import assert from 'node:assert/strict'
import test from 'node:test'
import { nextTick, ref } from 'vue'
import { useAdminMarkdownBlockActions } from '../composables/useAdminMarkdownBlockActions.js'

/**
 * 테스트용 블록 액션 상태를 만든다.
 * @param {Object} options - 테스트 옵션
 * @returns {Object} 테스트 상태
 */
const createBlockActionsState = (options = {}) => {
  const calls = {
    applyPlans: [],
    ensure: 0,
    focusPreview: [],
    insertGallery: [],
    previewFocusRequests: [],
    textareaSelections: []
  }
  const value = ref(options.value ?? '![기존](/old.png)')
  const activeMediaBlock = ref(options.activeMediaBlock ?? {
    kind: 'image',
    startLine: 0,
    endLine: 0,
    images: [{ alt: '기존', url: '/old.png' }]
  })
  const activeBlockContext = ref(options.activeBlockContext ?? activeMediaBlock.value)
  const inlineColorSelectionContext = ref(options.inlineColorSelectionContext ?? null)
  const actions = useAdminMarkdownBlockActions({
    value,
    activeMediaBlock,
    activeBlockContext,
    inlineColorSelectionContext,
    applyLineReplacementPlan: (plan, focusEditor = false) => {
      calls.applyPlans.push({ plan, focusEditor })

      if (!plan) {
        return false
      }

      const lines = String(value.value || '').split('\n')
      lines.splice(plan.startLine, plan.endLine - plan.startLine + 1, ...plan.replacementLines)
      value.value = lines.join('\n')
      return true
    },
    ensureBlockPanelEngaged: () => {
      calls.ensure += 1
    },
    insertGallery: (images) => {
      calls.insertGallery.push(images)
    },
    setTextareaSelection: (...args) => {
      calls.textareaSelections.push(args)
    },
    requestPreviewFocus: (focus) => {
      calls.previewFocusRequests.push(focus)
    },
    focusPreviewEditableAtLine: (...args) => {
      calls.focusPreview.push(args)
    }
  })

  return {
    actions,
    activeBlockContext,
    activeMediaBlock,
    calls,
    inlineColorSelectionContext,
    value
  }
}

test('이미지 표시 너비 변경을 현재 미디어 줄에 적용한다', () => {
  const state = createBlockActionsState()

  state.actions.updateActiveMediaImage(0, { pixelWidth: 240 })

  assert.equal(state.value.value, '![](/old.png){size=240}')
  assert.equal(state.calls.ensure, 1)
  assert.equal(state.calls.applyPlans.at(-1).focusEditor, false)
})

test('파일명 캡션 사용은 이미지 URL 기준 기본 캡션을 채운다', () => {
  const state = createBlockActionsState({
    value: '![](/uploads/posts/2026/07/sample.png)',
    activeMediaBlock: {
      kind: 'image',
      startLine: 0,
      endLine: 0,
      images: [{ alt: '', caption: '', url: '/uploads/posts/2026/07/sample.png' }]
    }
  })

  state.actions.setActiveMediaUseAlt(0, true)

  assert.equal(state.value.value, '![](/uploads/posts/2026/07/sample.png "sample.png")')
  assert.equal(state.calls.ensure, 1)
})

test('활성 갤러리가 없으면 갤러리 삽입 함수로 위임한다', () => {
  const state = createBlockActionsState({
    activeMediaBlock: null
  })
  const images = [{ url: '/a.png', alt: 'A' }]

  state.actions.appendImagesToActiveGallery(images)

  assert.deepEqual(state.calls.insertGallery, [images])
  assert.equal(state.calls.applyPlans.length, 0)
})

test('소스 모드 인라인 색상 적용 후 textarea 선택 범위를 갱신한다', () => {
  const state = createBlockActionsState({
    value: '강조 문장',
    inlineColorSelectionContext: {
      kind: 'inline-color',
      mode: 'source',
      start: 0,
      end: 2,
      text: '강조'
    }
  })

  state.actions.updateActiveInlineColor('red')

  assert.equal(state.value.value, '::red[강조] 문장')
  assert.equal(state.inlineColorSelectionContext.value, null)
  assert.deepEqual(state.calls.textareaSelections, [[9, 9, { preserveScroll: true }]])
  assert.equal(state.calls.ensure, 1)
})

test('라이브 모드 인라인 색상 적용 후 미리보기 포커스를 예약한다', async () => {
  const state = createBlockActionsState({
    value: '> 문장 테스트',
    inlineColorSelectionContext: {
      kind: 'inline-color',
      mode: 'live',
      sourceLine: 0,
      startOffset: 0,
      endOffset: 2,
      bodyText: '문장 테스트',
      text: '문장'
    }
  })

  state.actions.updateActiveInlineColor('blue')
  await nextTick()

  assert.equal(state.value.value, '> ::blue[문장] 테스트')
  assert.equal(state.inlineColorSelectionContext.value, null)
  assert.deepEqual(state.calls.previewFocusRequests, [{ line: 0, offset: 2 }])
  assert.deepEqual(state.calls.focusPreview, [[0, 0, 'auto', 2, 'nearest']])
})