#!/bin/sh
set -e

EVOLV_DIR="/data/evolv"
USER_DIR="/data"

echo "=== EVOLV Node-RED Development Container ==="
echo "Starting at $(date)"

# -------------------------------------------------------
# 1. Verify node_modules exist (first start or volume wipe)
# -------------------------------------------------------
if [ ! -d "$EVOLV_DIR/node_modules" ]; then
    echo "[entrypoint] node_modules missing — running npm install..."
    cd "$EVOLV_DIR"
    npm install --ignore-scripts
    echo "[entrypoint] npm install complete."
fi

# -------------------------------------------------------
# 2. Repair generalFunctions symlink if broken by bind mount
# -------------------------------------------------------
GF_LINK="$EVOLV_DIR/node_modules/generalFunctions"
GF_TARGET="$EVOLV_DIR/nodes/generalFunctions"

if [ -L "$GF_LINK" ] && [ ! -e "$GF_LINK" ]; then
    echo "[entrypoint] Repairing broken generalFunctions symlink..."
    rm -f "$GF_LINK"
    ln -s "$GF_TARGET" "$GF_LINK"
    echo "[entrypoint] Symlink repaired."
elif [ ! -e "$GF_LINK" ]; then
    echo "[entrypoint] Creating generalFunctions symlink..."
    ln -s "$GF_TARGET" "$GF_LINK"
    echo "[entrypoint] Symlink created."
fi

# -------------------------------------------------------
# 3. Install EVOLV into Node-RED user dir
#    This ensures node-red.nodes mapping is discovered
# -------------------------------------------------------
if [ ! -f "$USER_DIR/package.json" ]; then
    echo "[entrypoint] Initializing Node-RED user dir..."
    cat > "$USER_DIR/package.json" << 'PKGJSON'
{
    "name": "evolv-nodered-userdir",
    "description": "Node-RED user directory for EVOLV dev",
    "version": "1.0.0",
    "private": true,
    "dependencies": {}
}
PKGJSON
fi

# Link EVOLV package into the Node-RED user dir
cd "$USER_DIR"
npm install --no-save "$EVOLV_DIR" 2>/dev/null || {
    echo "[entrypoint] npm install of EVOLV package failed, attempting symlink fallback..."
    mkdir -p "$USER_DIR/node_modules"
    rm -rf "$USER_DIR/node_modules/EVOLV"
    ln -s "$EVOLV_DIR" "$USER_DIR/node_modules/EVOLV"
}

echo "[entrypoint] EVOLV nodes installed into Node-RED user dir."

# -------------------------------------------------------
# 4. Deploy demo flow if no user flow exists yet
# -------------------------------------------------------
DEMO_FLOW="$EVOLV_DIR/docker/demo-flow.json"
FLOW_FILE="/data/flows.json"

if [ -f "$DEMO_FLOW" ]; then
    # Deploy demo flow if flows.json is missing or is the default stub
    if [ ! -f "$FLOW_FILE" ] || grep -q "WARNING: please check" "$FLOW_FILE" 2>/dev/null; then
        echo "[entrypoint] Deploying demo flow..."
        cp "$DEMO_FLOW" "$FLOW_FILE"
        echo "[entrypoint] Demo flow deployed to $FLOW_FILE"
    fi
fi

# -------------------------------------------------------
# 5. Start Node-RED with custom settings
# -------------------------------------------------------
echo "[entrypoint] Starting Node-RED..."
exec node-red --settings "$EVOLV_DIR/docker/settings.js"