#!/bin/bash
set -e

echo "======================================"
echo "🔍 Pre-Deployment Checks"
echo "======================================"

ERRORS=0

# Check 1: Frontend build
echo ""
echo "1️⃣  Checking frontend build..."
cd /root/maternal-app/maternal-web
if npm run build > /tmp/frontend-build.log 2>&1; then
  echo "✅ Frontend build successful"
else
  echo "❌ Frontend build failed"
  echo "See /tmp/frontend-build.log for details"
  ERRORS=$((ERRORS + 1))
fi

# Check 2: Backend build
echo ""
echo "2️⃣  Checking backend build..."
cd /root/maternal-app/maternal-app/maternal-app-backend
if npm run build > /tmp/backend-build.log 2>&1; then
  echo "✅ Backend build successful"
else
  echo "❌ Backend build failed"
  echo "See /tmp/backend-build.log for details"
  tail -20 /tmp/backend-build.log
  ERRORS=$((ERRORS + 1))
fi

# Check 2.5: Admin Panel build
echo ""
echo "2️⃣.5 Checking admin panel build..."
cd /root/maternal-app/parentflow-admin
if npm run build > /tmp/admin-build.log 2>&1; then
  echo "✅ Admin panel build successful"
else
  echo "❌ Admin panel build failed"
  echo "See /tmp/admin-build.log for details"
  tail -20 /tmp/admin-build.log
  ERRORS=$((ERRORS + 1))
fi

# Check 3: Uncommitted changes
echo ""
echo "3️⃣  Checking for uncommitted changes..."
cd /root/maternal-app
if [ -z "$(git status --porcelain)" ]; then
  echo "✅ No uncommitted changes"
else
  echo "⚠️  Uncommitted changes detected:"
  git status --short
  echo ""
  echo "You may want to commit these before deploying"
fi

# Check 4: Current branch
echo ""
echo "4️⃣  Checking current branch..."
BRANCH=$(git branch --show-current)
if [ "$BRANCH" = "main" ] || [ "$BRANCH" = "master" ]; then
  echo "✅ On branch: $BRANCH"
else
  echo "⚠️  On branch: $BRANCH (not main/master)"
fi

# Check 5: Remote sync
echo ""
echo "5️⃣  Checking if local is ahead of remote..."
git fetch origin --quiet
LOCAL=$(git rev-parse @)
REMOTE=$(git rev-parse @{u})
if [ "$LOCAL" = "$REMOTE" ]; then
  echo "✅ Local and remote are in sync"
elif [ "$LOCAL" != "$REMOTE" ]; then
  AHEAD=$(git rev-list --count @{u}..HEAD)
  if [ "$AHEAD" -gt 0 ]; then
    echo "⚠️  Local is $AHEAD commit(s) ahead of remote (need to push)"
  else
    echo "⚠️  Local is behind remote (need to pull)"
  fi
fi

# Check 6: Pending migrations
echo ""
echo "6️⃣  Checking for pending migrations..."
cd /root/maternal-app/maternal-app/maternal-app-backend
MIGRATIONS=$(find src/database/migrations -name "*.ts" 2>/dev/null | wc -l)
echo "Found $MIGRATIONS migration files"

# Check 7: Environment files
echo ""
echo "7️⃣  Checking environment files..."
if [ -f "/root/maternal-app/maternal-web/.env.local" ]; then
  echo "✅ Frontend .env.local exists"
else
  echo "⚠️  Frontend .env.local not found"
fi

if [ -f "/root/maternal-app/maternal-app/maternal-app-backend/.env" ]; then
  echo "✅ Backend .env exists"
else
  echo "⚠️  Backend .env not found"
fi

if [ -f "/root/maternal-app/parentflow-admin/.env.local" ]; then
  echo "✅ Admin panel .env.local exists"
else
  echo "⚠️  Admin panel .env.local not found"
fi

# Summary
echo ""
echo "======================================"
if [ $ERRORS -eq 0 ]; then
  echo "✅ All critical checks passed! Ready to deploy."
  echo ""
  echo "📋 Next steps:"
  echo "  1. Review any warnings above"
  echo "  2. git add . (if uncommitted changes)"
  echo "  3. git commit -m 'your message'"
  echo "  4. git push origin main"
  echo "  5. SSH to production server"
  echo "  6. Run: /var/www/maternal-app/deploy.sh"
  echo ""
else
  echo "❌ $ERRORS critical check(s) failed!"
  echo ""
  echo "Fix the following before deploying:"
  if [ -f /tmp/frontend-build.log ]; then
    echo "  - Frontend build errors"
  fi
  if [ -f /tmp/backend-build.log ]; then
    echo "  - Backend build errors"
  fi
  if [ -f /tmp/admin-build.log ]; then
    echo "  - Admin panel build errors"
  fi
  echo ""
  exit 1
fi
echo "======================================"