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

namespace File_Folder_Helper.Helpers;

internal static class HelperPdfStripperWrapper
{

    private static (string?, string?) GetDestinationDirectory(List<string> args)
    {
        string? d = null;
        string? k = null;
        for (int i = 1; i < args.Count; i++)
        {
            if (args[i].Length == 2 && i + 1 < args.Count)
            {
                if (args[i][1] == 'd')
                    d = Path.GetFullPath(args[i + 1]);
                else if (args[i][1] == 'k')
                    k = args[i + 1].Trim();
                i++;
            }
        }
        return (d, k);
    }

    private static string GetGhostTextFromPDF(string ghostPCLFileName, string sourceFileNamePdf, string destinationFileName)
    {
        string result;
        if (File.Exists(destinationFileName))
            File.Delete(destinationFileName);
        //string arguments = $"-i \"{sourceFile}\" -o \"{result}\"";
        string arguments = $"-dSAFER -dBATCH -dNOPAUSE -dFIXEDMEDIA -dFitPage -dAutoRotatePages=/All -dDEVICEWIDTHPOINTS=792 -dDEVICEHEIGHTPOINTS=612 -sOutputFile=\"{destinationFileName}\" -sDEVICE=pdfwrite \"{sourceFileNamePdf}\"";
        //Process process = Process.Start(configData.LincPDFCFileName, arguments);
        Process? process = Process.Start(ghostPCLFileName, arguments);
        _ = process?.WaitForExit(30000);
        if (!File.Exists(destinationFileName))
            result = string.Empty;
        else
            result = File.ReadAllText(destinationFileName);
        return result;
    }

    private static string GetKofaxTextFromPDF(string kofaxFileName, string sourceFileNamePdf, string destinationFileName)
    {
        string result;
        if (File.Exists(destinationFileName))
            File.Delete(destinationFileName);
        string arguments = $"-inputFile\"{sourceFileNamePdf}\" -outputFile\"{destinationFileName}\" -TTIF";
        Process? process = Process.Start(kofaxFileName, arguments);
        _ = process?.WaitForExit(30000);
        if (!File.Exists(destinationFileName))
            result = string.Empty;
        else
            result = File.ReadAllText(destinationFileName);
        return result;
    }

    private static string GetTextFromPDF(string pdfTextStripperFileName, string sourceFileNamePdf, string destinationFileName)
    {
        string result;
        ProcessStartInfo processStartInfo = new(pdfTextStripperFileName, $"s \"{sourceFileNamePdf}\"")
        {
            UseShellExecute = false,
            RedirectStandardError = true,
            RedirectStandardOutput = true,
        };
        Process? process = Process.Start(processStartInfo);
        _ = process?.WaitForExit(30000);
        if (!File.Exists(destinationFileName))
            result = string.Empty;
        else
            result = File.ReadAllText(destinationFileName);
        return result;
    }

    private static void ParseSave(ILogger log, string pdfTextStripperFileName, string ghostPCLFileName, string kofaxFileName, string destinationDirectory, string[] files)
    {
        string text;
        string destinationFileName;
        if (!Directory.Exists(destinationDirectory))
            _ = Directory.CreateDirectory(destinationDirectory);
        foreach (string file in files)
        {
            destinationFileName = Path.Combine(destinationDirectory, $"{file}.txt");
            text = GetTextFromPDF(pdfTextStripperFileName, file, destinationFileName);
            if (string.IsNullOrEmpty(text))
                text = GetGhostTextFromPDF(ghostPCLFileName, file, destinationFileName);
            if (string.IsNullOrEmpty(text))
                text = GetKofaxTextFromPDF(kofaxFileName, file, destinationFileName);
            log.LogInformation("<{file}> == {length}", Path.GetFileName(file), text.Length);
        }
    }

    internal static void ParseSave(ILogger log, List<string> args)
    {
        string pdfTextStripperFileName = Path.Combine(AppContext.BaseDirectory, "PDF-Text-Stripper.exe");
        if (!File.Exists(pdfTextStripperFileName))
            log.LogInformation("exe <{pdfTextStripperFileName}> doesn't exist!", pdfTextStripperFileName);
        else
        {
            string ghostPCLFileName = Path.Combine(AppContext.BaseDirectory, "gPcl6win64.exe");
            if (!File.Exists(ghostPCLFileName))
                log.LogInformation("exe <{ghostPCLFileName}> doesn't exist!", ghostPCLFileName);
            else
            {
                string kofaxFileName = "C:/Program Files (x86)/Kofax/Power PDF 50/batchConverter.com";
                if (!File.Exists(kofaxFileName))
                    log.LogInformation("exe <{kofaxFileName}> doesn't exist!", kofaxFileName);
                else
                {
                    (string? destinationDirectory, string? _) = GetDestinationDirectory(args);
                    if (string.IsNullOrEmpty(destinationDirectory))
                        log.LogInformation("-d <{destinationDirectory}> wasn't supplied!", nameof(destinationDirectory));
                    else
                    {
                        string[] files = Directory.GetFiles(args[0], "*.pdf", SearchOption.TopDirectoryOnly);
                        if (files.Length == 0)
                            log.LogInformation("Length == {length}", files.Length);
                        else
                            ParseSave(log, pdfTextStripperFileName, ghostPCLFileName, kofaxFileName, destinationDirectory, files);
                    }
                }
            }
        }
    }

    private static void ParseStrip(ILogger log, string destinationDirectory, string key, string[] files)
    {
        string[] lines;
        string fileName;
        string[] segments;
        List<string> collection = new();
        foreach (string file in files)
        {
            lines = File.ReadAllLines(file);
            fileName = Path.GetFileName(file);
            foreach (string line in lines)
            {
                segments = line.Split(':');
                if (segments.Length < 2)
                    continue;
                if (segments[0].Trim() != key)
                    continue;
                collection.Add($"{fileName}\t{line}");
            }
            log.LogInformation("<{fileName}>", fileName);
        }
        if (collection.Count > 0)
            File.WriteAllLines(Path.Combine(destinationDirectory, $"{key}.txt"), collection);
    }

    internal static void ParseStrip(ILogger log, List<string> args)
    {
        if (DateTime.Now > new DateTime(2023, 9, 15))
            log.LogInformation("This helper was a short term helper!");
        else
        {
            (string? destinationDirectory, string? key) = GetDestinationDirectory(args);
            if (string.IsNullOrEmpty(key))
                log.LogInformation("-k <{key}> wasn't supplied!", nameof(key));
            else
            {
                string[] files = Directory.GetFiles(args[0], "*.txt", SearchOption.TopDirectoryOnly);
                if (files.Length == 0)
                    log.LogInformation("Length == {length}", files.Length);
                else
                    ParseStrip(log, args[0], key, files);
            }
        }
    }

}