using CommunityToolkit.Mvvm.ComponentModel;
using HC_APTBS.Services;

namespace HC_APTBS.ViewModels.Pages
{
    /// <summary>
    /// ViewModel for the Bench navigation page.
    ///
    /// <para>Groups the bench-related child ViewModels owned by
    /// <see cref="MainViewModel"/> together with page-specific façades
    /// (temperature control, relay bank, pressure trace, interlock banner)
    /// that only the Bench page consumes.</para>
    /// </summary>
    public sealed class BenchPageViewModel : ObservableObject
    {
        /// <summary>Root ViewModel — owns services, live readings, and global commands.</summary>
        public MainViewModel Root { get; }

        /// <summary>Manual bench controls (direction, RPM start/stop, oil pump, counter).</summary>
        public BenchControlViewModel BenchControl => Root.BenchControl;

        /// <summary>Real-time flowmeter charts (Q-Delivery, Q-Over).</summary>
        public FlowmeterChartViewModel FlowmeterChart => Root.FlowmeterChart;

        /// <summary>Encoder angle monitoring (PSG, INJ, Manual, Lock Angle).</summary>
        public AngleDisplayViewModel AngleDisplay => Root.AngleDisplay;

        /// <summary>Temperature PID setpoint + heater / cooler relay toggles.</summary>
        public TemperatureControlViewModel TempControl { get; }

        /// <summary>Auxiliary relay toggle bank (Electronic, Flasher, Pulse4Signal).</summary>
        public RelayBankViewModel RelayBank { get; }

        /// <summary>Real-time pressure traces (P1, P2).</summary>
        public PressureTraceChartViewModel PressureTrace { get; } = new();

        /// <summary>Soft safety interlock banner state (oil pump / RPM limit).</summary>
        public InterlockBannerViewModel Interlock { get; }

        /// <param name="root">Root view-model providing live bench readings and child VMs.</param>
        /// <param name="benchService">Bench service for setpoint and relay control.</param>
        /// <param name="configService">Configuration service for safety limits and defaults.</param>
        public BenchPageViewModel(
            MainViewModel root,
            IBenchService benchService,
            IConfigurationService configService)
        {
            Root          = root;
            TempControl   = new TemperatureControlViewModel(benchService, configService);
            RelayBank     = new RelayBankViewModel(benchService);
            Interlock     = new InterlockBannerViewModel(configService);
        }

        /// <summary>
        /// Called from <see cref="MainViewModel.OnRefreshTick"/> to feed the
        /// page-scoped VMs (pressure trace, interlock banner) from the latest
        /// bench readings. Keeping this here avoids adding page-specific logic
        /// to the root ViewModel.
        /// </summary>
        public void RefreshFromTick()
        {
            PressureTrace.AddSamples(Root.Pressure, Root.Pressure2);
            Interlock.Update(Root.BenchRpm, BenchControl.IsOilPumpOn);
        }
    }
}