from __future__ import annotations

import json
import subprocess
from pathlib import Path


HTML_PATH = Path("apps/web/vue3/index.html")


def _source_block(source: str, start: str, end: str) -> str:
    return source[source.index(start) : source.index(end)]


def _run_node(script: str) -> dict:
    completed = subprocess.run(
        ["node", "-e", script],
        check=True,
        capture_output=True,
        text=True,
    )
    return json.loads(completed.stdout.strip())


def _progress_state_script(body: str) -> str:
    html = HTML_PATH.read_text(encoding="utf-8")
    updater = _source_block(
        html,
        "const updateReferenceBundleDownloadProgress =",
        "const pollReferenceBundleDownloadTask =",
    )
    return f"""
const referenceBundleDownloadState = {{value: {{
  visible: false, taskId: '', speciesLabel: '', message: '',
  percentage: 0, indeterminate: true, status: '',
  bytesDownloaded: 0, totalBytes: 0
}}}};
{updater}
{body}
"""


def test_unknown_total_keeps_indeterminate_progress_and_reports_downloaded_bytes() -> None:
    result = _run_node(
        _progress_state_script(
            """
updateReferenceBundleDownloadProgress({
  id: 'task-download', status: 'running',
  progress: {bytes_downloaded: 8388608, total_bytes: 0, indeterminate: true}
}, {species_name: 'Spinacia oleracea'});
console.log(JSON.stringify(referenceBundleDownloadState.value));
"""
        )
    )

    assert result["visible"] is True
    assert result["speciesLabel"] == "Spinacia oleracea"
    assert result["bytesDownloaded"] == 8388608
    assert result["totalBytes"] == 0
    assert result["indeterminate"] is True


def test_failure_without_new_progress_preserves_last_downloaded_bytes() -> None:
    result = _run_node(
        _progress_state_script(
            """
updateReferenceBundleDownloadProgress({
  id: 'task-download', status: 'running',
  progress: {bytes_downloaded: 8388608, total_bytes: 0, indeterminate: true}
}, {species_name: 'Spinacia oleracea'});
updateReferenceBundleDownloadProgress({
  status: 'failed', message: 'IncompleteRead(726589 bytes read)'
}, {species_name: 'Spinacia oleracea'});
console.log(JSON.stringify(referenceBundleDownloadState.value));
"""
        )
    )

    assert result["status"] == "failed"
    assert result["message"] == "IncompleteRead(726589 bytes read)"
    assert result["bytesDownloaded"] == 8388608
    assert result["totalBytes"] == 0


def test_clear_resets_terminal_download_state() -> None:
    result = _run_node(
        _progress_state_script(
            """
updateReferenceBundleDownloadProgress({
  id: 'task-download', status: 'failed', message: 'download failed',
  progress: {bytes_downloaded: 4096, total_bytes: 0, indeterminate: true}
}, {species_name: 'Spinacia oleracea'});
clearReferenceBundleDownloadProgress();
console.log(JSON.stringify(referenceBundleDownloadState.value));
"""
        )
    )

    assert result == {
        "visible": False,
        "taskId": "",
        "speciesLabel": "",
        "message": "",
        "percentage": 0,
        "indeterminate": True,
        "status": "",
        "bytesDownloaded": 0,
        "totalBytes": 0,
    }


def test_download_indicator_is_beside_tip_and_not_inside_batch_dialog() -> None:
    html = HTML_PATH.read_text(encoding="utf-8")
    toolbar = _source_block(
        html,
        "<!-- 使用小Tip hover弹出 -->",
        "<!-- Upload hover弹出已上传文件 -->",
    )
    batch_dialog = _source_block(
        html,
        "<!-- 批量执行确认对话框 -->",
        "<!-- 阶段确认对话框（批量执行用） -->",
    )

    assert 'class="reference-download-progress"' in toolbar
    assert "referenceBundleDownloadState.visible" in toolbar
    assert "PPI and Ka/Ks Reference Species Data Download" in toolbar
    assert ':show-text="!referenceBundleDownloadState.indeterminate"' in toolbar
    assert 'class="reference-download-progress"' not in batch_dialog
    assert "referenceBundleDownloadState.visible" not in batch_dialog


def test_download_byte_formatter_uses_binary_units() -> None:
    html = HTML_PATH.read_text(encoding="utf-8")
    assert "const formatReferenceDownloadBytes =" in html
    formatter = _source_block(
        html,
        "const formatReferenceDownloadBytes =",
        "const updateReferenceBundleDownloadProgress =",
    )
    result = _run_node(
        formatter
        + """
console.log(JSON.stringify({
  zero: formatReferenceDownloadBytes(0),
  mib: formatReferenceDownloadBytes(8388608)
}));
"""
    )

    assert result == {"zero": "", "mib": "8.0 MB"}


def test_monitor_retains_success_and_passes_failed_task_progress() -> None:
    html = HTML_PATH.read_text(encoding="utf-8")
    monitor = _source_block(
        html,
        "const monitorPpiReferenceBundleDownload =",
        "const ppiHasNearReferenceBeforeArabidopsis =",
    )

    assert "clearReferenceBundleDownloadProgress();" not in monitor
    assert "err?.task" in monitor