import dotenv from 'dotenv';
import { XMLBuilder, XMLParser } from 'fast-xml-parser';
import { escape } from 'lodash'; // Imported escape from lodash
import OpenAI from 'openai';
import { DocumentOptions } from '../../../../documents/Documents';
import { AnswerParser } from '../response_parsers/AnswerParser';
import { StreamedAnswerParser } from '../response_parsers/StreamedAnswerParser';
import { BaseTool } from '../tools/BaseTool';
import { CalculateTool } from '../tools/CalculateTool';
//import { CreateAnyDocumentTool } from '../tools/CreateAnyDocTool';
import { DataAnalysisTool } from '../tools/DataAnalysisTool';
import { DocumentMetadataTool } from '../tools/DocumentMetadataTool';
import { ImageCreationTool } from '../tools/ImageCreationTool';
import { NoTool } from '../tools/NoTool';
import { SearchTool } from '../tools/SearchTool';
import { Parameter, ParametersType, TypeMap } from '../types/tool_types';
import { AgentMessage, ASSISTANT_ROLE, AssistantMessage, Observation, PROCESSING_TYPE, ProcessingInfo, TEXT_TYPE } from '../types/types';
import { Vectorstore } from '../vectorstore/Vectorstore';
import { getReactPrompt } from './prompts';
//import { DictionaryTool } from '../tools/DictionaryTool';
import { ChatCompletionMessageParam } from 'openai/resources';
import { Upload } from '../../../../../server/SharedMediaTypes';
import { DocumentView } from '../../DocumentView';
import { CodebaseSummarySearchTool } from '../tools/CodebaseSummarySearchTool';
import { CreateLinksTool } from '../tools/CreateLinksTool';
import { CreateNewTool } from '../tools/CreateNewTool';
import { FileContentTool } from '../tools/FileContentTool';
import { FileNamesTool } from '../tools/FileNamesTool';
import { RAGTool } from '../tools/RAGTool';
import { SortDocsTool } from '../tools/SortDocsTool';
import { TagDocsTool } from '../tools/TagDocsTool';
import { TakeQuizTool } from '../tools/TakeQuizTool';
import { GPTTutorialTool } from '../tools/TutorialTool';
import { WebsiteInfoScraperTool } from '../tools/WebsiteInfoScraperTool';
import { AgentDocumentManager } from '../utils/AgentDocumentManager';
import { FilterDocsTool } from '../tools/FilterDocsTool';
import { CanvasDocsTool } from '../tools/CanvasDocsTool';
import { UIControlTool } from '../tools/UIControlTool';

dotenv.config();

/**
 * The Agent class handles the interaction between the assistant and the tools available,
 * processes user queries, and manages the communication flow between the tools and OpenAI.
 */
export class Agent {
    // Private properties
    private client: OpenAI;
    private messages: AgentMessage[] = [];
    private interMessages: AgentMessage[] = [];
    private vectorstore: Vectorstore;
    private _history: () => string;
    private _csvData: () => { filename: string; id: string; text: string }[];
    private actionNumber: number = 0;
    private thoughtNumber: number = 0;
    private processingNumber: number = 0;
    private processingInfo: ProcessingInfo[] = [];
    private streamedAnswerParser: StreamedAnswerParser = new StreamedAnswerParser();
    private tools: Record<string, BaseTool<ReadonlyArray<Parameter>>>;
    private _docManager: AgentDocumentManager;
    private is_dash_doc_assistant: boolean;
    private parentView: DocumentView;
    // Dynamic tool registry for tools created at runtime
    private dynamicToolRegistry: Map<string, BaseTool<ReadonlyArray<Parameter>>> = new Map();
    // Callback for notifying when tools are created and need reload
    private onToolCreatedCallback?: (toolName: string) => void;
    // Storage for deferred tool saving
    private pendingToolSave?: { toolName: string; completeToolCode: string };

