import type { ProviderOptions } from '@ai-sdk/provider-utils';
import type { JSONValue } from '../utils/json';
export type MessageRole = 'system' | 'user' | 'assistant' | 'tool';
export type MessageContent = ContentText | ContentToolCall | ContentInvalidToolCall | ContentReasoning | ContentReasoningFile | ContentFile | ContentCitation | ContentCustom | ContentProvider;
export interface ContentMetadata {
    providerMetadata?: Record<string, unknown>;
    providerOptions?: ProviderOptions;
}
export type ContentCitation = ContentMetadata & {
    type: 'citation';
    source?: string;
    url?: string;
    title?: string;
    startIndex?: number;
    endIndex?: number;
    text?: string;
};
export type ContentText = ContentMetadata & {
    type: 'text';
    text: string;
};
export type ContentReasoning = ContentMetadata & {
    type: 'reasoning';
    text: string;
};
export interface ContentFileRef {
    id: string;
    fileName?: string;
    sizeBytes?: number;
}
export type ContentFile = ContentMetadata & {
    type: 'file';
    mediaType?: string;
    data?: Uint8Array | ArrayBuffer | Buffer | string;
    fileRef?: ContentFileRef;
};
export type ContentReasoningFile = ContentMetadata & {
    type: 'reasoning-file';
    data: ContentFile['data'];
    mediaType: string;
};
export type ContentCustom = ContentMetadata & {
    type: 'custom';
    kind: `${string}.${string}`;
};
export type ContentToolCall = ContentMetadata & {
    type: 'tool-call';
    toolCallId: string;
    toolName: string;
    input: JSONValue;
    providerExecuted?: boolean;
} & ({
    state: 'pending';
} | {
    state: 'resolved';
    output: JSONValue;
    canceled?: boolean;
} | {
    state: 'rejected';
    error: string;
});
export type ContentInvalidToolCall = ContentMetadata & {
    type: 'invalid-tool-call';
    toolCallId?: string;
    error?: string;
    args?: JSONValue;
    name?: string;
};
export type ContentProvider = ContentMetadata & {
    type: 'provider';
    value: Record<string, unknown>;
};
export interface Message {
    id?: string;
    type?: 'llm';
    role: MessageRole;
    content: MessageContent[];
    name?: string;
    providerOptions?: ProviderOptions;
}
export interface AgentMessageBase {
    type: 'agent';
}
export interface CustomAgentMessages {
    ___dummyCustomMessage: {
        dummy: string;
    };
}
export type CustomAgentMessage = {
    type: 'custom';
    data: CustomAgentMessages[keyof CustomAgentMessages];
};
export type AgentMessage = Message | CustomAgentMessage;
export type AgentDbMessage = {
    id: string;
    createdAt: Date;
} & AgentMessage;
export declare function stripHydratedFileData<T extends AgentMessage>(message: T): T;