#!/usr/bin/env bash
# Builds www/ from reference/ for the Capacitor wrapper.
#
# reference/ is the frozen spec and is NEVER edited. Everything native-specific
# is either an additive file (native.css, native.js) or one of the three
# removals below. Each patch asserts its anchor exists, so if the reference
# ever changes shape this fails loudly instead of silently shipping a broken app.
set -euo pipefail

cd "$(dirname "$0")/.."
SRC="reference"
OUT="www"

[ -f "$SRC/index.html" ] || { echo "missing $SRC/index.html"; exit 1; }

rm -rf "$OUT"
mkdir -p "$OUT"

# sw.js and README.md are deliberately not copied:
#  - the service worker would cache index.html and serve a stale app after an
#    APK update; assets are already local so it buys nothing.
#  - README documents the web deployment, irrelevant inside the APK.
cp -r "$SRC/fonts" "$SRC/icons" "$OUT/"
cp "$SRC/manifest.webmanifest" "$OUT/"   # harmless, keeps icon refs valid
cp "$SRC/index.html" "$OUT/index.html"
cp native/native.css native/native.js "$OUT/"

python3 - "$OUT/index.html" <<'PY'
import sys, re

path = sys.argv[1]
html = open(path, encoding="utf-8").read()

def patch(html, anchor, replacement, label):
    if anchor not in html:
        sys.exit(f"sync-www: anchor not found for '{label}':\n  {anchor[:90]}")
    return html.replace(anchor, replacement, 1)

# 1. drop the service worker registration
sw = '<script>if("serviceWorker" in navigator&&location.protocol!=="file:")addEventListener("load",()=>navigator.serviceWorker.register("sw.js"));</script>\n'
html = patch(html, sw, "", "service worker registration")

# 2. drop the web manifest link (the APK's own manifest governs the app)
html = patch(html, '<link rel="manifest" href="manifest.webmanifest">', "", "manifest link")

# 3. native stylesheet last in <head> so its overrides win on equal specificity
html = patch(html, "</head>",
             '<link rel="stylesheet" href="native.css">\n</head>', "head close")

# 4. native script after the app script, so its globals already exist
html = patch(html, "</body>",
             '<script src="native.js"></script>\n</body>', "body close")

open(path, "w", encoding="utf-8").write(html)
print("sync-www: patched index.html (4/4 anchors matched)")
PY

echo "sync-www: $OUT/ built from $SRC/"