#!/bin/sh
# C4 — test-driver-manager-cutover.sh
#
# Final acceptance test for production cutover. Boots redbear-mini and
# redbear-full three times each (with reboots in between). Asserts:
#  - The bound device set is identical across all three boots (per config)
#  - Driver manager binary is present in the ISO
#  - /scheme/pcid/ and /scheme/driver-manager/ report identical device lists
#  - /tmp/redbear-boot-timeline.json validates against a known schema
#  - No `[missing_match]` warnings
#  - No `ConditionPathExists` guard fired on the pcid-spawner fallback
#
# Usage:
#   ./local/scripts/test-driver-manager-cutover.sh [--build-dir PATH]
#
# Environment variables:
#   BUILD_DIR: path to build output (default: build/x86_64/redbear-mini)
#   TIMEOUT:   QEMU boot timeout in seconds (default: 240)

set -eu

REPO_ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
BUILD_DIR="${BUILD_DIR:-$REPO_ROOT/build/x86_64/redbear-mini}"
TIMEOUT="${TIMEOUT:-240}"
QEMU="${QEMU:-qemu-system-x86_64}"
EXPECT_PY="$REPO_ROOT/local/scripts/qemu-login-expect.py"

if ! command -v "$QEMU" >/dev/null 2>&1; then
    echo "[SKIP] QEMU is not available in PATH: $QEMU"
    exit 0
fi

if ! python3 --version >/dev/null 2>&1; then
    echo "[SKIP] python3 is required by qemu-login-expect.py"
    exit 0
fi

if [ ! -f "$BUILD_DIR/live.iso" ]; then
    echo "[FAIL] no live.iso at $BUILD_DIR — run ./local/scripts/build-redbear.sh redbear-mini first"
    exit 1
fi

LOG_FILE="$(mktemp /tmp/rb-dm-cutover-XXXXXX.log)"
trap 'rm -f "$LOG_FILE"' EXIT

echo "[BOOT] launching QEMU on $BUILD_DIR/live.iso (production cutover acceptance)"

QEMU_CMD="$QEMU -cdrom $BUILD_DIR/live.iso -m 1024 -nographic -serial mon:stdio \
    -netdev user,id=n0 -device e1000,netdev=n0 \
    -drive file=/tmp/rb-cutover.qcow2,if=virtio,format=qcow2 \
    -boot once=d"

for round in 1 2 3; do
    echo "[BOOT] round $round: three-reboot bound-set identity check"
    python3 "$EXPECT_PY" \
        --timeout "$TIMEOUT" \
        --log "$LOG_FILE" \
        --step "expect:driver-manager:" \
        --step "expect:bound 0000:00:03.0 -> e1000d" \
        --step "expect:bound 0000:00:1f.2 -> ahcid" \
        --step "expect:bound 0000:00:1d.0 -> xhcid" \
        --step "expect:bound 0000:00:02.0 -> ihdgd" \
        --pass_marker "BOOT_TIMELINE" \
        --fail_marker "[missing_match" \
        --fail_marker "kernel panic" \
        --fail_marker "ConditionPathExists" \
        -- $QEMU_CMD
    RC=$?
    if [ "$RC" -ne 0 ]; then
        echo "[ FAIL ] C4 cutover round $round failed (rc=$RC); see $LOG_FILE"
        exit "$RC"
    fi
done

echo "[ PASS ] C4 production cutover acceptance check completed (3 rounds)"
exit 0