#!/usr/bin/env bash
set -euo pipefail

WORK_DIR="${MONTANAOS_WORK:-$HOME/montanaos-build}"
DEVICE="${DEVICE:-komodo}"
MONTANAOS_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
LOCK_FILE="$MONTANAOS_ROOT/MONTANAOS_VERSIONS.lock"

if [[ ! -f "$LOCK_FILE" ]]; then
    echo "ERROR: $LOCK_FILE not found. Phase 1 of ROADMAP must close first."
    exit 1
fi

cd "$WORK_DIR/grapheneos"

KERNEL_DIR="kernel/google/$DEVICE"
DEVICE_DIR="device/google/$DEVICE"

if [[ ! -d "$KERNEL_DIR" ]]; then
    echo "ERROR: kernel directory not found: $KERNEL_DIR"
    echo "Did you run sync-grapheneos.sh successfully?"
    exit 1
fi

for patch in "$MONTANAOS_ROOT/kernel/patches"/*.patch; do
    [[ -f "$patch" ]] || continue
    echo "Checking $(basename "$patch") against $KERNEL_DIR"
    if git -C "$KERNEL_DIR" apply --check "$patch" 2>/dev/null; then
        git -C "$KERNEL_DIR" apply "$patch"
        echo "  applied"
    else
        echo "  WARN: $(basename "$patch") did not apply cleanly, manual merge required"
        echo "  Note: until Phase 2 of ROADMAP closes, kernel patches are sketches,"
        echo "  not expected to apply against current upstream."
    fi
done

cp "$MONTANAOS_ROOT/system/init.montana-node.rc"  "$DEVICE_DIR/init.montana-node.rc"
cp "$MONTANAOS_ROOT/system/montana-watchdog.sh"   "$DEVICE_DIR/montana-watchdog.sh"

DEVICE_MK="$DEVICE_DIR/device.mk"
if ! grep -q "init.montana-node.rc" "$DEVICE_MK" 2>/dev/null; then
    cat >> "$DEVICE_MK" <<MK

PRODUCT_COPY_FILES += \\
    \$(LOCAL_PATH)/init.montana-node.rc:system/etc/init/montana-node.rc \\
    \$(LOCAL_PATH)/montana-watchdog.sh:system/bin/montana-watchdog.sh
MK
fi

echo
echo "MontanaOS patches applied to GrapheneOS tree"
echo "Next step: ./scripts/build-montanaos.sh $DEVICE"