"use client";

import { useState } from "react";
import { FileAudio, X, Music } from "lucide-react";
import { AudioUpload } from "./AudioUpload";
import { StemSeparationPanel } from "./StemSeparationPanel";
import { MIDIExtractionPanel } from "./MIDIExtractionPanel";
import { AgenticWorkflowPanel } from "./AgenticWorkflowPanel";
import { MusicGenerator } from "./MusicGenerator";
import { useAudioStore } from "@/store/audio-store";

export function AudioProcessingPanel() {
  const loadGeneratedMIDI = useAudioStore((state) => state.loadGeneratedMIDI);
  const [uploadedFile, setUploadedFile] = useState<File | null>(null);
  const [activeTab, setActiveTab] = useState<"upload" | "workflow" | "stems" | "midi" | "music">(
    "upload"
  );

  const handleFileUploaded = (file: File, audioBuffer: AudioBuffer) => {
    setUploadedFile(file);
    setActiveTab("workflow"); // Switch to workflow tab after upload
  };

  const tabs = [
    { id: "upload" as const, label: "Upload", icon: FileAudio },
    { id: "workflow" as const, label: "Workflow", icon: FileAudio },
    { id: "stems" as const, label: "Stems", icon: FileAudio },
    { id: "midi" as const, label: "MIDI", icon: FileAudio },
    { id: "music" as const, label: "Generate", icon: Music },
  ];

  return (
    <div className="w-full h-full flex flex-col bg-gray-950">
      {/* Tab Navigation */}
      <div className="flex border-b border-gray-800">
        {tabs.map((tab) => {
          const Icon = tab.icon;
          return (
            <button
              key={tab.id}
              onClick={() => setActiveTab(tab.id)}
              className={`
                flex items-center gap-2 px-4 py-3 text-sm font-medium transition-colors
                ${
                  activeTab === tab.id
                    ? "text-blue-500 border-b-2 border-blue-500"
                    : "text-gray-400 hover:text-gray-300"
                }
              `}
            >
              <Icon className="w-4 h-4" />
              {tab.label}
            </button>
          );
        })}
      </div>

      {/* Content */}
      <div className="flex-1 overflow-y-auto p-4">
        {activeTab === "upload" && (
          <div className="space-y-4">
            <div className="flex items-center justify-between">
              <h2 className="text-xl font-semibold text-white">Audio Upload</h2>
              {uploadedFile && (
                <button
                  onClick={() => setUploadedFile(null)}
                  className="text-gray-400 hover:text-white"
                >
                  <X className="w-5 h-5" />
                </button>
              )}
            </div>
            <AudioUpload
              onFileUploaded={handleFileUploaded}
              maxSize={200}
            />
            {uploadedFile && (
              <div className="bg-gray-900 rounded-lg p-4">
                <p className="text-sm text-gray-400">Uploaded:</p>
                <p className="text-white font-medium">{uploadedFile.name}</p>
                <p className="text-xs text-gray-500 mt-1">
                  {(uploadedFile.size / (1024 * 1024)).toFixed(2)} MB
                </p>
              </div>
            )}
          </div>
        )}

        {activeTab === "workflow" && (
          <div className="space-y-4">
            <h2 className="text-xl font-semibold text-white">Agentic Workflow</h2>
            <AgenticWorkflowPanel
              audioFile={uploadedFile}
              onWorkflowComplete={(result) => {
                console.log("Workflow complete:", result);
              }}
            />
          </div>
        )}

        {activeTab === "stems" && (
          <div className="space-y-4">
            <h2 className="text-xl font-semibold text-white">Stem Separation</h2>
            <StemSeparationPanel
              audioFile={uploadedFile}
              onStemsSeparated={(result) => {
                console.log("Stems separated:", result);
              }}
            />
          </div>
        )}

        {activeTab === "midi" && (
          <div className="space-y-4">
            <h2 className="text-xl font-semibold text-white">MIDI Extraction</h2>
            <MIDIExtractionPanel
              audioFile={uploadedFile}
              onMIDIExtracted={(result) => {
                console.log("MIDI extracted:", result);
              }}
            />
          </div>
        )}

        {activeTab === "music" && (
          <div className="space-y-4">
            <h2 className="text-xl font-semibold text-white">AI Music Generation</h2>
            <MusicGenerator
              onTrackGenerated={async (midiFile, audioFile) => {
                console.log("Music generated:", { midiFile, audioFile });

                try {
                  if (midiFile) {
                    const trackId = await loadGeneratedMIDI(midiFile, "AI Generated Music");
                    console.log("Added generated MIDI to track:", trackId);
                  }
                } catch (error) {
                  console.error("Failed to load generated MIDI:", error);
                }
              }}
            />
          </div>
        )}
      </div>
    </div>
  );
}