#!/bin/sh
# Praxis — Create a Proxmox LXC container from a template via REST API.
#
# Uses the POST /nodes/{node}/lxc endpoint with ostemplate=<volid>
# (create-from-template) instead of the storage clone endpoint. The
# clone endpoint rejects API tokens (`user != root@pam` guard), but
# the create endpoint accepts them — so this path works end-to-end
# with a PVEAPIToken. Pure REST, no SSH.
#
# Env: PROXMOX_API_URL, PROXMOX_API_TOKEN, PROXMOX_NODE,
#      PROXMOX_STORAGE, PROXMOX_TEMPLATE_VOLID
# Args: $1 = target VMID (from pve_nextid)
# Stdout: the new VMID (integer)
# Exit: 0 on success, 1 on failure

set -eu

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
# shellcheck source=api.sh disable=SC1091
. "${SCRIPT_DIR}/api.sh"

pve_env PROXMOX_API_URL PROXMOX_API_TOKEN PROXMOX_NODE \
    PROXMOX_STORAGE PROXMOX_TEMPLATE_VOLID

newid="${1:?usage: lxc-clone.sh <newid>}"
node="${PROXMOX_NODE}"
storage="${PROXMOX_STORAGE}"
template_volid="${PROXMOX_TEMPLATE_VOLID}"

# POST /nodes/{node}/lxc — create a CT from a template.
# Body (form-encoded): vmid, ostemplate, hostname, storage, rootfs, ...
# Returns: UPID (async task). Poll until done.
create_path="/nodes/${node}/lxc"
hostname="${PRAXIS_HOSTNAME:-praxis}"

echo "lxc-clone: creating VMID ${newid} from ${template_volid}" >&2
upid=$(pve_curl POST "$create_path" \
    "vmid=${newid}" \
    "ostemplate=${template_volid}" \
    "hostname=${hostname}" \
    "storage=${storage}" \
    "rootfs=${storage}:16" \
    # v0.4: 6144MB default (was 4096 in v0.2). Postgres ~400MB + praxis
    # ~500MB + Docker daemon ~200MB + build headroom ~1GB + margin
    # (REQ-NFR-MT-01). Override with PROXMOX_MEMORY_MB if needed.
    "memory=${PROXMOX_MEMORY_MB:-6144}" \
    "net0=name=eth0,bridge=vmbr0,ip=dhcp" \
    "arch=amd64" \
    "features=nesting=1")

if [ -z "$upid" ] || [ "$upid" = "null" ]; then
    echo "lxc-clone: failed to start create (empty UPID)" >&2
    exit 1
fi

echo "lxc-clone: polling create task ${upid}" >&2
pve_poll "$upid"

echo "lxc-clone: CT ${newid} created from ${template_volid}" >&2
printf '%s\n' "$newid"