    /**
     * The constructor initializes the agent with the vector store and toolset, and sets up the OpenAI client.
     * @param _vectorstore Vector store instance for document storage and retrieval.
     * @param summaries A function to retrieve document summaries (deprecated, now using docManager directly).
     * @param history A function to retrieve chat history.
     * @param csvData A function to retrieve CSV data linked to the assistant.
     * @param getLinkedUrlDocId A function to get document IDs from URLs.
     * @param createImage A function to create images in the dashboard.
     * @param createCSVInDash A function to create a CSV document in the dashboard.
     * @param docManager The document manager instance.
     */
    constructor(
        _vectorstore: Vectorstore,
        history: () => string,
        csvData: () => { filename: string; id: string; text: string }[],
        createImage: (result: Upload.FileInformation & Upload.InspectionResults, options: DocumentOptions) => void,
        createCSVInDash: (url: string, title: string, id: string, data: string) => void,
        docManager: AgentDocumentManager
    ) {
        // Initialize OpenAI client with API key from environment
        this.client = new OpenAI({ apiKey: process.env.OPENAI_KEY, dangerouslyAllowBrowser: true });
        this.vectorstore = _vectorstore;
        this.parentView = docManager.parentViewDocument; // Get the parent DocumentView
        this._history = history;
        this._csvData = csvData;
        this._docManager = docManager;
        this.is_dash_doc_assistant = true; // Initialize to default value

        // Initialize dynamic tool registry
        this.dynamicToolRegistry = new Map();

        // Define available tools for the assistant
        this.tools = {
            calculate: new CalculateTool(),
            rag: new RAGTool(this.vectorstore),
            dataAnalysis: new DataAnalysisTool(csvData),
            websiteInfoScraper: new WebsiteInfoScraperTool(this._docManager),
            searchTool: new SearchTool(this._docManager),
            noTool: new NoTool(),
            imageCreationTool: new ImageCreationTool(createImage),
            documentMetadata: new DocumentMetadataTool(this._docManager),
            createLinks: new CreateLinksTool(this._docManager),
            codebaseSummarySearch: new CodebaseSummarySearchTool(this.vectorstore),
            fileContent: new FileContentTool(this.vectorstore),
            fileNames: new FileNamesTool(this.vectorstore),
            generateTutorialNode: new GPTTutorialTool(this._docManager),
            sortDocs: new SortDocsTool(this._docManager, this.parentView),
            tagDocs: new TagDocsTool(this._docManager, this.parentView),
            filterDocs: new FilterDocsTool(this._docManager, this.parentView),
            takeQuiz: new TakeQuizTool(this._docManager),
            canvasDocs: new CanvasDocsTool(),
            uiControl: new UIControlTool(),
        };

        // Add the createNewTool after other tools are defined
        this.tools.createNewTool = new CreateNewTool(this.dynamicToolRegistry, this.tools, this);

        // Load existing dynamic tools
        this.loadExistingDynamicTools();
    }

    /**
     * Loads every dynamic tool that the server reports via /getDynamicTools.
     *  • Uses dynamic `import()` so webpack/vite will code-split each tool automatically.
     *  • Registers the tool in `dynamicToolRegistry` under the name it advertises via
     *    `toolInfo.name`; also registers the legacy camel-case key if different.
     */
    private async loadExistingDynamicTools(): Promise<void> {
        try {
            console.log('Loading dynamic tools from server…');
            const toolFiles = await this.fetchDynamicToolList();

            let loaded = 0;
            for (const { name: className, path } of toolFiles) {
                // Legacy key (e.g., CharacterCountTool → characterCountTool)
                const legacyKey = className.replace(/^[A-Z]/, m => m.toLowerCase());

                // Skip if we already have the legacy key
                if (this.dynamicToolRegistry.has(legacyKey)) continue;

                try {
                    // @vite-ignore keeps Vite/Webpack from trying to statically analyse the variable part
                    const ToolClass = require(`../tools/${path}`)[className];

                    if (!ToolClass || !(ToolClass.prototype instanceof BaseTool)) {
                        console.warn(`File ${path} does not export a valid BaseTool subclass`);
                        continue;
                    }

                    const instance: BaseTool<ReadonlyArray<Parameter>> = new ToolClass();

