using ScadaLink.CLI;

namespace ScadaLink.CLI.Tests;

public class CliConfigTests
{
    [Fact]
    public void Load_DefaultValues_WhenNoConfigExists()
    {
        // Clear environment variables that might affect the test
        var origContact = Environment.GetEnvironmentVariable("SCADALINK_CONTACT_POINTS");
        var origLdap = Environment.GetEnvironmentVariable("SCADALINK_LDAP_SERVER");
        var origFormat = Environment.GetEnvironmentVariable("SCADALINK_FORMAT");

        try
        {
            Environment.SetEnvironmentVariable("SCADALINK_CONTACT_POINTS", null);
            Environment.SetEnvironmentVariable("SCADALINK_LDAP_SERVER", null);
            Environment.SetEnvironmentVariable("SCADALINK_FORMAT", null);

            var config = CliConfig.Load();

            Assert.Equal(636, config.LdapPort);
            Assert.True(config.LdapUseTls);
            Assert.Equal("json", config.DefaultFormat);
        }
        finally
        {
            Environment.SetEnvironmentVariable("SCADALINK_CONTACT_POINTS", origContact);
            Environment.SetEnvironmentVariable("SCADALINK_LDAP_SERVER", origLdap);
            Environment.SetEnvironmentVariable("SCADALINK_FORMAT", origFormat);
        }
    }

    [Fact]
    public void Load_ContactPoints_FromEnvironment()
    {
        var orig = Environment.GetEnvironmentVariable("SCADALINK_CONTACT_POINTS");
        try
        {
            Environment.SetEnvironmentVariable("SCADALINK_CONTACT_POINTS", "host1:8080,host2:8080");

            var config = CliConfig.Load();

            Assert.Equal(2, config.ContactPoints.Count);
            Assert.Equal("host1:8080", config.ContactPoints[0]);
            Assert.Equal("host2:8080", config.ContactPoints[1]);
        }
        finally
        {
            Environment.SetEnvironmentVariable("SCADALINK_CONTACT_POINTS", orig);
        }
    }

    [Fact]
    public void Load_LdapServer_FromEnvironment()
    {
        var orig = Environment.GetEnvironmentVariable("SCADALINK_LDAP_SERVER");
        try
        {
            Environment.SetEnvironmentVariable("SCADALINK_LDAP_SERVER", "ldap.example.com");

            var config = CliConfig.Load();

            Assert.Equal("ldap.example.com", config.LdapServer);
        }
        finally
        {
            Environment.SetEnvironmentVariable("SCADALINK_LDAP_SERVER", orig);
        }
    }

    [Fact]
    public void Load_Format_FromEnvironment()
    {
        var orig = Environment.GetEnvironmentVariable("SCADALINK_FORMAT");
        try
        {
            Environment.SetEnvironmentVariable("SCADALINK_FORMAT", "table");

            var config = CliConfig.Load();

            Assert.Equal("table", config.DefaultFormat);
        }
        finally
        {
            Environment.SetEnvironmentVariable("SCADALINK_FORMAT", orig);
        }
    }
}