#!/usr/bin/env bash
# rebuild-frontend — post-pipeline hook for Kin.
#
# Triggered automatically after pipeline_completed when web/frontend/* modules
# were touched. Builds the Vue 3 frontend and restarts the API server.
#
# Registration (one-time):
#   kin hook setup --project <project_id>

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
FRONTEND_DIR="$PROJECT_ROOT/web/frontend"

echo "[rebuild-frontend] Building frontend in $FRONTEND_DIR ..."
cd "$FRONTEND_DIR"
npm run build
echo "[rebuild-frontend] Build complete."

# Restart API server if it's currently running.
# pgrep returns 1 if no match; || true prevents set -e from exiting.
API_PID=$(pgrep -f "uvicorn web.api" 2>/dev/null || true)
if [ -n "$API_PID" ]; then
    echo "[rebuild-frontend] Stopping API server (PID: $API_PID) ..."
    kill "$API_PID" 2>/dev/null || true
    # Wait for port 8420 to free up (up to 5 s)
    for i in $(seq 1 5); do
        pgrep -f "uvicorn web.api" > /dev/null 2>&1 || break
        sleep 1
    done
    echo "[rebuild-frontend] Starting API server ..."
    cd "$PROJECT_ROOT"
    nohup python -m uvicorn web.api:app --port 8420 >> /tmp/kin-api.log 2>&1 &
    echo "[rebuild-frontend] API server started (PID: $!)."
else
    echo "[rebuild-frontend] API server not running; skipping restart."
fi