                    // Prefer the tool’s self-declared name (matches <action> tag)
                    const key = (instance.name || '').trim() || legacyKey;

                    // Check for duplicates
                    if (this.dynamicToolRegistry.has(key)) {
                        console.warn(`Dynamic tool key '${key}' already registered – keeping existing instance`);
                        continue;
                    }

                    // ✅ register under the preferred key
                    this.dynamicToolRegistry.set(key, instance);

                    // optional: also register the legacy key for safety
                    if (key !== legacyKey && !this.dynamicToolRegistry.has(legacyKey)) {
                        this.dynamicToolRegistry.set(legacyKey, instance);
                    }

                    loaded++;
                    console.info(`✓ Loaded dynamic tool '${key}' from '${path}'`);
                } catch (err) {
                    console.error(`✗ Failed to load '${path}':`, err);
                }
            }

            console.log(`Dynamic-tool load complete – ${loaded}/${toolFiles.length} added`);
        } catch (err) {
            console.error('Dynamic-tool bootstrap failed:', err);
        }
    }

    /**
     * Manually registers a dynamic tool instance (called by CreateNewTool)
     */
    public registerDynamicTool(toolName: string, toolInstance: BaseTool<ReadonlyArray<Parameter>>): void {
        this.dynamicToolRegistry.set(toolName, toolInstance);
        console.log(`Manually registered dynamic tool: ${toolName}`);
    }

    /**
     * Notifies that a tool has been created and saved to disk (called by CreateNewTool)
     */
    public notifyToolCreated(toolName: string, completeToolCode: string): void {
        // Store the tool data for deferred saving
        this.pendingToolSave = { toolName, completeToolCode };

        if (this.onToolCreatedCallback) {
            this.onToolCreatedCallback(toolName);
        }
    }

    /**
     * Performs the deferred tool save operation (called after user confirmation)
     */
    public async performDeferredToolSave(): Promise<boolean> {
        if (!this.pendingToolSave) {
            console.warn('No pending tool save operation');
            return false;
        }

        const { toolName, completeToolCode } = this.pendingToolSave;

        try {
            // Get the CreateNewTool instance to perform the save
            const createNewTool = this.tools.createNewTool as any;
            if (createNewTool && typeof createNewTool.saveToolToServerDeferred === 'function') {
                const success = await createNewTool.saveToolToServerDeferred(toolName, completeToolCode);

                if (success) {
                    console.log(`Tool ${toolName} saved to server successfully via deferred save.`);
                    // Clear the pending save
                    this.pendingToolSave = undefined;
                    return true;
                } else {
                    console.warn(`Tool ${toolName} could not be saved to server via deferred save.`);
                    return false;
                }
            } else {
                console.error('CreateNewTool instance not available for deferred save');
                return false;
            }
        } catch (error) {
            console.error(`Error performing deferred tool save for ${toolName}:`, error);
            return false;
        }
    }

    /**
     * Sets the callback for when tools are created
     */
    public setToolCreatedCallback(callback: (toolName: string) => void): void {
        this.onToolCreatedCallback = callback;
    }

    /**
     * Public method to reload dynamic tools (called when new tools are created)
     */
    public reloadDynamicTools(): void {
        console.log('Reloading dynamic tools...');
        this.loadExistingDynamicTools();
    }

    private async fetchDynamicToolList(): Promise<{ name: string; path: string }[]> {
        const res = await fetch('/getDynamicTools');
        if (!res.ok) throw new Error(`Failed to fetch dynamic tool list – ${res.statusText}`);
        const json = await res.json();
        console.log('Dynamic tools fetched:', json.tools);
        return json.tools ?? [];
    }

