import { SharedProviderMetadata } from "../provider/index.js";
import { JSONValue } from "../json.js";
import { IN_PROGRESS, COMPLETED, FAILED, INTERRUPTIBLE, UNINTERRUPTIBLE } from "../constants.js";
export type LanguageModelItem = Message | Reasoning | ToolCall | ToolResult;
/**
 * A subset of LanguageModelItem that excludes items that wouldn't
 * make sense for a model to generate (e.g. system/user messages, tool results).
 */
export type LanguageModelResponseItem = AssistantMessage | Reasoning | ToolCall | ToolResult;
export interface SharedBase {
    /**
     * Optional provider-specific metadata for the text part.
     */
    providerMetadata?: SharedProviderMetadata;
}
/**
 * Shared base for language model items.
 */
export interface LanguageModelItemBase extends SharedBase {
    /**
     * A unique identifier for the item. Optional by default.
     */
    id?: string;
}
/**
 * Defines base properties common to all message or artifact parts.
 */
export interface PartBase extends SharedBase {
    /** Optional metadata associated with this part. */
    metadata?: Record<string, unknown>;
}
/**
 * Text that the model has generated.
 */
export interface TextPart extends PartBase {
    readonly kind: "text";
    /**
     * The text content.
     */
    text: string;
}
/**
 * Base properties for file parts.
 */
interface FilePartBase extends PartBase {
    readonly kind: "file";
    /**
     * The IANA media type of the file, e.g. `image/png` or `audio/mp3`.
     *
     * @see https://www.iana.org/assignments/media-types/media-types.xhtml
     */
    mimeType: string;
    /**
     * Optional filename for the file
     */
    filename?: string;
}
/**
 * A file with inline data (base64 string or binary).
 */
export interface FilePartWithData extends FilePartBase {
    /**
     * File data as base64 encoded string or binary data.
     */
    data: string | Uint8Array;
    /**
     * The `uri` property must be absent when `data` is present.
     */
    uri?: never;
}
/**
 * A file referenced by URI.
 */
export interface FilePartWithUri extends FilePartBase {
    /**
     * A URL pointing to the file's content.
     */
    uri: string;
    /**
     * The `data` property must be absent when `uri` is present.
     */
    data?: never;
}
/**
 * A file that has been generated by the model or referenced by URI.
 */
export type FilePart = FilePartWithData | FilePartWithUri;
/**
 * Represents a structured data segment (e.g., JSON) within a message or artifact.
 */
export interface DataPart extends PartBase {
    readonly kind: "data";
    /**
     * The structured data content.
     */
    data: Record<string, unknown>;
}
export type MessagePart = TextPart | FilePart | DataPart;
/**
 * Reasoning that the model has generated.
 */
export interface Reasoning extends LanguageModelItemBase {
    readonly kind: "reasoning";
    /**
     * The reasoning content
     */
    text: string;
}
export interface MessageBase extends SharedBase {
    readonly kind: "message";
    /**
     * The unique identifier for the message.
     */
    id: string;
    /**
     * The content parts of the message.
     */
    content: MessagePart[];
    /**
     * Optional additional metadata for the message
     */
    metadata?: Record<string, unknown>;
}
export interface SystemMessage extends MessageBase {
    /**
     * Representing a system message to the user
     */
    readonly role: "system";
}
export interface AssistantMessage extends MessageBase {
    /**
     * Representing a message from the assistant
     */
    readonly role: "assistant";
}
export interface UserMessage extends MessageBase {
    /**
     * Representing a message from the user
     */
    readonly role: "user";
}
export type Message = SystemMessage | AssistantMessage | UserMessage;
/**
 * Tool calls that the model has generated.
 */
export interface ToolCall extends LanguageModelItemBase {
    readonly kind: "tool.call";
    /**
     * The identifier of the tool call. It must be unique across all tool calls.
     */
    callId: string;
    /**
     * The id of the tool that should be called.
     */
    toolId: string;
    /**
     * The state of the tool call.
     */
    state: ToolCallState;
    /**
     * The stringified JSON object with the arguments of the tool call.
     */
    arguments: string;
}
/**
 * Result of a tool call that has been executed by the provider.
 */
export interface ToolResult extends LanguageModelItemBase {
    readonly kind: "tool.result";
    /**
     * The ID of the tool call that this result is associated with.
     */
    callId: string;
    /**
     * Name of the tool that generated this result.
     */
    toolId: string;
    /**
     * The state of the tool call.
     */
    state: ToolCallState;
    /**
     * Result of the tool call. This is a JSON-serializable object.
     */
    result: JSONValue | null;
    /**
     * Error message if the tool call failed
     */
    error: string | null;
}
/**
 * State of a tool call execution.
 */
export type ToolCallState = typeof IN_PROGRESS | typeof COMPLETED | typeof FAILED | typeof INTERRUPTIBLE | typeof UNINTERRUPTIBLE;
export {};
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