#!/usr/bin/env bash
# Scaffold a new ISOLATED client stack from _template/.
#
# Usage: ./new-client.sh <slug> <domain> [source-site-dir]
#   ./new-client.sh happynails happynails.de ../../templates/landing/preview-happynails
#
# Creates deploy/clients/<slug>/ with its own .env + site/, then prints the
# Caddy block and the deploy command. Run it from deploy/clients/.
set -euo pipefail
cd "$(dirname "$0")"

SLUG="${1:?usage: new-client.sh <slug> <domain> [source-site-dir]}"
DOMAIN="${2:?domain required (e.g. happynails.de)}"
SRC="${3:-}"

[[ "$SLUG" =~ ^[a-z0-9-]+$ ]] || { echo "slug must be lowercase letters/digits/dashes"; exit 1; }
[ -e "$SLUG" ] && { echo "client '$SLUG' already exists at deploy/clients/$SLUG"; exit 1; }

cp -r _template "$SLUG"
cat > "$SLUG/.env" <<EOF
CLIENT_SLUG=$SLUG
CLIENT_DOMAIN=$DOMAIN
EOF

if [ -n "$SRC" ]; then
  [ -d "$SRC" ] || { echo "source dir '$SRC' not found"; exit 1; }
  rm -f "$SLUG"/site/*.html
  cp -r "$SRC"/. "$SLUG"/site/
  echo "Seeded site/ from $SRC"
fi

cat <<EOF

✓ Created deploy/clients/$SLUG

1) Add this block to the homelab Caddyfile, then reload Caddy:
   docker exec caddy caddy reload --config /etc/caddy/Caddyfile

   $DOMAIN {
       reverse_proxy client-$SLUG:80
       encode zstd gzip
   }

2) DNS: a *.mivanchenko.de subdomain already resolves (wildcard) — nothing to do.
   For a client-owned domain, add their A record $DOMAIN -> 188.193.49.3.

3) Deploy the stack:
   scp -r $SLUG mivanchenko@mivanchenko.de:/home/mivanchenko/clients/
   ssh mivanchenko@mivanchenko.de 'cd ~/clients/$SLUG && docker compose up -d'

Remove this client later (isolated — touches nothing else):
   ssh mivanchenko@mivanchenko.de 'cd ~/clients/$SLUG && docker compose down'
EOF