    /**
     * This method handles the conversation flow with the assistant, processes user queries,
     * and manages the assistant's decision-making process, including tool actions.
     * @param question The user's question.
     * @param onProcessingUpdate Callback function for processing updates.
     * @param onAnswerUpdate Callback function for answer updates.
     * @param maxTurns The maximum number of turns to allow in the conversation.
     * @returns The final response from the assistant.
     */
    async askAgent(question: string, onProcessingUpdate: (processingUpdate: ProcessingInfo[]) => void, onAnswerUpdate: (answerUpdate: string) => void, maxTurns: number = 50): Promise<AssistantMessage> {
        console.log(`Starting query: ${question}`);
        const MAX_QUERY_LENGTH = 1000; // adjust the limit as needed

        // Check if the question exceeds the maximum length
        if (question.length > MAX_QUERY_LENGTH) {
            const errorText = `Your query is too long (${question.length} characters). Please shorten it to ${MAX_QUERY_LENGTH} characters or less and try again.`;
            console.warn(errorText); // Log the specific reason
            return {
                role: ASSISTANT_ROLE.ASSISTANT,
                // Use ERROR type for clarity in the UI if handled differently
                content: [{ text: errorText, index: 0, type: TEXT_TYPE.ERROR, citation_ids: null }],
                processing_info: [],
            };
        }

        const sanitizedQuestion = escape(question); // Sanitized user input

        // Push sanitized user's question to message history
        this.messages.push({ role: 'user', content: sanitizedQuestion });

        // Get system prompt with all tools (static + dynamic)
        const systemPrompt = this.getSystemPromptWithAllTools();

        // Initialize intermediate messages
        this.interMessages = [{ role: 'system', content: systemPrompt }];

        this.interMessages.push({
            role: 'user',
            content: this.constructUserPrompt(1, 'user', `<query>${sanitizedQuestion}</query>`),
        });

        // Setup XML parser and builder
        const parser = new XMLParser({
            ignoreAttributes: false,
            attributeNamePrefix: '@_',
            textNodeName: '_text',
            isArray: name => ['query', 'url'].indexOf(name) !== -1,
            processEntities: false, // Disable processing of entities
            stopNodes: ['*.entity'], // Do not process any entities
        });
        const builder = new XMLBuilder({ ignoreAttributes: false, attributeNamePrefix: '@_' });

        let currentAction: string | undefined;
        this.processingInfo = [];

        let i = 2;
        while (i < maxTurns) {
            console.log(this.interMessages);
            console.log(`Turn ${i}/${maxTurns}`);

            // eslint-disable-next-line no-await-in-loop
            const result = await this.execute(onProcessingUpdate, onAnswerUpdate);
            this.interMessages.push({ role: 'assistant', content: result });

            i += 2;

            let parsedResult;
            try {
                // Parse XML result from the assistant
                parsedResult = parser.parse(result);

                // Validate the structure of the parsedResult
                this.validateAssistantResponse(parsedResult);
            } catch (error) {
                throw new Error(`Error parsing or validating response: ${error}`);
            }

            // Extract the stage from the parsed result
            const stage = parsedResult.stage;
            if (!stage) {
                throw new Error(`Error: No stage found in response`);
            }

            // Handle different stage elements (thoughts, actions, inputs, answers)
            for (const key in stage) {
                if (key === 'thought') {
                    // Handle assistant's thoughts
                    console.log(`Thought: ${stage[key]}`);
                    this.processingNumber++;
                } else if (key === 'action') {
                    // Handle action stage
                    currentAction = stage[key] as string;
                    console.log(`Action: ${currentAction}`);

