#!/bin/bash
# test-local-storage.sh — Verify PVC with local-path provisioner works
# Usage: ./test/integration/test-local-storage.sh <iso-path>
# Requires: kubectl on host, QEMU
set -euo pipefail

ISO="${1:?Usage: $0 <path-to-iso>}"
TIMEOUT_K8S=${TIMEOUT_K8S:-300}
TIMEOUT_PVC=${TIMEOUT_PVC:-120}
API_PORT=6443

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
. "$SCRIPT_DIR/../lib/qemu-helpers.sh"

DATA_DISK=$(mktemp /tmp/kubesolo-data-XXXXXX.img)
dd if=/dev/zero of="$DATA_DISK" bs=1M count=2048 2>/dev/null
mkfs.ext4 -q -L KSOLODATA "$DATA_DISK" 2>/dev/null

SERIAL_LOG=$(mktemp /tmp/kubesolo-storage-XXXXXX.log)

QEMU_PID=""
EXTRACT_DIR=""
KUBECTL="kubectl --server=https://localhost:${API_PORT} --insecure-skip-tls-verify"

cleanup() {
    # Clean up K8s resources
    $KUBECTL delete pod test-storage --grace-period=0 --force 2>/dev/null || true
    $KUBECTL delete pvc test-pvc 2>/dev/null || true
    [ -n "$QEMU_PID" ] && kill "$QEMU_PID" 2>/dev/null || true
    rm -f "$DATA_DISK" "$SERIAL_LOG"
    [ -n "$EXTRACT_DIR" ] && rm -rf "$EXTRACT_DIR"
}
trap cleanup EXIT

echo "==> Local storage test: $ISO"

# Extract kernel from ISO
EXTRACT_DIR="$(mktemp -d /tmp/kubesolo-extract-XXXXXX)"
extract_kernel_from_iso "$ISO" "$EXTRACT_DIR"

KVM_FLAG=$(detect_kvm)

# Launch QEMU
# shellcheck disable=SC2086
qemu-system-x86_64 \
    -m 2048 -smp 2 \
    -nographic \
    $KVM_FLAG \
    -kernel "$VMLINUZ" \
    -initrd "$INITRAMFS" \
    -drive "file=$DATA_DISK,format=raw,if=virtio" \
    -net "nic,model=virtio" \
    -net "user,hostfwd=tcp::${API_PORT}-:6443" \
    -serial "file:$SERIAL_LOG" \
    -append "console=ttyS0,115200n8 kubesolo.data=/dev/vda" \
    &
QEMU_PID=$!

# Wait for K8s API
echo "    Waiting for K8s API..."
ELAPSED=0
while [ "$ELAPSED" -lt "$TIMEOUT_K8S" ]; do
    if $KUBECTL get nodes 2>/dev/null | grep -q "Ready"; then
        break
    fi
    sleep 5
    ELAPSED=$((ELAPSED + 5))
done

if [ "$ELAPSED" -ge "$TIMEOUT_K8S" ]; then
    echo "==> FAIL: K8s not ready within ${TIMEOUT_K8S}s"
    exit 1
fi
echo "    K8s ready (${ELAPSED}s)"

# Create PVC
echo "==> Creating PersistentVolumeClaim..."
$KUBECTL apply -f - << 'YAML'
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: test-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 64Mi
YAML

# Create pod that uses the PVC
echo "==> Creating pod with PVC..."
$KUBECTL apply -f - << 'YAML'
apiVersion: v1
kind: Pod
metadata:
  name: test-storage
spec:
  containers:
    - name: writer
      image: busybox:latest
      command: ["sh", "-c", "echo 'kubesolo-storage-test' > /data/test.txt && sleep 3600"]
      volumeMounts:
        - name: data
          mountPath: /data
  volumes:
    - name: data
      persistentVolumeClaim:
        claimName: test-pvc
YAML

# Wait for pod Running
echo "    Waiting for storage pod..."
ELAPSED=0
STATUS=""
while [ "$ELAPSED" -lt "$TIMEOUT_PVC" ]; do
    STATUS=$($KUBECTL get pod test-storage -o jsonpath='{.status.phase}' 2>/dev/null || echo "")
    if [ "$STATUS" = "Running" ]; then
        break
    fi
    sleep 5
    ELAPSED=$((ELAPSED + 5))
done

if [ "$STATUS" != "Running" ]; then
    echo "==> FAIL: Storage pod did not reach Running (status: $STATUS)"
    $KUBECTL describe pod test-storage 2>/dev/null | tail -20 || true
    exit 1
fi

# Verify data was written
sleep 3
DATA=$($KUBECTL exec test-storage -- cat /data/test.txt 2>/dev/null || echo "")
if [ "$DATA" = "kubesolo-storage-test" ]; then
    echo "==> PASS: Local storage provisioning works"
    echo "    PVC bound, pod running, data written and read back successfully"
    exit 0
else
    echo "==> FAIL: Data verification failed (got: '$DATA')"
    exit 1
fi