/**
 * BedrockProvider — wraps AWS Bedrock's Converse API as an `LLMProvider`.
 *
 * Pattern: Adapter (GoF) + Ports-and-Adapters (Cockburn 2005).
 * Role:    Outer ring — translates `LLMRequest`/`LLMResponse` to/from
 *          AWS Bedrock's model-agnostic Converse / ConverseStream APIs.
 *          Works with ANY Bedrock-hosted model (Claude, Llama, Mistral,
 *          Titan, Mixtral, ...) without format-specific code.
 * Emits:   N/A.
 *
 * Requires: `npm install @aws-sdk/client-bedrock-runtime`
 *
 * The Converse API is model-agnostic — one adapter covers every
 * Bedrock-hosted model (Claude, Llama, Mistral, Titan, Mixtral, ...).
 *
 * Tool calling works on BOTH paths: `complete()` reads `toolUse` blocks
 * off the Converse response, and `stream()` accumulates ConverseStream
 * `contentBlockStart` / `contentBlockDelta` / `contentBlockStop` events
 * (keyed by `contentBlockIndex`, so parallel tool calls that interleave
 * are parsed correctly) and delivers them on the terminal chunk's
 * `response.toolCalls`. A parity test pins the two paths together.
 *
 * ─── Limitations ────────────────────────────────────────────────────
 *
 * • Multi-modal NOT supported  (text content only).
 * • Guardrail integration NOT exposed yet — pass via the SDK client
 *   directly if needed.
 */
import type { LLMCallHooks, LLMChunk, LLMProvider, LLMRequest, LLMResponse } from '../types.js';
interface BedrockClient {
    send(command: unknown): Promise<unknown>;
}
interface BedrockConverseCommand {
    modelId: string;
    messages: BedrockMessage[];
    system?: Array<{
        text: string;
    }>;
    toolConfig?: {
        tools: BedrockTool[];
    };
    inferenceConfig?: {
        maxTokens?: number;
        temperature?: number;
        stopSequences?: string[];
    };
}
interface BedrockMessage {
    role: 'user' | 'assistant';
    content: BedrockContentBlock[];
}
type BedrockContentBlock = {
    text: string;
} | {
    toolUse: {
        toolUseId: string;
        name: string;
        input: Record<string, unknown>;
    };
} | {
    toolResult: {
        toolUseId: string;
        content: Array<{
            text: string;
        }>;
        status?: 'success' | 'error';
    };
};
interface BedrockTool {
    toolSpec: {
        name: string;
        description: string;
        inputSchema: {
            json: Record<string, unknown>;
        };
    };
}
/**
 * ConverseStream event shapes we consume.
 *
 * Note the asymmetry with the non-streaming API: `toolUse.input` is a
 * fully-formed OBJECT on a Converse response, but a JSON **string
 * fragment** on a ConverseStream delta. Fragments arrive across many
 * events and must be joined before parsing, and blocks are addressed by
 * `contentBlockIndex` because parallel tool calls interleave.
 */
export interface BedrockStreamEvent {
    contentBlockStart?: {
        contentBlockIndex?: number;
        start?: {
            toolUse?: {
                toolUseId?: string;
                name?: string;
            };
        };
    };
    contentBlockDelta?: {
        contentBlockIndex?: number;
        delta?: {
            text?: string;
            toolUse?: {
                input?: string;
            };
        };
    };
    contentBlockStop?: {
        contentBlockIndex?: number;
    };
    messageStop?: {
        stopReason?: string;
    };
    metadata?: {
        usage?: {
            inputTokens: number;
            outputTokens: number;
        };
    };
}
export interface BedrockProviderOptions {
    /** AWS region (e.g., 'us-east-1'). Defaults to AWS SDK auto-detect. */
    readonly region?: string;
    /**
     * Default model id (e.g., `anthropic.claude-sonnet-4-5-20250929-v1:0`).
     * Used when `LLMRequest.model` is the shorthand `'bedrock'`.
     */
    readonly defaultModel?: string;
    /** Default max tokens when not in the request. Default 4096. */
    readonly defaultMaxTokens?: number;
    /** @internal Pre-built client for testing. */
    readonly _client?: BedrockClient;
    /**
     * @internal Test override for the SDK's command constructors. Real
     * use goes through the dynamic `require('@aws-sdk/client-bedrock-runtime')`.
     */
    readonly _commands?: {
        readonly Converse: new (input: BedrockConverseCommand) => unknown;
        readonly ConverseStream: new (input: BedrockConverseCommand) => unknown;
    };
}
export declare function bedrock(options?: BedrockProviderOptions): LLMProvider;
export declare class BedrockProvider implements LLMProvider {
    readonly name = "bedrock";
    private readonly inner;
    constructor(options?: BedrockProviderOptions);
    complete(req: LLMRequest, hooks?: LLMCallHooks): Promise<LLMResponse>;
    stream(req: LLMRequest, hooks?: LLMCallHooks): AsyncIterable<LLMChunk>;
}
export {};
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