using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Reflection;

class Program
{
    static void Main()
    {
        {
            string boundary = "abc_" + DateTime.UtcNow.ToString("yyyy-MM-dd-HH-mm-ss-fff") + "_xyz";
            string strExeFilePath = Assembly.GetExecutingAssembly().Location;
            string startupPath = Path.GetDirectoryName(strExeFilePath);
            string outputPath = Path.Combine(startupPath, boundary);
            Console.OutputEncoding = System.Text.Encoding.Unicode;
            Console.InputEncoding = System.Text.Encoding.Unicode;

            //PDM vault destination
            Console.WriteLine("Enter the destination folder path in your PDM vault that begins backslash(\\) where file(s) should be uploaded");
            Console.WriteLine("Or enter PDM vault root path - backslash(\\) symbol. Do not provide the full path name of the local view folder");
            string folderPath = Console.ReadLine();
            if (folderPath.Contains(":"))
            {
                Console.WriteLine("Error: The path contains the colon(:) symbol. Exiting program. Please provide PDM vault's path instead of the full path of the local view folder. Enter backslash(\\) if the PDM vault's root path");
                Environment.Exit(1);
            }

            //List of files to be uploaded
            Console.WriteLine("Enter the file path(s) (separated by semicolon if more than one). Do not wrap paths in double quotes:");
            string filesInput = Console.ReadLine();
            if (filesInput.Contains("\""))
            {
                Console.WriteLine("Error: The file path(s) contains the double quote(\") symbol. Exiting program. Please provide the semicolon delimited file paths without wrapping them in double quotes");
                Environment.Exit(1);
            }
            List<string> files = filesInput.Split(';').Select(file => file.Trim()).ToList();

            // Call the method to generate the binary file
            GenerateBinaryFile(folderPath, files, outputPath, boundary);

            Console.WriteLine($"Now you can upload the binary file(s) to your PDM vault");
            Console.WriteLine($"Step 1: Attach the just generated output file to the binary Body of your Postman HTTP request");
            Console.WriteLine($"Step 2: Replace the Postman HTTP request Header 'Content-Type' with this value:");
            Console.WriteLine($"     multipart/form-data; boundary=\"{boundary}\"");
            Console.WriteLine($"Step 3: Modify other items in your Postman HTTP request (i.e. Bearer token, Headers, etc) and send request");
            Console.WriteLine("     Press any key to exit...");
            Console.ReadKey();
        }

    }

    public static void GenerateBinaryFile(string folderPath, List<string> files, string outputPath, string boundary)
    {
        using (var content = new MultipartFormDataContent(boundary))
        {
            foreach (var file in files)
            {
                if (!File.Exists(file))
                {
                    Console.WriteLine($"Error: File '{file}' does not exist. Exiting program.");
                    Environment.Exit(1);
                }
                var fileContent = CreateFileContent(file, folderPath);
                content.Add(fileContent);
            }

            // Save the binary content to a file
            var binaryContent = content.ReadAsByteArrayAsync().Result;
            File.WriteAllBytes(outputPath, binaryContent);

            Console.WriteLine($"Binary content saved to '{outputPath}' file");
            Console.WriteLine("");
        }
    }


    private static MultipartFormDataContent CreateFileContent(string file, string folderPath)
    {
        var content = new MultipartFormDataContent
            {
                new FormUrlEncodedContent(new List<KeyValuePair<string, string>>(3)
                {
                    new KeyValuePair<string, string>("CreationDate",
                        System.IO.File.GetCreationTimeUtc(file).ToString("O")),
                    new KeyValuePair<string, string>("ModificationDate",
                        System.IO.File.GetLastWriteTimeUtc(file).ToString("O")),
                    new KeyValuePair<string, string>("PathInVault", $"{folderPath}")
                })
            };
        var streamContent = new StreamContent(System.IO.File.OpenRead(file));
        content.Add(streamContent, "file", file);
        return content;
    }

}