#!/usr/bin/env bash
# SPDX-License-Identifier: GPL-3.0-or-later
# SPDX-FileCopyrightText: 2025 ai-ad4 and the FreePDFEditor contributors
#
# AppImage build script (§12.1). Builds a manylinux-style AppImage bundling
# Qt, Skia, ICU and the codecs. The actual bundling uses linuxdeploy +
# linuxdeploy-plugin-qt, run inside the release container; this script is the
# entry point the release pipeline (§12.5) calls.
#
# AppImage cannot use bubblewrap-style user namespaces on distros that restrict
# them, so the sandbox falls back to seccomp-only. The app reports its actual
# sandbox level in About and never silently pretends a stronger level.
set -euo pipefail

APP="FreePDFEditor"
LOWER="$(echo "$APP" | tr '[:upper:]' '[:lower:]')"
VERSION="${1:?usage: build-appimage.sh <version> <build_dir>}"
BUILD_DIR="${2:?missing build_dir}"
OUTPUT="${3:-${APP}-${VERSION}-x86_64.AppImage}"

if [[ ! -d "$BUILD_DIR" ]]; then
    echo "build dir not found: $BUILD_DIR" >&2
    exit 1
fi

if ! command -v linuxdeploy >/dev/null 2>&1; then
    echo "linuxdeploy not on PATH — install it (https://github.com/linuxdeploy/linuxdeploy)" >&2
    exit 1
fi

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
APPDIR="$BUILD_DIR/AppDir"
rm -rf "$APPDIR"
mkdir -p "$APPDIR/usr/bin"

# Copy the built binary into the AppDir layout.
cp "$BUILD_DIR/bin/freepdfeditor" "$APPDIR/usr/bin/"

# Install the desktop file, icons, metainfo into AppDir.
mkdir -p "$APPDIR/usr/share/applications" \
         "$APPDIR/usr/share/icons/hicolor/scalable/apps" \
         "$APPDIR/usr/share/metainfo"
cp "$SCRIPT_DIR/freepdfeditor.desktop" "$APPDIR/usr/share/applications/"
cp "$SCRIPT_DIR/icons/hicolor/scalable/apps/freepdfeditor.svg" \
   "$APPDIR/usr/share/icons/hicolor/scalable/apps/"
cp "$SCRIPT_DIR/org.freepdfeditor.FreePDFEditor.metainfo.xml" \
   "$APPDIR/usr/share/metainfo/"

# linuxdeploy bundles the runtime + Qt + library deps via the qt plugin.
export OUTPUT="$OUTPUT"
export UPDATE_INFORMATION="zsync|https://download.freepdfeditor.org/nightly/$LOWER-x86_64.AppImage.zsync"
export LINUXDEPLOY_OUTPUT_VERSION="$VERSION"
linuxdeploy --appdir "$APPDIR" --desktop-file \
    "$APPDIR/usr/share/applications/freepdfeditor.desktop" \
    --icon-file "$APPDIR/usr/share/icons/hicolor/scalable/apps/freepdfeditor.svg" \
    --output appimage

echo "Built $OUTPUT"