#!/usr/bin/env bash
set -euo pipefail

NODE_VERSION="22.23.1"
WASM_PACK_VERSION="0.15.0"
RSW_VERSION="0.8.0"

export PATH="$HOME/.local/bin:$HOME/.cargo/bin:$PATH"
mkdir -p "$HOME/.local/bin" "$HOME/.cargo/bin"

missing_packages=()
for package in libvulkan1 mesa-vulkan-drivers xauth xvfb; do
    if ! dpkg-query -W -f='${Status}' "$package" 2>/dev/null | grep -Fq "install ok installed"; then
        missing_packages+=("$package")
    fi
done
if ((${#missing_packages[@]})); then
    echo "Installing WebGPU runtime dependencies..."
    sudo apt-get update
    sudo apt-get install -y "${missing_packages[@]}"
fi

install_node() {
    local machine node_arch archive install_dir tmp_dir
    machine="$(uname -m)"
    case "$machine" in
        x86_64) node_arch="x64" ;;
        aarch64) node_arch="arm64" ;;
        *)
            echo "Unsupported architecture for Node.js: $machine" >&2
            return 1
            ;;
    esac

    archive="node-v${NODE_VERSION}-linux-${node_arch}.tar.xz"
    install_dir="$HOME/.local/node-v${NODE_VERSION}-linux-${node_arch}"
    if [[ ! -x "$install_dir/bin/node" ]]; then
        echo "Installing Node.js v${NODE_VERSION}..."
        tmp_dir="$(mktemp -d)"
        trap 'rm -rf "$tmp_dir"' RETURN
        curl --fail --location --silent --show-error \
            "https://nodejs.org/dist/v${NODE_VERSION}/${archive}" \
            --output "$tmp_dir/$archive"
        curl --fail --location --silent --show-error \
            "https://nodejs.org/dist/v${NODE_VERSION}/SHASUMS256.txt" \
            --output "$tmp_dir/SHASUMS256.txt"
        (
            cd "$tmp_dir"
            grep "  ${archive}$" SHASUMS256.txt | sha256sum --check --strict
        )
        tar -xJf "$tmp_dir/$archive" -C "$HOME/.local"
        rm -rf "$tmp_dir"
        trap - RETURN
    fi

    for command in node npm npx corepack; do
        ln -sfn "$install_dir/bin/$command" "$HOME/.local/bin/$command"
    done
}

install_wasm_pack() {
    local machine target archive tmp_dir
    machine="$(uname -m)"
    case "$machine" in
        x86_64) target="x86_64-unknown-linux-musl" ;;
        aarch64) target="aarch64-unknown-linux-musl" ;;
        *)
            echo "Unsupported architecture for wasm-pack: $machine" >&2
            return 1
            ;;
    esac

    if ! wasm-pack --version 2>/dev/null | grep -Fq "${WASM_PACK_VERSION}"; then
        echo "Installing wasm-pack ${WASM_PACK_VERSION}..."
        archive="wasm-pack-v${WASM_PACK_VERSION}-${target}.tar.gz"
        tmp_dir="$(mktemp -d)"
        trap 'rm -rf "$tmp_dir"' RETURN
        curl --fail --location --silent --show-error \
            "https://github.com/wasm-bindgen/wasm-pack/releases/download/v${WASM_PACK_VERSION}/${archive}" \
            --output "$tmp_dir/$archive"
        tar -xzf "$tmp_dir/$archive" -C "$tmp_dir"
        install -m 0755 \
            "$tmp_dir/wasm-pack-v${WASM_PACK_VERSION}-${target}/wasm-pack" \
            "$HOME/.cargo/bin/wasm-pack"
        rm -rf "$tmp_dir"
        trap - RETURN
    fi
}

install_node

if ! command -v rustup >/dev/null 2>&1; then
    echo "Installing rustup..."
    curl --proto '=https' --tlsv1.2 --fail --silent --show-error \
        https://sh.rustup.rs | sh -s -- -y --profile minimal --no-modify-path \
        --default-toolchain none
fi
source "$HOME/.cargo/env"

toolchain="$(sed -n 's/^channel = "\([^"]*\)"/\1/p' rust-toolchain.toml)"
echo "Installing Rust toolchain ${toolchain}..."
rustup toolchain install "$toolchain" --profile minimal \
    --component rust-src \
    --component rustfmt \
    --target wasm32-unknown-unknown

install_wasm_pack

if ! rsw --version 2>/dev/null | grep -Fq "${RSW_VERSION}"; then
    echo "Installing rsw ${RSW_VERSION}..."
    cargo install rsw --version "$RSW_VERSION" --locked
fi

# Amp shells include ~/.local/bin, while setup's PATH changes do not persist.
for command in cargo rustc rustdoc rustfmt rustup wasm-pack rsw; do
    ln -sfn "$HOME/.cargo/bin/$command" "$HOME/.local/bin/$command"
done

echo "Installing JavaScript dependencies..."
npm ci

echo "Building the application..."
npm run build

echo "Starting orb development services..."
amp orb services ensure

echo "Orb setup complete."