#!/usr/bin/env bash
#
# Pre-push hook: Run nix flake check
#
# This hook validates that the flake configuration is valid
# and all checks pass before pushing to remote.

set -euo pipefail

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

# Get repository root
REPO_ROOT="$(git rev-parse --show-toplevel)"

echo "==> Running nix flake check..."

# Check if flake.nix exists
if [ ! -f "$REPO_ROOT/flake.nix" ]; then
    echo -e "${YELLOW}⚠ WARNING: flake.nix not found, skipping nix flake check${NC}"
    exit 0
fi

# Run nix flake check
if nix flake check "$REPO_ROOT" --show-trace 2>&1; then
    echo -e "${GREEN}✓ nix flake check passed${NC}"
    exit 0
else
    echo -e "${RED}✗ nix flake check failed${NC}"
    echo ""
    echo "Push blocked. Please fix the flake errors and try again."
    echo "Debug with: nix flake check --show-trace"
    exit 1
fi