#!/usr/bin/env bash
# Launch or validate the bounded Bluetooth Battery Level slice in QEMU.

set -euo pipefail

find_uefi_firmware() {
    local candidates=(
        "/usr/share/ovmf/x64/OVMF.4m.fd"
        "/usr/share/OVMF/x64/OVMF.4m.fd"
        "/usr/share/ovmf/x64/OVMF_CODE.4m.fd"
        "/usr/share/OVMF/x64/OVMF_CODE.4m.fd"
        "/usr/share/ovmf/OVMF.fd"
        "/usr/share/OVMF/OVMF_CODE.fd"
        "/usr/share/qemu/edk2-x86_64-code.fd"
    )
    local path
    for path in "${candidates[@]}"; do
        if [[ -f "$path" ]]; then
            printf '%s\n' "$path"
            return 0
        fi
    done
    return 1
}

usage() {
    cat <<'USAGE'
Usage: test-bluetooth-qemu.sh [--check] [extra qemu args...]

Boot or validate the Red Bear OS bounded Bluetooth Battery Level slice on
redbear-bluetooth-experimental.
USAGE
}

check_mode=0
filtered_args=()

for arg in "$@"; do
    case "$arg" in
        --help|-h|help)
            usage
            exit 0
            ;;
        --check)
            check_mode=1
            ;;
        *)
            filtered_args+=("$arg")
            ;;
    esac
done

firmware="$(find_uefi_firmware)" || {
    echo "ERROR: no usable x86_64 UEFI firmware found" >&2
    exit 1
}

arch="${ARCH:-$(uname -m)}"
image="build/$arch/redbear-bluetooth-experimental/harddrive.img"
iso="build/$arch/redbear-bluetooth-experimental.iso"
extra="build/$arch/redbear-bluetooth-experimental/extra.img"
extra_qemu_args="${filtered_args[*]:-}"

if [[ -n "${QEMUFLAGS:-}" ]]; then
    combined_qemu_args="${QEMUFLAGS} ${extra_qemu_args}"
else
    combined_qemu_args="${extra_qemu_args}"
fi

boot_media=""
if [[ -f "$iso" ]]; then
    boot_media="iso"
elif [[ -f "$image" ]]; then
    boot_media="harddrive"
else
    echo "ERROR: no bootable image found ($iso or $image)" >&2
    echo "Build it first with: ./local/scripts/build-redbear.sh redbear-bluetooth-experimental" >&2
    exit 1
fi

if [[ "$boot_media" == "iso" ]]; then
    boot_args=(-cdrom "$iso")
else
    boot_args=(-drive file="$image",format=raw,if=none,id=drv0,snapshot=on -device nvme,drive=drv0,serial=NVME_SERIAL)
fi

if [[ ! -f "$extra" ]]; then
    truncate -s 1g "$extra"
fi

pcap="build/$arch/redbear-bluetooth-experimental/network.pcap"

echo "=== Red Bear OS Bluetooth QEMU Launch ==="
echo "Config: redbear-bluetooth-experimental"
echo "Image:  $image"
echo "UEFI:   $firmware"
echo
echo "Suggested in-guest checks:"
echo "  redbear-btusb --status"
echo "  redbear-btctl --status"
echo "  redbear-bluetooth-battery-check"
echo "  test-bluetooth-runtime.sh"
echo

