using JdeScoping.DataAccess.Exceptions;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using NSubstitute;
using Shouldly;
using Xunit;

namespace JdeScoping.DataAccess.Tests;

/// <summary>
/// Unit tests for DbConnectionFactory GIW connection support.
/// </summary>
public class DbConnectionFactoryGiwTests
{
    private readonly IConfiguration _configuration;
    private readonly ILogger<DbConnectionFactory> _logger;

    public DbConnectionFactoryGiwTests()
    {
        _configuration = Substitute.For<IConfiguration>();
        _logger = Substitute.For<ILogger<DbConnectionFactory>>();
    }

    [Fact]
    public async Task CreateGiwConnectionAsync_MissingConnectionString_ThrowsConnectionException()
    {
        // Arrange
        _configuration.GetConnectionString("GIW").Returns((string?)null);
        var factory = new DbConnectionFactory(_configuration, _logger);

        // Act & Assert
        var ex = await Should.ThrowAsync<ConnectionException>(
            async () => await factory.CreateGiwConnectionAsync());

        ex.DataSource.ShouldBe("GIW");
        ex.Message.ShouldContain("Connection string not found");
    }

    [Fact]
    public async Task CreateGiwConnectionAsync_EmptyConnectionString_ThrowsConnectionException()
    {
        // Arrange
        _configuration.GetConnectionString("GIW").Returns(string.Empty);
        var factory = new DbConnectionFactory(_configuration, _logger);

        // Act & Assert
        var ex = await Should.ThrowAsync<ConnectionException>(
            async () => await factory.CreateGiwConnectionAsync());

        ex.DataSource.ShouldBe("GIW");
        ex.Message.ShouldContain("Connection string not found");
    }

    [Fact]
    public async Task CreateGiwConnectionAsync_InvalidConnectionString_ThrowsConnectionException()
    {
        // Arrange
        _configuration.GetConnectionString("GIW").Returns("Invalid oracle connection");
        var factory = new DbConnectionFactory(_configuration, _logger);

        // Act & Assert
        var ex = await Should.ThrowAsync<ConnectionException>(
            async () => await factory.CreateGiwConnectionAsync());

        ex.DataSource.ShouldBe("GIW");
        ex.Message.ShouldContain("Failed to open connection");
        ex.InnerException.ShouldNotBeNull();
    }

    [Fact]
    public async Task CreateGiwConnectionAsync_CancellationRequested_ThrowsOperationCanceledException()
    {
        // Arrange
        _configuration.GetConnectionString("GIW").Returns("User Id=test;Password=test;Data Source=test");
        var factory = new DbConnectionFactory(_configuration, _logger);
        using var cts = new CancellationTokenSource();
        cts.Cancel();

        // Act & Assert
        await Should.ThrowAsync<OperationCanceledException>(
            async () => await factory.CreateGiwConnectionAsync(cts.Token));
    }
}