using Evergreen.Health.Application.Health.Entities;
using Evergreen.Health.Application.Health.Integrations.HomeAssistant;
using Evergreen.Health.Application.Health.Models;
using Furion.DatabaseAccessor;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Options;
using SqlSugar;
using System.Security.Claims;
using System.Text.Json;

namespace Evergreen.Health.Application.Health.Services;

[ApiDescriptionSettings("健康管理", Name = "HealthHomeAssistant", Order = 51)]
public sealed class HealthHomeAssistantService : IDynamicApiController, ITransient
{
    private const string HealthUserIdClaim = "health_user_id";
    private readonly HomeAssistantClient _homeAssistant;
    private readonly HomeAssistantRegistryService _registryService;
    private readonly HomeAssistantOptions _options;
    private readonly SqlSugarRepository<HealthSceneExecution> _executionRepository;
    private readonly IHttpContextAccessor _httpContextAccessor;

    public HealthHomeAssistantService(
        HomeAssistantClient homeAssistant,
        HomeAssistantRegistryService registryService,
        IOptions<HomeAssistantOptions> options,
        SqlSugarRepository<HealthSceneExecution> executionRepository,
        IHttpContextAccessor httpContextAccessor)
    {
        _homeAssistant = homeAssistant;
        _registryService = registryService;
        _options = options.Value;
        _executionRepository = executionRepository;
        _httpContextAccessor = httpContextAccessor;
    }

    [Authorize]
    [HttpGet("/api/health/home-assistant/status")]
    public async Task<HomeAssistantStatusOutput> GetStatus(CancellationToken cancellationToken)
    {
        try
        {
            var states = await _homeAssistant.GetStatesAsync(cancellationToken);
            var stateMap = states.ToDictionary(item => item.EntityId, StringComparer.OrdinalIgnoreCase);
            var registries = await _registryService.GetRegistriesAsync(cancellationToken);

            var discoveredDevices = BuildDiscoveredDevices(registries, stateMap);
            var summary = BuildSummary(discoveredDevices, states);
            var sceneDevices = BuildSceneDevicesSummary(stateMap);
            var environment = BuildEnvironmentOutput(stateMap, discoveredDevices);

            return new HomeAssistantStatusOutput
            {
                Connected = true,
                Message = "Home Assistant 已连接",
                CheckedAt = DateTimeOffset.Now,
                Summary = summary,
                Devices = discoveredDevices,
                SceneDevices = sceneDevices,
                Environment = environment
            };
        }
        catch (Exception exception)
        {
            return new HomeAssistantStatusOutput
            {
                Connected = false,
                Message = $"Home Assistant 连接失败：{exception.Message}",
                CheckedAt = DateTimeOffset.Now,
                Summary = new HomeAssistantSummaryOutput(),
                Devices = [],
                SceneDevices = new HomeAssistantSceneDevicesSummaryOutput { Total = 4, Available = 0 },
                Environment = new HomeAssistantEnvironmentOutput()
            };
        }
    }

    [Authorize]
    [HttpPost("/api/health/home-assistant/scenes/sleep")]
    public Task<HomeAssistantSceneOutput> ExecuteSleepScene(CancellationToken cancellationToken)
        => ExecuteScene("sleep", "舒睡模式", ExecuteSleepActions, cancellationToken);

    [Authorize]
    [HttpPost("/api/health/home-assistant/scenes/all-off")]
    public Task<HomeAssistantSceneOutput> ExecuteAllOffScene(CancellationToken cancellationToken)
        => ExecuteScene("all-off", "一键关闭", ExecuteAllOffActions, cancellationToken);

    private async Task<HomeAssistantSceneOutput> ExecuteScene(
        string sceneCode,
        string sceneName,
        Func<IReadOnlyDictionary<string, HomeAssistantState>, List<HomeAssistantActionResult>, CancellationToken, Task> executor,
        CancellationToken cancellationToken)
    {
        var userId = GetCurrentUserId();
        var actions = new List<HomeAssistantActionResult>();
        string status;
        string message;

        try
        {
            var states = await _homeAssistant.GetStatesAsync(cancellationToken);
            var stateMap = states.ToDictionary(item => item.EntityId, StringComparer.OrdinalIgnoreCase);
            await executor(stateMap, actions, cancellationToken);

