using System.Text.Json;
using StellaOps.Policy.RiskProfile.Validation;
using Xunit;

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

public class RiskProfileValidatorTests
{
    private readonly RiskProfileValidator _validator = new();

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public void Valid_profile_passes_schema()
    {
        var profile = """
        {
          "id": "default-risk",
          "version": "1.0.0",
          "description": "Baseline risk profile",
          "signals": [
            { "name": "reachability", "source": "signals", "type": "boolean", "path": "/reachability/exploitable" },
            { "name": "kev", "source": "cisa", "type": "boolean" }
          ],
          "weights": {
            "reachability": 0.6,
            "kev": 0.4
          },
          "overrides": {
            "severity": [
              { "when": { "kev": true }, "set": "critical" }
            ],
            "decisions": [
              { "when": { "reachability": false }, "action": "review", "reason": "Not reachable" }
            ]
          },
          "metadata": {
            "owner": "risk-team"
          }
        }
        """;

        var result = _validator.Validate(profile);

        Assert.True(result.IsValid, string.Join(" | ", result.Errors ?? Array.Empty<string>()));
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public void Missing_required_fields_fails_schema()
    {
        var invalidProfile = """
        { "id": "missing-fields" }
        """;

        var result = _validator.Validate(invalidProfile);

        Assert.False(result.IsValid);
        Assert.NotEmpty(result.Errors);
    }

    [Trait("Category", TestCategories.Unit)]
        [Fact]
    public void Empty_payload_throws()
    {
        Assert.Throws<ArgumentException>(() => _validator.Validate("  "));
    }
}