using System;
using FrameworkBLL.Promotion;
using Microsoft.Extensions.Configuration;
using Xunit;

namespace FrameworkTests;

public class PromotionSystemContextTests
{
    private static IConfiguration ConfigWith(string? databaseName, string? databaseType = null)
    {
        var dict = new System.Collections.Generic.Dictionary<string, string?>();
        if (databaseName is not null) dict["Promotion:HomeDatabaseName"] = databaseName;
        if (databaseType is not null) dict["Promotion:HomeDatabaseType"] = databaseType;
        return new ConfigurationBuilder().AddInMemoryCollection(dict).Build();
    }

    [Fact]
    public void GetSystemLogin_ReturnsClientIdMinusOneAndConfiguredDatabase()
    {
        var ctx = new PromotionSystemContext(ConfigWith("GB5DEMO", "0"));
        var login = ctx.GetSystemLogin();

        Assert.Equal(-1, login.ClientId);
        Assert.Equal(-1, login.UserId);
        Assert.Equal("GB5DEMO", login.DatabaseName);
        Assert.Equal((byte)0, login.DatabaseType);
    }

    [Fact]
    public void Constructor_MissingHomeDatabaseName_Throws()
    {
        Assert.Throws<InvalidOperationException>(() => new PromotionSystemContext(ConfigWith(null)));
    }

    [Fact]
    public void GetSystemLogin_DatabaseTypeDefaultsToZeroWhenNotConfigured()
    {
        var ctx = new PromotionSystemContext(ConfigWith("GB5DEMO"));
        Assert.Equal((byte)0, ctx.GetSystemLogin().DatabaseType);
    }
}