using Microsoft.Extensions.Logging;
using System.Collections.ObjectModel;

namespace File_Folder_Helper.Day.Q32024;

internal static partial class Helper20240828
{

    public record Record(string? CassetteId,
                         ReadOnlyCollection<string>? CassetteSegments,
                         DateTime? Date,
                         string? Employee,
                         ReadOnlyCollection<string>? EquipmentSegments,
                         int I,
                         string? LastDate,
                         ReadOnlyCollection<ReadOnlyCollection<string>>? Matches);

    private static Record GetRecord(int i, string? lastDate, ReadOnlyCollection<ReadOnlyCollection<string>> matches)
    {
        Record result;
        if (matches.Count != 4 || matches[0].Count != 3 || matches[3].Count != 3)
            result = new Record(null, null, null, null, null, i, null, null);
        else
        {
            string[] equipmentSegments = matches[1][2].Split('|');
            if (equipmentSegments.Length != 2)
                result = new Record(null, null, null, null, null, i, null, null);
            else
            {
                string[] cassetteIdSegments = matches[3][2].Split('|');
                if (cassetteIdSegments.Length <= 3)
                    result = new Record(null, null, null, null, null, i, null, null);
                else
                    result = new Record(cassetteIdSegments[2],
                                        new(cassetteIdSegments),
                                        DateTime.Parse(matches[0][0]),
                                        matches[0][1],
                                        new(equipmentSegments),
                                        i,
                                        lastDate,
                                        new(matches));
            }
        }
        return result;
    }

    private static Record GetRecord(string[] lines, int i)
    {
        Record result;
        int ii = i;
        string line;
        string[] segments;
        string? lastDate = null;
        List<ReadOnlyCollection<string>> matches = [];
        for (int j = i; j >= 0; j--)
        {
            ii = j;
            line = lines[j];
            segments = line.Split(',');
            if (segments.Length < 2)
                continue;
            lastDate ??= segments[0];
            if (segments[0] != lastDate)
            {
                lastDate = segments[0];
                break;
            }
            matches.Add(new(segments));
        }
        result = GetRecord(ii + 1, lastDate, new(matches));
        return result;
    }

    private static ReadOnlyCollection<Record> GetRecords(string logDirectory, string logSearchPattern)
    {
        List<Record> results = [];
        Record record;
        string[] lines;
        string[] logFiles = Directory.GetFiles(logDirectory, logSearchPattern, SearchOption.TopDirectoryOnly);
        foreach (string logFile in logFiles)
        {
            lines = File.ReadAllLines(logFile);
            for (int i = lines.Length - 1; i >= 0; i--)
            {
                record = GetRecord(lines, i);
                i = record.I;
                if (record.CassetteId is null || record.CassetteSegments is null || record.Date is null || record.Employee is null || record.EquipmentSegments is null)
                {
                    if (i < 4)
                        break;
                    continue;
                }
                results.Add(record);
            }
        }
        return new(results);
    }

    private static Dictionary<int, ReadOnlyCollection<Record>> GetKeyValuePairs(Dictionary<int, List<Record>> keyValuePairs)
    {
        Dictionary<int, ReadOnlyCollection<Record>> results = [];
        foreach (KeyValuePair<int, List<Record>> keyValuePair in keyValuePairs)
            results.Add(keyValuePair.Key, new(keyValuePair.Value));
        return new(results);
    }

    private static Dictionary<int, ReadOnlyCollection<Record>> GetKeyValuePairs(string logSearchPattern, string logDirectory)
    {
        Dictionary<int, ReadOnlyCollection<Record>> results;
        int totalMinutes;
        TimeSpan timeSpan;
        List<Record>? collection;
        Dictionary<int, List<Record>> keyValuePairs = [];
        ReadOnlyCollection<Record> records = GetRecords(logDirectory, logSearchPattern);
        foreach (Record record in records)
        {
            if (record.CassetteId is null || record.CassetteSegments is null || record.Date is null || record.Employee is null || record.EquipmentSegments is null)
                continue;
            timeSpan = TimeSpan.FromTicks(record.Date.Value.Ticks);
            totalMinutes = (int)Math.Floor(timeSpan.TotalMinutes);
            if (!keyValuePairs.TryGetValue(totalMinutes, out collection))
            {
                keyValuePairs.Add(totalMinutes, []);
                if (!keyValuePairs.TryGetValue(totalMinutes, out collection))
                    throw new Exception();
            }
            collection.Add(record);
        }
        results = GetKeyValuePairs(keyValuePairs);
        return results;
    }

    internal static void MoveWaferCounterToArchive(ILogger<Worker> logger, List<string> args)
    {
        int totalMinutes;
        string checkFile;
        TimeSpan timeSpan;
        string? checkDirectory;
        string logDateFormat = args[3];
        string wcSearchPattern = args[5];
        string logSearchPattern = args[2];
        ReadOnlyCollection<Record>? records;
        string logDirectory = Path.GetFullPath(args[0]);
        string sourceDirectory = Path.GetFullPath(args[4]);
        Dictionary<int, ReadOnlyCollection<Record>> keyValuePairs = GetKeyValuePairs(logSearchPattern, logDirectory);
        logger.LogInformation("Mapped {keyValuePairs}(s)", keyValuePairs.Count);
        FileInfo[] collection = Directory.GetFiles(sourceDirectory, wcSearchPattern, SearchOption.AllDirectories).Select(l => new FileInfo(l)).ToArray();
        logger.LogInformation("Found {collection}(s)", collection.Length);
        foreach (FileInfo fileInfo in collection)
        {
            timeSpan = TimeSpan.FromTicks(fileInfo.LastWriteTime.Ticks);
            totalMinutes = (int)Math.Floor(timeSpan.TotalMinutes);
            if (!keyValuePairs.TryGetValue(totalMinutes, out records))
                continue;
            if (records.Count != 1)
                continue;
            checkDirectory = Path.Combine(logDirectory, timeSpan.ToString(logDateFormat));
            if (string.IsNullOrEmpty(checkDirectory))
                continue;
            if (!Directory.Exists(checkDirectory))
                _ = Directory.CreateDirectory(checkDirectory);
            checkFile = Path.Combine(checkDirectory, fileInfo.Name);
            if (File.Exists(checkFile))
                continue;
            File.Move(fileInfo.FullName, checkFile);
        }
    }

}