"use client";

import { useState, useCallback } from "react";
import { motion } from "framer-motion";
import { Music, Volume2 } from "lucide-react";
import { FileUploader } from "@/components/tools/FileUploader";
import { ProgressBar } from "@/components/tools/ProgressBar";
import { ResultPreview } from "@/components/tools/ResultPreview";
import { ConfigPanel, type ConfigOption } from "@/components/tools/ConfigPanel";
import { Button } from "@/components/ui/button";
import { useUploadStore } from "@/store/uploadStore";
import { generateId } from "@/lib/utils";
import type { UploadedFile, ProcessedFile, AudioCompressConfig } from "@/types";

const audioAccept = {
  "audio/*": [".mp3", ".wav", ".ogg", ".aac", ".flac", ".m4a"],
};

const defaultConfig: AudioCompressConfig = {
  bitrate: 128,
  format: "mp3",
  sampleRate: 44100,
  channels: 2,
};

const configOptions: ConfigOption[] = [
  {
    id: "bitrate",
    type: "select",
    label: "Bitrate",
    description: "Higher bitrate = better quality, larger file",
    value: defaultConfig.bitrate,
    options: [
      { label: "64 kbps", value: 64 },
      { label: "128 kbps", value: 128 },
      { label: "192 kbps", value: 192 },
      { label: "256 kbps", value: 256 },
      { label: "320 kbps", value: 320 },
    ],
  },
  {
    id: "format",
    type: "select",
    label: "Output Format",
    description: "Target audio format",
    value: defaultConfig.format,
    options: [
      { label: "MP3", value: "mp3" },
      { label: "AAC", value: "aac" },
      { label: "OGG", value: "ogg" },
      { label: "FLAC", value: "flac" },
    ],
  },
  {
    id: "sampleRate",
    type: "select",
    label: "Sample Rate",
    description: "Audio sample rate in Hz",
    value: defaultConfig.sampleRate,
    options: [
      { label: "44.1 kHz", value: 44100 },
      { label: "48 kHz", value: 48000 },
    ],
  },
  {
    id: "channels",
    type: "radio",
    label: "Channels",
    description: "Audio channels",
    value: defaultConfig.channels,
    options: [
      { label: "Stereo (2 channels)", value: 2 },
      { label: "Mono (1 channel)", value: 1 },
    ],
  },
];

export default function AudioCompressPage() {
  const { files, addFile, removeFile, clearFiles, processingStatus, setProcessingStatus } =
    useUploadStore();

  const [config, setConfig] = useState<AudioCompressConfig>(defaultConfig);
  const [processedFiles, setProcessedFiles] = useState<ProcessedFile[]>([]);

  const handleFilesDrop = useCallback(
    (acceptedFiles: File[]) => {
      const newFiles: UploadedFile[] = acceptedFiles.map((file) => ({
        id: generateId(),
        file,
        name: file.name,
        size: file.size,
        type: file.type,
        uploadedAt: new Date(),
      }));

      newFiles.forEach((file) => addFile(file));
    },
    [addFile]
  );

  const handleConfigChange = (id: string, value: any) => {
    setConfig((prev) => ({ ...prev, [id]: value }));
  };

  const handleResetConfig = () => {
    setConfig(defaultConfig);
  };

  const handleProcess = async () => {
    if (files.length === 0) return;

    setProcessingStatus({
      status: "uploading",
      progress: 0,
      message: "Uploading audio...",
    });

    try {
      // Simulate upload
      for (let i = 0; i <= 100; i += 10) {
        await new Promise((resolve) => setTimeout(resolve, 50));
        setProcessingStatus({
          status: "uploading",
          progress: i,
          message: `Uploading... ${i}%`,
        });
      }

      setProcessingStatus({
        status: "processing",
        progress: 0,
        message: "Compressing audio...",
      });

      // Simulate processing
      for (let i = 0; i <= 100; i += 5) {
        await new Promise((resolve) => setTimeout(resolve, 150));
        setProcessingStatus({
          status: "processing",
          progress: i,
          message: `Compressing... ${i}%`,
        });
      }

      // Simulate completion
      const results: ProcessedFile[] = files.map((file) => ({
        id: generateId(),
        originalFile: file,
        processedUrl: "#",
        metadata: {
          format: config.format,
          bitrate: config.bitrate,
          sampleRate: config.sampleRate,
          compressionRatio: Math.floor(Math.random() * 50) + 50, // Simulated 50-100%
        },
        createdAt: new Date(),
      }));

      setProcessedFiles(results);
      clearFiles();

      setProcessingStatus({
        status: "completed",
        progress: 100,
        message: "Compression complete!",
      });
    } catch (error) {
      setProcessingStatus({
        status: "failed",
        progress: 0,
        message: "Compression failed",
        error: error instanceof Error ? error.message : "Unknown error",
      });
    }
  };

  const handleDownload = (fileId: string) => {
    console.log("Downloading file:", fileId);
  };

  const canProcess = files.length > 0 && processingStatus.status !== "processing";

  return (
    <div className="p-6">
      <motion.div
        initial={{ opacity: 0, y: 20 }}
        animate={{ opacity: 1, y: 0 }}
      >
        <div className="mb-8">
          <div className="flex items-center gap-3">
            <div className="flex h-12 w-12 items-center justify-center rounded-lg bg-primary/10">
              <Music className="h-6 w-6 text-primary" />
            </div>
            <div>
              <h1 className="text-3xl font-bold">Audio Compression</h1>
              <p className="text-muted-foreground">
                Compress and convert audio files with quality control
              </p>
            </div>
          </div>
        </div>

        <div className="grid gap-6 lg:grid-cols-2">
          <div className="space-y-6">
            <FileUploader
              files={files}
              onFilesDrop={handleFilesDrop}
              onRemoveFile={removeFile}
              accept={audioAccept}
              maxSize={100 * 1024 * 1024} // 100MB
              maxFiles={10}
              disabled={processingStatus.status === "processing"}
            />

            <ConfigPanel
              title="Audio Settings"
              description="Configure compression parameters"
              options={configOptions.map((opt) => ({
                ...opt,
                value: config[opt.id as keyof AudioCompressConfig],
              }))}
              onChange={handleConfigChange}
              onReset={handleResetConfig}
            />

            {canProcess && (
              <Button onClick={handleProcess} size="lg" className="w-full">
                <Volume2 className="mr-2 h-4 w-4" />
                Compress Audio
              </Button>
            )}
          </div>

          <div className="space-y-6">
            {processingStatus.status !== "idle" && (
              <ProgressBar progress={processingStatus} />
            )}

            {processedFiles.length > 0 && (
              <ResultPreview results={processedFiles} onDownload={handleDownload} />
            )}

            <div className="rounded-lg border border-border/40 bg-card/50 p-6">
              <h3 className="mb-3 font-semibold">Supported Formats</h3>
              <div className="grid grid-cols-2 gap-3 text-sm text-muted-foreground">
                <div>
                  <p className="font-medium text-foreground">Input</p>
                  <p>MP3, WAV, OGG, AAC, FLAC, M4A</p>
                </div>
                <div>
                  <p className="font-medium text-foreground">Output</p>
                  <p>MP3, AAC, OGG, FLAC</p>
                </div>
              </div>
            </div>
          </div>
        </div>
      </motion.div>
    </div>
  );
}