import { NextResponse } from 'next/server'

const RADIO_GARDEN_API = 'https://radio.garden/api'
const HEADERS = {
  'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
  'Referer': 'https://radio.garden/',
}

export async function GET(
  _request: Request,
  { params }: { params: Promise<{ channelId: string }> }
) {
  const { channelId } = await params

  try {
    // Follow the 302 redirect to get the actual stream URL
    const res = await fetch(
      `${RADIO_GARDEN_API}/ara/content/listen/${channelId}/channel.mp3`,
      {
        headers: HEADERS,
        redirect: 'manual', // Don't auto-follow — we want the Location header
        signal: AbortSignal.timeout(10000),
      }
    )

    if (res.status === 302) {
      const streamUrl = res.headers.get('location')
      if (streamUrl) {
        return NextResponse.json({ url: streamUrl })
      }
    }

    // Some stations return 301 or other redirects
    if (res.status >= 300 && res.status < 400) {
      const streamUrl = res.headers.get('location')
      if (streamUrl) {
        return NextResponse.json({ url: streamUrl })
      }
    }

    throw new Error(`Unexpected status ${res.status}`)
  } catch (error) {
    console.error(`Failed to resolve stream for ${channelId}:`, error)
    return NextResponse.json({ error: 'Failed to resolve stream URL' }, { status: 502 })
  }
}