#!/bin/bash
# Local app. By default your data lives OUTSIDE the repo (see README > Data &
# privacy); set FINANCE_PROJECT_DIR to override. An existing ./.finance keeps
# working in place. See README.
set -euo pipefail
APP_DIR="$(cd "$(dirname "$0")" && pwd)"
PORT="${PORT:-8321}"

# Interpreter: prefer .venv (has EVERY dependency, incl. pytrends for the barometer)
# over the system python3 — a system interpreter without pytrends silently loses
# the monthly barometer point (collector returns ok:False).
if [ -x "$APP_DIR/.venv/bin/python" ]; then
  PY="$APP_DIR/.venv/bin/python"
else
  PY="python3"
fi
"$PY" -c "import flask, pytrends" 2>/dev/null || "$PY" -m pip install -q -r "$APP_DIR/requirements.txt"

# A previous instance (nohup, another terminal) keeps the port and Flask dies with
# "Address already in use"; ./run.sh means "run the current code", so stop it first.
# Stop the port owner (not a process pattern: pkill -f from a child of the server missed it
# and the new instance died with "Address already in use"). TERM first, KILL after 8 s.
OLD="$(lsof -ti tcp:"$PORT" -sTCP:LISTEN 2>/dev/null | tr '\n' ' ' || true)"
if [ -n "$OLD" ]; then
  for p in $OLD; do  # only our own instance: another app on this port (e.g. a second kist checkout) is not ours to kill
    ps -o command= -p "$p" | grep -qF "$APP_DIR/server/app.py" || { echo "[budget-app] port $PORT is taken by another process ($p): run with PORT=<other> ./run.sh"; exit 1; }
  done
  kill $OLD 2>/dev/null
  for _ in $(seq 1 32); do lsof -nP -iTCP:"$PORT" -sTCP:LISTEN >/dev/null 2>&1 || break; sleep 0.25; done
  if lsof -nP -iTCP:"$PORT" -sTCP:LISTEN >/dev/null 2>&1; then kill -9 $OLD 2>/dev/null; sleep 0.5; fi
  echo "[budget-app] previous instance ($OLD) stopped"
fi

[ -n "${KIST_NO_OPEN:-}" ] || ( sleep 1.5 && open "http://127.0.0.1:$PORT" ) &  # no new tab on in-app restart
exec "$PY" "$APP_DIR/server/app.py"