import assert from 'node:assert/strict'
import test from 'node:test'
import {
  createMediaBlockMarkdown,
  formatMediaFileSize,
  getGallerySelectionOrder,
  getMediaItemKind,
  getMediaPickerPreviewUrl,
  isMediaItemSelectableForTarget,
  isUploadFileAllowedForMediaTarget,
  resolveSelectedMediaItems,
  toggleMediaSelectionState
} from '../lib/markdown-editor-media.js'

test('미디어 파일 크기를 표시 문자열로 변환한다', () => {
  assert.equal(formatMediaFileSize(512), '512 B')
  assert.equal(formatMediaFileSize(1536), '2 KB')
  assert.equal(formatMediaFileSize(1024 * 1024 * 1.5), '1.5 MB')
  assert.equal(formatMediaFileSize(0), '')
})

test('미디어 항목 kind가 없으면 확장자와 URL로 종류를 판별한다', () => {
  assert.equal(getMediaItemKind({ url: '/uploads/a.webp' }), 'image')
  assert.equal(getMediaItemKind({ url: '/uploads/a.mp4?x=1' }), 'video')
  assert.equal(getMediaItemKind({ url: '/uploads/a.m4a' }), 'audio')
  assert.equal(getMediaItemKind({ url: '/uploads/a.zip' }), 'file')
})

test('선택 대상별로 허용 미디어를 판별하고 파생 썸네일은 제외한다', () => {
  assert.equal(isMediaItemSelectableForTarget({ url: '/uploads/posts/2026/07/a.png' }, 'image'), true)
  assert.equal(isMediaItemSelectableForTarget({ url: '/uploads/posts/2026/07/a.mp4' }, 'image'), false)
  assert.equal(isMediaItemSelectableForTarget({ url: '/uploads/posts/2026/07/a.mp4' }, 'video'), true)
  assert.equal(isMediaItemSelectableForTarget({ url: '/uploads/posts/2026/07/thumbs/a-card.webp' }, 'image'), false)
  assert.equal(isMediaItemSelectableForTarget({ url: '/uploads/posts/2026/07/thumbs/a-body-720.webp' }, 'gallery'), false)
})

test('미디어 선택 미리보기는 본문 파생 썸네일을 우선한다', () => {
  assert.equal(getMediaPickerPreviewUrl({
    url: '/uploads/posts/2026/07/a.png',
    updatedAt: '2026-07-24T00:00:00.000Z',
    size: 100,
    bodyThumbnailStatus: {
      hasThumbnail: true
    }
  }), '/uploads/posts/2026/07/thumbs/a-body-720.webp?v=2026-07-24T00%3A00%3A00.000Z-100')
})

test('업로드 파일은 선택 대상별 MIME 타입으로 허용 여부를 판별한다', () => {
  assert.equal(isUploadFileAllowedForMediaTarget({ type: 'image/png' }, 'gallery'), true)
  assert.equal(isUploadFileAllowedForMediaTarget({ type: 'video/mp4' }, 'video'), true)
  assert.equal(isUploadFileAllowedForMediaTarget({ type: 'audio/mpeg' }, 'audio'), true)
  assert.equal(isUploadFileAllowedForMediaTarget({ type: 'application/pdf' }, 'file'), true)
  assert.equal(isUploadFileAllowedForMediaTarget({ type: 'image/png' }, 'file'), false)
})

test('미디어 항목으로 fenced 미디어 블록을 만든다', () => {
  assert.deepEqual(createMediaBlockMarkdown('video', {
    url: '/uploads/a.mp4',
    title: '영상'
  }), [':::video', 'url=/uploads/a.mp4', 'title=영상', 'caption=', ':::'])

  assert.deepEqual(createMediaBlockMarkdown('file', {
    url: '/uploads/a.pdf',
    name: 'a.pdf',
    size: 2048
  }), [':::file', 'url=/uploads/a.pdf', 'title=a.pdf', 'description=', 'name=a.pdf', 'size=2 KB', ':::'])
})

test('갤러리 선택 순서를 선택 URL 순서로 반환한다', () => {
  assert.equal(getGallerySelectionOrder(['/a.png', '/b.png'], '/b.png'), 2)
  assert.equal(getGallerySelectionOrder(['/a.png'], '/b.png'), 0)
})

test('단일 미디어 선택은 기존 선택을 새 항목 하나로 교체한다', () => {
  assert.deepEqual(toggleMediaSelectionState({
    selectedUrls: ['/old.png'],
    selectedItemMap: {
      '/old.png': { url: '/old.png' }
    },
    mediaItem: { url: '/new.png', name: 'new' },
    isGallery: false
  }), {
    selectedUrls: ['/new.png'],
    selectedItemMap: {
      '/new.png': { url: '/new.png', name: 'new' }
    }
  })
})

test('갤러리 미디어 선택은 선택 추가와 제거를 토글한다', () => {
  const selected = toggleMediaSelectionState({
    selectedUrls: ['/a.png'],
    selectedItemMap: {
      '/a.png': { url: '/a.png' }
    },
    mediaItem: { url: '/b.png' },
    isGallery: true
  })

  assert.deepEqual(selected.selectedUrls, ['/a.png', '/b.png'])
  assert.deepEqual(Object.keys(selected.selectedItemMap), ['/a.png', '/b.png'])

  assert.deepEqual(toggleMediaSelectionState({
    selectedUrls: selected.selectedUrls,
    selectedItemMap: selected.selectedItemMap,
    mediaItem: { url: '/a.png' },
    isGallery: true
  }), {
    selectedUrls: ['/b.png'],
    selectedItemMap: {
      '/b.png': { url: '/b.png' }
    }
  })
})

test('선택된 URL 순서대로 미디어 항목을 해석한다', () => {
  assert.deepEqual(resolveSelectedMediaItems(
    ['/a.png', '/b.png', '/missing.png'],
    {
      '/a.png': { url: '/a.png', source: 'map' }
    },
    [
      { url: '/b.png', source: 'list' }
    ]
  ), [
    { url: '/a.png', source: 'map' },
    { url: '/b.png', source: 'list' }
  ])
})