using FluentAssertions;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;
using StellaOps.Policy.Persistence.Postgres;
using StellaOps.Policy.Persistence.Postgres.Models;
using StellaOps.Policy.Persistence.Postgres.Repositories;
using Xunit;

using StellaOps.TestKit;
namespace StellaOps.Policy.Persistence.Tests;

[Collection(PolicyPostgresCollection.Name)]
public sealed class ExceptionRepositoryTests : IAsyncLifetime
{
    private readonly PolicyPostgresFixture _fixture;
    private readonly ExceptionRepository _repository;
    private readonly string _tenantId = Guid.NewGuid().ToString();

    public ExceptionRepositoryTests(PolicyPostgresFixture fixture)
    {
        _fixture = fixture;

        var options = fixture.Fixture.CreateOptions();
        options.SchemaName = fixture.SchemaName;
        var dataSource = new PolicyDataSource(Options.Create(options), NullLogger<PolicyDataSource>.Instance);
        _repository = new ExceptionRepository(dataSource, NullLogger<ExceptionRepository>.Instance);
    }

    public Task InitializeAsync() => _fixture.TruncateAllTablesAsync();
    public Task DisposeAsync() => Task.CompletedTask;

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task CreateAndGetById_RoundTripsException()
    {
        // Arrange
        var exception = new ExceptionEntity
        {
            Id = Guid.NewGuid(),
            TenantId = _tenantId,
            Name = "legacy-root-container",
            Description = "Allow root containers for legacy app",
            RulePattern = "no-root-containers",
            ProjectId = "project-legacy",
            Reason = "Legacy application requires root access",
            Status = ExceptionStatus.Active,
            ExpiresAt = DateTimeOffset.UtcNow.AddDays(30)
        };

        // Act
        await _repository.CreateAsync(exception);
        var fetched = await _repository.GetByIdAsync(_tenantId, exception.Id);

        // Assert
        fetched.Should().NotBeNull();
        fetched!.Id.Should().Be(exception.Id);
        fetched.Name.Should().Be("legacy-root-container");
        fetched.Status.Should().Be(ExceptionStatus.Active);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task GetByName_ReturnsCorrectException()
    {
        // Arrange
        var exception = CreateException("temp-waiver");
        await _repository.CreateAsync(exception);

        // Act
        var fetched = await _repository.GetByNameAsync(_tenantId, "temp-waiver");

        // Assert
        fetched.Should().NotBeNull();
        fetched!.Id.Should().Be(exception.Id);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task GetAll_ReturnsAllExceptionsForTenant()
    {
        // Arrange
        var exception1 = CreateException("exception1");
        var exception2 = CreateException("exception2");
        await _repository.CreateAsync(exception1);
        await _repository.CreateAsync(exception2);

        // Act
        var exceptions = await _repository.GetAllAsync(_tenantId);

        // Assert
        exceptions.Should().HaveCount(2);
        exceptions.Select(e => e.Name).Should().Contain(["exception1", "exception2"]);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task GetAll_FiltersByStatus()
    {
        // Arrange
        var activeException = CreateException("active");
        var revokedException = new ExceptionEntity
        {
            Id = Guid.NewGuid(),
            TenantId = _tenantId,
            Name = "revoked",
            Reason = "Test",
            Status = ExceptionStatus.Revoked
        };
        await _repository.CreateAsync(activeException);
        await _repository.CreateAsync(revokedException);

        // Act
        var activeExceptions = await _repository.GetAllAsync(_tenantId, status: ExceptionStatus.Active);

        // Assert
        activeExceptions.Should().HaveCount(1);
        activeExceptions[0].Name.Should().Be("active");
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task GetActiveForProject_ReturnsProjectExceptions()
    {
        // Arrange
        var projectException = new ExceptionEntity
        {
            Id = Guid.NewGuid(),
            TenantId = _tenantId,
            Name = "project-exception",
            ProjectId = "project-123",
            Reason = "Project-specific waiver",
            Status = ExceptionStatus.Active
        };
        var otherProjectException = new ExceptionEntity
        {
            Id = Guid.NewGuid(),
            TenantId = _tenantId,
            Name = "other-exception",
            ProjectId = "project-456",
            Reason = "Other project waiver",
            Status = ExceptionStatus.Active
        };
        await _repository.CreateAsync(projectException);
        await _repository.CreateAsync(otherProjectException);

