/**
 * Agent Integration Example
 *
 * Shows how a Venus agent can use the discovery module to:
 * 1. Verify it's running in a Venus project
 * 2. Discover available personalities/identities
 * 3. Load context based on selected personality
 *
 * This demonstrates the typical flow for a personality-aware agent.
 */

import {
  getVenusRoot,
  isInsideVenusProject,
  discoverContextTypesBySubcategory,
  getContextTypeByName,
} from '../src/index.js';
import { readFileSync, readdirSync } from 'fs';
import { join } from 'path';

/**
 * Agent personality configuration
 */
interface AgentPersonality {
  name: string;
  contextPath: string;
  documentCount: number;
  availableDocuments: string[];
}

/**
 * Discover available agent personalities
 */
async function discoverPersonalities(): Promise<AgentPersonality[]> {
  // Get all real-people identities (actual personalities)
  const realPeople = await discoverContextTypesBySubcategory('real-people');

  // Also include fictional characters if they can be agent personalities
  const characters = await discoverContextTypesBySubcategory(
    'fictional-characters'
  );

  // Also business personas
  const personas = await discoverContextTypesBySubcategory('business-personas');

  const allIdentities = [...realPeople, ...characters, ...personas];

  return allIdentities.map((identity) => ({
    name: identity.name,
    contextPath: identity.basePath,
    documentCount: identity.documentCount,
    availableDocuments: findMarkdownFiles(identity.basePath),
  }));
}

/**
 * Find all markdown files in a directory
 */
function findMarkdownFiles(dirPath: string): string[] {
  try {
    const files = readdirSync(dirPath, { withFileTypes: true });
    return files
      .filter((f) => f.isFile() && f.name.endsWith('.md'))
      .map((f) => f.name)
      .sort();
  } catch {
    return [];
  }
}

/**
 * Load context for a specific personality
 */
async function loadPersonalityContext(
  personalityName: string
): Promise<string> {
  const context = await getContextTypeByName(personalityName);

  if (!context) {
    throw new Error(`Personality not found: ${personalityName}`);
  }

  console.log(`Loading context for: ${personalityName}`);
  console.log(`  Category: ${context.category} (${context.subcategory})`);
  console.log(`  Path: ${context.relativePath}`);
  console.log(`  Documents: ${context.documentCount}`);
  console.log();

  // Find all markdown files
  const files = findMarkdownFiles(context.basePath);

  if (files.length === 0) {
    return 'No context documents found.';
  }

  // Load and concatenate all markdown files
  const documents: string[] = [];

  for (const file of files) {
    const filePath = join(context.basePath, file);
    try {
      const content = readFileSync(filePath, 'utf-8');
      documents.push(`## ${file}\n\n${content}`);
    } catch (error) {
      console.warn(`  Warning: Could not read ${file}`);
    }
  }

  return documents.join('\n\n---\n\n');
}

/**
 * Main agent initialization flow
 */
async function main() {
  console.log('='.repeat(60));
  console.log('Venus Agent - Personality Discovery Example');
  console.log('='.repeat(60));
  console.log();

  // Step 1: Verify we're in a Venus project
  if (!isInsideVenusProject()) {
    console.error('ERROR: Not running in a Venus project!');
    console.error('Cannot initialize agent without Venus context.');
    process.exit(1);
  }

  const venusRoot = getVenusRoot();
  console.log('Venus project root:', venusRoot);
  console.log();

  // Step 2: Discover available personalities
  console.log('Discovering available personalities...');
  const personalities = await discoverPersonalities();

  console.log(`Found ${personalities.length} personalities:\n`);
  for (const p of personalities) {
    console.log(`  ${p.name}`);
    console.log(`    Documents: ${p.documentCount}`);
    console.log(`    Files: ${p.availableDocuments.join(', ')}`);
    console.log();
  }

  // Step 3: Select a personality (in a real agent, this would come from user input)
  const selectedPersonality = personalities[0]?.name;

  if (!selectedPersonality) {
    console.log('No personalities available.');
    return;
  }

  console.log('='.repeat(60));
  console.log(`Loading personality: ${selectedPersonality}`);
  console.log('='.repeat(60));
  console.log();

  // Step 4: Load personality context
  const contextContent = await loadPersonalityContext(selectedPersonality);

  console.log('Context loaded successfully!');
  console.log();
  console.log('Context preview (first 500 chars):');
  console.log('-'.repeat(60));
  console.log(contextContent.substring(0, 500) + '...');
  console.log('-'.repeat(60));
  console.log();

  console.log('Agent initialized with personality:', selectedPersonality);
  console.log('Total context length:', contextContent.length, 'characters');
}

main().catch((error) => {
  console.error('Error:', error);
  process.exit(1);
});