#!/usr/bin/env python3
"""Sync the published canvas file with the artboards on disk.

build.py writes the .dc.html artboards and canvas.json is edited by hand; this
folds both back into afrix-mobile-concept.html, which carries the editor and the
design content in one file. Images already embedded are left alone.

    python3 build.py && python3 reseed.py
"""
import io, json, os, re

HERE = os.path.dirname(os.path.abspath(__file__))
DOC = os.path.join(HERE, "afrix-mobile-concept.html")

src = io.open(DOC, encoding="utf-8").read()
m = re.search(r'(<script[^>]*id="appifact-doc"[^>]*>)(.*?)(</script>)', src, re.S)
if not m:
    raise SystemExit("no appifact-doc block in %s" % DOC)

doc = json.loads(m.group(2))
files = doc["content"]["files"]
order = list(files)                      # keep the artboard order the editor stored

added, changed = [], []
for name in sorted(os.listdir(HERE)):
    if not name.endswith(".dc.html"):
        continue
    body = io.open(os.path.join(HERE, name), encoding="utf-8").read()
    if name not in files:
        added.append(name)
    elif files[name] != body:
        changed.append(name)
    files[name] = body

canvas = io.open(os.path.join(HERE, "canvas.json"), encoding="utf-8").read()
if files.get("canvas.json") != canvas:
    changed.append("canvas.json")
files["canvas.json"] = canvas

# new artboards go in before the images and canvas.json, so the editor lists them
# beside their siblings rather than after the assets
tail = [k for k in order if not k.endswith(".dc.html")]
doc["content"]["files"] = {k: files[k] for k in
                           [k for k in order if k.endswith(".dc.html")] + added + tail}

payload = json.dumps(doc, ensure_ascii=False, separators=(",", ":"))
if "</script" in payload:                 # would close the block early
    payload = payload.replace("</script", "<\\/script")
out = src[:m.start(2)] + payload + src[m.end(2):]
io.open(DOC, "w", encoding="utf-8").write(out)

print("reseeded %s — %.0f KB" % (os.path.basename(DOC), len(out) / 1024))
print("  added:   %s" % (", ".join(added) or "none"))
print("  changed: %s" % (", ".join(sorted(set(changed))) or "none"))