#!/usr/bin/env bash
# ------------------------------------------------------------------
# 08_start_openwebui_background.sh
# Launches Open WebUI in the background with logging.
#
# Usage:
#   bash 08_start_openwebui_background.sh
#
# Logs are written to: ./logs/openwebui_<timestamp>.log
# PID is written to:   ./logs/openwebui.pid
# ------------------------------------------------------------------
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
LOG_DIR="${SCRIPT_DIR}/logs"
mkdir -p "$LOG_DIR"

TIMESTAMP="$(date +%Y%m%d_%H%M%S)"
LOG_FILE="${LOG_DIR}/openwebui_${TIMESTAMP}.log"
PID_FILE="${LOG_DIR}/openwebui.pid"

if [ -f "$PID_FILE" ]; then
    OLD_PID=$(cat "$PID_FILE")
    if kill -0 "$OLD_PID" 2>/dev/null; then
        echo "Open WebUI already running with PID ${OLD_PID}"
        echo "Stop it first:  bash 09_stop_openwebui.sh"
        exit 1
    fi
fi

echo "Starting Open WebUI in background..."
echo "Log file: ${LOG_FILE}"

nohup bash "${SCRIPT_DIR}/07_start_openwebui.sh" > "$LOG_FILE" 2>&1 &
SERVER_PID=$!
echo "$SERVER_PID" > "$PID_FILE"

echo "Open WebUI PID: ${SERVER_PID}"
echo ""
echo "Monitor logs:    tail -f ${LOG_FILE}"
echo "Stop:            bash 09_stop_openwebui.sh"
echo ""

sleep 5
if kill -0 "$SERVER_PID" 2>/dev/null; then
    echo "Open WebUI process is running. Starting up..."
    echo "(Ready when you see 'Uvicorn running' in the logs)"
else
    echo "ERROR: Open WebUI process exited. Check logs:"
    tail -20 "$LOG_FILE"
    exit 1
fi