"""Inspect the HTML structure to find test period / sections."""
from pathlib import Path
from lxml import html

for label, fn in [("IS", "IS-ReportTester-52845377.html"), ("OOS", "OOS-ReportTester-52845377.html")]:
    p = Path("reports") / fn
    raw = p.read_bytes()
    text = raw.decode("utf-16") if raw[:2] in (b"\xff\xfe", b"\xfe\xff") else raw.decode("utf-8", errors="replace")
    tree = html.fromstring(text)

    print(f"=== {label} ({fn}) ===")

    # Find the test period row
    for row in tree.iter("tr"):
        cells = row.findall("td") or row.findall("th")
        if len(cells) < 2:
            continue
        label_t = cells[0].text_content().strip()
        if any(k in label_t for k in ["期间", "Period", "建模", "Model",
                                       "前向", "Forward", "起止", "Date"]):
            value = cells[1].text_content().strip()
            print(f"  {label_t}: {value}")

    # Look for big section headers
    print(f"  -- h1/h2/h3 headers --")
    for tag in ("h1", "h2", "h3", "h4"):
        for el in tree.iter(tag):
            t = (el.text_content() or "").strip()
            if t:
                print(f"  <{tag}>: {t}")

    # Count tables and tr
    tables = tree.findall(".//table")
    print(f"  tables: {len(tables)}")
    total_tr = sum(len(t.findall(".//tr")) for t in tables)
    print(f"  total <tr>: {total_tr}")
    print()