            var successCount = actions.Count(item => item.Status == "Succeeded");
            var failedCount = actions.Count(item => item.Status == "Failed");
            var skippedCount = actions.Count(item => item.Status == "Skipped");
            status = failedCount == 0 && successCount > 0 ? "Succeeded" : successCount > 0 ? "Partial" : "Failed";
            message = status switch
            {
                "Succeeded" when skippedCount > 0 => $"场景已执行，{successCount} 项成功，{skippedCount} 项因设备离线或未配置而跳过",
                "Succeeded" => $"场景已执行，{successCount} 项成功",
                "Partial" => $"场景部分执行成功：{successCount} 项成功，{failedCount} 项失败，{skippedCount} 项跳过",
                _ => "当前没有可执行的在线设备"
            };
        }
        catch (Exception exception)
        {
            status = "Failed";
            message = $"场景执行失败：{exception.Message}";
        }

        await _executionRepository.InsertAsync(new HealthSceneExecution
        {
            UserId = userId,
            SceneCode = sceneCode,
            SceneName = sceneName,
            Status = status,
            Detail = JsonSerializer.Serialize(new { message, actions })
        });

        return new HomeAssistantSceneOutput
        {
            SceneCode = sceneCode,
            SceneName = sceneName,
            Success = status is "Succeeded" or "Partial",
            Status = status,
            Message = message,
            Actions = actions.Select(item => new HomeAssistantSceneActionOutput
            {
                Name = item.Name,
                EntityId = item.EntityId,
                Status = item.Status,
                Message = item.Message
            }).ToList()
        };
    }

    private async Task ExecuteSleepActions(
        IReadOnlyDictionary<string, HomeAssistantState> states,
        List<HomeAssistantActionResult> results,
        CancellationToken cancellationToken)
    {
        var entities = _options.Entities;
        var scene = _options.SleepScene;

        await RunAction(states, results, "开启除湿机", entities.Dehumidifier, "humidifier", "turn_on", null, cancellationToken);
        await RunAction(states, results, "设置目标湿度", entities.Dehumidifier, "humidifier", "set_humidity",
            new Dictionary<string, object?> { ["humidity"] = scene.TargetHumidity }, cancellationToken);
        await RunAction(states, results, "切换睡眠模式", entities.Dehumidifier, "humidifier", "set_mode",
            new Dictionary<string, object?> { ["mode"] = scene.DehumidifierMode }, cancellationToken);
        await RunAction(states, results, "设置低档风速", entities.DehumidifierFanLevel, "select", "select_option",
            new Dictionary<string, object?> { ["option"] = scene.FanLevel }, cancellationToken);
        await RunAction(states, results, scene.EnableUv ? "开启 UV 杀菌" : "关闭 UV 杀菌", entities.DehumidifierUv,
            "switch", scene.EnableUv ? "turn_on" : "turn_off", null, cancellationToken);

        if (scene.EnableFragrance)
        {
            await RunAction(states, results, "开启香氛机", entities.FragranceSwitch, "switch", "turn_on", null, cancellationToken);
            await RunAction(states, results, "开启香氛灯", entities.FragranceLight, "light", "turn_on",
                new Dictionary<string, object?> { ["brightness_pct"] = scene.LightBrightnessPercent }, cancellationToken);
        }

        await RunAction(states, results, "开启助眠灯光", entities.AmbientLight, "light", "turn_on",
            new Dictionary<string, object?>
            {
                ["brightness_pct"] = scene.LightBrightnessPercent,
                ["color_temp_kelvin"] = scene.LightColorTemperatureKelvin
            }, cancellationToken);

        if (scene.EnableSpeakerSleepMode)
            await RunAction(states, results, "开启音箱睡眠模式", entities.SpeakerSleepMode, "switch", "turn_on", null, cancellationToken);
    }

    private async Task ExecuteAllOffActions(
        IReadOnlyDictionary<string, HomeAssistantState> states,
        List<HomeAssistantActionResult> results,
        CancellationToken cancellationToken)
    {
        var entities = _options.Entities;
        await RunAction(states, results, "关闭除湿机", entities.Dehumidifier, "humidifier", "turn_off", null, cancellationToken);
        await RunAction(states, results, "关闭香氛机", entities.FragranceSwitch, "switch", "turn_off", null, cancellationToken);
        await RunAction(states, results, "关闭香氛灯", entities.FragranceLight, "light", "turn_off", null, cancellationToken);
        await RunAction(states, results, "关闭助眠灯光", entities.AmbientLight, "light", "turn_off", null, cancellationToken);
        await RunAction(states, results, "关闭音箱睡眠模式", entities.SpeakerSleepMode, "switch", "turn_off", null, cancellationToken);
    }

