#!/usr/bin/env bash
# Build the meshbay-hub package: hub-specific files on top of meshbay-common.
#
# Expects build-common.sh to have run first (shared venv exists in staging).
#
# Usage: ./build-hub.sh [staging-dir]
set -euo pipefail

REPO="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
STAGING="${1:-/tmp/meshbay-build}"
COMMON_ROOT="$STAGING/meshbay-common-root"
ROOT="$STAGING/meshbay-hub-root"

VENV="$COMMON_ROOT/opt/meshbay-common/venv"
PYVER=$(basename "$VENV"/lib/python3.*)
SITE="$VENV/lib/$PYVER/site-packages"

VERSION=$(python3 -c "
import tomllib, pathlib
p = pathlib.Path('$REPO/packages/meshbay-hub/pyproject.toml')
print(tomllib.loads(p.read_text())['project']['version'])
")
echo "==> meshbay-hub $VERSION"

[ -d "$VENV" ] || { echo "!! shared venv not found — run build-common.sh first" >&2; exit 1; }

rm -rf "$ROOT"
mkdir -p "$ROOT"

# --- Hub code in the shared venv (owned by meshbay-hub package) -----------
# MOVE (not copy) from the common staging tree so dpkg/rpm knows these files
# belong to meshbay-hub, not meshbay-common. build-common.sh installed them
# so that shebangs and dependency resolution are correct.
HUB_ROOT="$ROOT/opt/meshbay-common/venv/lib/$PYVER/site-packages"
mkdir -p "$HUB_ROOT"
mv "$SITE/meshbay_hub" "$HUB_ROOT/"
mv "$SITE"/meshbay_hub-*.dist-info "$HUB_ROOT/"

# Entry point
mkdir -p "$ROOT/opt/meshbay-common/venv/bin"
mv "$VENV/bin/meshbay-hub" "$ROOT/opt/meshbay-common/venv/bin/"

# Symlink in PATH
mkdir -p "$ROOT/usr/bin"
ln -sf /opt/meshbay-common/venv/bin/meshbay-hub "$ROOT/usr/bin/meshbay-hub"

# --- Hub-specific assets --------------------------------------------------
mkdir -p "$ROOT/opt/meshbay-hub"

# Alembic config (migrations are inside the installed package at meshbay_hub/db/migrations/)
if [ -f "$REPO/packages/meshbay-hub/alembic.ini" ]; then
    mkdir -p "$ROOT/opt/meshbay-hub/migrations"
    cp "$REPO/packages/meshbay-hub/alembic.ini" "$ROOT/opt/meshbay-hub/migrations/"
fi

# Config example
mkdir -p "$ROOT/opt/meshbay-hub/share"
if [ -f "$REPO/packaging/conf/hub.toml.example" ]; then
    cp "$REPO/packaging/conf/hub.toml.example" "$ROOT/opt/meshbay-hub/share/"
fi

# Also install to /etc/meshbay/ for discoverability
mkdir -p "$ROOT/etc/meshbay"
if [ -f "$ROOT/opt/meshbay-hub/share/hub.toml.example" ]; then
    cp "$ROOT/opt/meshbay-hub/share/hub.toml.example" "$ROOT/etc/meshbay/"
fi

# --- Systemd unit ---------------------------------------------------------
mkdir -p "$ROOT/usr/lib/systemd/system"
cp "$REPO/packaging/systemd/meshbay-hub.service" \
   "$ROOT/usr/lib/systemd/system/meshbay-hub.service"

echo "==> meshbay-hub staging ready at $ROOT"