#!/usr/bin/env bash
# Start the API (port 3000) and Flutter web dev server (port 8080) with merged logs.
# Usage: ./startup.sh
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
API_PORT=3000
WEB_PORT=8080

if [ -f "$ROOT/scripts/flutter-env.sh" ]; then
  # shellcheck source=/dev/null
  source "$ROOT/scripts/flutter-env.sh"
fi

log() { printf '%s\n' "$*"; }

kill_port() {
  local port=$1
  if command -v fuser >/dev/null 2>&1; then
    if fuser "${port}/tcp" >/dev/null 2>&1; then
      log "Stopping process(es) on port ${port}..."
      fuser -k "${port}/tcp" >/dev/null 2>&1 || true
      sleep 0.5
    fi
    return
  fi

  if ! command -v lsof >/dev/null 2>&1; then
    warn "Cannot free port ${port}: install fuser or lsof"
    return
  fi

  local pids
  pids="$(lsof -t -iTCP:"${port}" -sTCP:LISTEN 2>/dev/null || true)"
  if [ -n "$pids" ]; then
    log "Stopping process(es) on port ${port}: ${pids}"
    # shellcheck disable=SC2086
    kill ${pids} 2>/dev/null || true
    sleep 0.5
    # shellcheck disable=SC2086
    kill -9 ${pids} 2>/dev/null || true
  fi
}

warn() { printf 'WARN: %s\n' "$*" >&2; }

prefix_lines() {
  local tag=$1
  while IFS= read -r line || [ -n "${line:-}" ]; do
    printf '[%s] %s\n' "$tag" "$line"
  done
}

cleanup() {
  trap - INT TERM EXIT
  log "Shutting down..."
  if [ -n "${API_PID:-}" ]; then kill "$API_PID" 2>/dev/null || true; fi
  if [ -n "${WEB_PID:-}" ]; then kill "$WEB_PID" 2>/dev/null || true; fi
  kill_port "$API_PORT"
  kill_port "$WEB_PORT"
  wait 2>/dev/null || true
}

trap cleanup INT TERM EXIT

log "Freeing ports ${API_PORT} (API) and ${WEB_PORT} (web)..."
kill_port "$API_PORT"
kill_port "$WEB_PORT"

if [ ! -f "$ROOT/server/.env" ]; then
  warn "Missing server/.env — copy server/.env.example and configure it first."
fi

log "Starting API on http://localhost:${API_PORT} ..."
(
  cd "$ROOT/server"
  dart run bin/server.dart 2>&1 | prefix_lines api
) &
API_PID=$!

# Build a static debug web bundle and serve it via a plain HTTP server.
# This avoids `flutter run -d web-server`'s DWDS session pinning, which causes
# blank pages when the browser is closed and reopened.
#
# Set SKIP_WEB_BUILD=1 to skip the build (useful when iterating on server-only
# changes and the existing build/web is fine to keep serving).
if [ "${SKIP_WEB_BUILD:-0}" != "1" ]; then
  log "Building Flutter web (debug)..."
  (
    cd "$ROOT"
    flutter build web --debug --source-maps \
      --dart-define=API_BASE_URL="http://localhost:${API_PORT}" \
      2>&1 | prefix_lines web-build
  )
else
  log "SKIP_WEB_BUILD=1 — reusing existing build/web bundle."
fi

log "Starting web app on http://localhost:${WEB_PORT} ..."
(
  cd "$ROOT"
  dart run scripts/web_static_server.dart build/web "${WEB_PORT}" \
    2>&1 | prefix_lines web
) &
WEB_PID=$!

log "Both services running. Press Ctrl+C to stop."
log "  API: http://localhost:${API_PORT}"
log "  Web: http://localhost:${WEB_PORT}"
log ""

wait -n 2>/dev/null || wait || true
exit_code=$?
cleanup
exit "$exit_code"