    private async Task RunAction(
        IReadOnlyDictionary<string, HomeAssistantState> states,
        List<HomeAssistantActionResult> results,
        string name,
        string entityId,
        string domain,
        string service,
        IReadOnlyDictionary<string, object?>? extraData,
        CancellationToken cancellationToken)
    {
        if (string.IsNullOrWhiteSpace(entityId) || !states.TryGetValue(entityId, out var state))
        {
            results.Add(new HomeAssistantActionResult { Name = name, EntityId = entityId, Status = "Skipped", Message = "实体未配置或不存在" });
            return;
        }

        if (!IsAvailable(state))
        {
            results.Add(new HomeAssistantActionResult { Name = name, EntityId = entityId, Status = "Skipped", Message = "设备当前离线" });
            return;
        }

        var data = new Dictionary<string, object?> { ["entity_id"] = entityId };
        if (extraData is not null)
        {
            foreach (var item in extraData) data[item.Key] = item.Value;
        }

        try
        {
            await _homeAssistant.CallServiceAsync(domain, service, data, cancellationToken);
            results.Add(new HomeAssistantActionResult { Name = name, EntityId = entityId, Status = "Succeeded", Message = "执行成功" });
        }
        catch (Exception exception)
        {
            results.Add(new HomeAssistantActionResult { Name = name, EntityId = entityId, Status = "Failed", Message = exception.Message });
        }
    }

    private long GetCurrentUserId()
    {
        var value = _httpContextAccessor.HttpContext?.User.FindFirstValue(HealthUserIdClaim);
        if (!long.TryParse(value, out var userId))
            throw new UnauthorizedAccessException("登录状态已失效");
        return userId;
    }

    private List<HomeAssistantDiscoveredDeviceOutput> BuildDiscoveredDevices(
        HomeAssistantRegistries? registries,
        IReadOnlyDictionary<string, HomeAssistantState> stateMap)
    {
        var discovered = new List<HomeAssistantDiscoveredDeviceOutput>();

        if (registries is not null && registries.Devices.Count > 0)
        {
            var areaMap = registries.Areas.ToDictionary(a => a.AreaId, a => a.Name, StringComparer.OrdinalIgnoreCase);
            var entitiesByDevice = registries.Entities
                .Where(e => !string.IsNullOrWhiteSpace(e.DeviceId))
                .GroupBy(e => e.DeviceId!, StringComparer.OrdinalIgnoreCase)
                .ToDictionary(g => g.Key, g => g.ToList(), StringComparer.OrdinalIgnoreCase);

            foreach (var device in registries.Devices)
            {
                var regEntities = entitiesByDevice.GetValueOrDefault(device.Id) ?? [];
                var isXiaomi = (device.Manufacturer?.Contains("Xiaomi", StringComparison.OrdinalIgnoreCase) == true)
                               || (device.Model?.Contains("xiaomi", StringComparison.OrdinalIgnoreCase) == true)
                               || regEntities.Any(e => string.Equals(e.Platform, "xiaomi_home", StringComparison.OrdinalIgnoreCase));

                if (!isXiaomi && regEntities.Count == 0)
                {
                    continue;
                }

                var entityOutputs = new List<HomeAssistantEntityOutput>();
                foreach (var regEntity in regEntities)
                {
                    stateMap.TryGetValue(regEntity.EntityId, out var state);
                    var available = state is not null && IsAvailable(state);
                    var domain = regEntity.EntityId.Contains('.') ? regEntity.EntityId.Split('.')[0] : "";
                    var name = !string.IsNullOrWhiteSpace(regEntity.Name)
                        ? regEntity.Name
                        : (!string.IsNullOrWhiteSpace(regEntity.OriginalName) ? regEntity.OriginalName : regEntity.EntityId);

                    entityOutputs.Add(new HomeAssistantEntityOutput
                    {
                        EntityId = regEntity.EntityId,
                        Domain = domain,
                        Name = name,
                        State = state?.State ?? "unavailable",
                        Available = available,
                        Unit = state?.GetStringAttribute("unit_of_measurement"),
                        Attributes = ExtractSafeAttributes(state)
                    });
                }

