#!/usr/bin/env bash
# scripts/make-appimage.sh: build a Sheaf AppImage (+ .zsync delta-update
# file) from a prebuilt wails binary. Used by .tangled/workflows/release.yml;
# runnable locally with `just appimage` (which needs appimagetool and zsync).
#
#   bash scripts/make-appimage.sh <version> <binary> <out-dir> [zsync-url]
#
# e.g. bash scripts/make-appimage.sh 1.0.0 build/bin/sheaf dist \
#        "https://katsuricata.tngl.io/sheaf/latest/sheaf-latest-x86_64.AppImage.zsync"
#
# <zsync-url> is baked into the AppImage as update information (what
# AppImageUpdate reads). Pass it only for releases; a local build gets no
# update info, which AppImageUpdate treats as "not updatable" — the correct
# behaviour for a throwaway binary.
#
# Sheaf dynamically links the host's gtk3/webkit2gtk-4.1, so the AppImage is
# a portable launcher + desktop integration, not a bundled-runtime container:
# it runs on any distro shipping webkit2gtk-4.1, same contract as the raw
# binary release.
set -euo pipefail

VERSION="${1:?version (e.g. 1.0.0)}"
BINARY="${2:?path to built sheaf binary}"
OUT_DIR="${3:?output directory for the .AppImage}"
ZSYNC_URL="${4:-}"
REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"

APPIMAGETOOL="${APPIMAGETOOL:-appimagetool-x86_64.AppImage}"
PKG_NAME="sheaf-${VERSION}-x86_64.AppImage"

ROOT="$(mktemp -d)"; trap 'rm -rf "$ROOT"' EXIT
APPDIR="$ROOT/Sheaf.AppDir"; mkdir -p "$APPDIR"

# the hicolor PNG size set is generated from packaging/linux/sheaf.svg. Render
# it now if a from-source consumer has not run scripts/render-icons.sh yet.
if [ ! -f "$REPO_ROOT/build/icons/1024x1024/com.doubledecimal.sheaf.png" ]; then
  bash "$REPO_ROOT/scripts/render-icons.sh"
fi

# AppRun: the AppImage entry point. $APPDIR is set by the AppImage runtime;
# the fallback keeps the file runnable when the AppDir is inspected directly.
cat > "$APPDIR/AppRun" <<'EOF'
#!/bin/sh
exec "${APPDIR:-$(dirname "$(readlink -f "$0")")}/usr/bin/sheaf" "$@"
EOF
chmod 755 "$APPDIR/AppRun"

install -Dm755 "$BINARY" "$APPDIR/usr/bin/sheaf"
install -Dm644 "$REPO_ROOT/packaging/linux/com.doubledecimal.sheaf.desktop" \
  "$APPDIR/com.doubledecimal.sheaf.desktop"
install -Dm644 "$REPO_ROOT/packaging/linux/com.doubledecimal.sheaf.metainfo.xml" \
  "$APPDIR/usr/share/metainfo/com.doubledecimal.sheaf.metainfo.xml"
# icon: canonical SVG + per-size PNGs (rendered by scripts/render-icons.sh),
# named for the reverse-DNS app-id. The scalable entry is what lets Qt/KWin
# resolve the Wayland titlebar/taskbar icon at any size. The PNGs are fallback.
install -Dm644 "$REPO_ROOT/packaging/linux/sheaf.svg" \
  "$APPDIR/com.doubledecimal.sheaf.svg"
install -Dm644 "$REPO_ROOT/packaging/linux/sheaf.svg" \
  "$APPDIR/usr/share/icons/hicolor/scalable/apps/com.doubledecimal.sheaf.svg"
for s in 16 32 48 64 128 256 512 1024; do
  install -Dm644 "$REPO_ROOT/build/icons/${s}x${s}/com.doubledecimal.sheaf.png" \
    "$APPDIR/usr/share/icons/hicolor/${s}x${s}/apps/com.doubledecimal.sheaf.png"
done
# appimagetool's AppDir lint wants a 256x256 PNG at a conventional path.
install -Dm644 "$REPO_ROOT/build/icons/256x256/com.doubledecimal.sheaf.png" \
  "$APPDIR/usr/share/pixmaps/com.doubledecimal.sheaf.png"
install -Dm644 "$REPO_ROOT/LICENSE.md" \
  "$APPDIR/usr/share/licenses/sheaf/LICENSE.md"

mkdir -p "$OUT_DIR"
# appimagetool is itself an AppImage and needs FUSE; extract-and-run keeps it
# working in containers/CI without it. ARCH is required when the tool's build
# arch string does not match what it detects on the host.
export ARCH=x86_64 APPIMAGE_EXTRACT_AND_RUN=1
UPDATE_ARGS=()
if [ -n "$ZSYNC_URL" ]; then
  UPDATE_ARGS=(-u "zsync|$ZSYNC_URL")
fi
"$APPIMAGETOOL" --comp zstd "${UPDATE_ARGS[@]}" "$APPDIR" "$OUT_DIR/$PKG_NAME"

# zsyncmake is bundled inside appimagetool's AppDir and only runs when the
# update-info flag is passed. The release workflow wants the .zsync even for
# local verification, so generate it unconditionally when zsyncmake exists.
if [ -n "$ZSYNC_URL" ] && command -v zsyncmake >/dev/null 2>&1; then
  (cd "$OUT_DIR" && zsyncmake -u "$PKG_NAME" "$PKG_NAME")
fi

echo "built $OUT_DIR/$PKG_NAME"
[ -z "$ZSYNC_URL" ] || echo "update info: zsync|$ZSYNC_URL"