#!/usr/bin/env bash
# Deploy a git ref of the bot to a server. Used by hand and by CD (.gitea/workflows/deploy.yml).
#   infra/deploy/deploy.sh <dev|prod> [git-ref]      default ref: HEAD
# Env: DEPLOY_HOST  (default tgit-deploy@72.56.247.166 — the vobot host; any Docker host works)
#      DEPLOY_SSH_OPTS (extra ssh/scp options, e.g. -i key)
# Server layout: /srv/tgit/<env>/{.env, app/, app.old/, REVISION}; secrets live only in /srv/tgit/<env>/.env.
# The host drops some ssh connections — every remote step is retried, and each one is safe to repeat.
set -euo pipefail
ENV=${1:?usage: deploy.sh <dev|prod> [ref]}
REF=${2:-HEAD}
case "$ENV" in dev | prod) ;; *) echo "env must be dev or prod" >&2; exit 2 ;; esac
HOST=${DEPLOY_HOST:-tgit-deploy@72.56.247.166}
OPTS=${DEPLOY_SSH_OPTS:-}
DIR=/srv/tgit/$ENV
SHA=$(git rev-parse --short "$REF")
TGZ=$(mktemp --suffix=.tgz)
trap 'rm -f "$TGZ"' EXIT
git archive --format=tar.gz -o "$TGZ" "$REF"

retry() { local n=0; until "$@"; do n=$((n + 1)); [ $n -ge 5 ] && return 1; echo "retry $n: $1" >&2; sleep $((n * 5)); done; }

# shellcheck disable=SC2086
if ! retry ssh $OPTS "$HOST" "test -f $DIR/.env"; then
  echo "::notice::$HOST:$DIR/.env not found — environment '$ENV' is not configured, skipping deploy"
  exit 0
fi

echo "deploy $REF ($SHA) -> $HOST:$DIR"
# shellcheck disable=SC2086
retry scp -q $OPTS "$TGZ" "$HOST:$DIR/release-$SHA.tgz"
# shellcheck disable=SC2086
retry scp -q $OPTS infra/deploy/remote.sh "$HOST:$DIR/remote.sh"
# shellcheck disable=SC2086
retry ssh $OPTS "$HOST" "bash $DIR/remote.sh $ENV $SHA"