using System.Text.Json;
using System.Text.Json.Serialization;

namespace XafPet.Desktop.PetEngine;

[JsonConverter(typeof(JsonStringEnumConverter))]
public enum PetType { Animal, Human, Custom }

/// <summary>宠物形象配置（pet-config.json）</summary>
public sealed class PetConfig
{
    [JsonPropertyName("version")]
    public string Version { get; set; } = "1.0";

    [JsonPropertyName("type")]
    public PetType Type { get; set; } = PetType.Custom;

    [JsonPropertyName("species")]
    public string Species { get; set; } = "other";

    [JsonPropertyName("gender")]
    public string Gender { get; set; } = "neutral";

    [JsonPropertyName("image_base_url")]
    public string ImageBaseUrl { get; set; } = "";

    [JsonPropertyName("default_image")]
    public string DefaultImage { get; set; } = "standing.png";

    [JsonPropertyName("actions")]
    public Dictionary<string, string> Actions { get; set; } = new();

    [JsonPropertyName("sounds")]
    public Dictionary<string, string> Sounds { get; set; } = new();

    [JsonPropertyName("parameters")]
    public PetParameters Parameters { get; set; } = new();

    [JsonIgnore]
    public int CustomStateCount => Actions.Keys.Count(k => k.StartsWith("custom_state_"));

    /// <summary>解析 JSON 字符串；缺省 actions 时补默认映射（key=value）</summary>
    public static PetConfig Parse(string json)
    {
        var config = JsonSerializer.Deserialize<PetConfig>(json)
            ?? throw new JsonException("pet-config.json 反序列化结果为 null");
        if (config.Actions.Count == 0)
        {
            config.Actions = new Dictionary<string, string>
            {
                ["idle"] = "idle",
                ["happy"] = "happy",
                ["busy"] = "busy",
                ["sleeping"] = "sleeping"
            };
        }
        return config;
    }

    public string GetActionForState(string stateName)
        => Actions.TryGetValue(stateName, out var v) ? v : stateName;
}

public sealed class PetParameters
{
    [JsonPropertyName("move_distance")]
    public int MoveDistance { get; set; } = 15;

    [JsonPropertyName("animation_speed")]
    public double AnimationSpeed { get; set; } = 1.0;

    [JsonPropertyName("interaction_timeout")]
    public int InteractionTimeout { get; set; } = 300; // 秒
}