#!/bin/bash
set -e

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
OUTPUT_TARGET="${1:-$SCRIPT_DIR}"
mkdir -p "$OUTPUT_TARGET"
OUTPUT_DIR="$(cd "$OUTPUT_TARGET" && pwd)"

MOC_BIN=""
MOC_CANDIDATES=(
    /usr/lib/qt6/moc
    /usr/lib/qt6/libexec/moc
    /usr/libexec/qt6/moc
    /usr/lib64/qt6/libexec/moc
    /usr/lib/qt6/bin/moc
    /usr/lib64/qt6/bin/moc
    moc-qt6
    moc6
    moc
)

for candidate in "${MOC_CANDIDATES[@]}"; do
    TARGET_BIN=""
    if [ -x "$candidate" ]; then
        TARGET_BIN="$candidate"
    elif command -v "$candidate" &>/dev/null; then
        TARGET_BIN="$(command -v "$candidate")"
    fi

    if [ -n "$TARGET_BIN" ]; then
        VER_OUT="$("$TARGET_BIN" -v 2>&1 || true)"
        if [[ "$VER_OUT" =~ moc\ 6\. ]] || [[ "$VER_OUT" =~ Qt\ 6\. ]] || [[ "$VER_OUT" =~ 6\.[0-9]+ ]]; then
            MOC_BIN="$TARGET_BIN"
            break
        fi
    fi
done

if [ -z "$MOC_BIN" ]; then
    echo "Warning: Qt6 moc compiler not found (detected Qt5 moc or no moc)."
    echo "On Arch Linux, please ensure Qt6 development tools are installed:"
    echo "  sudo pacman -S qt6-base kf6-purpose kf6-kcoreaddons"
    exit 0
fi

# Detect header search paths
INC_ARGS=()

for path in \
    /usr/include/KF6/Purpose \
    /usr/include/KF6/KCoreAddons \
    /usr/include/KF6 \
    /usr/include/purpose \
    /tmp/purpose_devel/usr/include/KF6/Purpose \
    /tmp/purpose_devel/usr/include/KF6; do
    if [ -d "$path" ]; then
        INC_ARGS+=("-I$path")
    fi
done

for path in \
    /usr/include/qt6 \
    /usr/include/qt6/QtCore \
    /usr/include/qt6/QtGui \
    /usr/include/x86_64-linux-gnu/qt6 \
    /usr/include/x86_64-linux-gnu/qt6/QtCore \
    /usr/include/x86_64-linux-gnu/qt6/QtGui; do
    if [ -d "$path" ]; then
        INC_ARGS+=("-I$path")
    fi
done

if [ ${#INC_ARGS[@]} -eq 0 ]; then
    echo "Warning: KF6 Purpose/Qt6 headers not found. Skipping Purpose plugin compilation."
    echo "On Arch Linux, install development packages: sudo pacman -S kf6-purpose kf6-kcoreaddons qt6-base"
    exit 0
fi

LIB_ARGS=()
for lib_path in \
    /usr/lib/libKF6Purpose.so.6 /usr/lib64/libKF6Purpose.so.6 /usr/lib/x86_64-linux-gnu/libKF6Purpose.so.6 \
    /usr/lib/libKF6Purpose.so /usr/lib64/libKF6Purpose.so /usr/lib/x86_64-linux-gnu/libKF6Purpose.so; do
    if [ -f "$lib_path" ]; then
        LIB_ARGS+=("$lib_path")
        break
    fi
done

for lib_path in \
    /usr/lib/libKF6CoreAddons.so.6 /usr/lib64/libKF6CoreAddons.so.6 /usr/lib/x86_64-linux-gnu/libKF6CoreAddons.so.6 \
    /usr/lib/libKF6CoreAddons.so /usr/lib64/libKF6CoreAddons.so /usr/lib/x86_64-linux-gnu/libKF6CoreAddons.so; do
    if [ -f "$lib_path" ]; then
        LIB_ARGS+=("$lib_path")
        break
    fi
done

BUILD_DIR="$(mktemp -d)"
trap 'rm -rf "$BUILD_DIR"' EXIT

cp "$SCRIPT_DIR/f0ckmplugin.cpp" "$SCRIPT_DIR/f0ckmplugin.json" "$BUILD_DIR/"

pushd "$BUILD_DIR" >/dev/null
"$MOC_BIN" "${INC_ARGS[@]}" f0ckmplugin.cpp -o f0ckmplugin.moc
g++ -shared -fPIC -O2 f0ckmplugin.cpp \
    "${INC_ARGS[@]}" \
    "${LIB_ARGS[@]}" \
    -lQt6Core \
    -o "$OUTPUT_DIR/f0ckmpurposeplugin.so"
popd >/dev/null

echo "Successfully built f0ckmpurposeplugin.so at $OUTPUT_DIR/f0ckmpurposeplugin.so"