using System.Text.Json;
using XafPet.Desktop.PetEngine;
using Xunit;

namespace XafPet.Desktop.Tests;

public class PetConfigTests
{
    private const string ValidJson = """
    {
      "version": "1.0",
      "type": "animal",
      "species": "cockatiel",
      "gender": "female",
      "image_base_url": "./DefaultPets/xibao/",
      "default_image": "standing.png",
      "actions": {
        "idle": "wings_idle",
        "happy": "wings_spread",
        "custom_state_1": "user_animation_1"
      },
      "parameters": {
        "move_distance": 15,
        "animation_speed": 1.0,
        "interaction_timeout": 300
      }
    }
    """;

    [Fact]
    public void Parse_ValidJson_LoadsAllFields()
    {
        var config = PetConfig.Parse(ValidJson);

        Assert.Equal("1.0", config.Version);
        Assert.Equal(PetType.Animal, config.Type);
        Assert.Equal("cockatiel", config.Species);
        Assert.Equal("female", config.Gender);
        Assert.Equal("./DefaultPets/xibao/", config.ImageBaseUrl);
        Assert.Equal("standing.png", config.DefaultImage);
        Assert.Equal("wings_idle", config.Actions["idle"]);
        Assert.Equal(15, config.Parameters.MoveDistance);
    }

    [Fact]
    public void Parse_MissingActionsKey_UsesDefaults()
    {
        var json = """{ "version": "1.0", "type": "human", "image_base_url": "./pets/", "default_image": "a.png" }""";
        var config = PetConfig.Parse(json);

        Assert.Equal("idle", config.Actions["idle"]);
    }

    [Fact]
    public void Parse_InvalidJson_ThrowsJsonException()
    {
        Assert.Throws<JsonException>(() => PetConfig.Parse("{ not valid json"));
    }

    [Fact]
    public void Parse_CustomStates_CountedCorrectly()
    {
        var config = PetConfig.Parse(ValidJson);

        Assert.Equal(1, config.CustomStateCount);
        Assert.Equal("user_animation_1", config.GetActionForState("custom_state_1"));
    }
}