import Vditor from 'vditor'
import 'vditor/dist/index.css'
import { API_BASE_URL } from '../main'
import { getToken, authState } from './auth'
import { searchUsers, fetchFollowings, fetchAdmins } from './user'

export function getEditorTheme() {
  return document.documentElement.dataset.theme === 'dark' ? 'dark' : 'classic'
}

export function getPreviewTheme() {
  return document.documentElement.dataset.theme === 'dark' ? 'dark' : 'light'
}

export function createVditor(editorId, options = {}) {
  const {
    placeholder = '',
    preview = {},
    input,
    after
  } = options

  const fetchMentions = async (value) => {
    if (!value) {
      const [followings, admins] = await Promise.all([
        fetchFollowings(authState.username),
        fetchAdmins()
      ])
      const combined = [...followings, ...admins]
      const seen = new Set()
      return combined.filter(u => {
        if (seen.has(u.id)) return false
        seen.add(u.id)
        return true
      })
    }
    return searchUsers(value)
  }

  let vditor
  vditor = new Vditor(editorId, {
    placeholder,
    height: 'auto',
    theme: getEditorTheme(),
    preview: Object.assign({ theme: { current: getPreviewTheme() } }, preview),
    hint: {
      extend: [
        {
          key: '@',
          hint: async (key) => {
            const list = await fetchMentions(key)
            return list.map(u => ({
              value: `@[${u.username}]`,
              html: `<img src="${u.avatar}" /> @${u.username}`
            }))
          },
        },
      ],
    },
    cdn: 'https://openisle-1307107697.cos.ap-guangzhou.myqcloud.com/assert/vditor',
    toolbar: [
      'emoji',
      'bold',
      'italic',
      'strike',
      '|',
      'list',
      'line',
      'quote',
      'code',
      'inline-code',
      '|',
      'undo',
      'redo',
      '|',
      'link',
      'upload'
    ],
    upload: {
      accept: 'image/*,video/*',
      multiple: false,
      handler: async (files) => {
        const file = files[0]
        const res = await fetch(`${API_BASE_URL}/api/upload/presign?filename=${encodeURIComponent(file.name)}`, {
          headers: { Authorization: `Bearer ${getToken()}` }
        })
        if (!res.ok) return '获取上传地址失败'
        const info = await res.json()
        const put = await fetch(info.uploadUrl, { method: 'PUT', body: file })
        if (!put.ok) return '上传失败'

        const ext = file.name.split('.').pop().toLowerCase()
        const imageExts = ['apng','bmp','gif','ico','cur','jpg','jpeg','jfif','pjp','pjpeg','png','svg','webp']
        const audioExts = ['wav','mp3','ogg']
        let md
        if (imageExts.includes(ext)) {
          md = `![${file.name}](${info.fileUrl})`
        } else if (audioExts.includes(ext)) {
          md = `<audio controls="controls" src="${info.fileUrl}"></audio>`
        } else {
          md = `[${file.name}](${info.fileUrl})`
        }
        vditor.insertValue(md + '\n')
        return null
      }
    },
    // upload: {
    //   fieldName: 'file',
    //   url: `${API_BASE_URL}/api/upload`,
    //   accept: 'image/*,video/*',
    //   multiple: false,
    //   headers: { Authorization: `Bearer ${getToken()}` },
    //   format(files, responseText) {
    //     const res = JSON.parse(responseText)
    //     if (res.code === 0) {
    //       return JSON.stringify({
    //         code: 0,
    //         msg: '',
    //         data: {
    //           errFiles: [],
    //           succMap: { [files[0].name]: res.data.url }
    //         }
    //       })
    //     } else {
    //       return JSON.stringify({
    //         code: 1,
    //         msg: '上传失败',
    //         data: { errFiles: files.map(f => f.name), succMap: {} }
    //       })
    //     }
    //   }
    // },
    toolbarConfig: { pin: true },
    cache: { enable: false },
    input,
    after
  })
  return vditor
}