using System;
using System.Collections.Generic;
using System.Linq;
using CncSimulator.Config;
using CncSimulator.Device;
using CncSimulator.Generator;

namespace CncSimulator.Device
{
    /// <summary>单台设备的状态机与仿真逻辑</summary>
    public class DeviceSimulator
    {
        public DeviceState State { get; private set; }
        private readonly Random _rnd;
        private readonly List<string> _programs = new List<string> { "O0001", "O0002", "1566.NC", "PART-A", "TEST-03" };
        private int _currentScenarioIndex = 0;
        private int _tickCounter = 0;

        public DeviceSimulator(DeviceConfig cfg, int dataChangeInterval)
        {
            State = new DeviceState
            {
                DeviceCode = cfg.DeviceCode,
                Desc = cfg.Desc,
                ProgramName = cfg.InitialProgram ?? "O0001",
                PartCount = cfg.InitialPartCount,
                DataChangeInterval = dataChangeInterval
            };
            // 使用不同种子避免同步
            _rnd = new Random(cfg.DeviceCode.GetHashCode());
            // 初始化一个随机偏移，确保场景起始不一致
            _currentScenarioIndex = _rnd.Next(0, _programs.Count);
        }

        public void Tick()
        {
            if (!State.IsOnline) return;
            // 简易定时器：每次 Tick 增加一个单位时间，依据当前场景更新数据
            _tickCounter++;
            // 每次数据变化的间隔由 DataChangeInterval 决定
            if (_tickCounter < State.DataChangeInterval) return;
            _tickCounter = 0;

            // 根据当前场景执行更新逻辑
            switch (State.CurrentScenario)
            {
                case "machining":
                    State.PartCount += 1;
                    State.RunStatus = 3;
                    State.OperateMode = 1;
                    State.MachiningStatus = "G01";
                    break;
                default:
                    break;
            }
        }

        public void SetScenario(string scenarioName, int duration)
        {
            State.CurrentScenario = scenarioName;
            State.ScenarioDuration = duration;
            State.ScenarioTick = 0;
        }

        // 简化的场景更新接口，供 ScenarioPlayer 调用
        public void ApplyScenarioUpdate(string scenarioName, int duration, string programOverride = null)
        {
            SetScenario(scenarioName, duration);
            if (!string.IsNullOrWhiteSpace(programOverride))
            {
                State.ProgramName = programOverride;
            }
        }
    }
}