#!/usr/bin/env bun
/**
 * Profile Management System
 *
 * Manages numerology profiles stored in ~/.numerology/profiles/
 * Each profile contains name and birthdate for easy reuse across all tools.
 *
 * Usage:
 *   import { loadProfile, saveProfile, listProfiles, deleteProfile } from './profile-manager';
 */

import { existsSync, mkdirSync, readdirSync, readFileSync, writeFileSync, unlinkSync } from 'fs';
import { join } from 'path';
import { homedir } from 'os';

export interface Profile {
  name: string;
  birthdate: string;
  created: string;
  updated: string;
}

const PROFILES_DIR = join(homedir(), '.numerology', 'profiles');

/**
 * Ensure profiles directory exists
 */
function ensureProfilesDir(): void {
  if (!existsSync(PROFILES_DIR)) {
    mkdirSync(PROFILES_DIR, { recursive: true });
  }
}

/**
 * Generate profile filename from identifier
 */
function getProfilePath(identifier: string): string {
  // Sanitize identifier to create safe filename
  const safeName = identifier.toLowerCase().replace(/[^a-z0-9-_]/g, '-');
  return join(PROFILES_DIR, `${safeName}.json`);
}

/**
 * Save a profile
 */
export function saveProfile(identifier: string, name: string, birthdate: string): void {
  ensureProfilesDir();

  const profilePath = getProfilePath(identifier);
  const now = new Date().toISOString();

  // Check if profile exists to preserve created date
  let created = now;
  if (existsSync(profilePath)) {
    try {
      const existing = JSON.parse(readFileSync(profilePath, 'utf-8')) as Profile;
      created = existing.created;
    } catch {
      // If file is corrupted, use current time
    }
  }

  const profile: Profile = {
    name,
    birthdate,
    created,
    updated: now
  };

  writeFileSync(profilePath, JSON.stringify(profile, null, 2));
}

/**
 * Load a profile
 */
export function loadProfile(identifier: string): Profile | null {
  const profilePath = getProfilePath(identifier);

  if (!existsSync(profilePath)) {
    return null;
  }

  try {
    const data = readFileSync(profilePath, 'utf-8');
    return JSON.parse(data) as Profile;
  } catch (error) {
    console.error(`Error reading profile '${identifier}':`, error);
    return null;
  }
}

/**
 * List all profiles
 */
export function listProfiles(): Array<{ identifier: string; profile: Profile }> {
  ensureProfilesDir();

  const profiles: Array<{ identifier: string; profile: Profile }> = [];

  try {
    const files = readdirSync(PROFILES_DIR);

    for (const file of files) {
      if (file.endsWith('.json')) {
        const identifier = file.replace('.json', '');
        const profile = loadProfile(identifier);

        if (profile) {
          profiles.push({ identifier, profile });
        }
      }
    }
  } catch (error) {
    console.error('Error listing profiles:', error);
  }

  return profiles;
}

/**
 * Delete a profile
 */
export function deleteProfile(identifier: string): boolean {
  const profilePath = getProfilePath(identifier);

  if (!existsSync(profilePath)) {
    return false;
  }

  try {
    unlinkSync(profilePath);
    return true;
  } catch (error) {
    console.error(`Error deleting profile '${identifier}':`, error);
    return false;
  }
}

/**
 * Check if a profile exists
 */
export function profileExists(identifier: string): boolean {
  return existsSync(getProfilePath(identifier));
}

/**
 * Get profile identifier from name (for auto-generation)
 */
export function generateIdentifier(name: string): string {
  // Generate identifier from first name
  const firstName = name.split(' ')[0];
  return firstName.toLowerCase().replace(/[^a-z0-9]/g, '');
}