#!/usr/bin/env python3
"""One-off: render every tracked .svg to a same-named .png via headless Chromium.
Not part of the build; run manually. Leaves the source .svg untouched."""
import re
import subprocess
import sys
from pathlib import Path

CHROME = "/opt/pw-browsers/chromium-1194/chrome-linux/chrome"
ROOT = Path("/home/user/StarForth")

DIM_RE = re.compile(r'(width|height)\s*=\s*["\']([0-9.]+)(pt|px)?["\']')
VIEWBOX_RE = re.compile(r'viewBox\s*=\s*["\']([\d.\-]+)\s+([\d.\-]+)\s+([\d.\-]+)\s+([\d.\-]+)["\']')


def get_dims(svg_path: Path):
    text = svg_path.read_text(errors="replace")
    svg_open = re.search(r"<svg\b[^>]*>", text)
    head = svg_open.group(0) if svg_open else text[:4000]
    dims = {}
    for m in DIM_RE.finditer(head):
        name, val, unit = m.group(1), float(m.group(2)), m.group(3) or "px"
        if name in dims:
            continue  # keep only the first (root <svg>) match
        px = val * (4 / 3) if unit == "pt" else val
        dims[name] = px
    if "width" in dims and "height" in dims:
        return int(round(dims["width"])), int(round(dims["height"]))
    vb = VIEWBOX_RE.search(head)
    if vb:
        w, h = float(vb.group(3)), float(vb.group(4))
        return int(round(w)), int(round(h))
    return 1024, 768


def render(svg_path: Path) -> bool:
    png_path = svg_path.with_suffix(".png")
    w, h = get_dims(svg_path)
    w = max(w, 16)
    h = max(h, 16)
    cmd = [
        CHROME, "--headless", "--disable-gpu", "--no-sandbox",
        "--hide-scrollbars",
        f"--screenshot={png_path}",
        f"--window-size={w},{h}",
        "--force-device-scale-factor=2",
        "--default-background-color=00000000",
        f"file://{svg_path}",
    ]
    r = subprocess.run(cmd, capture_output=True, text=True, timeout=60)
    ok = png_path.exists() and png_path.stat().st_size > 0
    if not ok:
        print(f"FAIL {svg_path}: {r.stderr[-500:]}", file=sys.stderr)
    return ok


def main():
    svgs = sorted(ROOT.rglob("*.svg"))
    svgs = [s for s in svgs if "node_modules" not in s.parts]
    print(f"Found {len(svgs)} SVGs")
    failed = []
    for i, svg in enumerate(svgs, 1):
        rel = svg.relative_to(ROOT)
        ok = render(svg)
        status = "ok" if ok else "FAIL"
        print(f"[{i}/{len(svgs)}] {status}  {rel}")
        if not ok:
            failed.append(rel)
    if failed:
        print(f"\n{len(failed)} failed:")
        for f in failed:
            print(f"  {f}")
    else:
        print("\nAll converted.")


if __name__ == "__main__":
    main()