#!/usr/bin/env bash
# Deploy the metronome to the Caddy web root that serves
# https://metronome.varasys.io
#
# Caddy config: /var/lib/caddy/Caddyfile  (metronome.varasys.io:8443 block)
# Bind-mount:   /etc/containers/systemd/caddy.container
#
# The web root is bind-mounted read-only into the Caddy container and served by
# file_server, which picks up changes immediately — so a plain file copy is all
# that's needed (no container restart). The web root is mirrored from dist/ with
# `rsync --delete`, so anything no longer built is removed from the live site.
set -euo pipefail

SRC_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DEST_DIR="/var/lib/caddy/www/metronome"
DIST_DIR="$SRC_DIR/dist"

[[ -f "$SRC_DIR/index.html" ]] || { echo "error: $SRC_DIR/index.html not found" >&2; exit 1; }
[[ -d "$DEST_DIR" ]] || { echo "error: web root $DEST_DIR is missing — is Caddy set up?" >&2; exit 1; }

# Assemble the self-contained pages (inlines assets/ into dist/). dist/ is git-ignored.
"$SRC_DIR/build.sh"
[[ -f "$DIST_DIR/index.html" ]] || { echo "error: build did not produce $DIST_DIR/index.html" >&2; exit 1; }

# --- compute build version ---------------------------------------------------
# Formal build: clean tree on a commit tagged v<VERSION>  -> "X.Y.Z"
# Dev build:    anything else                             -> "X.Y.Z-dev.<utc-ts>.<sha>[.dirty]"
VER="$(cat "$SRC_DIR/VERSION" 2>/dev/null || echo 0.0.0)"
cd "$SRC_DIR"
if git rev-parse --git-dir >/dev/null 2>&1; then
  tag="$(git describe --exact-match --tags HEAD 2>/dev/null || true)"
  dirty=""; [[ -n "$(git status --porcelain 2>/dev/null)" ]] && dirty=".dirty"
  if [[ "$tag" == "v$VER" && -z "$dirty" ]]; then
    BUILD="$VER"                                            # formal release
  else
    BUILD="$VER-dev.$(date -u +%Y%m%dT%H%M%SZ).g$(git rev-parse --short HEAD 2>/dev/null || echo nogit)$dirty"
  fi
else
  BUILD="$VER-dev.$(date -u +%Y%m%dT%H%M%SZ)"               # not a git checkout
fi

# stamp the version into the built copies only (source keeps the APP_VERSION placeholder)
for f in index.html mobile.html mobile-sessions.html pm_e-2.html; do
  [[ -f "$DIST_DIR/$f" ]] || continue
  tmp="$(mktemp)"
  sed "s|const APP_VERSION = \"[^\"]*\";|const APP_VERSION = \"$BUILD\";|" "$DIST_DIR/$f" > "$tmp"
  mv "$tmp" "$DIST_DIR/$f"
done

# Mirror dist/ -> web root, deleting anything that's no longer built (old pages, firmware, …)
rsync -a --delete "$DIST_DIR/" "$DEST_DIR/"
echo "deployed v$BUILD -> $DEST_DIR"
for f in index.html mobile.html mobile-sessions.html pm_e-2.html; do
  echo "  $f ($(stat -c '%s' "$DEST_DIR/$f") bytes)"
done

# Smoke test: Caddy serves on :8443 with tls internal; resolve the host
# to localhost so SNI matches the site block.
if command -v curl >/dev/null 2>&1; then
  code=$(curl -sk --resolve metronome.varasys.io:8443:127.0.0.1 \
    https://metronome.varasys.io:8443/ -o /dev/null -w '%{http_code}' || echo "??")
  echo "smoke test: metronome.varasys.io -> HTTP $code"
fi