#!/usr/bin/env bash
# WAI Studio's files, as `wai dev` serves them at /_wai/, built into one directory:
#
#   bash wai/quickstart/build-studio.sh <out-dir>
#
# <out-dir> holds Studio's build (wai/wai-studio: node build.mjs): its interface, its worker and
# styles, index.html (the page `wai dev` serves), its core in WebAssembly under pkg/
# (wai-studio/core through wasm-bindgen's web target), and Quantum Studio under quantum/ with
# its engine (wai-web with the feature quantum_engine) under quantum/pkg/, and BUILD.json, each
# file's SHA-256. The same files on every platform: an archive for any of them carries this
# directory as share/wai/studio/, where `wai dev` looks for it beside its own binary.
#
# Needs the wasm32-unknown-unknown target, the wasm-bindgen CLI at 0.2.127 (the version the
# crates pin), Node and npm. Run from anywhere; CARGO_TARGET_DIR is honoured, with a directory
# of its own under it for each workspace. Without it the builds go under the repository's
# target/studio/, which git ignores, as build-web.sh's go under an ignored target/: a build
# leaves the checkout as it found it.
set -euo pipefail
[ $# -eq 1 ] || { echo "usage: bash wai/quickstart/build-studio.sh <out-dir>" >&2; exit 2; }
ROOT=$(cd "$(dirname "$0")/../.." && pwd)
OUT=$(mkdir -p "$1" && cd "$1" && pwd)
# Written over only when it is empty or holds an earlier build of this script.
if [ -n "$(ls -A "$OUT")" ] && [ ! -f "$OUT/BUILD.json" ]; then
  echo "build-studio.sh: $OUT holds files of its own; name an empty directory" >&2
  exit 2
fi
STUDIO="$ROOT/wai/wai-studio"
TARGET=${CARGO_TARGET_DIR:-$ROOT/target/studio}
command -v wasm-bindgen >/dev/null || { echo "wasm-bindgen CLI 0.2.127 is needed (cargo install --locked wasm-bindgen-cli --version 0.2.127)" >&2; exit 2; }
wasm-bindgen --version | grep -q ' 0\.2\.127$' || { echo "the wasm-bindgen CLI must be 0.2.127, the version the crates pin" >&2; exit 2; }
command -v npm >/dev/null || { echo "Node and npm are needed to build Studio's interface" >&2; exit 2; }
WORK=$(mktemp -d)
trap 'rm -rf "$WORK"' EXIT

# The floor's zstd is C, compiled for wasm32: the archive needs an archiver that indexes
# WebAssembly objects (llvm-ar), as wai-studio/e2e/run.sh finds it.
if [ -z "${AR_wasm32_unknown_unknown:-}" ]; then
  for a in llvm-ar /opt/homebrew/opt/llvm/bin/llvm-ar /usr/local/opt/llvm/bin/llvm-ar; do
    if command -v "$a" >/dev/null 2>&1; then export AR_wasm32_unknown_unknown="$(command -v "$a")"; break; fi
  done
fi
if [ -z "${CC_wasm32_unknown_unknown:-}" ] && [ -n "${AR_wasm32_unknown_unknown:-}" ] && [ -x "$(dirname "$AR_wasm32_unknown_unknown")/clang" ]; then
  export CC_wasm32_unknown_unknown="$(dirname "$AR_wasm32_unknown_unknown")/clang"
fi

# Studio's core.
(cd "$STUDIO/core" && CARGO_TARGET_DIR="$TARGET/core" cargo build --locked --release --target wasm32-unknown-unknown)
wasm-bindgen --target web --out-dir "$WORK/core-pkg" --out-name wai_studio_core "$TARGET/core/wasm32-unknown-unknown/release/wai_studio_core.wasm"
# The quantum engine, for Quantum Studio.
(cd "$ROOT/wai/wai-web" && CARGO_TARGET_DIR="$TARGET/wai-web" cargo build --locked --release --target wasm32-unknown-unknown --features quantum_engine)
wasm-bindgen --target web --out-dir "$WORK/quantum-pkg" --out-name wai_quantum_ide "$TARGET/wai-web/wasm32-unknown-unknown/release/wai_web.wasm"
# The pages need the modules and the binaries alone, not the type declarations.
rm -f "$WORK"/core-pkg/*.d.ts "$WORK"/quantum-pkg/*.d.ts

# Quantum Studio, then Studio, their packages from their lock files with no install script run.
(cd "$ROOT/wai/quantum-studio" && npm ci --ignore-scripts --no-audit --no-fund && node build.mjs --pkg "$WORK/quantum-pkg")
(cd "$STUDIO" && npm ci --ignore-scripts --no-audit --no-fund && node build.mjs --core-pkg "$WORK/core-pkg" --quantum "$ROOT/wai/quantum-studio/dist")

find "$OUT" -mindepth 1 -delete
cp -R "$STUDIO/dist/." "$OUT/"
for f in index.html wai-studio.js pkg/wai_studio_core_bg.wasm quantum/pkg/wai_quantum_ide_bg.wasm BUILD.json; do
  [ -f "$OUT/$f" ] || { echo "build-studio.sh: the build has no $f" >&2; exit 1; }
done
ls -l "$OUT" "$OUT/pkg"
echo "WAI Studio is in $OUT"