using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Text;
using System.Text.Json;

namespace AutoFocusTool.Calib
{
    /// <summary>单个 well 的标定结果。</summary>
    public class WellCalib
    {
        public int Well;
        public int HorizontalPulse;   // 标定出的最居中水平位置(脉冲)
        public int Exposure;          // 合适曝光(×100µs)
        public int FocusZ;            // 最清晰层Z(脉冲)
        public double CenterOffsetPct; // 标定后圆心偏移(%)，残留偏移
        public bool CircleFound;
        public double PeakSharp;       // 对焦峰值清晰度
        public double PeakRatio;       // max/mean，>1.2 视为有真实焦点
        public string Note = "";
    }

    /// <summary>单个舱室的标定结果。</summary>
    public class HouseCalib
    {
        public int House;
        public string Port;
        public int CcdIndex;
        public string CcdSn;
        public List<WellCalib> Wells = new List<WellCalib>();
    }

    /// <summary>
    /// 整机标定档案 + JSON 读写（手写，不依赖第三方库）。
    /// 日常使用直接读此档案的 HorizontalPulse/Exposure/FocusZ，不再逐项试。
    /// 也是移植进主项目的交接数据。
    /// </summary>
    public class CalibrationFile
    {
        public string TlSn = "";
        public string Date = "";
        public List<HouseCalib> Houses = new List<HouseCalib>();

        public WellCalib Find(int house, int well)
            => Houses.Find(h => h.House == house)?.Wells.Find(w => w.Well == well);

        /// <summary>从 JSON 文件加载标定档案。</summary>
        public static CalibrationFile Load(string path)
        {
            string json = File.ReadAllText(path, Encoding.UTF8);
            // 关键：本类用 public 字段而非属性，System.Text.Json 默认忽略字段，
            // 必须开 IncludeFields，否则反序列化得到空对象(舱数0)，标定闭环静默失效。
            var options = new JsonSerializerOptions
            {
                PropertyNameCaseInsensitive = true,
                IncludeFields = true
            };
            return JsonSerializer.Deserialize<CalibrationFile>(json, options);
        }

        public void Save(string path)
        {
            var sb = new StringBuilder();
            sb.Append("{\n");
            sb.Append($"  \"tlSn\": \"{Esc(TlSn)}\",\n");
            sb.Append($"  \"date\": \"{Esc(Date)}\",\n");
            sb.Append("  \"houses\": [\n");
            for (int i = 0; i < Houses.Count; i++)
            {
                var h = Houses[i];
                sb.Append("    {\n");
                sb.Append($"      \"house\": {h.House}, \"port\": \"{Esc(h.Port)}\", \"ccdIndex\": {h.CcdIndex}, \"ccdSn\": \"{Esc(h.CcdSn)}\",\n");
                sb.Append("      \"wells\": [\n");
                for (int j = 0; j < h.Wells.Count; j++)
                {
                    var w = h.Wells[j];
                    sb.Append("        {");
                    sb.Append($"\"well\": {w.Well}, \"horizontalPulse\": {w.HorizontalPulse}, \"exposure\": {w.Exposure}, \"focusZ\": {w.FocusZ}, ");
                    sb.Append($"\"centerOffsetPct\": {F(w.CenterOffsetPct)}, \"circleFound\": {(w.CircleFound ? "true" : "false")}, ");
                    sb.Append($"\"peakSharp\": {F(w.PeakSharp)}, \"peakRatio\": {F(w.PeakRatio)}, \"note\": \"{Esc(w.Note)}\"");
                    sb.Append(j < h.Wells.Count - 1 ? "},\n" : "}\n");
                }
                sb.Append("      ]\n");
                sb.Append(i < Houses.Count - 1 ? "    },\n" : "    }\n");
            }
            sb.Append("  ]\n}\n");
            File.WriteAllText(path, sb.ToString(), Encoding.UTF8);
        }

        static string F(double d) => d.ToString("0.###", CultureInfo.InvariantCulture);
        static string Esc(string s) => (s ?? "").Replace("\\", "\\\\").Replace("\"", "\\\"");
    }
}