#!/usr/bin/env bash
# `make plan ENV=<env>` — show what would be deployed for the given env.
#
# Merges manifests/ with overlays/<env>/overlay.toml and writes the resolved
# service set to .orca-out/<env>/. Does NOT contact a cluster.
#
# Behavior in M1.1: the merge is a passthrough (overlays are placeholders).
# A real merge that resolves per-env image tags and replica counts will land
# alongside the first env-specific delta (M1.2 or later).

set -euo pipefail

ENV="${ENV:?usage: make plan ENV=<dev|stage|prod>}"
case "$ENV" in dev|stage|prod) ;; *) echo "unknown env: $ENV" >&2; exit 2;; esac

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
cd "$ROOT"
OUT="$ROOT/.orca-out/$ENV"
rm -rf "$OUT"
mkdir -p "$OUT"

OVERLAY="overlays/$ENV/overlay.toml"
[ -f "$OVERLAY" ] || { echo "missing $OVERLAY" >&2; exit 1; }

# Read include_dirs from overlay; fall back to all VMs (dev default).
INCLUDE_DIRS=$(python3 - "$OVERLAY" <<'PY'
import sys, tomllib
data = tomllib.load(open(sys.argv[1], 'rb'))
dirs = data.get('deploy', {}).get('include_dirs')
if dirs is None:
    dirs = ['manifests/vm-edge', 'manifests/vm-control', 'manifests/vm-data', 'manifests/stage']
print('\n'.join(dirs))
PY
)

echo "=== plan ENV=$ENV ==="
echo "overlay:       $OVERLAY"
echo "include_dirs:"
echo "$INCLUDE_DIRS" | sed 's/^/  /'
echo

count=0
while IFS= read -r dir; do
  [ -d "$dir" ] || continue
  for tml in "$dir"/*.toml; do
    [ -e "$tml" ] || continue
    rel="${tml#manifests/}"
    dest="$OUT/$rel"
    mkdir -p "$(dirname "$dest")"
    cp "$tml" "$dest"
    count=$((count+1))
  done
done <<< "$INCLUDE_DIRS"

echo "→ wrote $count resolved manifests to .orca-out/$ENV/"
echo "→ apply with: ORCA_API_URL=<url> make apply ENV=$ENV"