using System;
using System.Collections.Generic;
using System.IO;
using leak_test_project.Models;

namespace leak_test_project.Utils
{
    public class DioConfigParser
    {
        public string CompanyName { get; set; } = "ADLink";
        public string BoardType { get; set; } = "PCI_7432";
        public int BoardNumber { get; set; } = 0;
        public List<DioPoint> InputPoints { get; private set; } = new List<DioPoint>();
        public List<DioPoint> OutputPoints { get; private set; } = new List<DioPoint>();

        public bool Load(string filePath)
        {
            if (!File.Exists(filePath)) return false;

            try
            {
                var lines = File.ReadAllLines(filePath);
                string currentSection = "";
                InputPoints.Clear();
                OutputPoints.Clear();

                foreach (var rawLine in lines)
                {
                    string line = rawLine.Split(new[] { "//" }, StringSplitOptions.None)[0].Trim();
                    if (string.IsNullOrEmpty(line)) continue;

                    if (line.StartsWith("[") && line.Contains("]"))
                    {
                        currentSection = line.Substring(1, line.IndexOf(']') - 1).ToUpper();
                        continue;
                    }

                    int eqIdx = line.IndexOf('=');
                    if (eqIdx < 0) continue;

                    string key = line.Substring(0, eqIdx).Trim();
                    string value = line.Substring(eqIdx + 1).Trim().TrimEnd(',');

                    switch (currentSection)
                    {
                        case "DIO":
                            if (key == "CompanyName") CompanyName = value;
                            break;
                        case "BOARD_1":
                            if (key == "BoardType") BoardType = value;
                            else if (key == "BoardNumber") { if (int.TryParse(value, out int bn)) BoardNumber = bn; }
                            break;
                        case "BOARD_1_IN":
                            ParsePointEntry(key, value, true);
                            break;
                        case "BOARD_1_OUT":
                            ParsePointEntry(key, value, false);
                            break;
                    }
                }
                return true;
            }
            catch { return false; }
        }

        private void ParsePointEntry(string index, string value, bool isInput)
        {
            var parts = value.Split(',');
            var point = new DioPoint
            {
                Name = parts[0].Trim(),
                Description = parts.Length > 2 ? parts[2].Trim() : "",
                IsInput = isInput
            };
            if (isInput) InputPoints.Add(point); else OutputPoints.Add(point);
        }

        public void Save(string filePath)
        {
            string dir = Path.GetDirectoryName(filePath);
            if (!string.IsNullOrEmpty(dir) && !Directory.Exists(dir)) Directory.CreateDirectory(dir);

            using (var sw = new StreamWriter(filePath))
            {
                sw.WriteLine("[DIO]");
                sw.WriteLine($"CompanyName={CompanyName}");
                sw.WriteLine("BoardCnt=1");
                sw.WriteLine("LogEnabled=False");
                sw.WriteLine();
                sw.WriteLine("[BOARD_1]");
                sw.WriteLine($"BoardType={BoardType}");
                sw.WriteLine($"BoardNumber={BoardNumber}");
                sw.WriteLine($"InPortCnt={InputPoints.Count}");
                sw.WriteLine($"OutPortCnt={OutputPoints.Count}");
                sw.WriteLine();
                sw.WriteLine("[BOARD_1_IN]");
                for (int i = 0; i < InputPoints.Count; i++)
                    sw.WriteLine($"{i}={InputPoints[i].Name},1,{(string.IsNullOrEmpty(InputPoints[i].Description) ? "" : InputPoints[i].Description)}");
                sw.WriteLine();
                sw.WriteLine("[BOARD_1_OUT]");
                for (int i = 0; i < OutputPoints.Count; i++)
                    sw.WriteLine($"{i}={OutputPoints[i].Name},1,{(string.IsNullOrEmpty(OutputPoints[i].Description) ? "" : OutputPoints[i].Description)}");
            }
        }

        public static DioConfigParser LoadDefault()
        {
            var parser = new DioConfigParser();
            string localPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Settings", "DioConfig.ini");
            string legacyPath = @"C:\Users\COMPUTER1\Desktop\LeakTester\Settings\DioConfig.ini";

            if (File.Exists(localPath)) parser.Load(localPath);
            else if (File.Exists(legacyPath)) parser.Load(legacyPath);
            else
            {
                // 파일 없을 때 기본 생성 (사용자 양식 반영)
                parser.InputPoints.Add(new DioPoint { Name = "LEFT_START", Description = "좌측 시험 시작 신호" });
                parser.InputPoints.Add(new DioPoint { Name = "RIGHT_START", Description = "우측 시험 시작 신호" });

                parser.OutputPoints.Add(new DioPoint { Name = "LEFT_OK", Description = "좌측 합격 출력" });
                parser.OutputPoints.Add(new DioPoint { Name = "RIGHT_OK", Description = "우측 합격 출력" });
                parser.OutputPoints.Add(new DioPoint { Name = "PC_ON", Description = "PC 가동 신호" });
                parser.OutputPoints.Add(new DioPoint { Name = "LEFT_NG", Description = "좌측 불합격 출력" });
                parser.OutputPoints.Add(new DioPoint { Name = "RIGHT_NG", Description = "우측 불합격 출력" });
                
                parser.Save(localPath);
            }
            return parser;
        }
    }
}