#!/usr/bin/env bash
# =============================================================================
# ~/bin/fleet-beacon — Fleet Realtime Telemetry Beacon Dispatcher
# Zero-Bloat Architecture: Native C first, Bash fallback, Python avoided.
# =============================================================================

BIN_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# Ensure fleet environment is active
if [ -z "$FLEET_NODE" ] || [ -z "$FLEET_ARCH" ]; then
    [ -f "$BIN_DIR/bin-env" ] && source "$BIN_DIR/bin-env" 2>/dev/null || true
fi

# 1. Compile or recompile native C binary if source is newer or binary missing
CC_BIN=""
if command -v gcc >/dev/null 2>&1; then
    CC_BIN="gcc"
elif command -v clang >/dev/null 2>&1; then
    CC_BIN="clang"
fi

if [ -n "$CC_BIN" ] && [ -f "$BIN_DIR/src/fleet-beacon.c" ]; then
    if [ ! -x "$BIN_DIR/fleet-beacon-c" ] || [ "$BIN_DIR/src/fleet-beacon.c" -nt "$BIN_DIR/fleet-beacon-c" ]; then
        "$CC_BIN" -O2 -Wall -Wextra -pedantic -o "$BIN_DIR/fleet-beacon-c" "$BIN_DIR/src/fleet-beacon.c" 2>/dev/null || true
    fi
fi

# 2. Prefer native C compiled binary (< 1MB RAM, 0% CPU)
if [ -x "$BIN_DIR/fleet-beacon-c" ]; then
    exec "$BIN_DIR/fleet-beacon-c" "$@"
fi

# 3. Fallback to pure Bash implementation
if [ -x "$BIN_DIR/fleet-beacon.sh" ]; then
    exec "$BIN_DIR/fleet-beacon.sh" "$@"
fi

# 4. Last-ditch Python fallback if neither is available
if [ -x "$BIN_DIR/fleet-beacon.py" ] && command -v python3 >/dev/null 2>&1; then
    exec python3 "$BIN_DIR/fleet-beacon.py" "$@"
fi

echo "Error: No viable fleet-beacon runtime found." >&2
exit 1