import { NextRequest, NextResponse } from 'next/server';
// TRANSCODING DISABLED: These imports are no longer needed
// import { getDatabase } from '@/db';
// import fs from 'fs';
// import { spawn } from 'child_process';
// import { Readable } from 'stream';
// import { ffmpegRegistry } from '@/lib/ffmpeg/process-registry';

// TRANSCODING DISABLED: Request tracking no longer needed
// const activeRequests = new Map<string, Promise<Response>>();

export async function HEAD(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  // TRANSCODING DISABLED: Return 410 Gone with local player guidance
  try {
    const { id } = await params;
    
    return NextResponse.json({ 
      error: 'Transcoding is disabled. This format requires a local video player.',
      suggestedPlayers: ['VLC Media Player', 'Elmedia Player', 'PotPlayer'],
      directStreamUrl: `/api/stream/direct/${id}`,
      helpUrl: '/help/local-players',
      status: 'transcoding-disabled'
    }, { status: 410 }); // 410 Gone
  } catch (error) {
    console.error('HEAD request error:', error);
    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
  }
}

export async function OPTIONS(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  // TRANSCODING DISABLED: Return 410 Gone for OPTIONS as well
  return new Response(null, {
    status: 410, // Gone
    headers: {
      'Access-Control-Allow-Origin': '*',
      'Access-Control-Allow-Methods': 'GET, HEAD, OPTIONS',
      'Access-Control-Allow-Headers': 'Content-Type, Range',
      'Access-Control-Max-Age': '86400',
      'X-Status': 'transcoding-disabled',
    },
  });
}

export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  // TRANSCODING DISABLED: Return 410 Gone with comprehensive local player guidance
  try {
    const { id } = await params;
    
    return NextResponse.json({ 
      error: 'Transcoding is disabled. This format requires a local video player.',
      message: 'This video format is not supported for direct browser playback. Please use a local video player application.',
      suggestedPlayers: [
        { name: 'VLC Media Player', id: 'vlc', platforms: ['Windows', 'macOS', 'Linux'], url: 'https://www.videolan.org/vlc/' },
        { name: 'IINA', id: 'iina', platforms: ['macOS'], url: 'https://iina.io/' },
        { name: 'Elmedia Player', id: 'elmedia', platforms: ['macOS'], url: 'https://www.elmedia-video-player.com/' },
        { name: 'PotPlayer', id: 'potplayer', platforms: ['Windows'], url: 'https://potplayer.daum.net/' }
      ],
      directStreamUrl: `/api/stream/direct/${id}`,
      streamInfo: {
        supportsRangeRequests: true,
        contentType: 'video/*',
        authentication: 'none'
      },
      action: 'use-local-player',
      helpUrl: '/help/local-players',
      status: 'transcoding-disabled',
      alternative: 'direct-stream'
    }, { status: 410 }); // 410 Gone
  } catch (error) {
    console.error('Transcoding API error:', error);
    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
  }
}

// TRANSCODING DISABLED: Comment out transcoding functionality
// This function is no longer used but kept for reference during transition
/*
async function createTranscodeStream(
  id: string,
  filePath: string, 
  seekTime: number,
  quality: string,
  duration: number,
  settings: { width: number, height: number, bitrate: string }
): Promise<Response> {
  // Original transcoding logic disabled
  // See git history for implementation details
  throw new Error('Transcoding is disabled. Use local player instead.');
}
*/

// TRANSCODING DISABLED: Cleanup function no longer needed
export async function DELETE(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  // TRANSCODING DISABLED: Return 410 Gone - no processes to clean up
  try {
    const { id } = await params;
    
    return NextResponse.json({ 
      error: 'Transcoding cleanup is disabled. No processes to terminate.',
      status: 'transcoding-disabled',
      message: 'Transcoding functionality has been removed. Use local video players instead.'
    }, { status: 410 }); // 410 Gone
  } catch (error) {
    console.error('Cleanup API error:', error);
    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
  }
}