export type ChatStatus = 'submitted' | 'streaming' | 'ready' | 'error';
export type TextUIPart = {
    type: 'text';
    value: string;
};
export type FileUIPart = {
    type: 'file';
    /**
     * IANA media type of the file.
     */
    mediaType: string;
    /**
     * Optional filename of the file.
     */
    filename?: string;
    /**
     * The URL of the file.
     * It can either be a URL to a hosted file or a Data URL.
     */
    url: string;
};
/**
 * Simplified ToolUIPart type for basic tool rendering.
 * Full type in AI SDK is more complex with generics and state management.
 */
export type ToolUIPart = {
    type: string;
    toolCallId?: string;
    toolName?: string;
    input?: unknown;
    output?: unknown;
    errorText?: string;
    state?: 'input-streaming' | 'input-available' | 'output-available' | 'output-error';
};
export type MessageUIPart = TextUIPart | FileUIPart | ToolUIPart;
export interface UIMessage<METADATA = unknown> {
    /**
     * A unique identifier for the message.
     */
    id: string;
    /**
     * The role of the message.
     */
    role: 'system' | 'user' | 'assistant';
    /**
     * The metadata of the message.
     */
    metadata?: METADATA;
    /**
     * The parts of the message. Use this for rendering the message in the UI.
     */
    parts: Array<MessageUIPart>;
}