                    // Check both static tools and dynamic registry
                    const tool = this.tools[currentAction] || this.dynamicToolRegistry.get(currentAction);
                    if (currentAction === 'noTool') {
                        // Immediately ask for clarification in plain text, not as a tool prompt
                        this.interMessages.push({
                            role: 'user',
                            content: `<stage number="${i + 1}" role="assistant">
                                        <answer>
                                        I’m not sure what you’d like me to do.  Could you clarify your request?
                                        </answer>
                                    </stage>`,
                        });
                        break;
                    }
                    if (tool) {
                        // Prepare the next action based on the current tool
                        const nextPrompt = [
                            {
                                type: 'text',
                                text: `<stage number="${i + 1}" role="user">` + builder.build({ action_rules: tool.getActionRule() }) + `</stage>`,
                            } as Observation,
                        ];
                        this.interMessages.push({ role: 'user', content: nextPrompt });
                        break;
                    } else {
                        // Handle error in case of an invalid action
                        console.log(`Error: Action "${currentAction}" is not a valid tool`);
                        this.interMessages.push({
                            role: 'user',
                            content: `<stage number="${i + 1}" role="system-error-reporter">Action "${currentAction}" is not a valid tool, try again.</stage>`,
                        });
                        break;
                    }
                } else if (key === 'action_input') {
                    // Handle action input stage
                    const actionInput = stage[key];
                    console.log(`Action input full:`, actionInput);
                    console.log(`Action input:`, actionInput.inputs);

                    if (currentAction) {
                        try {
                            // Process the action with its input
                            // eslint-disable-next-line no-await-in-loop
                            const observation = (await this.processAction(currentAction, actionInput.inputs)) as Observation[];
                            const nextPrompt = [{ type: 'text', text: `<stage number="${i + 1}" role="user"> <observation>` }, ...observation, { type: 'text', text: '</observation></stage>' }] as Observation[];
                            console.log(observation);
                            this.interMessages.push({ role: 'user', content: nextPrompt });
                            this.processingNumber++;
                            console.log(`Tool ${currentAction} executed successfully. Observations:`, observation);

                            break;
                        } catch (error) {
                            console.error(`Error during execution of tool '${currentAction}':`, error);
                            const errorMessage = error instanceof Error ? error.message : String(error);
                            // Return an error observation formatted for the LLM loop
                            return {
                                role: ASSISTANT_ROLE.USER,
                                content: [
                                    {
                                        type: TEXT_TYPE.ERROR,
                                        text: `<observation><error tool="${currentAction}">Execution failed: ${escape(errorMessage)}</error></observation>`,
                                        index: 0,
                                        citation_ids: null,
                                    },
                                ],
                                processing_info: [],
                            };
                        }
                    } else {
                        throw new Error('Error: Action input without a valid action');
                    }
                } else if (key === 'answer') {
                    // If an answer is found, end the query
                    console.log('Answer found. Ending query.');
                    this.streamedAnswerParser.reset();
                    const parsedAnswer = AnswerParser.parse(result, this.processingInfo);
                    return parsedAnswer;
                }
            }
        }

        throw new Error('Reached maximum turns. Ending query.');
    }

    private constructUserPrompt(stageNumber: number, role: string, content: string): string {
        return `<stage number="${stageNumber}" role="${role}">${content}</stage>`;
    }

    /**
     * Executes a step in the conversation, processing the assistant's response and parsing it in real-time.
     * @param onProcessingUpdate Callback for processing updates.
     * @param onAnswerUpdate Callback for answer updates.
     * @returns The full response from the assistant.
     */
    private async execute(onProcessingUpdate: (processingUpdate: ProcessingInfo[]) => void, onAnswerUpdate: (answerUpdate: string) => void): Promise<string> {
        // Stream OpenAI response for real-time updates
        const stream = await this.client.chat.completions.create({
            model: 'gpt-4o',
            messages: this.interMessages as ChatCompletionMessageParam[],
            temperature: 0,
            stream: true,
            stop: ['</stage>'],
        });

        let fullResponse: string = '';
        let currentTag: string = '';
        let currentContent: string = '';
        let isInsideTag: boolean = false;

        // Process each chunk of the streamed response
        for await (const chunk of stream) {
            const content = chunk.choices[0]?.delta?.content || '';
            fullResponse += content;

