using System.Collections.ObjectModel;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using SSPCTester.Devices.Interfaces;
using SSPCTester.Logic.Models;
using SSPCTester.UI.Services;

namespace SSPCTester.UI.ViewModels;

/// <summary>保护功能页 VM。</summary>
public partial class ProtectViewModel : ObservableObject
{
    private readonly IPowerSupply _power;
    private readonly UiLogSink _log;
    private TestSessionViewModel? _session;
    public ObservableCollection<ProtectRow> Rows { get; } = new();

    [ObservableProperty] private Project? _project;

    public ProtectViewModel(IPowerSupply power, UiLogSink log)
    {
        _power = power;
        _log = log;
    }

    public void SetProject(Project p)
    {
        Project = p;
        ProtectTestPlan.EnsureRows(p);
        SyncRowsFromProject();
    }

    public void AttachSession(TestSessionViewModel session)
    {
        if (_session != null)
            _session.ProtectResultsChanged -= SyncRowsFromProject;

        _session = session;
        _session.ProtectResultsChanged += SyncRowsFromProject;
    }

    private void SyncRowsFromProject()
    {
        if (Project == null) return;

        ProtectTestPlan.RefreshMeasuredValues(Project, overwriteExisting: false);
        Rows.Clear();
        foreach (var row in Project.ProtectResults) Rows.Add(row);
    }

    [RelayCommand]
    private async Task MeasurePowerAsync(ProtectRow? row)
    {
        if (row == null || !row.CanMeasureFromPower) return;

        try
        {
            var (volts, amps) = await _power.ReadAsync();
            row.MeasuredValue = row.ProtectType switch
            {
                "过压" or "欠压" => $"{volts:F3} V",
                _ => $"{amps:F3} A"
            };
            if (row.Status is TestStatus.Untested or TestStatus.Running)
                row.Status = TestStatus.Measured;
            _log.Add(UiLogLevel.Success, $"保护功能 {row.ProtectType} 实测值：{row.MeasuredValue}");
        }
        catch (Exception ex)
        {
            _log.Add(UiLogLevel.Error, $"读取电源失败：{ex.Message}");
        }
    }
}