// 图片显示解析回归：文档里的相对路径图片在编辑区经 NodeView 读成 data URL 显示；
// 文档内容（序列化）保持相对路径不变。upload 插件以 instanceof 把关事件类型，
// jsdom 缺 ClipboardEvent/DragEvent 全局，这里垫上。
import { describe, it, expect } from 'vitest'
import { createMarkdownEditor, getMarkdown } from '../src/editor/editor'
import { editorViewCtx } from '@milkdown/kit/core'

class FakeClipboardEvent extends Event {
  clipboardData: unknown
  constructor(type: string, init?: { clipboardData?: unknown }) {
    super(type, { bubbles: true, cancelable: true })
    this.clipboardData = init?.clipboardData
  }
}
;(globalThis as Record<string, unknown>).ClipboardEvent = FakeClipboardEvent
;(globalThis as Record<string, unknown>).DragEvent = class extends Event {}

const tick = (ms = 40) => new Promise((r) => setTimeout(r, ms))

describe('图片显示解析', () => {
  it('相对路径图片在 DOM 里被换成 data URL，文档仍是相对路径', async () => {
    const host = document.createElement('div')
    document.body.appendChild(host)
    const editor = createMarkdownEditor(host, '看图 ![截图](doc.assets/a.png) 完', {}, {
      resolveImageDisplay: async (src) => (src === 'doc.assets/a.png' ? 'data:image/png;base64,QUJD' : null),
    })
    await editor.create()
    await tick()
    const img = host.querySelector('img:not(.ProseMirror-separator)')
    expect(img?.getAttribute('src')).toBe('data:image/png;base64,QUJD')
    expect(img?.getAttribute('alt')).toBe('截图')
    expect(getMarkdown(editor)).toContain('![截图](doc.assets/a.png)')
    await editor.destroy()
    host.remove()
  })

  it('粘贴图片落盘为相对路径后同样能显示', async () => {
    const host = document.createElement('div')
    document.body.appendChild(host)
    const editor = createMarkdownEditor(host, '正文', {}, {
      onImageFile: async () => 'doc.assets/pasted.png',
      resolveImageDisplay: async (src) => (src === 'doc.assets/pasted.png' ? 'data:image/png;base64,QUJD' : null),
    })
    await editor.create()
    const view = editor.action((ctx) => ctx.get(editorViewCtx))
    const file = new File(['png'], 'image.png', { type: 'image/png' })
    const event = new FakeClipboardEvent('paste', {
      clipboardData: { files: [file], items: [], getData: () => '' },
    })
    view.dom.dispatchEvent(event)
    await tick(80)
    expect(getMarkdown(editor)).toContain('doc.assets/pasted.png')
    const img = host.querySelector('img:not(.ProseMirror-separator)')
    expect(img?.getAttribute('src')).toBe('data:image/png;base64,QUJD')
    await editor.destroy()
    host.remove()
  })

  it('解析不到（文件缺失）时不崩溃、文档不变', async () => {
    const host = document.createElement('div')
    document.body.appendChild(host)
    const editor = createMarkdownEditor(host, '![x](missing.png)', {}, {
      resolveImageDisplay: async () => null,
    })
    await editor.create()
    await tick()
    expect(host.querySelector('img')).not.toBeNull()
    expect(getMarkdown(editor)).toContain('![x](missing.png)')
    await editor.destroy()
    host.remove()
  })
})