/**
 * @fileoverview Modul Downloader & Scraper TikTok Tanpa Watermark (TikWM API).
 *
 * Mengimplementasikan antarmuka klien API TikWM untuk mengekstrak metadata, video tanpa watermark (HD/SD),
 * format gambar multi-slide, serta audio latar (MP3) dari video TikTok.
 * Didukung fitur pencarian video berbasis kata kunci dan feed trending global.
 *
 * @module scrapers/tiktok
 * @version 2.0.0
 * @author kyiov
 * @license MIT
 */

import { pathToFileURL } from 'node:url'

/**
 * @typedef {Object} TikTokAuthor
 * @property {string} id - Pengenal unik pembuat konten
 * @property {string} unique_id - Username handle TikTok (@username)
 * @property {string} nickname - Nama tampilan profil
 * @property {string} avatar - Tautan foto profil
 */

/**
 * @typedef {Object} TikTokMedia
 * @property {'video'|'image'} type - Jenis media konten
 * @property {number} [duration] - Durasi video dalam detik
 * @property {string} [play] - URL unduhan video tanpa watermark
 * @property {string} [hdplay] - URL unduhan video kualitas HD tanpa watermark
 * @property {string} [wmplay] - URL unduhan video dengan watermark asli
 * @property {string[]} [images] - Daftar tautan gambar untuk post slide
 */

/**
 * @typedef {Object} TikTokDownloadResult
 * @property {string} id - ID unik video TikTok
 * @property {string} title - Judul atau takarir (caption) video
 * @property {string} cover - URL gambar sampul (thumbnail)
 * @property {TikTokMedia} media - Objek aset media (video/gambar)
 * @property {TikTokAuthor} author - Informasi pembuat konten
 * @property {Object} music - Metadata musik/audio latar
 * @property {number} views - Jumlah penayangan
 * @property {number} likes - Jumlah suka
 * @property {number} comments - Jumlah komentar
 * @property {number} shares - Jumlah pembagian
 */

export class TikWMScraper {
  /**
   * Menginisialisasi klien TikWM dengan base URL dan konfigurasi header default.
   */
  constructor() {
    this.baseUrl = 'https://tikwm.com'
    this.headers = {
      'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
      'User-Agent':
        'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36',
      'Accept': 'application/json, text/javascript, */*; q=0.01'
    }
  }

  /**
   * Mengunduh metadata video TikTok beserta tautan media tanpa watermark.
   *
   * @param {string} url - Tautan URL postingan TikTok lengkap atau format pendek (vt.tiktok.com)
   * @returns {Promise<TikTokDownloadResult>} Metadata lengkap dan tautan download media
   * @throws {Error} Jika URL tidak valid atau video gagal diekstrak
   */
  async download(url) {
    if (!url) throw new Error('Parameter URL video TikTok wajib disertakan.')

    const params = new URLSearchParams({ url, hd: '1' })
    const res = await fetch(`${this.baseUrl}/api/`, {
      method: 'POST',
      headers: this.headers,
      body: params
    })

    if (!res.ok) throw new Error(`HTTP Error: ${res.status}`)
    const json = await res.json()

    if (json.code !== 0 || !json.data) {
      throw new Error(json.msg || 'Gagal mengekstrak data video dari URL tersebut.')
    }

    const data = json.data
    const isImage = data.duration === 0 && Array.isArray(data.images) && data.images.length > 0

    return {
      id: data.id,
      title: data.title || '',
      cover: data.cover || '',
      media: isImage
        ? {
            type: 'image',
            images: data.images,
            image_count: data.images.length
          }
        : {
            type: 'video',
            duration: data.duration,
            play: data.play,
            hdplay: data.hdplay || data.play,
            wmplay: data.wmplay,
            size: data.size,
            hd_size: data.hd_size
          },
      author: {
        id: data.author?.id,
        unique_id: data.author?.unique_id,
        nickname: data.author?.nickname,
        avatar: data.author?.avatar
      },
      music: data.music_info || {},
      views: data.play_count || 0,
      likes: data.digg_count || 0,
      comments: data.comment_count || 0,
      shares: data.share_count || 0,
      created_at: data.create_time
    }
  }

  /**
   * Mencari video TikTok berdasarkan kata kunci tertentu.
   *
   * @param {string} keywords - Kata kunci penelusuran video
   * @param {number} [count=10] - Jumlah video maksimum yang ingin diambil
   * @returns {Promise<Array<Object>>} Daftar video yang cocok dengan kata kunci
   * @throws {Error} Jika kata kunci kosong atau penelusuran gagal
   */
  async search(keywords, count = 10) {
    if (!keywords) throw new Error('Kata kunci pencarian wajib disertakan.')

    const params = new URLSearchParams({
      keywords,
      count: String(count),
      cursor: '0',
      hd: '1'
    })

    const res = await fetch(`${this.baseUrl}/api/feed/search/`, {
      method: 'POST',
      headers: this.headers,
      body: params
    })

    if (!res.ok) throw new Error(`HTTP Error: ${res.status}`)
    const json = await res.json()

    if (json.code !== 0 || !json.data?.videos) {
      throw new Error(json.msg || 'Tidak ditemukan video yang sesuai dengan kata kunci.')
    }

    return json.data.videos.map((item) => ({
      id: item.video_id,
      title: item.title,
      cover: item.cover,
      play: item.play,
      duration: item.duration,
      author: {
        id: item.author?.id,
        unique_id: item.author?.unique_id,
        nickname: item.author?.nickname,
        avatar: item.author?.avatar
      },
      views: item.play_count,
      likes: item.digg_count
    }))
  }
}

export const tikwm = new TikWMScraper()
export default tikwm

// Eksekusi mandiri untuk pengujian langsung tanpa argumen CLI
if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) {
  try {
    console.log('Menguji pencarian video TikTok...')
    const searchResults = await tikwm.search('nature', 2)
    console.log('Hasil Pencarian:', JSON.stringify(searchResults, null, 2))

    if (searchResults.length > 0) {
      const first = searchResults[0]
      const videoUrl = `https://www.tiktok.com/@${first.author.unique_id}/video/${first.id}`
      console.log(`Menguji ekstraksi video langsung: ${videoUrl}`)
      const downloadData = await tikwm.download(videoUrl)
      console.log('Hasil Ekstraksi Video:', {
        id: downloadData.id,
        title: downloadData.title,
        play: downloadData.media.play,
        author: downloadData.author.unique_id
      })
    }
  } catch (err) {
    console.error('Galat eksekusi TikWM:', err.message || err)
  }
}