using System;
using System.Diagnostics;
using System.IO;
using System.Threading.Tasks;
using Spectre.Console;
using Toak.Audio;
using Toak.Configuration;
using Toak.Api;
using Toak.Core;
using Toak.IO;

namespace Toak.Commands;

public static class ToggleCommand
{
    public static async Task ExecuteAsync(bool pipeToStdout, bool copyToClipboard, bool verbose)
    {
        Logger.Verbose = verbose;
        
        if (StateTracker.IsRecording())
        {
            var config = ConfigManager.LoadConfig();
            Notifications.PlaySound(config.StopSoundPath);
            
            if (!pipeToStdout) AnsiConsole.MarkupLine("[yellow]Stopping recording and transcribing...[/]");
            if (!pipeToStdout) Notifications.Notify("Toak", "Transcribing...");
            
            AudioRecorder.StopRecording();

            Logger.LogDebug($"Loaded configuration: LLM={config.LlmModel}, Whisper={config.WhisperModel}, Typing={config.TypingBackend}");

            if (string.IsNullOrWhiteSpace(config.GroqApiKey))
            {
                Notifications.Notify("Toak Error", "Groq API Key is not configured. Run 'toak onboard'.");
                AnsiConsole.MarkupLine("[red]Groq API Key is not configured.[/] Run 'toak onboard'.");
                return;
            }

            var groq = new GroqApiClient(config.GroqApiKey);
            var wavPath = AudioRecorder.GetWavPath();

            if (!File.Exists(wavPath) || new FileInfo(wavPath).Length == 0)
            {
                if (!pipeToStdout) Notifications.Notify("Toak", "No audio recorded.");
                return;
            }

            try
            {
                var stopWatch = Stopwatch.StartNew();

                // 1. STT
                Logger.LogDebug($"Starting STT transcription via Whisper for {wavPath}...");
                
                string transcript = string.Empty;
                
                if (!pipeToStdout)
                {
                    await AnsiConsole.Status().StartAsync("Transcribing...", async ctx => {
                        transcript = await groq.TranscribeAsync(wavPath, config.WhisperLanguage, config.WhisperModel);
                    });
                }
                else
                {
                     transcript = await groq.TranscribeAsync(wavPath, config.WhisperLanguage, config.WhisperModel);
                }

                Logger.LogDebug($"Raw transcript received: '{transcript}'");
                
                if (string.IsNullOrWhiteSpace(transcript))
                {
                    if (!pipeToStdout) Notifications.Notify("Toak", "No speech detected.");
                    return;
                }

                // 2. LLM Refinement
                var detectedSkill = Toak.Core.Skills.SkillRegistry.DetectSkill(transcript, config.ActiveSkills);
                string systemPrompt;
                if (detectedSkill != null)
                {
                    Logger.LogDebug($"Skill detected: {detectedSkill.Name}");
                    if (!pipeToStdout) Notifications.Notify("Toak Skill Detected", detectedSkill.Name);
                    systemPrompt = detectedSkill.GetSystemPrompt(transcript);
                }
                else
                {
                    systemPrompt = PromptBuilder.BuildPrompt(config);
                }

                bool isExecutionSkill = detectedSkill != null && detectedSkill.HandlesExecution;

                // 3. Output
                if (isExecutionSkill || pipeToStdout || copyToClipboard)
                {
                    Logger.LogDebug("Starting LLM text refinement (synchronous)...");
                    
                    string finalText = string.Empty;
                    if (!pipeToStdout) {
                        await AnsiConsole.Status().StartAsync("Refining text...", async ctx => {
                            finalText = await groq.RefineTextAsync(transcript, systemPrompt, config.LlmModel);
                        });
                    } else {
                        finalText = await groq.RefineTextAsync(transcript, systemPrompt, config.LlmModel);
                    }

                    Logger.LogDebug($"Refined text received: '{finalText}'");
                    if (string.IsNullOrWhiteSpace(finalText))
                    {
                        if (!pipeToStdout) Notifications.Notify("Toak", "Dropped short or empty audio.");
                        return;
                    }
                    
                    if (isExecutionSkill)
                    {
                        detectedSkill!.Execute(finalText);
                        stopWatch.Stop();
                        Notifications.Notify("Toak", $"Skill executed in {stopWatch.ElapsedMilliseconds}ms");
                    }
                    else if (pipeToStdout)
                    {
                        Console.WriteLine(finalText);
                    }
                    else
                    {
                        ClipboardManager.Copy(finalText);
                        stopWatch.Stop();
                        Notifications.Notify("Toak", $"Copied to clipboard in {stopWatch.ElapsedMilliseconds}ms");
                    }
                }
                else
                {
                    Logger.LogDebug("Starting LLM text refinement (streaming)...");
                    var tokenStream = groq.RefineTextStreamAsync(transcript, systemPrompt, config.LlmModel);
                    Logger.LogDebug("Starting to inject text...");
                    await TextInjector.InjectStreamAsync(tokenStream, config.TypingBackend);
                    stopWatch.Stop();
                    Notifications.Notify("Toak", $"Done in {stopWatch.ElapsedMilliseconds}ms");
                }
            }
            catch (Exception ex)
            {
                if (!pipeToStdout) Notifications.Notify("Toak Error", ex.Message);
                if (!pipeToStdout) AnsiConsole.MarkupLine($"[red]Error:[/] {ex.Message}");
            }
            finally
            {
                if (File.Exists(wavPath)) File.Delete(wavPath);
            }
        }
        else
        {
            // Start recording
            if (!pipeToStdout) AnsiConsole.MarkupLine("[green]Starting recording...[/]");
            var config = ConfigManager.LoadConfig();
            Notifications.PlaySound(config.StartSoundPath);
            AudioRecorder.StartRecording();
        }
    }
}