete_WithProdReleases_ShouldIdentifyAsNonDeletable(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Prod releases should not be in delete list (CLEAN_PROD_VERSIONS=false by default)
        Assert.DoesNotContain(result, p => p.Id == 1);
        Assert.Empty(result); // No packages should be deleted without CLEAN_PROD_VERSIONS=true
    }

    [Theory]
    [InlineData("1.0.0-alpha")]
    [InlineData("1.0.0-ALPHA")]
    [InlineData("2.5.3-alpha123")]
    [InlineData("1.0.0-beta")]
    [InlineData("1.0.0-BETA")]
    [InlineData("1.0.0-rc")]
    [InlineData("1.0.0-RC1")]
    [InlineData("1.0.0-preview")]
    [InlineData("1.0.0-PREVIEW")]
    public void FilterPackagesToDelete_WithPrereleaseVersions_ShouldIdentifyCorrectly(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Prerelease should be kept (default KEEP_PRERELEASE_VERSIONS=3, so 1 package is kept)
        Assert.NotNull(result);
        Assert.Empty(result); // Single prerelease should be kept as it's within the limit
    }

    [Theory]
    [InlineData("1.0.0-dev")]
    [InlineData("1.0.0-DEV")]
    [InlineData("2.5.3-dev123")]
    [InlineData("1.0.0-development")]
    [InlineData("1.0.0-DEV")]
    public void FilterPackagesToDelete_WithDevVersions_ShouldIdentifyCorrectly(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Dev version should be kept (default KEEP_DEV_VERSIONS=5, so 1 package is kept)
        Assert.NotNull(result);
        Assert.Empty(result); // Single dev version should be kept as it's within the limit
    }

    #endregion

    #region Semantic Version Detection Tests

    [Theory]
    [InlineData("1.0")]
    [InlineData("1.0.0")]
    [InlineData("1.0.0.0")]
    [InlineData("2.5")]
    [InlineData("2.5.3")]
    [InlineData("2.5.3.100")]
    [InlineData("0.0.0.0")]
    [InlineData("99.99.99.99")]
    public void FilterPackagesToDelete_WithValidSemanticVersions_ShouldProcess(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Should process without throwing and not delete prod releases
        Assert.NotNull(result);
        Assert.DoesNotContain(result, p => p.Id == 1); // Prod version should not be deleted
    }

    [Theory]
    [InlineData("1")]           // Only 1 component
    [InlineData("1.0.0.0.0")]   // 5 components
    [InlineData("1.a.0.0")]     // Non-numeric
    [InlineData("a.b.c.d")]     // All non-numeric
    public void FilterPackagesToDelete_WithInvalidSemanticVersions_ShouldSkip(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow },
            new() { Id = 2, Name = "test", Version = "2.0.0.0", Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Invalid version should be skipped, only valid semantic version (id=2) is processed
        Assert.NotNull(result);
        // Should not crash and should only consider the valid version
        Assert.DoesNotContain(result, p => p.Id == 2); // Valid prod should not be deleted
    }

    [Theory]
    [InlineData("101.0.0.0")]
    [InlineData("200.5.3.100")]
    [InlineData("1000.0.0.0")]
    public void FilterPackagesToDelete_WithLargeMajorVersion_ShouldTreatAsDateVersion(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Large major versions (>100) are detected as date versions, not semantic
        // These will fail date validation (invalid month/day) and be skipped
        Assert.NotNull(result);
    }

    #endregion

    #region Date Version Detection Tests

    [Theory]
    [InlineData("2024.1.1.1")]
    [InlineData("2025.2.14.1")]
    [InlineData("2026.12.31.999")]
    [InlineData("2000.6.15.100")]
    [InlineData("1999.1.1.1")]
    public void FilterPackagesToDelete_WithValidDateVersions_ShouldProcess(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Should process without throwing and not delete prod date versions
        Assert.NotNull(result);
        Assert.DoesNotContain(result, p => p.Id == 1); // Prod date version should not be deleted
    }

    [Theory]
    [InlineData("2025.1.1")]           // 3 components (missing build)
    [InlineData("2025.1.1.1.1")]       // 5 components
    [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
    [InlineData("999.2.14.1")]         // Year too small
    [InlineData("3000.2.14.1")]        // Year too large
    [InlineData("2025.a.14.1")]        // Non-numeric month
    public void FilterPackagesToDelete_WithInvalidDateVersions_ShouldSkip(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow },
            new() { Id = 2, Name = "test", Version = "1.0.0.0", Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Invalid date version should be skipped, valid semantic version (id=2) is processed as prod
        Assert.NotNull(result);
        Assert.DoesNotContain(result, p => p.Id == 2); // Valid semantic prod should not be deleted
    }

    [Theory]
    [InlineData("1000.1.1.1")]   // Minimum valid year
    [InlineData("2999.12.31.999")] // Maximum valid year
    [InlineData("2025.1.1.1")]   // January 1
    [InlineData("2025.12.31.1")] // December 31
    public void FilterPackagesToDelete_WithDateVersionBoundaries_ShouldProcess(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Boundary date versions should be recognized as valid
        Assert.NotNull(result);
        Assert.DoesNotContain(result, p => p.Id == 1); // Prod date version should not be deleted
    }

    #endregion

    #region Case Sensitivity Tests

    [Theory]
    [InlineData("1.0.0-alpha")]
    [InlineData("1.0.0-ALPHA")]
    [InlineData("1.0.0-Alpha")]
    [InlineData("1.0.0-AlPhA")]
    public void FilterPackagesToDelete_WithDifferentCasePrerelease_ShouldHandleCorrectly(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - All case variations should be recognized as prerelease
        Assert.NotNull(result);
        Assert.Empty(result); // Single prerelease should be kept
    }

    [Theory]
    [InlineData("1.0.0-dev")]
    [InlineData("1.0.0-DEV")]
    [InlineData("1.0.0-Dev")]
    [InlineData("1.0.0-DeV")]
    public void FilterPackagesToDelete_WithDifferentCaseDev_ShouldHandleCorrectly(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - All case variations should be recognized as dev version
        Assert.NotNull(result);
        Assert.Empty(result); // Single dev version should be kept
    }

    #endregion

    #region Suffix/Identifier Tests

    [Theory]
    [InlineData("1.0.0-alpha1")]
    [InlineData("1.0.0-alpha.1")]
    [InlineData("1.0.0-beta2")]
    [InlineData("1.0.0-rc.1")]
    [InlineData("2025.2.14.1-dev.1")]
    [InlineData("2025.2.14.1-dev123")]
    public void FilterPackagesToDelete_WithCompoundSuffixes_ShouldIdentifyCorrectly(string version)
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = version, Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Compound suffixes should be recognized and not cause errors
        Assert.NotNull(result);
        Assert.Empty(result); // Single prerelease/dev should be kept
    }

    #endregion

    #region Empty and Null Tests

    [Fact]
    public void FilterPackagesToDelete_WithEmptyList_ShouldReturnEmpty()
    {
        // Arrange
        var packages = new List<GiteaPackage>();

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

        // Assert - Empty input should return empty result
        Assert.NotNull(result);
        Assert.Empty(result);
    }

    [Fact]
    public void FilterPackagesToDelete_WithNullableInputs_ShouldHandleGracefully()
    {
        // Arrange
        var packages = new List<GiteaPackage>
        {
            new() { Id = 1, Name = "test", Version = "1.0.0", Type = "docker", CreatedAt = DateTime.UtcNow }
        };

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

        // Assert - Should handle without throwing and not delete prod
        Assert.NotNull(result);
        Assert.Empty(result); // Prod should not be deleted
    }

    #endregion
}