import type { AIToolCallResult, AIToolDefinition } from '@gitbook/api';
import type { IconName } from '@gitbook/icons';

/**
 * Confirmation action to be displayed to the user before executing a tool.
 */
export type GitBookToolConfirmation = {
    icon?: IconName;
    label: string;

    /**
     * Supporting context displayed to the user above the confirmation dialog,
     * to help them understand what they are approving or rejecting.
     * Limited to 512 characters.
     */
    context?: string;
};

/**
 * Custom tool definition to be passed to the AI assistant.
 */
export type GitBookToolDefinition = AIToolDefinition & {
    /**
     * Confirmation action to be displayed to the user before executing the tool.
     * Provide a static object, or a function that receives the input provided by
     * the AI assistant and returns the confirmation — useful to display dynamic
     * context based on the arguments the tool is about to be executed with.
     */
    confirmation?: GitBookToolConfirmation | ((input: object) => GitBookToolConfirmation);

    /**
     * Callback when the tool is executed.
     * The input is provided by the AI assistant following the input schema of the tool.
     */
    execute: (input: object) => Promise<Pick<AIToolCallResult, 'output' | 'summary'>>;
};

/**
 * Custom button definition to be passed to the embeddable GitBook.
 */
export type GitBookEmbeddableActionDefinition = {
    /**
     * Icon to be displayed in the button.
     */
    icon: IconName;

    /**
     * Label to be displayed in the button.
     */
    label: string;

    /**
     * Callback when the button is clicked.
     */
    onClick: () => void | Promise<void>;
};

/**
 * Overall configuration for the layout of the GitBook embed.
 */
export type GitBookEmbeddableConfiguration = {
    /** Tabs to display in the embed (if enabled on the site). */
    tabs: ('assistant' | 'docs' | 'search')[];

    /** Tab to open the embed on. */
    defaultTab?: 'assistant' | 'docs' | 'search';

    /** Page to open the docs tab on, instead of the site's home page. */
    defaultPage?: string;

    /** Additional buttons to be displayed in the header of the GitBook embed. */
    actions: GitBookEmbeddableActionDefinition[];

    /**
     * Additional buttons to be displayed in the header of the GitBook embed.
     * @deprecated Use `actions` instead.
     */
    buttons?: GitBookEmbeddableActionDefinition[];

    /** Message to be displayed in the welcome page. */
    greeting: {
        title: string;
        subtitle: string;
    };

    /**
     * Override the assistant name displayed in the UI.
     * Limited to 32 characters.
     */
    assistantName?: string;

    /** Suggestions of questions to be displayed in the welcome page. */
    suggestions: string[];

    /** Tools to be provided to the assistant. */
    tools: GitBookToolDefinition[];

    /**
     * Display GitBook branding in the embed.
     */
    trademark?: boolean;

    /**
     * Display a close button inside the assistant.
     */
    closeButton?: boolean;
};

/**
 * Messages sent from the parent to the frame.
 */
export type ParentToFrameMessage =
    | {
          type: 'postUserMessage';
          message: string;
      }
    | {
          type: 'clearChat';
      }
    | {
          type: 'configure';
          settings: GitBookEmbeddableConfiguration;
      }
    | {
          type: 'navigateToPage';
          pagePath: string;
      }
    | {
          type: 'navigateToAssistant';
      };

/**
 * Messages sent from the frame to the parent.
 */
export type FrameToParentMessage = {
    type: 'close';
};