#!/usr/bin/env bash

#

# bundle-wasm-docs.sh -- Build the WebAssembly compiler and copy

# artifacts into the Astro docs site's public directory.

#

# Usage:

# ./scripts/bundle-wasm-docs.sh

#

set -euo pipefail

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

DEST_DIR="${REPO_ROOT}/docs/public/wasm"

echo "==> Building gh-aw.wasm..."

cd "${REPO_ROOT}"

make build-wasm

echo "==> Copying artifacts to ${DEST_DIR}..."

mkdir -p "${DEST_DIR}"

cp "${REPO_ROOT}/gh-aw.wasm" "${DEST_DIR}/gh-aw.wasm"

# wasm_exec.js ships with the Go toolchain; try both known locations then fall back to repo-root copy.

WASM_EXEC_SRC="$(go env GOROOT)/misc/wasm/wasm_exec.js"

if [ ! -f "${WASM_EXEC_SRC}" ]; then

# Go 1.24+ moved wasm_exec.js to lib/wasm/

WASM_EXEC_SRC="$(go env GOROOT)/lib/wasm/wasm_exec.js"

fi

if [ ! -f "${WASM_EXEC_SRC}" ]; then

# Search the Go module cache as a fallback

WASM_EXEC_SRC="$(find "$(go env GOPATH)/pkg/mod" -name wasm_exec.js -path "*/go1.*/lib/wasm/*" 2>/dev/null | sort -V | tail -1)"

fi

if [ ! -f "${WASM_EXEC_SRC}" ]; then

WASM_EXEC_SRC="${REPO_ROOT}/wasm_exec.js"

fi

cp "${WASM_EXEC_SRC}" "${DEST_DIR}/wasm_exec.js"

# Generate brotli-compressed version for smaller transfers

# GitHub Pages serves .br files automatically when Accept-Encoding: br is present

if command -v brotli &> /dev/null; then

echo "==> Compressing WASM with brotli..."

brotli -k -q 11 "${DEST_DIR}/gh-aw.wasm"

echo "Compressed: $(du -h "${DEST_DIR}/gh-aw.wasm.br" | cut -f1) (from $(du -h "${DEST_DIR}/gh-aw.wasm" | cut -f1))"

else

echo "Warning: brotli not found. Install with: apt-get install brotli (or brew install brotli)"

echo "Falling back to gzip compression..."

gzip -k -9 "${DEST_DIR}/gh-aw.wasm"

echo "Compressed: $(du -h "${DEST_DIR}/gh-aw.wasm.gz" | cut -f1) (from $(du -h "${DEST_DIR}/gh-aw.wasm" | cut -f1))"

fi

echo ""

echo "Done. Files in ${DEST_DIR}:"

ls -lh "${DEST_DIR}/gh-aw.wasm" "${DEST_DIR}/wasm_exec.js"