import { Settings } from '../types/index.cjs';

/**
 * Model factory — hybrid Strands-native + Vercel AI SDK bridge.
 *
 * Native Strands models are used where they work cleanly in the browser:
 *   - anthropic → AnthropicModel (dangerouslyAllowBrowser)
 *   - openai    → OpenAIModel    (dangerouslyAllowBrowser)
 *   - google    → GoogleModel    (browser-friendly by default)
 *
 * Everything else — including Bedrock with bearer-token auth — goes
 * through VercelModel wrapping the corresponding @ai-sdk/<provider>.
 * This unlocks ~8 extra providers without writing any glue:
 *   - bedrock    → @ai-sdk/amazon-bedrock (bearer token, no SigV4)
 *   - openrouter → @openrouter/ai-sdk-provider (300+ models behind 1 key)
 *   - groq, mistral, deepseek, cohere, perplexity, xai → their @ai-sdk/* pkgs
 *   - webllm     → VercelModel + @browser-ai/web-llm (on-device)
 *
 * Why hybrid? Native models have slightly richer event shapes (reasoning,
 * cache deltas, citations) that don't round-trip through LanguageModelV3
 * cleanly yet. For the providers where that matters (Anthropic / OpenAI /
 * Google direct) we stay native; for the rest VercelModel is excellent.
 *
 * See:
 *   - https://github.com/strands-agents/sdk-typescript/tree/main/packages/sdk/src/models
 *   - https://sdk.vercel.ai/providers/ai-sdk-providers
 */

declare function createModel(settings: Settings): Promise<any>;

export { createModel };