#!/bin/bash
# Check build dependencies and provide installation instructions

set -e

echo "🔍 Checking build dependencies..."
echo ""

MISSING_DEPS=0

# Check Rust
if command -v rustc >/dev/null 2>&1; then
    echo "✅ Rust: $(rustc --version)"
else
    echo "❌ Rust: Not found"
    echo "   Install: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh"
    MISSING_DEPS=$((MISSING_DEPS + 1))
fi

# Check Node.js
if command -v node >/dev/null 2>&1; then
    NODE_VERSION=$(node --version)
    NODE_MAJOR=$(echo "$NODE_VERSION" | cut -d. -f1 | tr -d 'v')
    if [ "$NODE_MAJOR" -ge 18 ]; then
        echo "✅ Node.js: $NODE_VERSION"
    else
        echo "⚠️  Node.js: $NODE_VERSION (need 18+)"
        MISSING_DEPS=$((MISSING_DEPS + 1))
    fi
else
    echo "❌ Node.js: Not found"
    echo "   Install: https://nodejs.org/"
    MISSING_DEPS=$((MISSING_DEPS + 1))
fi

# Check Docker (for macOS or non-Alpine Linux)
if [[ "$OSTYPE" == "darwin"* ]] || [[ "$OSTYPE" == "linux-gnu"* ]]; then
    if command -v docker >/dev/null 2>&1; then
        if docker info >/dev/null 2>&1; then
            echo "✅ Docker: $(docker --version)"
        else
            echo "⚠️  Docker: Installed but daemon not running"
            echo "   Start Docker Desktop or: sudo systemctl start docker"
        fi
    else
        echo "❌ Docker: Not found (required for macOS, optional for Linux)"
        if [[ "$OSTYPE" == "darwin"* ]]; then
            echo "   Install: https://www.docker.com/products/docker-desktop"
            MISSING_DEPS=$((MISSING_DEPS + 1))
        else
            echo "   Install: https://docs.docker.com/get-docker/"
        fi
    fi
fi

# Check Alpine tools (for native Alpine Linux)
if [ -f /etc/alpine-release ]; then
    echo ""
    echo "🏔️  Alpine Linux detected - checking native tools..."
    
    for tool in abuild alpine-conf syslinux xorriso; do
        if command -v $tool >/dev/null 2>&1; then
            echo "✅ $tool: Installed"
        else
            echo "❌ $tool: Not found"
            echo "   Install: apk add alpine-sdk abuild alpine-conf syslinux xorriso"
            MISSING_DEPS=$((MISSING_DEPS + 1))
        fi
    done
fi

echo ""
if [ $MISSING_DEPS -eq 0 ]; then
    echo "✅ All dependencies satisfied!"
    exit 0
else
    echo "❌ Missing $MISSING_DEPS dependency/dependencies"
    echo "   Please install missing dependencies before building"
    exit 1
fi