#!/usr/bin/env python3
# Builds the web UI's logo from the master, artwork/logo.svg (a key whose
# bow is a crown with Jarl's network nodes, in Jarl's blue and white):
#
#   internal/web/static/assets/logo.svg  the favicon (a copy)
#   internal/web/static/assets/logo.js   the shapes for the web UI, which
#                                        draws them inline (brand.js), so the
#                                        logo appears together with the page
#
# The master is hand-written SVG: <g> elements whose attributes apply to
# their <path> and <circle> children. Run from the repository root after
# changing it:
#
#   python3 scripts/logo.py
import json
import os
import shutil
import sys
import xml.etree.ElementTree as ET

MASTER = "artwork/logo.svg"
OUT = "internal/web/static/assets"
SVG = "{http://www.w3.org/2000/svg}"


def shapes(el, inherited):
    out = []
    attrs = dict(inherited)
    attrs.update({k: v for k, v in el.attrib.items() if k not in ("xmlns", "viewBox")})
    tag = el.tag.replace(SVG, "")
    if tag in ("path", "circle", "rect", "polygon"):
        out.append([tag, attrs])
    for child in el:
        out.extend(shapes(child, attrs if tag == "g" else inherited))
    return out


def main():
    root = ET.parse(MASTER).getroot()
    view_box = root.attrib["viewBox"]
    items = []
    for child in root:
        items.extend(shapes(child, {}))
    with open(os.path.join(OUT, "logo.js"), "w") as f:
        f.write(f"// The Steward logo, from {MASTER} by scripts/logo.py; don't edit.\n"
                "// brand.js draws it; logo.svg is the same picture.\n"
                f"export const viewBox = {json.dumps(view_box)};\n"
                "export const shapes = [\n"
                + "".join(f"  {json.dumps(s)},\n" for s in items)
                + "];\n")
    shutil.copyfile(MASTER, os.path.join(OUT, "logo.svg"))
    for name in ("logo.svg", "logo.js"):
        print(f"{OUT}/{name}: {os.path.getsize(os.path.join(OUT, name))} bytes")


if __name__ == "__main__":
    sys.exit(main())