#!/usr/bin/env bash
# bin/build — compile the backend + CLI binaries and the frontend static bundle.
#
# Output:
#   dist/dispatch-server   — standalone backend binary (Bun compile)
#   dist/dispatch          — standalone CLI binary (Bun compile)
#   dist/web/              — built frontend static files (vite build)
#
# The frontend is built with VITE_HTTP_PORT=24991 + VITE_WS_PORT=24990 so the
# bundle talks to the backend on :24991 (HTTP) and :24990 (WS) at runtime.
# The backend serves the frontend from DISPATCH_WEB_DIR (set in the systemd env).
#
# Usage: bin/build [--no-frontend]   (skip the frontend build if already built)

set -euo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ROOT="$(cd "$HERE/.." && pwd)"
BACKEND="$ROOT"
FRONTEND="$(cd "$ROOT/.." && pwd)/dispatch-web"

BUILD_FRONTEND=1
if [[ "${1:-}" == "--no-frontend" ]]; then
	BUILD_FRONTEND=0
fi

# Recompile all TypeScript packages (composite project references) so the
# dist/*.js files are up to date with the .ts source. The packages' package.json
# `main` fields point to dist/index.js, so bun build --compile reads the compiled
# JavaScript — without this step, source edits are silently lost in the binary.
echo "[build] tsc --build (recompile packages from source)"
cd "$BACKEND"
bunx tsc --build 2>&1 | tail -5

echo "[build] backend binary → dist/dispatch-server"
mkdir -p "$ROOT/dist"
bun build --compile "$BACKEND/packages/host-bin/src/main.ts" \
	--outfile "$ROOT/dist/dispatch-server" \
	--minify 2>&1 | tail -3

echo "[build] CLI binary → dist/dispatch"
bun build --compile "$BACKEND/packages/cli/src/main.ts" \
	--outfile "$ROOT/dist/dispatch" \
	--minify 2>&1 | tail -3

if [[ "$BUILD_FRONTEND" -eq 1 ]]; then
	if [[ ! -d "$FRONTEND" ]]; then
		echo "[build] frontend not found at $FRONTEND — skipping" >&2
	else
		echo "[build] frontend → dist/web/ (VITE_HTTP_PORT=24991 VITE_WS_PORT=24990)"
		(
			cd "$FRONTEND"
			VITE_HTTP_PORT=24991 VITE_WS_PORT=24990 bun run build 2>&1 | tail -5
		)
		rm -rf "$ROOT/dist/web"
		cp -r "$FRONTEND/dist" "$ROOT/dist/web"
		echo "[build] copied $(find "$ROOT/dist/web" -type f | wc -l) files"
	fi
fi

echo "[build] done."
echo "  dist/dispatch-server   ($(du -h "$ROOT/dist/dispatch-server" | cut -f1))"
echo "  dist/dispatch          ($(du -h "$ROOT/dist/dispatch" | cut -f1))"
[[ -d "$ROOT/dist/web" ]] && echo "  dist/web/              ($(du -sh "$ROOT/dist/web" | cut -f1))"