using System;
using System.Threading.Tasks;

namespace TabletTester2025.Services
{
    public class PlcSimulator : IPlcService
    {
        private Random _rand = new Random();
        private bool _connected = true;

        public Task ConnectAsync() => Task.CompletedTask;
        public Task<bool> CheckConnectionAsync() => Task.FromResult(_connected);
        public bool IsConnected => _connected;

        public Task<float> ReadFloatAsync(ushort startAddress)
        {
            // 模拟不同地址的数据
            float value = startAddress switch
            {
                100 => 40 + (float)_rand.NextDouble() * 20,   // 硬度 40~60N
                410 => 100f,                                   // 脆碎圈数
                412 => 5.0f + (float)_rand.NextDouble() * 2,  // 脆碎度前重
                414 => 4.9f + (float)_rand.NextDouble() * 2,  // 后重
                300 => 37.0f,                                 // 温度
                400 => 50 + (float)_rand.NextDouble() * 30,   // 转速
                402 => 70 + (float)_rand.NextDouble() * 30,   // 溶出度%
                404 => 70 + (float)_rand.NextDouble() * 30,   // 溶出2溶出度%
                1430 => 37.0f,                                // 水浴温度
                _ => 0
            };
            return Task.FromResult(value);
        }

        // 👇 新增 ReadIntAsync 的模拟实现
        public Task<int> ReadIntAsync(ushort startAddress)
        {
            int value = startAddress switch
            {
                410 => 100, // 脆碎圈数
                _ => _rand.Next(0, 1000)
            };
            return Task.FromResult(value);
        }

        public Task WriteCoilAsync(ushort coilAddress, bool value) => Task.CompletedTask;

        public Task<bool> ReadCoilAsync(ushort coilAddress)
        {
            // 模拟完成信号：随机返回 true/false
            return Task.FromResult(_rand.Next(2) == 1);
        }

        public Task WriteRegisterAsync(ushort registerAddress, ushort value) => Task.CompletedTask;

        public Task WriteFloatAsync(ushort startAddress, float value) => Task.CompletedTask;

        public Task<ushort[]> ReadHoldingRegistersAsync(ushort startAddress, ushort count)
        {
            var data = new ushort[count];
            for (int i = 0; i < count; i++)
                data[i] = (ushort)_rand.Next(0, 65535);
            return Task.FromResult(data);
        }
    }
}