                var isOnline = regEntities.Any(e =>
                {
                    if (!string.IsNullOrWhiteSpace(e.DisabledBy)) return false;
                    return stateMap.TryGetValue(e.EntityId, out var s) && IsAvailable(s);
                });

                var displayName = !string.IsNullOrWhiteSpace(device.NameByUser)
                    ? device.NameByUser
                    : (!string.IsNullOrWhiteSpace(device.Name) ? device.Name : "小米智能设备");

                var areaName = !string.IsNullOrWhiteSpace(device.AreaId) && areaMap.TryGetValue(device.AreaId, out var an)
                    ? an
                    : "睡眠空间";

                var category = CategorizeDevice(displayName, device.Model ?? "", device.Manufacturer ?? "", entityOutputs);
                var metrics = ExtractDeviceMetrics(category, entityOutputs);

                discovered.Add(new HomeAssistantDiscoveredDeviceOutput
                {
                    DeviceId = device.Id,
                    Name = displayName,
                    Manufacturer = device.Manufacturer ?? "Xiaomi",
                    Model = device.Model ?? "",
                    AreaName = areaName,
                    Category = category,
                    Online = isOnline,
                    Entities = entityOutputs,
                    Metrics = metrics
                });
            }
        }

        if (discovered.Count == 0)
        {
            discovered = BuildFallbackDevices(stateMap);
        }

        return discovered;
    }

    private List<HomeAssistantDiscoveredDeviceOutput> BuildFallbackDevices(IReadOnlyDictionary<string, HomeAssistantState> stateMap)
    {
        var entities = _options.Entities;
        var list = new List<HomeAssistantDiscoveredDeviceOutput>();

        void AddFallback(string id, string name, string model, string category, string area, params string[] entityIds)
        {
            var entityOutputs = new List<HomeAssistantEntityOutput>();
            foreach (var eid in entityIds.Where(s => !string.IsNullOrWhiteSpace(s)))
            {
                stateMap.TryGetValue(eid, out var state);
                var available = state is not null && IsAvailable(state);
                var domain = eid.Contains('.') ? eid.Split('.')[0] : "";
                entityOutputs.Add(new HomeAssistantEntityOutput
                {
                    EntityId = eid,
                    Domain = domain,
                    Name = name,
                    State = state?.State ?? "unavailable",
                    Available = available,
                    Unit = state?.GetStringAttribute("unit_of_measurement"),
                    Attributes = ExtractSafeAttributes(state)
                });
            }

            var online = entityOutputs.Any(e => e.Available);
            var metrics = ExtractDeviceMetrics(category, entityOutputs);

            list.Add(new HomeAssistantDiscoveredDeviceOutput
            {
                DeviceId = id,
                Name = name,
                Manufacturer = "Xiaomi",
                Model = model,
                AreaName = area,
                Category = category,
                Online = online,
                Entities = entityOutputs,
                Metrics = metrics
            });
        }

        AddFallback("fallback_dehumidifier", "米家变频净化除湿机 Max", "xiaomi.derh.60l", nameof(HealthDeviceCategory.EnvironmentControl), "睡眠空间",
            entities.Dehumidifier, entities.DehumidifierFanLevel, entities.DehumidifierUv);
        AddFallback("fallback_fragrance", "米家智能香氛机", "xiaomi.diffuser.xw002", nameof(HealthDeviceCategory.Fragrance), "睡眠空间",
            entities.FragranceSwitch, entities.FragranceLight);
        AddFallback("fallback_ambient_light", "米家夜灯/氛围灯", "lemesh.light.wy0d02", nameof(HealthDeviceCategory.Lighting), "睡眠空间",
            entities.AmbientLight);
        AddFallback("fallback_speaker", "Xiaomi Sound Pro 智能音箱", "xiaomi.wifispeaker.l17a", nameof(HealthDeviceCategory.Media), "睡眠空间",
            entities.Speaker, entities.SpeakerSleepMode);
        AddFallback("fallback_air_monitor", "米家空气检测仪", "mirsz.airm.et71", nameof(HealthDeviceCategory.EnvironmentSensor), "环境监测",
            entities.Temperature, entities.Humidity, entities.Pm25, entities.Co2, entities.Formaldehyde, entities.Tvoc);
        AddFallback("fallback_mattress", "8H 智能调温睡眠床垫", "8h.mattress.v1", nameof(HealthDeviceCategory.Sleep), "睡眠空间");
        AddFallback("fallback_scale", "小米体脂秤 S400", "xiaomi.scale.v2", nameof(HealthDeviceCategory.BodyComposition), "卫浴空间");