            // Parse the streamed content character by character
            for (const char of content) {
                if (currentTag === 'answer') {
                    // Handle answer parsing for real-time updates
                    currentContent += char;
                    const streamedAnswer = this.streamedAnswerParser.parse(char);
                    onAnswerUpdate(streamedAnswer);
                    continue;
                } else if (char === '<') {
                    // Start of a new tag
                    isInsideTag = true;
                    currentTag = '';
                    currentContent = '';
                } else if (char === '>') {
                    // End of the tag
                    isInsideTag = false;
                    if (currentTag.startsWith('/')) {
                        currentTag = '';
                    }
                } else if (isInsideTag) {
                    // Append characters to the tag name
                    currentTag += char;
                } else if (currentTag === 'thought' || currentTag === 'action_input_description') {
                    // Handle processing information for thought or action input description
                    currentContent += char;
                    const current_info = this.processingInfo.find(info => info.index === this.processingNumber);
                    if (current_info) {
                        current_info.content = currentContent.trim();
                        onProcessingUpdate(this.processingInfo);
                    } else {
                        this.processingInfo.push({
                            index: this.processingNumber,
                            type: currentTag === 'thought' ? PROCESSING_TYPE.THOUGHT : PROCESSING_TYPE.ACTION,
                            content: currentContent.trim(),
                        });
                        onProcessingUpdate(this.processingInfo);
                    }
                }
            }
        }

        return fullResponse;
    }

    /**
     * Validates the assistant's response to ensure it conforms to the expected XML structure.
     * @param response The parsed XML response from the assistant.
     * @throws An error if the response does not meet the expected structure.
     */
    private validateAssistantResponse(response: { stage: { [key: string]: object | string } }) {
        if (!response.stage) {
            throw new Error('Response does not contain a <stage> element');
        }

        // Validate that the stage has the required attributes
        const stage = response.stage;
        if (!stage['@_number'] || !stage['@_role']) {
            throw new Error('Stage element must have "number" and "role" attributes');
        }

        // Extract the role of the stage to determine expected content
        const role = stage['@_role'];

        // Depending on the role, validate the presence of required elements
        if (role === 'assistant') {
            // Assistant's response should contain either 'thought', 'action', 'action_input', or 'answer'
            if (!('thought' in stage || 'action' in stage || 'action_input' in stage || 'answer' in stage)) {
                throw new Error('Assistant stage must contain a thought, action, action_input, or answer element');
            }

            // If 'thought' is present, validate it
            if ('thought' in stage) {
                if (typeof stage.thought !== 'string' || stage.thought.trim() === '') {
                    throw new Error('Thought must be a non-empty string');
                }
            }

            // If 'action' is present, validate it
            if ('action' in stage) {
                if (typeof stage.action !== 'string' || stage.action.trim() === '') {
                    throw new Error('Action must be a non-empty string');
                }

                // Optional: Check if the action is among allowed actions (including dynamic tools)
                const allowedActions = [...Object.keys(this.tools), ...Array.from(this.dynamicToolRegistry.keys())];
                if (!allowedActions.includes(stage.action)) {
                    throw new Error(`Action "${stage.action}" is not a valid tool`);
                }
            }

            // If 'action_input' is present, validate its structure
            if ('action_input' in stage) {
                const actionInput = stage.action_input as object;

                if (!('action_input_description' in actionInput) || typeof actionInput.action_input_description !== 'string') {
                    throw new Error('action_input must contain an action_input_description string');
                }

                if (!('inputs' in actionInput)) {
                    throw new Error('action_input must contain an inputs object');
                }

                // Further validation of inputs can be done here based on the expected parameters of the action
            }

            // If 'answer' is present, validate its structure
            if ('answer' in stage) {
                const answer = stage.answer as object;

                // Ensure answer contains at least one of the required elements
                if (!('grounded_text' in answer || 'normal_text' in answer)) {
                    throw new Error('Answer must contain grounded_text or normal_text');
                }

                // Validate follow_up_questions
                if (!('follow_up_questions' in answer)) {
                    throw new Error('Answer must contain follow_up_questions');
                }

                // Validate loop_summary
                if (!('loop_summary' in answer)) {
                    throw new Error('Answer must contain a loop_summary');
                }

