#!/usr/bin/env bash
# Build the synth-visualiser WASM package and place it in www/pkg/.
#
# Usage:
#   ./build-web.sh          # release build (optimised)
#   ./build-web.sh --dev    # dev build (faster, no wasm-opt)

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "$SCRIPT_DIR"

# ── Argument parsing ──────────────────────────────────────────────────────────
MODE="release"
WASM_PACK_PROFILE="--release"
for arg in "$@"; do
    case "$arg" in
        --dev)  MODE="dev"; WASM_PACK_PROFILE="--dev" ;;
        --help) echo "Usage: $0 [--dev]"; exit 0 ;;
        *)      echo "Unknown argument: $arg"; exit 1 ;;
    esac
done

# ── Preflight checks ──────────────────────────────────────────────────────────
if ! command -v wasm-pack &>/dev/null; then
    echo "error: wasm-pack not found. Install it with:"
    echo "  cargo install wasm-pack"
    exit 1
fi

if ! rustup target list --installed | grep -q "wasm32-unknown-unknown"; then
    echo "Adding wasm32-unknown-unknown target..."
    rustup target add wasm32-unknown-unknown
fi

# ── Build ─────────────────────────────────────────────────────────────────────
echo "Building synth-visualiser ($MODE)..."
wasm-pack build crates/synth-visualiser \
    $WASM_PACK_PROFILE \
    --target web \
    --out-dir ../../www/pkg

echo ""
echo "Done. Serve with:"
echo "  npx serve www"
echo "  or"
echo "  python3 -m http.server --directory www 8080"