using Evergreen.Health.Application.Health.Integrations.HomeAssistant;
using Evergreen.Health.Application.Health.Scenes;
using Evergreen.Health.Application.Health.Sleep;
using Microsoft.Extensions.Options;

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

public sealed class BedPresenceDehumidifierStartAction(DehumidifierModule dehumidifier, DeviceActionRunner runner,
    IOptions<HomeAssistantOptions> options, TimeProvider clock) : IBedPresenceAction
{
    private HomeAssistantOptions Configuration => options.Value;

    public string Key => "dehumidifier-humidity-start";
    public string Description => "湿度偏高时开启除湿机";
    public string ConditionLabel => $"室内相对湿度超过 {Configuration.SleepScene.TargetHumidity}% 且除湿机关机时，发送开机指令。";

    public bool SupportsTarget(string entityId) => entityId == dehumidifier.PrimaryEntityId &&
        DehumidifierHumidityCondition.SupportsTarget(Configuration, entityId);

    public async Task<string> ExecuteAsync(string entityId, CancellationToken token)
    {
        if (!SupportsTarget(entityId)) return "target-not-configured";
        var command = dehumidifier.BuildStartCommand() with
        {
            ExpectedState = "on",
            RetryOnVerificationMismatch = false
        };
        var reason = await runner.SendIfAsync(command, states => GetSkipReason(states, entityId), token);
        if (reason is not null) return reason;

        try
        {
            await runner.VerifyParameterAsync(command, token);
            return "readback-confirmed";
        }
        catch (InvalidOperationException)
        {
            return "sent-readback-unconfirmed";
        }
    }

    private string? GetSkipReason(IReadOnlyList<HomeAssistantState> states, string entityId)
    {
        var reason = DehumidifierHumidityCondition.SkipReason(states, Configuration, clock.GetUtcNow());
        if (reason is not null) return reason;

        var state = states.FirstOrDefault(item => string.Equals(item.EntityId, entityId, StringComparison.OrdinalIgnoreCase));
        if (state is null || !DeviceActionRunner.IsAvailable(state)) return "dehumidifier-unavailable";
        return state.State switch
        {
            "off" => null,
            "on" => "dehumidifier-already-on",
            _ => "dehumidifier-state-not-off"
        };
    }
}