using System.Collections.Concurrent;
using System.Data;
using System.Diagnostics;
using System.Net;
using System.Reflection.Metadata.Ecma335;
using System.Runtime.CompilerServices;
using System.Text;
using System.Text.RegularExpressions;
using System.Timers;
using Newtonsoft.Json;


namespace placeholdervo
{
    public partial class Program
    {

        [GeneratedRegex("^[^a-zA-Z0-9'\"]")]
        private static partial Regex TextLine();
        public static Config conf;
        private static string workingDir = "./";
        
        private static ConcurrentQueue<string> scriptFragmentFiles = new ConcurrentQueue<string>();
        private static CancellationToken scriptFileCancellationToken;

        private static async void webcall()
        {
            var hc = new HttpClient(){ BaseAddress = new Uri(conf.speech_service)};
            while(true)
            {
                while(!scriptFragmentFiles.IsEmpty)
                {
                    string scriptFragment;
                    scriptFragmentFiles.TryDequeue(out scriptFragment);
                    if(scriptFragment == null) continue;
                    Console.WriteLine(scriptFragment);

                    HttpContent fileStreamContent = new StreamContent(File.OpenRead(scriptFragment));
                    using (var formData = new MultipartFormDataContent())
                    {
                        formData.Add(fileStreamContent, "file1", "file1");
            
                        var response = await hc.PostAsync("/speak", formData);
                        if (!response.IsSuccessStatusCode)
                        {
                            Console.Error.WriteLine($"{response.StatusCode} - {response.ReasonPhrase} - {await response.Content.ReadAsStringAsync()}");
                        }
                        else
                        {
                            var resp = string.Join(", ", JsonConvert.DeserializeObject<string[]>(await response.Content.ReadAsStringAsync()));
                            Console.WriteLine($"success; {resp}.");
                            if(resp != null)
                            {
                                scriptFragmentVoiceFiles[resp] = scriptFragment;
                                Console.WriteLine("Ditching script fragment file.");
                                File.Delete(scriptFragment);
                            }
                        }
                    }
                    System.Threading.Thread.Sleep(TimeSpan.FromSeconds(1));
                }

                if(scriptFileCancellationToken.IsCancellationRequested && scriptFragmentFiles.IsEmpty)
                {
                    return;
                }
            }
        }

        private static ConcurrentDictionary<string, string> scriptFragmentVoiceFiles = new ConcurrentDictionary<string, string>();

        private static async void filePickup()
        {
            while(true)
            {
                while(!scriptFragmentVoiceFiles.IsEmpty)
                {
                    var files = Directory.GetFiles(conf.sync_dropoff);
                    Console.WriteLine($"files listed: {string.Join(", ", files)}");
                    Console.WriteLine($"hoping for: {string.Join(", ", scriptFragmentVoiceFiles.Keys)}");
                    // Console.WriteLine($"sanity check: first listed file: {Path.GetFileName(files.FirstOrDefault())}");
                    // Console.WriteLine($"sanity check: first key: {scriptFragmentVoiceFiles.Keys.FirstOrDefault()}");
                    // Console.WriteLine($"sanity check: first value: {scriptFragmentVoiceFiles[scriptFragmentVoiceFiles.Keys.FirstOrDefault()]}");
                    var audioFile = files.FirstOrDefault(f => scriptFragmentVoiceFiles.ContainsKey(Path.GetFileName(f)));
                    if(!string.IsNullOrWhiteSpace(audioFile))
                    {
                        Console.WriteLine($"found {audioFile}");
                        try
                        {
                            var bareAudioFile = Path.GetFileName(audioFile);
                            var destFile = scriptFragmentVoiceFiles[bareAudioFile];
                            destFile = Path.GetFileNameWithoutExtension(destFile) + ".wav";
                            destFile = Path.Combine(workingDir, destFile);
                            File.Move(audioFile, destFile);
                            
                            if(!scriptFragmentVoiceFiles.Remove(bareAudioFile, out string throwaway))
                            {
                                Console.WriteLine($"failed to remove {bareAudioFile}");
                            }
                        }
                        catch(Exception e)
                        {
                            Console.Error.WriteLine(e.Message);
                        }
                    }
                    System.Threading.Thread.Sleep(TimeSpan.FromSeconds(5));
                }
                if(scriptFileCancellationToken.IsCancellationRequested)
                {
                    return;
                }

                System.Threading.Thread.Sleep(TimeSpan.FromSeconds(1));
            }
        }

        public static async Task Main(string[] args)
        {
            conf = JsonConvert.DeserializeObject<Config>(
                File.ReadAllText(
                    AppDomain.CurrentDomain.BaseDirectory + "appsettings.json")) 
                ?? new Config();

            var scriptPath = args?.FirstOrDefault();
            if(string.IsNullOrWhiteSpace(scriptPath))
                scriptPath = "./script.txt";
            workingDir = Path.GetDirectoryName(scriptPath);

            var cancelSource = new CancellationTokenSource();
            scriptFileCancellationToken = cancelSource.Token;
            var apiCallThread = new Thread(new ThreadStart(webcall));
            apiCallThread.Start();
            var fileRetrieveThread = new Thread(new ThreadStart(filePickup));
            fileRetrieveThread.Start();

            var lines = File.ReadAllLines(scriptPath).Where(l => !TextLine().IsMatch(l))
                .Append("\n").Append("\n"); //pad out file so my tactic for separating doesn't fall off the end of the file
            var lineCountMagnitude = (int)Math.Log10(lines.Count());

            var runningSavedLines = new List<string>();
            var completeSavedLines = new List<string>();
            var iteration = 0;
            
            foreach(var l in lines)
            {
                if(string.IsNullOrWhiteSpace(l))
                {
                    if(runningSavedLines.Any(line => !string.IsNullOrWhiteSpace(line)))
                    {
                        ++iteration;
                        //x.ToString("D2") should format x with minimum 2 digits, padded left
                        var scriptFragment = $"script{iteration.ToString($"D{lineCountMagnitude}")}.txt";
                        File.WriteAllLines(scriptFragment, runningSavedLines);
                        scriptFragmentFiles.Enqueue(scriptFragment);
                        completeSavedLines.AddRange(runningSavedLines);
                    }
                    runningSavedLines = [];
                }
                else
                {
                    runningSavedLines.Add(l);
                }
            }
            
            var scriptStripped = $"script{0.ToString($"D{lineCountMagnitude}")}.txt";
            File.WriteAllLines(scriptStripped, completeSavedLines);
            scriptFragmentFiles.Enqueue(scriptStripped);
            cancelSource.Cancel();
            Console.WriteLine("http client \"cancelled\".");
            while(apiCallThread.ThreadState != System.Threading.ThreadState.Stopped)
            {
                Console.WriteLine("thread still running. waiting.");
                System.Threading.Thread.Sleep(TimeSpan.FromSeconds(5));
            }
            Console.WriteLine($"api call thread done ({apiCallThread.ThreadState}).");

            while(fileRetrieveThread.ThreadState != System.Threading.ThreadState.Stopped)
            {
                Console.WriteLine("fileRetrieveThread still running. waiting.");
                System.Threading.Thread.Sleep(TimeSpan.FromSeconds(5));
            }
            Console.WriteLine($"fileRetrieveThread done ({fileRetrieveThread.ThreadState}). kbai");
        }
    }
}