const axios = require("axios")

const headers = {
  "User-Agent": "Mozilla/5.0"
}

async function nhdl(id) {
  try {
    const api = `https://nhentai.net/api/gallery/${id}`
    const { data } = await axios.get(api, { headers })

    const mediaId = data.media_id
    const pages = data.images.pages
    const images = []

    const extMap = {
      j: "jpg",
      p: "png",
      g: "gif",
      w: "webp"
    }

    pages.forEach((page, i) => {
      const type = page.t
      const ext = extMap[type] || "jpg"
      const url = `https://i.nhentai.net/galleries/${mediaId}/${i + 1}.${ext}`
      images.push(url)
    })

    if (images.length === 0) throw new Error("No images found")

    return images
  } catch (e) {
    throw new Error(e.message)
  }
}

module.exports = { nhdl }