#!/bin/sh
# Re-apply the UI/layout fixes to a rebuilt or updated Atheos tree.
#
# Why this exists: Atheos has no releases and `scripts/update-atheos.sh` replaces the whole
# application directory, so any local patch is lost on update. These are the two that were
# needed to make the editor usable. Both are IDEMPOTENT - run it as often as you like.
#
#   1. panel { height: 500px }      ->  height:auto; max-height:58vh
#      Every modal panel was forced to a fixed 500px box, so dialogs with short content showed
#      a large empty black region and anything after the panel (codegit's "Branch:" toolbar)
#      was pushed OUTSIDE the modal. See docs/known-issues.md §4.
#
#   2. nginx: Cache-Control: no-cache for *.css/*.js
#      Theme/bundle changes were invisible behind the browser cache. §5.
#
# Usage:  sh scripts/fix-panel-layout.sh          (run ON the guest, as root)
set -e

ATH=/var/www/atheos
CSS=$ATH/theme/main.min.css
SCSS=$ATH/theme/modules/common/_panel.scss
NGX=/etc/nginx/http.d/atheos.conf

echo "=== 1. panel layout ==="
OLD='height:500px;position:relative;border-left:var(--borderLight)'
NEW='height:auto;max-height:58vh;position:relative;border-left:var(--borderLight)'
if [ ! -f "$CSS" ]; then
  echo "  !! $CSS not found - is Atheos installed?"
elif grep -qF "$NEW" "$CSS"; then
  echo "  already applied"
elif grep -qF "$OLD" "$CSS"; then
  [ -f "$CSS.orig" ] || cp -a "$CSS" "$CSS.orig"
  php83 -r '$f=$argv[1];$o=$argv[2];$n=$argv[3];$s=file_get_contents($f);
            if(strpos($s,$o)===false){exit(1);} file_put_contents($f,str_replace($o,$n,$s));' "$CSS" "$OLD" "$NEW"
  echo "  applied to main.min.css"
else
  echo "  !! expected panel rule not found - inspect manually"
  echo "     (upstream may have changed it; diff against $CSS.orig)"
fi

# keep the SCSS source consistent so the shipped CSS is not contradicted by the source
if [ -f "$SCSS" ] && grep -q 'height: 500px;' "$SCSS"; then
  [ -f "$SCSS.orig" ] || cp -a "$SCSS" "$SCSS.orig"
  php83 -r '$f=$argv[1];$s=file_get_contents($f);
            $s=str_replace("height: 500px;","height: auto;\n\tmax-height: 58vh;",$s);
            file_put_contents($f,$s);' "$SCSS"
  echo "  synchronised _panel.scss"
fi

echo "=== 2. nginx cache headers ==="
if [ ! -f "$NGX" ]; then
  echo "  !! $NGX not found"
elif grep -q 'must-revalidate' "$NGX"; then
  echo "  already applied"
else
  [ -f "$NGX.orig" ] || cp -a "$NGX" "$NGX.orig"
  cat > /tmp/.cacheblock <<'EOF'

    # Atheos serves theme/main.min.css and the generated *.min.js/css bundles from STABLE URLs
    # with no cache headers, so a CSS/JS fix stays invisible behind the browser cache until a
    # hard refresh. "no-cache" permits caching but forces revalidation: normal loads still get a
    # cheap 304, and a change is guaranteed to be picked up on the next load.
    location ~* \.(css|js)$ {
        add_header Cache-Control "no-cache, must-revalidate";
        try_files $uri =404;
    }
EOF
  php83 -r '$f=$argv[1];$b=$argv[2];$s=file_get_contents($f);
            $p=strrpos($s,"}"); if($p===false){exit(1);}
            file_put_contents($f,substr($s,0,$p).file_get_contents($b).substr($s,$p));' "$NGX" /tmp/.cacheblock
  rm -f /tmp/.cacheblock
  nginx -t >/dev/null 2>&1 && rc-service nginx reload >/dev/null 2>&1 && echo "  applied + nginx reloaded" \
    || echo "  !! nginx -t failed - restore $NGX.orig"
fi

echo "=== done ==="