        // Act
        var exceptions = await _repository.GetActiveForProjectAsync(_tenantId, "project-123");

        // Assert
        exceptions.Should().HaveCount(1);
        exceptions[0].Name.Should().Be("project-exception");
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task GetActiveForRule_ReturnsRuleExceptions()
    {
        // Arrange
        var ruleException = new ExceptionEntity
        {
            Id = Guid.NewGuid(),
            TenantId = _tenantId,
            Name = "rule-exception",
            RulePattern = "no-root-containers",
            Reason = "Rule-specific waiver",
            Status = ExceptionStatus.Active
        };
        await _repository.CreateAsync(ruleException);

        // Act
        var exceptions = await _repository.GetActiveForRuleAsync(_tenantId, "no-root-containers");

        // Assert
        exceptions.Should().HaveCount(1);
        exceptions[0].Name.Should().Be("rule-exception");
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task Update_ModifiesException()
    {
        // Arrange
        var exception = CreateException("update-test");
        await _repository.CreateAsync(exception);

        // Act
        var updated = new ExceptionEntity
        {
            Id = exception.Id,
            TenantId = _tenantId,
            Name = "update-test",
            Reason = "Updated reason",
            Description = "Updated description"
        };
        var result = await _repository.UpdateAsync(updated);
        var fetched = await _repository.GetByIdAsync(_tenantId, exception.Id);

        // Assert
        result.Should().BeTrue();
        fetched!.Reason.Should().Be("Updated reason");
        fetched.Description.Should().Be("Updated description");
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task Approve_SetsApprovalDetails()
    {
        // Arrange
        var exception = CreateException("approve-test");
        await _repository.CreateAsync(exception);

        // Act
        var result = await _repository.ApproveAsync(_tenantId, exception.Id, "admin@example.com");
        var fetched = await _repository.GetByIdAsync(_tenantId, exception.Id);

        // Assert
        result.Should().BeTrue();
        fetched!.ApprovedBy.Should().Be("admin@example.com");
        fetched.ApprovedAt.Should().NotBeNull();
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task Revoke_SetsRevokedStatusAndDetails()
    {
        // Arrange
        var exception = CreateException("revoke-test");
        await _repository.CreateAsync(exception);

        // Act
        var result = await _repository.RevokeAsync(_tenantId, exception.Id, "admin@example.com");
        var fetched = await _repository.GetByIdAsync(_tenantId, exception.Id);

        // Assert
        result.Should().BeTrue();
        fetched!.Status.Should().Be(ExceptionStatus.Revoked);
        fetched.RevokedBy.Should().Be("admin@example.com");
        fetched.RevokedAt.Should().NotBeNull();
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task Expire_ExpiresOldExceptions()
    {
        // Arrange - Create an exception that expires in the past
        var expiredException = new ExceptionEntity
        {
            Id = Guid.NewGuid(),
            TenantId = _tenantId,
            Name = "expired",
            Reason = "Test",
            Status = ExceptionStatus.Active,
            ExpiresAt = DateTimeOffset.UtcNow.AddDays(-1)
        };
        await _repository.CreateAsync(expiredException);

        // Act
        var count = await _repository.ExpireAsync(_tenantId);
        var fetched = await _repository.GetByIdAsync(_tenantId, expiredException.Id);

        // Assert
        count.Should().Be(1);
        fetched!.Status.Should().Be(ExceptionStatus.Expired);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public async Task Delete_RemovesException()
    {
        // Arrange
        var exception = CreateException("delete-test");
        await _repository.CreateAsync(exception);

        // Act
        var result = await _repository.DeleteAsync(_tenantId, exception.Id);
        var fetched = await _repository.GetByIdAsync(_tenantId, exception.Id);

        // Assert
        result.Should().BeTrue();
        fetched.Should().BeNull();
    }

    private ExceptionEntity CreateException(string name) => new()
    {
        Id = Guid.NewGuid(),
        TenantId = _tenantId,
        Name = name,
        Reason = "Test exception",
        Status = ExceptionStatus.Active
    };
}