#!/usr/bin/env bash
# setup.sh — bootstrap the Mestre development environment.
#
# Idempotent. Safe to run multiple times.
#
# Performs:
#   1. Initializes the Buildroot submodule.
#   2. Checks that the host has the tools Buildroot needs.
#
# On success, you can build with:
#   ./scripts/build.sh

set -euo pipefail

REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
cd "$REPO_ROOT"

# ---------------------------------------------------------------------------
# 1. Buildroot submodule
# ---------------------------------------------------------------------------
if [ ! -f "$REPO_ROOT/buildroot/Makefile" ]; then
    echo ">>> Initializing Buildroot submodule (this may take a minute)..."
    git submodule update --init buildroot
else
    echo ">>> Buildroot submodule already initialized."
fi

# ---------------------------------------------------------------------------
# 2. Host prerequisites
# ---------------------------------------------------------------------------
# Buildroot's full list lives at:
#   https://buildroot.org/downloads/manual/manual.html#requirement
# We check the most commonly missing ones; Buildroot itself will surface
# anything else we've forgotten.
echo ">>> Checking host prerequisites..."
missing=()
for tool in make gcc g++ patch perl python3 cpio rsync bc unzip wget file which sed; do
    if ! command -v "$tool" >/dev/null 2>&1; then
        missing+=("$tool")
    fi
done

if [ ${#missing[@]} -gt 0 ]; then
    echo
    echo "!!! Missing host tools: ${missing[*]}"
    echo
    echo "On Debian/Ubuntu, install with:"
    echo "    sudo apt-get install build-essential patch perl python3 \\"
    echo "                         cpio rsync bc unzip wget file"
    echo
    echo "See https://buildroot.org/downloads/manual/manual.html#requirement"
    echo "for the complete list."
    exit 1
fi

echo ">>> All required host tools present."
echo
echo "Setup complete. Next:"
echo "    ./scripts/build.sh"