                // Additional validation for citations, grounded_text, etc., can be added here
            }
        } else if (role === 'user') {
            // User's stage should contain 'query' or 'observation'
            if (!('query' in stage || 'observation' in stage)) {
                throw new Error('User stage must contain a query or observation element');
            }

            // Validate 'query' if present
            if ('query' in stage && typeof stage.query !== 'string') {
                throw new Error('Query must be a string');
            }

            // Validate 'observation' if present
            if ('observation' in stage) {
                // Ensure observation has the correct structure
                // This can be expanded based on how observations are structured
            }
        } else {
            throw new Error(`Unknown role "${role}" in stage`);
        }

        // Add any additional validation rules as necessary
    }

    /**
     * Helper function to check if a string can be parsed as an array of the expected type.
     * @param input The input string to check.
     * @param expectedType The expected type of the array elements ('string', 'number', or 'boolean').
     * @returns The parsed array if valid, otherwise throws an error.
     */
    private parseArray<T>(input: string, expectedType: 'string' | 'number' | 'boolean'): T[] {
        try {
            // Parse the input string into a JSON object
            const parsed = JSON.parse(input);

            // Check if the parsed object is an array and if all elements are of the expected type
            if (Array.isArray(parsed) && parsed.every(item => typeof item === expectedType)) {
                return parsed;
            } else {
                throw new Error(`Invalid ${expectedType} array format.`);
            }
        } catch (error) {
            throw new Error(`Failed to parse ${expectedType} array: ` + error);
        }
    }

    /**
     * Processes a specific action by invoking the appropriate tool with the provided inputs.
     * This method ensures that the action exists and validates the types of `actionInput`
     * based on the tool's parameter rules. It throws errors for missing required parameters
     * or mismatched types before safely executing the tool with the validated input.
     *
     * NOTE: In the future, it should typecheck for specific tool parameter types using the `TypeMap` or otherwise.
     *
     * Type validation includes checks for:
     * - `string`, `number`, `boolean`
     * - `string[]`, `number[]` (arrays of strings or numbers)
     *
     * @param action The action to perform. It corresponds to a registered tool.
     * @param actionInput The inputs for the action, passed as an object where each key is a parameter name.
     * @returns A promise that resolves to an array of `Observation` objects representing the result of the action.
     * @throws An error if the action is unknown, if required parameters are missing, or if input types don't match the expected parameter types.
     */
    private async processAction(action: string, actionInput: ParametersType<ReadonlyArray<Parameter>>): Promise<Observation[]> {
        // Check if the action exists in the tools list or dynamic registry
        if (!(action in this.tools) && !this.dynamicToolRegistry.has(action)) {
            throw new Error(`Unknown action: ${action}`);
        }
        console.log(actionInput);

        // Determine which tool to use - either from static tools or dynamic registry
        const tool = this.tools[action] || this.dynamicToolRegistry.get(action);

        // Special handling for documentMetadata tool with numeric or boolean fieldValue
        if (action === 'documentMetadata') {
            // Handle single field edit
            if ('fieldValue' in actionInput) {
                if (typeof actionInput.fieldValue === 'number' || typeof actionInput.fieldValue === 'boolean') {
                    // Convert number or boolean to string to pass validation
                    actionInput.fieldValue = String(actionInput.fieldValue);
                }
            }

            // Handle fieldEdits parameter (for multiple field edits)
            if ('fieldEdits' in actionInput && actionInput.fieldEdits) {
                try {
                    // If it's already an array, stringify it to ensure it passes validation
                    if (Array.isArray(actionInput.fieldEdits)) {
                        actionInput.fieldEdits = JSON.stringify(actionInput.fieldEdits);
                    }
                    // If it's an object but not an array, it might be a single edit - convert to array and stringify
                    else if (typeof actionInput.fieldEdits === 'object') {
                        actionInput.fieldEdits = JSON.stringify([actionInput.fieldEdits]);
                    }
                    // Otherwise, ensure it's a string for the validator
                    else if (typeof actionInput.fieldEdits !== 'string') {
                        actionInput.fieldEdits = String(actionInput.fieldEdits);
                    }
                } catch (error) {
                    console.error('Error processing fieldEdits:', error);
                    // Don't fail validation here, let the tool handle it
                }
            }
        }

