#!/usr/bin/env bash
#
# Standalone, reproducible build script for "DB Browser for SQLite" (sqlitebrowser)
# on macOS. Produces a fully self-contained "DB Browser for SQLite.app".
#
# Everything the build needs lives inside this script. On a fresh `git clone`
# into which only build.sh (and launch.sh) are copied, `bash build.sh` produces
# the .app.
#
# Project facts that shape this script:
#   * It is a Qt5 + CMake project (find_package(Qt5 REQUIRED ...)); the code uses
#     QDesktopWidget / QRegExp / QTextCodec, which are removed in Qt6, so we build
#     against Homebrew's keg-only `qt@5` (5.15.x) rather than the system Qt6.
#   * `find_package(SQLite3)` must resolve to a SQLite header that declares
#     sqlite3_load_extension(); the macOS SDK header omits it, so we point
#     SQLite3_INCLUDE_DIR/LIBRARY at Homebrew's `sqlite`.
#   * The bundled libs (qscintilla/qhexedit/qcustomplot) declare
#     cmake_minimum_required(<3.5), which CMake 4.x rejects; we pass
#     -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to configure them anyway.
#   * src/app.plist leaves @EXECUTABLE@/@ICON@ for CMake to fill, but no CMake
#     variables feed them, so the generated Info.plist has empty
#     CFBundleExecutable/CFBundleIconFile. We fix those post-build (build
#     artifact only -- no source edit).
#   * macdeployqt bundles the Qt frameworks + the required cocoa platform plugin
#     and rewrites linkage to @executable_path, yielding a portable .app.
#
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
cd "$SCRIPT_DIR"

APP_NAME="DB Browser for SQLite"
BUILD_DIR="$SCRIPT_DIR/build"

# ---------------------------------------------------------------------------
# 0. Ensure Homebrew is on PATH (works on both Apple Silicon and Intel)
# ---------------------------------------------------------------------------
if ! command -v brew >/dev/null 2>&1; then
    for b in /opt/homebrew/bin/brew /usr/local/bin/brew; do
        if [ -x "$b" ]; then eval "$("$b" shellenv)"; break; fi
    done
fi
if ! command -v brew >/dev/null 2>&1; then
    echo "ERROR: Homebrew is required but was not found on PATH." >&2
    exit 1
fi

# ---------------------------------------------------------------------------
# 1. Dependencies (idempotent -- brew install is a no-op if already present)
# ---------------------------------------------------------------------------
echo ">>> Installing/verifying build dependencies ..."
for formula in cmake ninja sqlite; do
    brew list --versions "$formula" >/dev/null 2>&1 || brew install "$formula"
done
if ! brew list --versions qt@5 >/dev/null 2>&1; then
    # The VM image carries Homebrew's modular Qt 6 formulae. They link the same executable names
    # as the keg-only Qt 5 package and make `brew install qt@5` abort before the build starts.
    for formula in $(brew list --formula | grep -E '^qt(base|3d|charts|connectivity|datavis3d|declarative|multimedia|networkauth|positioning|quick3d|remoteobjects|scxml|sensors|serialport|speech|svg|tools|webchannel|websockets)$' || true); do
        brew unlink "$formula" >/dev/null 2>&1 || true
    done
    brew install qt@5
fi

QT5_PREFIX="$(brew --prefix qt@5)"
SQLITE_PREFIX="$(brew --prefix sqlite)"

if [ ! -x "$QT5_PREFIX/bin/qmake" ]; then
    echo "ERROR: qt@5 not found at $QT5_PREFIX" >&2
    exit 1
fi
echo ">>> Using Qt5 at:    $QT5_PREFIX"
echo ">>> Using SQLite at: $SQLITE_PREFIX"

# ---------------------------------------------------------------------------
# 2. Configure (CMake / Ninja, Release, native arch)
# ---------------------------------------------------------------------------
echo ">>> Configuring ..."
rm -rf "$BUILD_DIR"
mkdir -p "$BUILD_DIR"

cmake -S "$SCRIPT_DIR" -B "$BUILD_DIR" -G Ninja \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_POLICY_VERSION_MINIMUM=3.5 \
    -DCMAKE_PREFIX_PATH="$QT5_PREFIX" \
    -DSQLite3_INCLUDE_DIR="$SQLITE_PREFIX/include" \
    -DSQLite3_LIBRARY="$SQLITE_PREFIX/lib/libsqlite3.dylib"

# ---------------------------------------------------------------------------
# 3. Build
# ---------------------------------------------------------------------------
echo ">>> Building ..."
cmake --build "$BUILD_DIR" -j "$(sysctl -n hw.ncpu)"

APP="$BUILD_DIR/$APP_NAME.app"
if [ ! -d "$APP" ]; then
    echo "ERROR: expected app bundle not produced: $APP" >&2
    exit 1
fi

# ---------------------------------------------------------------------------
# 4. Fix bundle metadata that CMake left blank (build artifact, not source)
#    - CFBundleExecutable was configured from @EXECUTABLE@ -> empty
#    - CFBundleIconFile   was configured from @ICON@       -> empty
# ---------------------------------------------------------------------------
echo ">>> Fixing Info.plist and bundling icon ..."
PLIST="$APP/Contents/Info.plist"
/usr/libexec/PlistBuddy -c "Set :CFBundleExecutable $APP_NAME" "$PLIST" 2>/dev/null \
    || /usr/libexec/PlistBuddy -c "Add :CFBundleExecutable string $APP_NAME" "$PLIST"

mkdir -p "$APP/Contents/Resources"
if [ -f "$SCRIPT_DIR/src/macapp.icns" ]; then
    cp -f "$SCRIPT_DIR/src/macapp.icns" "$APP/Contents/Resources/macapp.icns"
    /usr/libexec/PlistBuddy -c "Set :CFBundleIconFile macapp.icns" "$PLIST" 2>/dev/null \
        || /usr/libexec/PlistBuddy -c "Add :CFBundleIconFile string macapp.icns" "$PLIST"
fi

# ---------------------------------------------------------------------------
# 5. Bundle Qt frameworks + plugins -> self-contained, relocatable .app
# ---------------------------------------------------------------------------
echo ">>> Running macdeployqt ..."
"$QT5_PREFIX/bin/macdeployqt" "$APP" -verbose=1

# ---------------------------------------------------------------------------
# 6. Deliver the .app to the output directory
# ---------------------------------------------------------------------------
OUT_DIR="${APP_OUTPUT_DIR:-$SCRIPT_DIR}"
mkdir -p "$OUT_DIR"
OUT_APP="$OUT_DIR/$APP_NAME.app"
# Only copy when the output location differs from where it was built.
if [ "$(cd "$OUT_DIR" && pwd)" != "$BUILD_DIR" ]; then
    rm -rf "$OUT_APP"
    ditto "$APP" "$OUT_APP"
fi

echo ""
echo ">>> BUILD SUCCEEDED"
echo ">>> App bundle: $OUT_APP"