import pathlib
ROOT=pathlib.Path(__file__).resolve().parents[1]

def test_version_420():
    assert (ROOT/'VERSION').read_text(encoding='utf-8').strip()=='4.6.20'

def test_manifest_has_filename_and_sizes():
    svc=(ROOT/"services"/"ocean_batch.py").read_text(encoding="utf-8")
    assert '"filename"' in svc
    assert '"size_bytes"' in svc
    assert '"known_size_bytes"' in svc
    assert '"known_size_file_count"' in svc

def test_frontend_has_one_click_batch_download():
    js=(ROOT/"static"/"js"/"app.js").read_text(encoding="utf-8")
    assert "function startOceanBatchDownloadAll" in js
    assert "function runOceanBatchDownloadQueue" in js
    assert "function waitManagedDownloadStatus" in js
    assert "打包 ZIP 下载" in js and "逐个下载" in js
    assert "查看文件" in js

def test_batch_download_uses_managed_range_jobs():
    js=(ROOT/"static"/"js"/"app.js").read_text(encoding="utf-8")
    assert 'j("/api/download/jobs"' in js
    assert "triggerBrowserSave(job.stream_url" in js
    assert "resume_supported" in js
    assert "30 秒无新字节" in js

def test_queue_persists_across_page_refresh():
    js=(ROOT/"static"/"js"/"app.js").read_text(encoding="utf-8")
    assert "ocean_batch_download_queue:" in js
    assert "restoreOceanBatchDownloadQueue" in js
    assert "localStorage.setItem" in js

def test_batch_download_css():
    css=(ROOT/"static"/"css"/"app.css").read_text(encoding="utf-8")
    assert ".ocean-batch-download-queue" in css
    assert ".ocean-batch-file-list" in css