        return list;
    }

    private static HomeAssistantSummaryOutput BuildSummary(
        IReadOnlyList<HomeAssistantDiscoveredDeviceOutput> devices,
        IReadOnlyList<HomeAssistantState> states)
    {
        var totalDevices = devices.Count;
        var onlineDevices = devices.Count(d => d.Online);
        var offlineDevices = totalDevices - onlineDevices;
        var totalEntities = states.Count;
        var availableEntities = states.Count(IsAvailable);

        return new HomeAssistantSummaryOutput
        {
            TotalDevices = totalDevices,
            OnlineDevices = onlineDevices,
            OfflineDevices = offlineDevices,
            TotalEntities = totalEntities,
            AvailableEntities = availableEntities
        };
    }

    private HomeAssistantSceneDevicesSummaryOutput BuildSceneDevicesSummary(IReadOnlyDictionary<string, HomeAssistantState> stateMap)
    {
        var entities = _options.Entities;
        var sceneAvailableCount = 0;

        if (!string.IsNullOrWhiteSpace(entities.Dehumidifier) &&
            stateMap.TryGetValue(entities.Dehumidifier, out var sDehum) && IsAvailable(sDehum))
            sceneAvailableCount++;

        if (!string.IsNullOrWhiteSpace(entities.FragranceSwitch) &&
            stateMap.TryGetValue(entities.FragranceSwitch, out var sFrag) && IsAvailable(sFrag))
            sceneAvailableCount++;

        if (!string.IsNullOrWhiteSpace(entities.AmbientLight) &&
            stateMap.TryGetValue(entities.AmbientLight, out var sLight) && IsAvailable(sLight))
            sceneAvailableCount++;

        var speakerOnline = (!string.IsNullOrWhiteSpace(entities.Speaker) &&
                             stateMap.TryGetValue(entities.Speaker, out var sSpk) && IsAvailable(sSpk))
                            || (!string.IsNullOrWhiteSpace(entities.SpeakerSleepMode) &&
                                stateMap.TryGetValue(entities.SpeakerSleepMode, out var sSpkSleep) && IsAvailable(sSpkSleep));
        if (speakerOnline) sceneAvailableCount++;

        return new HomeAssistantSceneDevicesSummaryOutput
        {
            Total = 4,
            Available = Math.Min(4, sceneAvailableCount)
        };
    }

    private HomeAssistantEnvironmentOutput BuildEnvironmentOutput(
        IReadOnlyDictionary<string, HomeAssistantState> stateMap,
        IReadOnlyList<HomeAssistantDiscoveredDeviceOutput> devices)
    {
        var entities = _options.Entities;
        var envDevice = devices.FirstOrDefault(d => d.Category == nameof(HealthDeviceCategory.EnvironmentSensor));

        double? GetVal(string entityId, string metricKey)
        {
            if (envDevice?.Metrics.TryGetValue(metricKey, out var mv) == true && mv != null)
            {
                if (double.TryParse(mv.ToString(), out var dVal)) return dVal;
            }
            if (!string.IsNullOrWhiteSpace(entityId) && stateMap.TryGetValue(entityId, out var state) && IsAvailable(state))
            {
                if (double.TryParse(state.State, out var dVal)) return dVal;
            }
            return null;
        }

        var humidity = GetVal(entities.Humidity, "humidity");
        if (humidity == null && !string.IsNullOrWhiteSpace(entities.Dehumidifier) &&
            stateMap.TryGetValue(entities.Dehumidifier, out var dehumState) && IsAvailable(dehumState))
        {
            humidity = dehumState.GetDoubleAttribute("current_humidity");
        }

        return new HomeAssistantEnvironmentOutput
        {
            Temperature = GetVal(entities.Temperature, "temperature"),
            Humidity = humidity,
            Pm25 = GetVal(entities.Pm25, "pm25"),
            Co2 = GetVal(entities.Co2, "co2"),
            Hcho = GetVal(entities.Formaldehyde, "hcho"),
            Tvoc = GetVal(entities.Tvoc, "tvoc")
        };
    }

    private static string CategorizeDevice(
        string name,
        string model,
        string manufacturer,
        IReadOnlyList<HomeAssistantEntityOutput> entities)
    {
        var text = $"{name} {model} {manufacturer}".ToLowerInvariant();

