using Microsoft.Extensions.Logging;
using System.Globalization;

namespace File_Folder_Helper.ADO2025.PI7;

internal static partial class Helper20250926 {

    internal static void RenameThenFindFirstAndLast(ILogger<Worker> logger, List<string> args) {
        logger.LogInformation(args[0]);
        logger.LogInformation(args[1]);
        logger.LogInformation(args[2]);
        logger.LogInformation(args[3]);
        logger.LogInformation(args[4]);
        logger.LogInformation(args[5]);
        Rename(logger, args);
        if (args.Count > 99) {
            FindFirstAndLast(logger, args);
        }
    }

    internal static void Rename(ILogger<Worker> logger, List<string> args) {
        string check;
        string[] files;
        string[] lines;
        string checkFile;
        DateTime lastDate;
        string[] segments;
        string[] segmentsB;
        DateTime firstDate;
        const char star = '*';
        const char underscore = '_';
        string dateFormat = args[4];
        string destinationDirectory;
        FileInfo[] fileInfoCollection;
        int seconds = int.Parse(args[5]);
        string[] searchPatterns = args[2].Split('~');
        string sourceDirectory = Path.GetFullPath(args[0]);
        string[] sourceDirectories = Directory.GetDirectories(sourceDirectory, "*", SearchOption.TopDirectoryOnly);
        foreach (string searchPattern in searchPatterns) {
            if (!searchPattern.Contains(underscore) || !searchPattern.Contains(star)) {
                throw new Exception($"{nameof(searchPattern)} must contain {underscore} and {star}");
            }
            segments = searchPattern.Split(star);
            segmentsB = segments[0].Split(underscore);
            foreach (string directory in sourceDirectories) {
                destinationDirectory = Path.Combine(directory, segmentsB[0], segmentsB[1]);
                if (!Directory.Exists(destinationDirectory)) {
                    _ = Directory.CreateDirectory(destinationDirectory);
                }
                files = Directory.GetFiles(directory, searchPattern, SearchOption.TopDirectoryOnly);
                logger.LogInformation("With search pattern '{SearchPattern}' found {files} file(s)", searchPattern, files.Length);
                fileInfoCollection = files.Select(f => new FileInfo(f)).ToArray();
                foreach (FileInfo fileInfo in fileInfoCollection.OrderBy(f => f.LastWriteTime)) {
                    if (fileInfo.Length == 0 || fileInfo.LastWriteTime > DateTime.Now.AddMinutes(-1)) {
                        logger.LogInformation("skipped '{FileInfo}'", fileInfo.FullName);
                        continue;
                    }
                    lastDate = DateTime.MinValue;
                    firstDate = DateTime.MinValue;
                    try {
                        lines = File.ReadAllLines(fileInfo.FullName);
                        foreach (string line in lines) {
                            if (line.Length < dateFormat.Length) {
                                continue;
                            }
                            check = line[..dateFormat.Length];
                            if (!DateTime.TryParseExact(check, dateFormat, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTime logDate)) {
                                continue;
                            }
                            if (firstDate == DateTime.MinValue) {
                                firstDate = logDate;
                            }
                            lastDate = logDate;
                        }
                        checkFile = Path.Combine(destinationDirectory, $"{firstDate:yyyy-MM-dd_HH-mm-ss}---{lastDate:yyyy-MM-dd_HH-mm-ss}.log");
                        if (checkFile == fileInfo.FullName || File.Exists(checkFile)) {
                            logger.LogInformation("skipped '{CheckFile}'", checkFile);
                        } else {
                            logger.LogInformation("rename to '{CheckFile}'", checkFile);
                            File.Move(fileInfo.FullName, checkFile);
                        }
                    } catch {
                        logger.LogInformation("skipped '{FileInfo}'", fileInfo.FullName);
                    }
                }
            }
        }
    }

    internal static void FindFirstAndLast(ILogger<Worker> logger, List<string> args) {
        string line;
        string check;
        string[] files;
        string[] lines;
        DateTime lastDate;
        TimeSpan timeSpan;
        string[] segments;
        string[] segmentsB;
        DateTime firstDate;
        const char star = '*';
        const char underscore = '_';
        string dateFormat = args[4];
        string destinationDirectory;
        FileInfo[] fileInfoCollection;
        string searchString = args[3];
        int seconds = int.Parse(args[5]);
        string[] searchPatterns = args[2].Split('~');
        string sourceDirectory = Path.GetFullPath(args[0]);
        string[] sourceDirectories = Directory.GetDirectories(sourceDirectory, "*", SearchOption.TopDirectoryOnly);
        foreach (string searchPattern in searchPatterns) {
            if (!searchPattern.Contains(underscore) || !searchPattern.Contains(star)) {
                throw new Exception($"{nameof(searchPattern)} must contain {underscore} and {star}");
            }
            segments = searchPattern.Split(star);
            segmentsB = segments[0].Split(underscore);
            foreach (string directory in sourceDirectories) {
                destinationDirectory = Path.Combine(directory, segmentsB[0], segmentsB[1]);
                if (!Directory.Exists(destinationDirectory)) {
                    _ = Directory.CreateDirectory(destinationDirectory);
                }
                files = Directory.GetFiles(destinationDirectory, $"*{segments[^1]}", SearchOption.TopDirectoryOnly);
                logger.LogInformation("With search pattern '{SearchPattern}' found {files} file(s)", searchPattern, files.Length);
                fileInfoCollection = files.Select(f => new FileInfo(f)).ToArray();
                foreach (FileInfo fileInfo in fileInfoCollection.OrderBy(f => f.LastWriteTime)) {
                    if (fileInfo.Length == 0 || fileInfo.LastWriteTime > DateTime.Now.AddMinutes(-1)) {
                        logger.LogInformation("skipped '{FileInfo}'", fileInfo.FullName);
                        continue;
                    }
                    lastDate = DateTime.MinValue;
                    firstDate = DateTime.MinValue;
                    try {
                        lines = File.ReadAllLines(fileInfo.FullName);
                        for (int i = 0; i < lines.Length; i++) {
                            line = lines[i];
                            if (!line.Contains(searchString) || lines[i - 1].Length < dateFormat.Length) {
                                continue;
                            }
                            check = lines[i - 1][..dateFormat.Length];
                            if (!DateTime.TryParseExact(check, dateFormat, CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTime logDate)) {
                                continue;
                            }
                            timeSpan = logDate - lastDate;
                            if (firstDate == DateTime.MinValue || timeSpan.TotalSeconds > seconds) {
                                firstDate = logDate;
                            }
                            lastDate = logDate;
                        }
                        logger.LogInformation("include");
                    } catch {
                        logger.LogInformation("skipped '{FileInfo}'", fileInfo.FullName);
                    }
                }
            }
        }
    }

}