#!/usr/bin/env bash
# entrypoint.sh — news-digest worker startup.
#
# Strategy:
#   1. If /output is empty, run digest.py once at start so the page
#      isn't blank while waiting for the next cron tick.
#   2. Start busybox crond in foreground so the container stays up.
#
# All env vars are inherited from compose, including TZ which busybox
# crond honors when computing fire times.

set -e

mkdir -p /output

# Sync static frontend assets from /app/templates → /output. The web
# container serves /output as static; the assets are baked into the
# image but the bind-mounted /output otherwise wouldn't pick up
# CSS/JS updates on rebuild without a manual copy.
for asset in style.css app.js favicon.svg; do
    if [ -f "/app/templates/$asset" ]; then
        cp -f "/app/templates/$asset" "/output/$asset"
    fi
done

if [ ! -f /output/index.html ]; then
    echo "[entrypoint] no /output/index.html yet — running first digest"
    /usr/local/bin/run-digest.sh || \
        echo "[entrypoint] first run failed; cron will retry on schedule"
fi

# Tee crontab into the place busybox expects (already done in image
# via COPY) and run crond in foreground. -L /dev/stdout sends cron
# stdout/stderr to docker logs.
echo "[entrypoint] starting crond (fires per /etc/crontabs/root)"
exec crond -f -L /dev/stdout -l 8