#!/usr/bin/env bash
# scripts/remote-build-display-control.sh
# Build the display_control universal binary on a remote Mac via SSH,
# then pull the result back to resources/bin/display_control.
#
# Use this from the Linux workstation when you don't have a Mac locally.
# The target Mac must have Xcode Command Line Tools installed.
#
# USAGE:
#   ./scripts/remote-build-display-control.sh              # uses default Mac (laptop 01)
#   ./scripts/remote-build-display-control.sh 192.168.32.102
#
# The default IP is laptop 01 — the designated build Mac.
# Change DEFAULT_IP below if Xcode moves to a different laptop.
#
# SSH key must already be installed on the target:
#   ssh-copy-id "speaker ready"@192.168.32.101

set -eo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
SRC="$SCRIPT_DIR/display_control.m"
OUT_BIN="$REPO_ROOT/resources/bin/display_control"

SSH_USER="speaker ready"
DEFAULT_IP="192.168.32.101"
IP="${1:-$DEFAULT_IP}"

REMOTE_TMP="/tmp/ae_display_control_build"

echo "═══════════════════════════════════════════════"
echo "  Remote build: display_control"
echo "  Build Mac: $SSH_USER @ $IP"
echo "═══════════════════════════════════════════════"

# ── Step 1: Copy source to remote ────────────────────────────────────────────

echo ""
echo "Step 1/4 — Copying source to $IP..."
ssh "$SSH_USER@$IP" "mkdir -p $REMOTE_TMP"
ssh "$SSH_USER@$IP" "cat > $REMOTE_TMP/display_control.m" < "$SRC"

# ── Step 2: Build universal binary on remote ──────────────────────────────────

echo ""
echo "Step 2/4 — Building on $IP..."
ssh "$SSH_USER@$IP" bash << 'ENDSSH'
set -e
REMOTE_TMP="/tmp/ae_display_control_build"
SRC="$REMOTE_TMP/display_control.m"
TMP_X86="$REMOTE_TMP/display_control_x86_64"
TMP_ARM="$REMOTE_TMP/display_control_arm64"
OUT="$REMOTE_TMP/display_control"

echo "  Compiling x86_64..."
clang -arch x86_64 -framework Cocoa -framework Carbon -o "$TMP_X86" "$SRC"

echo "  Compiling arm64..."
clang -arch arm64 -framework Cocoa -framework Carbon -o "$TMP_ARM" "$SRC"

echo "  Linking universal binary..."
lipo -create -output "$OUT" "$TMP_X86" "$TMP_ARM"
rm "$TMP_X86" "$TMP_ARM"
chmod +x "$OUT"

echo "  Archs: $(lipo -archs "$OUT")"
ENDSSH

# ── Step 3: Pull binary back ──────────────────────────────────────────────────

echo ""
echo "Step 3/4 — Pulling binary to resources/bin/..."
mkdir -p "$(dirname "$OUT_BIN")"
ssh "$SSH_USER@$IP" "cat $REMOTE_TMP/display_control" > "$OUT_BIN"
chmod +x "$OUT_BIN"

# ── Step 4: Clean up remote ───────────────────────────────────────────────────

echo ""
echo "Step 4/4 — Cleaning up remote..."
ssh "$SSH_USER@$IP" "rm -rf $REMOTE_TMP"

# ── Done ──────────────────────────────────────────────────────────────────────

echo ""
echo "═══════════════════════════════════════════════"
echo "  Built: $OUT_BIN"
file "$OUT_BIN"
echo ""
echo "  If both archs shown above, you're good:"
echo "    git add resources/bin/display_control"
echo "    git commit -m \"build: update display_control binary (universal)\""
echo "═══════════════════════════════════════════════"