using Evergreen.Health.Application.Health.Integrations.HomeAssistant;
using Evergreen.Health.Application.Health.Scenes;
using System.Globalization;

namespace Evergreen.Health.Application.Health.Devices.Dehumidifier;

internal static class DehumidifierHumidityCondition
{
    private static readonly TimeSpan MaxHumidityAge = TimeSpan.FromMinutes(30);

    public static bool SupportsTarget(HomeAssistantOptions configuration, string entityId) =>
        configuration.Enabled && configuration.SleepScene.TargetHumidity is >= 40 and <= 70 &&
        entityId?.StartsWith("humidifier.", StringComparison.Ordinal) == true &&
        entityId == configuration.Entities.Dehumidifier &&
        configuration.Entities.Humidity?.StartsWith("sensor.", StringComparison.Ordinal) == true;

    public static string? SkipReason(IReadOnlyList<HomeAssistantState> states, HomeAssistantOptions configuration, DateTimeOffset now)
    {
        var humidity = states.FirstOrDefault(state =>
            string.Equals(state.EntityId, configuration.Entities.Humidity, StringComparison.OrdinalIgnoreCase));
        if (humidity is null || !DeviceActionRunner.IsAvailable(humidity)) return "humidity-unavailable";

        var observedAt = humidity.LastReported ?? humidity.LastUpdated;
        if (observedAt is null || now - observedAt > MaxHumidityAge || observedAt > now.AddMinutes(1))
            return "humidity-stale";

        if (humidity.GetStringAttribute("unit_of_measurement") != "%" ||
            !double.TryParse(humidity.State, NumberStyles.Float, CultureInfo.InvariantCulture, out var percent) ||
            !double.IsFinite(percent) || percent is < 0 or > 100)
            return "humidity-invalid";

        return percent > configuration.SleepScene.TargetHumidity ? null : "humidity-normal";
    }
}