namespace StellaOps.Remediation.WebService.Tests;

[CollectionDefinition(Name, DisableParallelization = true)]
public sealed class RemediationEnvironmentCollection
{
    public const string Name = "RemediationEnvironment";
}

internal sealed class RemediationEnvironmentScope : IDisposable
{
    private static readonly string[] ManagedKeys =
    [
        "DOTNET_ENVIRONMENT",
        "ASPNETCORE_ENVIRONMENT",
        "REMEDIATION__STORAGE__DRIVER",
        "REMEDIATION__STORAGE__POSTGRES__CONNECTIONSTRING",
        "CONNECTIONSTRINGS__DEFAULT"
    ];

    private readonly Dictionary<string, string?> _originalValues = new(StringComparer.Ordinal);

    private RemediationEnvironmentScope()
    {
        foreach (var key in ManagedKeys)
        {
            _originalValues[key] = Environment.GetEnvironmentVariable(key);
        }
    }

    public static RemediationEnvironmentScope InMemoryTestingProfile()
    {
        var scope = new RemediationEnvironmentScope();
        scope.Set("DOTNET_ENVIRONMENT", "Testing");
        scope.Set("ASPNETCORE_ENVIRONMENT", "Testing");
        scope.Set("REMEDIATION__STORAGE__DRIVER", "inmemory");
        scope.Set("REMEDIATION__STORAGE__POSTGRES__CONNECTIONSTRING", null);
        scope.Set("CONNECTIONSTRINGS__DEFAULT", null);
        return scope;
    }

    public static RemediationEnvironmentScope PostgresWithoutConnection(string environmentName)
    {
        var scope = new RemediationEnvironmentScope();
        scope.Set("DOTNET_ENVIRONMENT", environmentName);
        scope.Set("ASPNETCORE_ENVIRONMENT", environmentName);
        scope.Set("REMEDIATION__STORAGE__DRIVER", "postgres");
        scope.Set("REMEDIATION__STORAGE__POSTGRES__CONNECTIONSTRING", null);
        scope.Set("CONNECTIONSTRINGS__DEFAULT", null);
        return scope;
    }

    public static RemediationEnvironmentScope InMemoryDriver(string environmentName)
    {
        var scope = new RemediationEnvironmentScope();
        scope.Set("DOTNET_ENVIRONMENT", environmentName);
        scope.Set("ASPNETCORE_ENVIRONMENT", environmentName);
        scope.Set("REMEDIATION__STORAGE__DRIVER", "inmemory");
        scope.Set("REMEDIATION__STORAGE__POSTGRES__CONNECTIONSTRING", null);
        scope.Set("CONNECTIONSTRINGS__DEFAULT", null);
        return scope;
    }

    public static RemediationEnvironmentScope PostgresWithConnection(
        string environmentName,
        string connectionString)
    {
        var scope = new RemediationEnvironmentScope();
        scope.Set("DOTNET_ENVIRONMENT", environmentName);
        scope.Set("ASPNETCORE_ENVIRONMENT", environmentName);
        scope.Set("REMEDIATION__STORAGE__DRIVER", "postgres");
        scope.Set("REMEDIATION__STORAGE__POSTGRES__CONNECTIONSTRING", connectionString);
        scope.Set("CONNECTIONSTRINGS__DEFAULT", connectionString);
        return scope;
    }

    public void Dispose()
    {
        foreach (var entry in _originalValues)
        {
            Environment.SetEnvironmentVariable(entry.Key, entry.Value);
        }
    }

    private void Set(string key, string? value)
    {
        Environment.SetEnvironmentVariable(key, value);
    }
}