Code Completion

/**
 * Get code completions for Python code
 * @param request - Code completion request with code, line, and column
 * @returns Promise that resolves with completion suggestions
 */
getCodeCompletions(request: CodeCompletionRequest): Promise<CodeCompletionResponse>;

/**
 * Code completion request structure
 */
interface CodeCompletionRequest {
  /** Python code to analyze */
  code: string;
  /** Line number (0-based) where completion is requested */
  line: number;
  /** Column number (0-based) where completion is requested */
  column: number;
}

/**
 * Individual code completion suggestion
 */
interface CodeCompletion {
  /** Display label for the completion */
  label: string;
  /** Type of completion (function, class, variable, etc.) */
  type: string;
  /** Documentation string for the completion */
  docstring: string;
  /** Number of characters to replace from cursor position */
  completion_prefix_length: number;
}

/**
 * Array of completion suggestions
 */
type CodeCompletionResponse = CodeCompletion[];

import { WorkerProxy } from "@gradio/wasm";

const worker = new WorkerProxy({
  gradioWheelUrl: "https://example.com/gradio.whl",
  gradioClientWheelUrl: "https://example.com/gradio_client.whl",
  files: {},
  requirements: ["numpy", "pandas", "matplotlib"],
  sharedWorkerMode: false
});

worker.addEventListener("initialization-completed", async () => {
  // Basic code completion
  const completions = await worker.getCodeCompletions({
    code: "import numpy as np\nnp.",
    line: 1,
    column: 3
  });

  console.log("NumPy completions:");
  completions.forEach(completion => {
    console.log(`  ${completion.label} (${completion.type})`);
    if (completion.docstring) {
      console.log(`    ${completion.docstring.split('\n')[0]}`);
    }
  });

  // Method completion
  const methodCompletions = await worker.getCodeCompletions({
    code: `
import pandas as pd
df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]})
df.`,
    line: 2,
    column: 3
  });

  console.log("DataFrame method completions:");
  methodCompletions.slice(0, 10).forEach(completion => {
    console.log(`  ${completion.label} (${completion.type})`);
  });

  // Variable completion in context
  const contextCompletions = await worker.getCodeCompletions({
    code: `
def process_data(data_frame, column_name):
    result = data_frame[column_name].mean()
    data_`,
    line: 2,
    column: 9
  });

  console.log("Context-aware completions:");
  contextCompletions.forEach(completion => {
    console.log(`  ${completion.label} (${completion.type})`);
  });
});

import { WorkerProxy } from "@gradio/wasm";

class PythonCodeEditor {
  private worker: WorkerProxy;
  private editorElement: HTMLTextAreaElement;
  private completionsList: HTMLDivElement;
  private currentCompletions: CodeCompletion[] = [];

  constructor(editorElement: HTMLTextAreaElement, worker: WorkerProxy) {
    this.worker = worker;
    this.editorElement = editorElement;
    this.setupEditor();
    this.createCompletionsUI();
  }

  private setupEditor() {
    // Set up event listeners for code completion
    this.editorElement.addEventListener('input', () => {
      this.debounceCompletion();
    });

    this.editorElement.addEventListener('keydown', (event) => {
      this.handleKeyDown(event);
    });

    // Position cursor tracking
    this.editorElement.addEventListener('click', () => {
      this.hideCompletions();
    });
  }

  private createCompletionsUI() {
    this.completionsList = document.createElement('div');
    this.completionsList.className = 'completions-list';
    this.completionsList.style.cssText = `
      position: absolute;
      background: white;
      border: 1px solid #ccc;
      border-radius: 4px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
      max-height: 200px;
      overflow-y: auto;
      z-index: 1000;
      display: none;
    `;
    document.body.appendChild(this.completionsList);
  }

  private debounceCompletion = this.debounce(async () => {
    await this.triggerCompletion();
  }, 300);

  private debounce(func: Function, wait: number) {
    let timeout: NodeJS.Timeout;
    return function executedFunction(...args: any[]) {
      const later = () => {
        clearTimeout(timeout);
        func(...args);
      };
      clearTimeout(timeout);
      timeout = setTimeout(later, wait);
    };
  }

  private async triggerCompletion() {
    const cursorPosition = this.getCursorPosition();
    const code = this.editorElement.value;

    try {
      const completions = await this.worker.getCodeCompletions({
        code: code,
        line: cursorPosition.line,
        column: cursorPosition.column
      });

      if (completions.length > 0) {
        this.showCompletions(completions, cursorPosition);
      } else {
        this.hideCompletions();
      }
    } catch (error) {
      console.error("Code completion error:", error);
      this.hideCompletions();
    }
  }

  private getCursorPosition(): { line: number; column: number } {
    const textBeforeCursor = this.editorElement.value.substring(0, this.editorElement.selectionStart);
    const lines = textBeforeCursor.split('\n');
    
    return {
      line: lines.length - 1,
      column: lines[lines.length - 1].length
    };
  }

  private showCompletions(completions: CodeCompletion[], cursorPosition: { line: number; column: number }) {
    this.currentCompletions = completions;
    
