#!/usr/bin/env bash
# Create LXC 5700 (dev-vm): shared development environment for four users, Cursor Remote SSH,
# and private GitOps (Gitea). Large disk for all projects from /home/intlc/projects.
#
# Usage: ./scripts/create-dev-vm-5700.sh [--dry-run]
#   --dry-run  Print commands only, do not create.
#
# Overrides (env): PROXMOX_HOST, STORAGE, DEV_VM_DISK_GB, TEMPLATE
# See: docs/04-configuration/DEV_VM_GITOPS_PLAN.md

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
source "${PROJECT_ROOT}/config/ip-addresses.conf" 2>/dev/null || true

VMID=5700
HOST="${PROXMOX_HOST:-${PROXMOX_R630_01:-192.168.11.11}}"
IP="${IP_DEV_VM:-192.168.11.59}"
GATEWAY="${NETWORK_GATEWAY:-192.168.11.1}"
NETWORK="${NETWORK:-vmbr0}"
STORAGE="${STORAGE:-local-lvm}"
# Prefer Ubuntu 22.04 for dev (better tooling); fallback Debian 12
TEMPLATE="${TEMPLATE:-local:vztmpl/ubuntu-22.04-standard_22.04-1_amd64.tar.zst}"
DEV_VM_DISK_GB="${DEV_VM_DISK_GB:-400}"
MEMORY_MB=16384
CORES=4
SSH_OPTS="-o ConnectTimeout=15 -o StrictHostKeyChecking=accept-new"

DRY_RUN=false
[[ "${1:-}" == "--dry-run" ]] && DRY_RUN=true

echo "=== Dev VM (5700) — Create ==="
echo "Host: $HOST | IP: $IP | Disk: ${DEV_VM_DISK_GB}G | RAM: ${MEMORY_MB}MB | Cores: $CORES"
echo "Storage: $STORAGE | Template: $TEMPLATE"
echo ""

# Check template exists on host (try Ubuntu first, then Debian)
resolve_template() {
  local node
  node=$(ssh $SSH_OPTS root@$HOST "hostname" 2>/dev/null || true)
  if ssh $SSH_OPTS root@$HOST "pveam list local 2>/dev/null | grep -q 'ubuntu-22.04-standard'" 2>/dev/null; then
    echo "local:vztmpl/ubuntu-22.04-standard_22.04-1_amd64.tar.zst"
  elif ssh $SSH_OPTS root@$HOST "pveam list local 2>/dev/null | grep -q 'debian-12-standard'" 2>/dev/null; then
    echo "local:vztmpl/debian-12-standard_12.12-1_amd64.tar.zst"
  else
    echo "$TEMPLATE"
  fi
}

if $DRY_RUN; then
  echo "[DRY-RUN] Would create LXC $VMID on $HOST with:"
  echo "  hostname=dev-vm, memory=${MEMORY_MB}, cores=$CORES, rootfs=$STORAGE:${DEV_VM_DISK_GB}, ip=$IP/24, gw=$GATEWAY"
  echo "  Run without --dry-run to create."
  exit 0
fi

if ssh $SSH_OPTS root@$HOST "pct list 2>/dev/null" | grep -q " $VMID "; then
  echo "Container $VMID already exists on $HOST."
  read -p "Stop and destroy it, then recreate? [yN] " r
  [[ "${r,,}" != "y" ]] && exit 0
  ssh $SSH_OPTS root@$HOST "pct stop $VMID 2>/dev/null || true; pct destroy $VMID --purge 1" 2>/dev/null || true
  sleep 2
fi

RESOLVED_TEMPLATE=$(resolve_template)
echo "Using template: $RESOLVED_TEMPLATE"
echo "Creating CT $VMID (dev-vm)..."
ssh $SSH_OPTS root@$HOST "pct create $VMID $RESOLVED_TEMPLATE \
  --hostname dev-vm \
  --memory $MEMORY_MB \
  --cores $CORES \
  --rootfs $STORAGE:${DEV_VM_DISK_GB} \
  --net0 name=eth0,bridge=$NETWORK,ip=$IP/24,gw=$GATEWAY \
  --nameserver $DNS_PRIMARY \
  --description 'Shared dev VM: 4 users, Cursor, private Gitea (GitOps). See docs/04-configuration/DEV_VM_GITOPS_PLAN.md' \
  --start 1 \
  --onboot 1 \
  --unprivileged 0"

echo "Waiting for container to boot..."
sleep 15
echo "Container 5700 (dev-vm) is running at $IP."
echo ""
echo "Next steps:"
echo "  1. Run setup script for users + Gitea: bash scripts/setup-dev-vm-users-and-gitea.sh"
echo "  2. Rsync projects: rsync -avz /home/intlc/projects/ dev1@$IP:/srv/projects/"
echo "  3. In Cursor: Remote-SSH → dev1@$IP (after adding SSH keys)"
echo "See: docs/04-configuration/DEV_VM_GITOPS_PLAN.md"