        if (text.Contains("除湿") || text.Contains("derh") || entities.Any(e => e.Domain == "humidifier"))
            return nameof(HealthDeviceCategory.EnvironmentControl);

        if (text.Contains("空气检测") || text.Contains("airm") || text.Contains("et71"))
            return nameof(HealthDeviceCategory.EnvironmentSensor);

        if (text.Contains("床垫") || text.Contains("mattress"))
            return nameof(HealthDeviceCategory.Sleep);

        if (text.Contains("体脂") || text.Contains("scale"))
            return nameof(HealthDeviceCategory.BodyComposition);

        if (text.Contains("香氛") || text.Contains("diffuser") || text.Contains("xw002"))
            return nameof(HealthDeviceCategory.Fragrance);

        if (text.Contains("灯") || text.Contains("light") || text.Contains("lemesh"))
            return nameof(HealthDeviceCategory.Lighting);

        if (text.Contains("sound") || text.Contains("音箱") || text.Contains("wifispeaker") || text.Contains("l17a") || entities.Any(e => e.Domain == "media_player"))
            return nameof(HealthDeviceCategory.Media);

        return nameof(HealthDeviceCategory.Other);
    }

    private static Dictionary<string, object?> ExtractDeviceMetrics(string category, IReadOnlyList<HomeAssistantEntityOutput> entities)
    {
        var metrics = new Dictionary<string, object?>(StringComparer.OrdinalIgnoreCase);

        foreach (var entity in entities)
        {
            if (!entity.Available) continue;
            var id = entity.EntityId.ToLowerInvariant();

            if (id.Contains("relative_humidity") || (entity.Domain == "humidifier" && entity.Attributes?.ContainsKey("current_humidity") == true))
            {
                metrics["humidity"] = entity.Attributes?.GetValueOrDefault("current_humidity") ?? entity.State;
            }
            if (entity.Domain == "humidifier")
            {
                if (entity.Attributes?.TryGetValue("humidity", out var th) == true) metrics["targetHumidity"] = th;
                if (entity.Attributes?.TryGetValue("mode", out var mode) == true) metrics["mode"] = mode;
            }
            if (id.Contains("temperature")) metrics["temperature"] = entity.State;
            if (id.Contains("pm2_5") || id.Contains("pm25")) metrics["pm25"] = entity.State;
            if (id.Contains("pm10")) metrics["pm10"] = entity.State;
            if (id.Contains("co2")) metrics["co2"] = entity.State;
            if (id.Contains("hcho") || id.Contains("formaldehyde")) metrics["hcho"] = entity.State;
            if (id.Contains("tvoc")) metrics["tvoc"] = entity.State;
            if (id.Contains("weight")) metrics["weight"] = entity.State;
            if (id.Contains("body_fat") || id.Contains("fat_rate")) metrics["bodyFatRate"] = entity.State;
            if (id.Contains("firmness") || id.Contains("soft")) metrics["firmness"] = entity.State;
            if (id.Contains("sleep_state") || id.Contains("sleep_status")) metrics["sleepStatus"] = entity.State;
        }

        return metrics;
    }

    private static Dictionary<string, object?>? ExtractSafeAttributes(HomeAssistantState? state)
    {
        if (state == null || state.Attributes.ValueKind != JsonValueKind.Object) return null;
        var safe = new Dictionary<string, object?>(StringComparer.OrdinalIgnoreCase);
        var safeKeys = new[] {
            "friendly_name", "unit_of_measurement", "device_class",
            "current_humidity", "humidity", "mode", "fan_mode", "percentage",
            "brightness", "color_temp", "color_temp_kelvin",
            "volume_level", "is_volume_muted", "media_title",
            "battery_level", "temperature"
        };

        foreach (var key in safeKeys)
        {
            if (state.Attributes.TryGetProperty(key, out var prop))
            {
                safe[key] = prop.ValueKind switch
                {
                    JsonValueKind.String => prop.GetString(),
                    JsonValueKind.Number => prop.TryGetInt64(out var l) ? l : prop.GetDouble(),
                    JsonValueKind.True => true,
                    JsonValueKind.False => false,
                    _ => prop.ToString()
                };
            }
        }
        return safe.Count > 0 ? safe : null;
    }

    private static bool IsAvailable(HomeAssistantState state)
        => state.State is not ("unavailable" or "unknown");
}