    // Clear previous completions
    this.completionsList.innerHTML = '';

    // Add completion items
    completions.slice(0, 10).forEach((completion, index) => {
      const item = document.createElement('div');
      item.className = 'completion-item';
      item.style.cssText = `
        padding: 8px 12px;
        cursor: pointer;
        border-bottom: 1px solid #eee;
        font-family: monospace;
      `;

      const typeColor = this.getCompletionTypeColor(completion.type);
      item.innerHTML = `
        <div style="display: flex; justify-content: space-between; align-items: center;">
          <span style="font-weight: bold;">${completion.label}</span>
          <span style="font-size: 0.8em; color: ${typeColor};">${completion.type}</span>
        </div>
        ${completion.docstring ? `<div style="font-size: 0.8em; color: #666; margin-top: 4px;">${completion.docstring.split('\n')[0]}</div>` : ''}
      `;

      item.addEventListener('click', () => {
        this.insertCompletion(completion);
      });

      item.addEventListener('mouseenter', () => {
        item.style.backgroundColor = '#f0f0f0';
      });

      item.addEventListener('mouseleave', () => {
        item.style.backgroundColor = 'white';
      });

      this.completionsList.appendChild(item);
    });

    // Position the completions list
    this.positionCompletionsList();
    this.completionsList.style.display = 'block';
  }

  private getCompletionTypeColor(type: string): string {
    const colors = {
      'function': '#0066cc',
      'method': '#0066cc',
      'class': '#cc6600',
      'variable': '#009900',
      'module': '#990099',
      'keyword': '#cc0000'
    };
    return colors[type] || '#666666';
  }

  private positionCompletionsList() {
    const editorRect = this.editorElement.getBoundingClientRect();
    const cursorPosition = this.getCursorPosition();
    
    // Approximate cursor position (this would need more sophisticated calculation in practice)
    const lineHeight = 20;
    const charWidth = 8;
    
    this.completionsList.style.left = `${editorRect.left + cursorPosition.column * charWidth}px`;
    this.completionsList.style.top = `${editorRect.top + (cursorPosition.line + 1) * lineHeight}px`;
  }

  private insertCompletion(completion: CodeCompletion) {
    const cursorPos = this.editorElement.selectionStart;
    const textBefore = this.editorElement.value.substring(0, cursorPos - completion.completion_prefix_length);
    const textAfter = this.editorElement.value.substring(cursorPos);
    
    this.editorElement.value = textBefore + completion.label + textAfter;
    this.editorElement.selectionStart = this.editorElement.selectionEnd = textBefore.length + completion.label.length;
    
    this.hideCompletions();
    this.editorElement.focus();
  }

  private handleKeyDown(event: KeyboardEvent) {
    if (this.completionsList.style.display === 'block') {
      switch (event.key) {
        case 'Escape':
          event.preventDefault();
          this.hideCompletions();
          break;
        case 'Tab':
        case 'Enter':
          event.preventDefault();
          if (this.currentCompletions.length > 0) {
            this.insertCompletion(this.currentCompletions[0]);
          }
          break;
      }
    }
  }

  private hideCompletions() {
    this.completionsList.style.display = 'none';
    this.currentCompletions = [];
  }
}

// Usage
const editorElement = document.getElementById('python-editor') as HTMLTextAreaElement;
const codeEditor = new PythonCodeEditor(editorElement, worker);

import { WorkerProxy } from "@gradio/wasm";

class AdvancedCodeCompletion {
  private worker: WorkerProxy;
  private completionCache: Map<string, { completions: CodeCompletion[]; timestamp: number }> = new Map();
  private cacheTimeout = 60000; // 1 minute cache

  constructor(worker: WorkerProxy) {
    this.worker = worker;
  }

  async getContextualCompletions(
    code: string, 
    line: number, 
    column: number,
    options: {
      includePrivate?: boolean;
      includeBuiltins?: boolean;
      maxCompletions?: number;
      prioritizeByType?: string[];
    } = {}
  ): Promise<CodeCompletion[]> {
    
    const cacheKey = `${code.substring(0, 1000)}:${line}:${column}`;
    const cached = this.completionCache.get(cacheKey);
    
    if (cached && Date.now() - cached.timestamp < this.cacheTimeout) {
      console.log("Using cached completions");
      return this.filterAndSortCompletions(cached.completions, options);
    }

    try {
      const completions = await this.worker.getCodeCompletions({
        code,
        line,
        column
      });

