// 阶段 6 测试：文档查找索引与匹配（桩文档 + 真实编辑器）、快捷键注册表、专注模式装饰。
import { describe, it, expect } from 'vitest'
import { buildTextIndex, findInIndex, type FindOptions } from '../src/editor/search'
import { comboFromEvent, effectiveCombos, resolveShortcuts, prettyCombo, comboOwner, SHORTCUT_DEFS } from '../src/utils/shortcuts'
import { createMarkdownEditor, getMarkdown } from '../src/editor/editor'
import { setFocusModeEnabled } from '../src/editor/plugins'

const OPTS: FindOptions = { caseSensitive: false, wholeWord: false, regex: false }

/** 桩文档：按 ProseMirror descendants 语义回放文本节点与位置。 */
function stubDoc(segments: { text: string; pos: number }[]) {
  return {
    descendants: (fn: (node: { isText: boolean; text?: string }, pos: number) => void) => {
      for (const seg of segments) fn({ isText: true, text: seg.text }, seg.pos)
    },
  }
}

describe('查找索引与匹配', () => {
  it('跨文本节点命中能映射回连续文档位置', () => {
    // "Hello " 与 "World" 是两个文本节点（如中间有格式标记）
    const index = buildTextIndex(stubDoc([{ text: 'Hello ', pos: 1 }, { text: 'World', pos: 7 }]))
    const hits = findInIndex(index, 'o w', OPTS)
    expect(hits).toHaveLength(1)
    expect(hits[0].from).toBe(5)
    expect(hits[0].to).toBe(8)
  })

  it('跨块命中被跳过（块间分隔符）', () => {
    const index = buildTextIndex(stubDoc([{ text: 'abc', pos: 1 }, { text: 'def', pos: 6 }]))
    expect(findInIndex(index, 'cdef', OPTS)).toHaveLength(0)
    expect(findInIndex(index, 'def', OPTS)).toHaveLength(1)
  })

  it('大小写/整词/正则选项', () => {
    const index = buildTextIndex(stubDoc([{ text: 'Cat cat scatter CAT', pos: 1 }]))
    expect(findInIndex(index, 'cat', OPTS)).toHaveLength(4)
    expect(findInIndex(index, 'cat', { ...OPTS, caseSensitive: true })).toHaveLength(2)
    expect(findInIndex(index, 'cat', { ...OPTS, wholeWord: true })).toHaveLength(3)
    expect(findInIndex(index, 'c.t', { ...OPTS, regex: true })).toHaveLength(4)
    expect(() => findInIndex(index, '(', { ...OPTS, regex: true })).toThrow(/正则表达式无效/)
  })

  it('真实编辑器文档可查且替换后文本正确', async () => {
    const host = document.createElement('div')
    document.body.appendChild(host)
    const editor = createMarkdownEditor(host, '# 标题\n\nhello 世界 hello\n')
    await editor.create()
    const { editorViewCtx } = await import('@milkdown/kit/core')
    const { TextSelection } = await import('@milkdown/kit/prose/state')
    const matches = editor.action((ctx) => {
      const view = ctx.get(editorViewCtx)
      return findInIndex(buildTextIndex(view.state.doc), 'hello', OPTS)
    })
    expect(matches).toHaveLength(2)
    editor.action((ctx) => {
      const view = ctx.get(editorViewCtx)
      const m = matches[0]
      view.dispatch(view.state.tr.setSelection(TextSelection.create(view.state.doc, m.from, m.to)))
      expect(view.state.doc.textBetween(m.from, m.to)).toBe('hello')
      view.dispatch(view.state.tr.insertText('HELLO', m.from, m.to))
    })
    expect(getMarkdown(editor)).toContain('HELLO 世界 hello')
    await editor.destroy()
    host.remove()
  })
})

describe('快捷键注册表', () => {
  it('默认绑定完整且无组合键冲突', () => {
    const resolved = resolveShortcuts({})
    expect(resolved.get('ctrl+s')).toBe('save')
    expect(resolved.get('ctrl+f')).toBe('find')
    expect(resolved.get('ctrl+1')).toBe('heading1')
    const combos = SHORTCUT_DEFS.map((d) => d.defaultCombo)
    expect(new Set(combos).size).toBe(combos.length)
  })

  it('覆盖、解绑与冲突查询', () => {
    const overrides = { find: 'ctrl+shift+f', save: '' }
    const resolved = resolveShortcuts(overrides)
    expect(resolved.get('ctrl+shift+f')).toBe('find')
    expect(resolved.get('ctrl+f')).toBeUndefined()
    expect(resolved.get('ctrl+s')).toBeUndefined()
    expect(effectiveCombos(overrides).has('save')).toBe(false) // 解绑后不在生效表内
    expect(comboOwner('ctrl+shift+f', {}, 'find')?.id).toBeUndefined
    expect(comboOwner('ctrl+s', {})?.id).toBe('save')
    // 改绑到他人组合键时覆盖优先
    expect(resolveShortcuts({ find: 'ctrl+s' }).get('ctrl+s')).toBe('find')
  })

  it('事件组合键归一化与展示', () => {
    expect(comboFromEvent({ ctrlKey: true, metaKey: false, altKey: false, shiftKey: true, key: 'S' })).toBe('ctrl+shift+s')
    expect(comboFromEvent({ ctrlKey: true, metaKey: false, altKey: false, shiftKey: true, key: '+' })).toBe('ctrl+=')
    expect(comboFromEvent({ ctrlKey: true, metaKey: false, altKey: false, shiftKey: false, key: 'Control' })).toBeNull()
    expect(prettyCombo('ctrl+shift+s')).toBe('Ctrl+Shift+S')
    expect(prettyCombo('')).toBe('（未绑定）')
  })
})

describe('专注模式装饰', () => {
  it('开启后非当前块获得 focus-dim 类，关闭后消失', async () => {
    const host = document.createElement('div')
    document.body.appendChild(host)
    setFocusModeEnabled(true)
    const editor = createMarkdownEditor(host, '第一段文字。\n\n第二段文字。\n\n第三段文字。\n')
    await editor.create()
    const { editorViewCtx } = await import('@milkdown/kit/core')
    const { TextSelection } = await import('@milkdown/kit/prose/state')
    editor.action((ctx) => {
      const view = ctx.get(editorViewCtx)
      // 把光标放到第一段，触发一次选区变化让装饰重算
      view.dispatch(view.state.tr.setSelection(TextSelection.create(view.state.doc, 2)))
    })
    const dimmed = host.querySelectorAll('.focus-dim')
    expect(dimmed.length).toBe(2)
    setFocusModeEnabled(false)
    editor.action((ctx) => {
      const view = ctx.get(editorViewCtx)
      view.dispatch(view.state.tr.setSelection(TextSelection.create(view.state.doc, 3)))
    })
    expect(host.querySelectorAll('.focus-dim').length).toBe(0)
    await editor.destroy()
    host.remove()
  })
})