#!/usr/bin/env bash
set -uo pipefail

# CASAN H6 — hosted AgentOps dashboard (D3).
# Regenerates the dashboard then serves it over HTTP (dashboard-server.py)
# with a stale-aware /healthz probe. MVP hosting: local HTTP daemon with a
# pid file; production swaps in a real host (nginx/container) same routes.
#
# Usage:
#   dashboard-serve.sh start [port]   regenerate + serve (default port 8787)
#   dashboard-serve.sh stop           stop the running server
#   dashboard-serve.sh status         curl /healthz of the running server
#
# Env: CASAN_DASHBOARD_STALE_S, CASAN_DASHBOARD_METRICS, CASAN_DASHBOARD_HTML,
#      CASAN_AGENTOPS_DIR (pid-file location)
#
# Greppable outputs: DASHBOARD_HOSTED | DASHBOARD_STOPPED | DASHBOARD_NOT_RUNNING

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/casan-paths.sh"
PROJECT_ROOT="$CASAN_APP_ROOT"
AGENTOPS_DIR="${CASAN_AGENTOPS_DIR:-$CASAN_HARNESS_ROOT/agentops}"
PID_FILE="$AGENTOPS_DIR/dashboard.pid"
PORT_FILE="$AGENTOPS_DIR/dashboard.port"
GENERATOR="$CASAN_HARNESS_ROOT/tests/generate-agentops-dashboard.py"
CMD="${1:-start}"
mkdir -p "$AGENTOPS_DIR"

case "$CMD" in
  start)
    PORT="${2:-8787}"
    if [[ -f "$GENERATOR" ]]; then
      python "$GENERATOR" >/dev/null 2>&1 || true
    fi
    python "$SCRIPT_DIR/dashboard-server.py" "$PORT" &
    SERVER_PID=$!
    echo "$SERVER_PID" > "$PID_FILE"
    echo "$PORT" > "$PORT_FILE"
    for _ in 1 2 3 4 5 6 7 8 9 10; do
      if curl -sS -m 2 -o /dev/null "http://127.0.0.1:$PORT/healthz" 2>/dev/null; then
        echo "DASHBOARD_HOSTED url=http://127.0.0.1:$PORT/ healthz=http://127.0.0.1:$PORT/healthz pid=$SERVER_PID"
        exit 0
      fi
      sleep 0.3
    done
    echo "DASHBOARD_START_FAILED port=$PORT (server did not come up)" >&2
    kill "$SERVER_PID" 2>/dev/null
    rm -f "$PID_FILE" "$PORT_FILE"
    exit 1
    ;;
  stop)
    if [[ -f "$PID_FILE" ]] && kill "$(cat "$PID_FILE")" 2>/dev/null; then
      echo "DASHBOARD_STOPPED pid=$(cat "$PID_FILE")"
      rm -f "$PID_FILE" "$PORT_FILE"
      exit 0
    fi
    echo "DASHBOARD_NOT_RUNNING" >&2
    rm -f "$PID_FILE" "$PORT_FILE"
    exit 1
    ;;
  status)
    if [[ -f "$PORT_FILE" ]]; then
      curl -sS -m 3 "http://127.0.0.1:$(cat "$PORT_FILE")/healthz" && echo "" && exit 0
    fi
    echo "DASHBOARD_NOT_RUNNING" >&2
    exit 1
    ;;
  *)
    echo "Usage: dashboard-serve.sh start [port] | stop | status" >&2
    exit 64
    ;;
esac