      // Cache the results
      this.completionCache.set(cacheKey, {
        completions,
        timestamp: Date.now()
      });

      return this.filterAndSortCompletions(completions, options);
    } catch (error) {
      console.error("Code completion failed:", error);
      return [];
    }
  }

  private filterAndSortCompletions(
    completions: CodeCompletion[], 
    options: {
      includePrivate?: boolean;
      includeBuiltins?: boolean;
      maxCompletions?: number;
      prioritizeByType?: string[];
    }
  ): CodeCompletion[] {
    
    let filtered = completions;

    // Filter private members
    if (!options.includePrivate) {
      filtered = filtered.filter(comp => !comp.label.startsWith('_'));
    }

    // Filter builtins
    if (!options.includeBuiltins) {
      filtered = filtered.filter(comp => comp.type !== 'builtin');
    }

    // Sort by priority types
    if (options.prioritizeByType && options.prioritizeByType.length > 0) {
      filtered.sort((a, b) => {
        const aPriority = options.prioritizeByType!.indexOf(a.type);
        const bPriority = options.prioritizeByType!.indexOf(b.type);
        
        if (aPriority !== -1 && bPriority !== -1) {
          return aPriority - bPriority;
        } else if (aPriority !== -1) {
          return -1;
        } else if (bPriority !== -1) {
          return 1;
        } else {
          return a.label.localeCompare(b.label);
        }
      });
    } else {
      // Default sorting by label
      filtered.sort((a, b) => a.label.localeCompare(b.label));
    }

    // Limit results
    if (options.maxCompletions && options.maxCompletions > 0) {
      filtered = filtered.slice(0, options.maxCompletions);
    }

    return filtered;
  }

  async getSignatureHelp(code: string, line: number, column: number): Promise<{
    signatures: Array<{
      label: string;
      documentation: string;
      parameters: Array<{
        label: string;
        documentation: string;
      }>;
    }>;
    activeSignature: number;
    activeParameter: number;
  } | null> {
    
    // This would require additional implementation in the worker
    // For now, we'll simulate signature help using completions
    try {
      await this.worker.runPythonCode(`
# Enhanced code analysis for signature help
import ast
import inspect
import sys

code_to_analyze = '''${code.replace(/'/g, "\\'")}'''
target_line = ${line}
target_column = ${column}

# This would need sophisticated AST analysis
# For now, we'll return a placeholder
print("SIGNATURE_HELP: Not implemented")
`);

      return null; // Placeholder
    } catch (error) {
      console.error("Signature help failed:", error);
      return null;
    }
  }

  async getHoverInformation(code: string, line: number, column: number): Promise<{
    content: string;
    range: { start: { line: number; column: number }; end: { line: number; column: number } };
  } | null> {
    
    try {
      // Get completions at the current position
      const completions = await this.worker.getCodeCompletions({
        code,
        line,
        column
      });

      // Find the most relevant completion
      const currentWord = this.getCurrentWord(code, line, column);
      const matchingCompletion = completions.find(comp => 
        comp.label === currentWord || comp.label.startsWith(currentWord)
      );

      if (matchingCompletion && matchingCompletion.docstring) {
        return {
          content: `**${matchingCompletion.label}** (${matchingCompletion.type})\n\n${matchingCompletion.docstring}`,
          range: {
            start: { line, column: column - currentWord.length },
            end: { line, column }
          }
        };
      }

      return null;
    } catch (error) {
      console.error("Hover information failed:", error);
      return null;
    }
  }

  private getCurrentWord(code: string, line: number, column: number): string {
    const lines = code.split('\n');
    if (line >= lines.length) return '';
    
    const currentLine = lines[line];
    const beforeCursor = currentLine.substring(0, column);
    const afterCursor = currentLine.substring(column);
    
    // Find word boundaries
    const wordBefore = beforeCursor.match(/[a-zA-Z_][a-zA-Z0-9_]*$/);
    const wordAfter = afterCursor.match(/^[a-zA-Z0-9_]*/);
    
    return (wordBefore ? wordBefore[0] : '') + (wordAfter ? wordAfter[0] : '');
  }

  clearCache(): void {
    this.completionCache.clear();
  }

  getCacheStats(): { size: number; entries: string[] } {
    return {
      size: this.completionCache.size,
      entries: Array.from(this.completionCache.keys())
    };
  }
}

// Usage
const advancedCompletion = new AdvancedCodeCompletion(worker);

// Get filtered completions
const completions = await advancedCompletion.getContextualCompletions(
  "import pandas as pd\ndf = pd.DataFrame()\ndf.",
  2,
  3,
  {
    includePrivate: false,
    maxCompletions: 20,
    prioritizeByType: ['method', 'function', 'property']
  }
);

// Get hover information
const hoverInfo = await advancedCompletion.getHoverInformation(
  "import numpy as np\nnp.array",
  1,
  8
);

if (hoverInfo) {
  console.log("Hover info:", hoverInfo.content);
}