#!/bin/sh
set -e

# Commander reads optional flags from env (e.g. PROXY="") — empty values crash grab.
for var in PROXY DAYS TIMEOUT LANG OUTPUT GZIP JSON CURL; do
    eval "val=\$$var"
    if [ -z "$val" ]; then
        unset "$var" 2>/dev/null || true
    fi
done

grab_epg() {
    cmd="npm run grab --"

    if [ -n "$SITES" ]; then
        if [ -n "$OUTPUT" ]; then
            output="$OUTPUT"
        else
            output='guides/{site}.xml'
        fi
        cmd="$cmd --sites=$SITES --output=$output"
    else
        cmd="$cmd --channels=public/channels.xml --output=${OUTPUT:-public/guide.xml}"
    fi

    if [ -n "$MAX_CONNECTIONS" ]; then
        cmd="$cmd --maxConnections=$MAX_CONNECTIONS"
    fi
    if [ -n "$DAYS" ]; then
        cmd="$cmd --days=$DAYS"
    fi
    if [ -n "$TIMEOUT" ]; then
        cmd="$cmd --timeout=$TIMEOUT"
    fi
    if [ -n "$DELAY" ] && [ "$DELAY" != "0" ]; then
        cmd="$cmd --delay=$DELAY"
    fi
    if [ -n "$LANG" ]; then
        cmd="$cmd --lang=$LANG"
    fi
    if [ -n "$PROXY" ]; then
        cmd="$cmd --proxy=$PROXY"
    fi
    if [ "$GZIP" = "true" ]; then
        cmd="$cmd --gzip"
    fi
    if [ "$JSON" = "true" ]; then
        cmd="$cmd --json"
    fi
    if [ "$CURL" = "true" ]; then
        cmd="$cmd --curl"
    fi

    echo "Running: $cmd"
    eval $cmd
}

if [ "$1" = "grab" ]; then
    if ! mkdir /tmp/epg-grab.lock 2>/dev/null; then
        echo "EPG grab already running, skipping"
        exit 0
    fi
    trap 'rmdir /tmp/epg-grab.lock 2>/dev/null || true' EXIT INT TERM
    grab_epg
    exit 0
fi

mkdir -p /app/guides

if [ -n "$SITES" ]; then
    echo "Starting initial EPG data grab for sites: $SITES"
    grab_epg
fi

if [ -n "$SITES" ] && [ "${GRAB_INTERVAL_HOURS:-0}" -gt 0 ] 2>/dev/null; then
    echo "Scheduling EPG grab every ${GRAB_INTERVAL_HOURS} hours"
    (
        while true; do
            sleep $((GRAB_INTERVAL_HOURS * 3600))
            echo "Starting scheduled EPG grab at $(date -u '+%Y-%m-%d %H:%M:%S UTC' 2>/dev/null || date)"
            /app/entrypoint.sh grab
        done
    ) &
elif [ -n "$CRON_SCHEDULE" ]; then
    echo "WARNING: CRON_SCHEDULE is deprecated, use GRAB_INTERVAL_HOURS instead (ignored)"
fi

echo "Starting server on port 3000 to serve EPG files from /app/guides"
npx serve -p 3000 /app/guides &

tail -f /dev/null