if [[ "$check_mode" -eq 1 ]]; then
    log1="build/$arch/redbear-bluetooth-experimental/bt-check-1.log"
    attempt=1
    while true; do
        rc=0
        python3 local/scripts/qemu-login-expect.py \
            --timeout 300 \
            --log "$log1" \
            --step "expect:login:" \
            --step "send:root" \
            --step "expect:assword:" \
            --step "send:password" \
            --step "expect:Type 'help' for available commands." \
            --step "send:redbear-bluetooth-battery-check" \
            --step "expect:Red Bear OS Bluetooth Battery Check" \
            --step "expect:BLUETOOTH_BATTERY_CHECK=pass" \
            --step "send:redbear-bluetooth-battery-check" \
            --step "expect:Red Bear OS Bluetooth Battery Check" \
            --step "expect:BLUETOOTH_BATTERY_CHECK=pass" \
            --step "send:shutdown" \
            --pass_marker "BLUETOOTH_BATTERY_CHECK=pass" \
            -- \
            qemu-system-x86_64 -name "Red Bear OS x86_64" -device qemu-xhci -smp 4 -m 2048 -bios "$firmware" -chardev stdio,id=debug,signal=off,mux=on -serial chardev:debug -mon chardev:debug -machine q35 -device ich9-intel-hda -device hda-output -device virtio-net,netdev=net0 -netdev user,id=net0 -object filter-dump,id=f1,netdev=net0,file="$pcap" -display none -vga none "${boot_args[@]}" -drive file="$extra",format=raw,if=none,id=drv1 -device nvme,drive=drv1,serial=NVME_EXTRA -enable-kvm -cpu host $combined_qemu_args || rc=$?
        if [[ $rc -eq 0 ]]; then
            break
        fi
        if [[ ( $rc -eq 3 || $rc -eq 137 ) && $attempt -lt 5 ]]; then
            attempt=$((attempt + 1))
            echo "QEMU exited before completing the check; retrying (attempt $attempt/5)"
            sleep 2
            continue
        fi
        exit "$rc"
    done

    log2="build/$arch/redbear-bluetooth-experimental/bt-check-2.log"
    attempt=1
    while true; do
        rc=0
        python3 local/scripts/qemu-login-expect.py \
            --timeout 300 \
            --log "$log2" \
            --step "expect:login:" \
            --step "send:root" \
            --step "expect:assword:" \
            --step "send:password" \
            --step "expect:Type 'help' for available commands." \
            --step "send:redbear-bluetooth-battery-check" \
            --step "expect:Red Bear OS Bluetooth Battery Check" \
            --step "expect:BLUETOOTH_BATTERY_CHECK=pass" \
            --step "send:shutdown" \
            --pass_marker "BLUETOOTH_BATTERY_CHECK=pass" \
            -- \
            qemu-system-x86_64 -name "Red Bear OS x86_64" -device qemu-xhci -smp 4 -m 2048 -bios "$firmware" -chardev stdio,id=debug,signal=off,mux=on -serial chardev:debug -mon chardev:debug -machine q35 -device ich9-intel-hda -device hda-output -device virtio-net,netdev=net0 -netdev user,id=net0 -object filter-dump,id=f1,netdev=net0,file="$pcap" -display none -vga none "${boot_args[@]}" -drive file="$extra",format=raw,if=none,id=drv1 -device nvme,drive=drv1,serial=NVME_EXTRA -enable-kvm -cpu host $combined_qemu_args || rc=$?
        if [[ $rc -eq 0 ]]; then
            break
        fi
        if [[ ( $rc -eq 3 || $rc -eq 137 ) && $attempt -lt 5 ]]; then
            attempt=$((attempt + 1))
            echo "QEMU exited before completing the check; retrying (attempt $attempt/5)"
            sleep 2
            continue
        fi
        exit "$rc"
    done
    exit 0
fi

exec qemu-system-x86_64 \
  -name "Red Bear OS x86_64" \
  -device qemu-xhci \
  -smp 4 \
  -m 2048 \
  -bios "$firmware" \
  -chardev stdio,id=debug,signal=off,mux=on \
  -serial chardev:debug \
  -mon chardev=debug \
  -machine q35 \
  -device ich9-intel-hda -device hda-output \
  -device virtio-net,netdev=net0 \
  -netdev user,id=net0 \
  -object filter-dump,id=f1,netdev=net0,file="$pcap" \
  -display none -vga none \
  -drive file="$image",format=raw,if=none,id=drv0 \
  -device nvme,drive=drv0,serial=NVME_SERIAL \
  -drive file="$extra",format=raw,if=none,id=drv1 \
  -device nvme,drive=drv1,serial=NVME_EXTRA \
  -enable-kvm -cpu host \
  $combined_qemu_args