Advanced AI Prompt for CloudWatch Dashboards as Code via AWS CDK

Act as an AWS CDK Infrastructure Developer. Write an elegant, highly modular TypeScript AWS CDK script to programmatically generate a comprehensive CloudWatch Dashboard named [DASHBOARD_NAME] securely within the [STACK_NAME] deployment stack. The dashboard layout must dynamically arrange complex [WIDGET_TYPES] (e.g., Multi-Line Graphs, single-stat Gauges, and Markdown Text widgets) targeting the specific [METRIC_ARRAY] data points. Crucially, you must architect and implement a reusable TypeScript `MetricFactory` class designed to absolutely standardize metric namespace creation, statistic types (p99 vs avg), and period formatting across multiple disparate environments (Dev/Prod). Ensure the dashboard script injects custom hex colors for distinct data lines and hardcodes horizontal Y-axis annotations to visually represent absolute failure SLAs.