#!/bin/bash
set -e

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

FEATURE_NAME=$1
if [ -z "$FEATURE_NAME" ]; then
    echo -e "${RED}Error: Feature name is required${NC}"
    echo "Usage: $0 <feature-name>"
    echo "Example: $0 user-settings"
    exit 1
fi

# Convert kebab-case to PascalCase and camelCase
FEATURE_PASCAL=$(echo $FEATURE_NAME | sed -r 's/(^|-)([a-z])/\U\2/g')
FEATURE_CAMEL=$(echo $FEATURE_PASCAL | sed 's/^./\l&/')

echo -e "${GREEN}Creating Modified Feature Capsule: $FEATURE_NAME${NC}"

# Backend Feature Capsule
BACKEND_DIR="backend/src/features/$FEATURE_NAME"
mkdir -p "$BACKEND_DIR"/{api,domain,data,migrations,external,events,tests/{unit,integration,fixtures},docs}

# Create Feature README
cat > "$BACKEND_DIR/README.md" << EOF
# $FEATURE_PASCAL Feature Capsule

## Quick Summary (50 tokens)
[AI: Complete feature description, main operations, dependencies, caching strategy]

## API Endpoints
- GET /api/$FEATURE_NAME - List all $FEATURE_NAME
- GET /api/$FEATURE_NAME/:id - Get specific $FEATURE_CAMEL
- POST /api/$FEATURE_NAME - Create new $FEATURE_CAMEL
- PUT /api/$FEATURE_NAME/:id - Update $FEATURE_CAMEL
- DELETE /api/$FEATURE_NAME/:id - Delete $FEATURE_CAMEL

## Structure
- **api/** - HTTP endpoints, routes, validators
- **domain/** - Business logic, types, rules
- **data/** - Repository, database queries
- **migrations/** - Feature-specific schema
- **external/** - External API integrations
- **events/** - Event handlers
- **tests/** - All feature tests
- **docs/** - Detailed documentation

## Dependencies
- Internal: core/auth, core/cache
- External: [List any external APIs]
- Database: $FEATURE_NAME table

## Quick Commands
\`\`\`bash
# Run feature tests
npm test -- features/$FEATURE_NAME

# Run migrations (all features)
npm run migrate:all
\`\`\`
EOF

# Create index.ts (Public API)
cat > "$BACKEND_DIR/index.ts" << EOF
/**
 * @ai-summary Public API for $FEATURE_NAME feature capsule
 * @ai-note This is the ONLY file other features should import from
 */

// Export service for use by other features
export { ${FEATURE_PASCAL}Service } from './domain/${FEATURE_CAMEL}.service';

// Export types needed by other features
export type {
  ${FEATURE_PASCAL},
  Create${FEATURE_PASCAL}Request,
  Update${FEATURE_PASCAL}Request,
  ${FEATURE_PASCAL}Response
} from './domain/${FEATURE_CAMEL}.types';

// Internal: Register routes with Express app
export { register${FEATURE_PASCAL}Routes } from './api/${FEATURE_CAMEL}.routes';
EOF

echo -e "${GREEN}✅ Feature capsule created: $FEATURE_NAME${NC}"
echo -e "${YELLOW}Next steps:${NC}"
echo "1. Implement business logic in domain/${FEATURE_CAMEL}.service.ts"
echo "2. Add database columns to migrations/"
echo "3. Implement API validation"
echo "4. Add tests"
echo "5. Register routes in backend/src/app.ts"