#!/bin/bash
# test-k8s-ready.sh — Verify K8s node reaches Ready state
# Usage: ./test/integration/test-k8s-ready.sh <iso-path>
# Requires: kubectl on host, QEMU with port forwarding
set -euo pipefail

ISO="${1:?Usage: $0 <path-to-iso>}"
TIMEOUT_K8S=${TIMEOUT_K8S:-300}
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=1024 2>/dev/null
mkfs.ext4 -q -L KSOLODATA "$DATA_DISK" 2>/dev/null

QEMU_PID=""
EXTRACT_DIR=""

cleanup() {
    [ -n "$QEMU_PID" ] && kill "$QEMU_PID" 2>/dev/null || true
    rm -f "$DATA_DISK"
    [ -n "$EXTRACT_DIR" ] && rm -rf "$EXTRACT_DIR"
}
trap cleanup EXIT

echo "==> K8s readiness test: $ISO"

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

KVM_FLAG=$(detect_kvm)
[ -n "$KVM_FLAG" ] && echo "    KVM acceleration: enabled"

# Launch QEMU with API port forwarded
# 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::${API_PORT}-:6443" \
    -append "console=ttyS0,115200n8 kubesolo.data=/dev/vda" \
    &
QEMU_PID=$!

# Wait for API server
echo "    Waiting for K8s API on localhost:${API_PORT}..."
ELAPSED=0
while [ "$ELAPSED" -lt "$TIMEOUT_K8S" ]; do
    if kubectl --kubeconfig=/dev/null \
        --server="https://localhost:${API_PORT}" \
        --insecure-skip-tls-verify \
        get nodes 2>/dev/null | grep -q "Ready"; then
        echo ""
        echo "==> PASS: K8s node is Ready (${ELAPSED}s)"

        # Bonus: try deploying a pod
        echo "    Deploying test pod..."
        kubectl --server="https://localhost:${API_PORT}" --insecure-skip-tls-verify \
            run test-nginx --image=nginx:alpine --restart=Never 2>/dev/null || true

        sleep 10
        if kubectl --server="https://localhost:${API_PORT}" --insecure-skip-tls-verify \
            get pod test-nginx 2>/dev/null | grep -q "Running"; then
            echo "==> PASS: Test pod is Running"
        else
            echo "==> WARN: Test pod not Running (may need more time or image pull)"
        fi
        exit 0
    fi
    sleep 5
    ELAPSED=$((ELAPSED + 5))
    printf "\r    Elapsed: %ds / %ds" "$ELAPSED" "$TIMEOUT_K8S"
done

echo ""
echo "==> FAIL: K8s node did not reach Ready within ${TIMEOUT_K8S}s"
exit 1