        // Special handling for createNewTool with parsed XML toolCode
        if (action === 'createNewTool') {
            if ('toolCode' in actionInput && typeof actionInput.toolCode === 'object' && actionInput.toolCode !== null) {
                try {
                    // Convert the parsed XML object back to a string
                    const extractText = (obj: any): string => {
                        if (typeof obj === 'string') {
                            return obj;
                        } else if (obj && typeof obj === 'object') {
                            if (obj._text) {
                                return obj._text;
                            }
                            // Recursively extract text from all properties
                            let text = '';
                            for (const key in obj) {
                                if (key !== '_text') {
                                    const value = obj[key];
                                    if (typeof value === 'string') {
                                        text += value + '\n';
                                    } else if (value && typeof value === 'object') {
                                        text += extractText(value) + '\n';
                                    }
                                }
                            }
                            return text;
                        }
                        return '';
                    };

                    const reconstructedCode = extractText(actionInput.toolCode);
                    actionInput.toolCode = reconstructedCode;
                } catch (error) {
                    console.error('Error processing toolCode:', error);
                    // Convert to string as fallback
                    actionInput.toolCode = String(actionInput.toolCode);
                }
            }
        }

        // Check parameter requirements and types for the tool
        for (const param of tool.parameterRules) {
            // Check if the parameter is required and missing in the input
            if (param.required && !(param.name in actionInput) && !tool.inputValidator(actionInput)) {
                throw new Error(`Missing required parameter: ${param.name}`);
            }

            // Check if the parameter type matches the expected type
            const expectedType = param.type.replace('[]', '') as 'string' | 'number' | 'boolean';
            const isArray = param.type.endsWith('[]');
            const input = actionInput[param.name];

            if (isArray) {
                // Check if the input is a valid array of the expected type
                const parsedArray = this.parseArray(input as string, expectedType);
                actionInput[param.name] = parsedArray as TypeMap[typeof param.type];
            } else if (input !== undefined && typeof input !== expectedType) {
                throw new Error(`Invalid type for parameter ${param.name}: expected ${expectedType}`);
            }
        }

        // Execute the tool with the validated inputs
        return await tool.execute(actionInput);
    }

    /**
     * Gets a combined list of all tools, both static and dynamic
     * @returns An array of all available tool instances
     */
    private getAllTools(): BaseTool<ReadonlyArray<Parameter>>[] {
        // Combine static and dynamic tools
        return [...Object.values(this.tools), ...Array.from(this.dynamicToolRegistry.values())];
    }

    /**
     * Overridden method to get the React prompt with all tools (static + dynamic)
     */
    private getSystemPromptWithAllTools(): string {
        const allTools = this.getAllTools();
        const docSummaries = () => JSON.stringify(this._docManager.listDocs);
        const chatHistory = this._history();

        return getReactPrompt(allTools, docSummaries, chatHistory);
    }

    /**
     * Reinitializes the DocumentMetadataTool with a direct reference to the ChatBox instance.
     * This ensures that the tool can properly access the ChatBox document and find related documents.
     *
     * @param chatBox The ChatBox instance to pass to the DocumentMetadataTool
     */
    public reinitializeDocumentMetadataTool(): void {
        if (this.tools && this.tools.documentMetadata) {
            this.tools.documentMetadata = new DocumentMetadataTool(this._docManager);
            console.log('Agent: Reinitialized DocumentMetadataTool with ChatBox instance');
        } else {
            console.warn('Agent: Could not reinitialize DocumentMetadataTool - tool not found');
        }
    }
}

// Forward declaration to avoid circular import
interface AgentLike {
    registerDynamicTool(toolName: string, toolInstance: BaseTool<ReadonlyArray<Parameter>>): void;
    notifyToolCreated(toolName: string, completeToolCode: string): void;
}