using System.ComponentModel;
using Dabit.Mcp.Services;
using DibdProtocol.Protocol;
using Microsoft.Extensions.Logging;
using ModelContextProtocol.Server;

namespace Dabit.Mcp.Tools;

/// <summary>컨트롤러 시각 동기화 도구. ⚠️ 쓰기.</summary>
[McpServerToolType]
public sealed class TimeTools
{
    private readonly LedControlService _led;
    private readonly ILogger<TimeTools> _log;

    public TimeTools(LedControlService led, ILogger<TimeTools> log)
    {
        _led = led;
        _log = log;
    }

    // 정본 SettingsViewModel: ToBcd(v) = (v/10*16)+(v%10). 26 → 0x26.
    private static byte ToBcd(int v) => (byte)(v / 10 * 16 + v % 10);

    private static string KoreanDow(DayOfWeek d) => d switch
    {
        DayOfWeek.Sunday => "일", DayOfWeek.Monday => "월", DayOfWeek.Tuesday => "화",
        DayOfWeek.Wednesday => "수", DayOfWeek.Thursday => "목", DayOfWeek.Friday => "금",
        _ => "토",
    };

    [McpServerTool]
    [Description("컨트롤러의 시각(RTC)을 현재 PC 시간으로 동기화한다. ⚠️ 쓰기·설정 저장.")]
    public async Task<string> SyncControllerTime(CancellationToken ct = default)
    {
        var now = DateTime.Now;
        // 정본 0x47: [yy(BCD), MM(BCD), dd(BCD), dow(raw 0=일~6=토), HH(BCD), mm(BCD), ss(BCD)]
        byte[] payload =
        {
            ToBcd(now.Year % 100), ToBcd(now.Month), ToBcd(now.Day),
            (byte)(int)now.DayOfWeek,
            ToBcd(now.Hour), ToBcd(now.Minute), ToBcd(now.Second),
        };
        var resp = await _led.SendHexAsync(HexCommand.SyncTime, payload, ct, 5000);
        var (ok, msg) = LedControlService.CheckWriteStatus(HexCommand.SyncTime, resp);
        return ok
            ? $"시간 동기화 완료: {now:yyyy-MM-dd HH:mm:ss} ({KoreanDow(now.DayOfWeek)})."
            : $"시간 동기화 실패 — {msg}";
    }
}