using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using leak_test_project.Models;

namespace leak_test_project.Utils
{
    public static class LogParser
    {
        private static readonly string LogDirectory = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Logs");

        public static List<InspectData> ParseLogs(DateTime start, DateTime end, string judgmentFilter = "[전체]", string serialFilter = "")
        {
            var results = new List<InspectData>();

            if (!Directory.Exists(LogDirectory))
            {
                // 디렉토리가 없으면 빈 리스트 반환
                return results;
            }

            // 날짜 범위 내의 모든 로그 파일 찾기 (.csv)
            var files = Directory.GetFiles(LogDirectory, "*.csv")
                .Where(f => {
                    string fileName = Path.GetFileNameWithoutExtension(f);
                    if (DateTime.TryParse(fileName, out DateTime fileDate))
                    {
                        return fileDate.Date >= start.Date && fileDate.Date <= end.Date;
                    }
                    return false;
                });

            foreach (var file in files)
            {
                try
                {
                    var lines = File.ReadAllLines(file);
                    if (lines.Length <= 1) continue; // Header only or empty

                    // CSV 헤더: Date,Time,Channel,ID,Value,Judgment,Mode,LineNo,ProductType,SpecUL,SpecLL,Retest
                    for (int i = 1; i < lines.Length; i++)
                    {
                        string line = lines[i];
                        if (string.IsNullOrWhiteSpace(line)) continue;
                        var parts = line.Split(',');
                        if (parts.Length < 12) continue;

                        string date = parts[0].Trim();
                        string time = parts[1].Trim();
                        string channel = parts[2].Trim();
                        string id = parts[3].Trim();
                        string val = parts[4].Trim();
                        string judg = parts[5].Trim();
                        string mode = parts[6].Trim();
                        string lineNo = parts[7].Trim();
                        string prodType = parts[8].Trim();
                        string specUl = parts[9].Trim();
                        string specLl = parts[10].Trim();
                        string retest = parts[11].Trim();

                        // 필터 적용
                        if (judgmentFilter != "[전체]" && judg != judgmentFilter) continue;
                        if (!string.IsNullOrEmpty(serialFilter) && !id.Contains(serialFilter)) continue;

                        results.Add(new InspectData
                        {
                            InspectDate = date,
                            InspectTime = time,
                            Channel = channel,
                            ProductId = id,
                            MeasuredValue = val,
                            Judgment = judg,
                            Mode = mode,
                            LineNo = lineNo,
                            ProductType = prodType,
                            SpecUL = specUl,
                            SpecLL = specLl,
                            Retest = retest
                        });
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine($"[LogParser] Error reading file {file}: {ex.Message}");
                }
            }

            return results.OrderByDescending(r => r.InspectDate).ThenByDescending(r => r.InspectTime).ToList();
        }
    }
}