#!/bin/bash

# Check if ./target/wasi-sdk exists
if [ ! -d "./target/wasi-sdk" ]; then
    echo "WASI SDK not found, downloading v25..."

    # Determine OS and architecture
    OS=$(uname -s | tr '[:upper:]' '[:lower:]')
    ARCH=$(uname -m)

    # Map architecture names to WASI SDK format
    case $ARCH in
        x86_64)
            ARCH="x86_64"
            ;;
        arm64|aarch64)
            ARCH="arm64"
            ;;
        *)
            echo "Unsupported architecture: $ARCH"
            exit 1
            ;;
    esac

    # Map OS names to WASI SDK format
    case $OS in
        darwin)
            OS="macos"
            ;;
        linux)
            OS="linux"
            ;;
        mingw*|msys*|cygwin*)
            OS="mingw"
            ;;
        *)
            echo "Unsupported OS: $OS"
            exit 1
            ;;
    esac

    # Construct download URL
    WASI_SDK_VERSION="25"
    WASI_SDK_URL="https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-${WASI_SDK_VERSION}/wasi-sdk-${WASI_SDK_VERSION}.0-${ARCH}-${OS}.tar.gz"

    echo "Downloading from: $WASI_SDK_URL"

    # Create target directory if it doesn't exist
    mkdir -p ./target

    # Download and extract
    curl -L "$WASI_SDK_URL" | tar -xz -C ./target

    # Rename the extracted directory to wasi-sdk
    mv "./target/wasi-sdk-${WASI_SDK_VERSION}.0-${ARCH}-${OS}" "./target/wasi-sdk"

    echo "WASI SDK v25 installed successfully"
else
    echo "WASI SDK already exists at ./target/wasi-sdk"
fi