/**
 * API Route: Register an anonymous plant
 * POST /api/plants/register-anonymous
 *
 * This endpoint allows for privacy-preserving plant registration
 */

import type { NextApiRequest, NextApiResponse } from 'next';
import { getBlockchain, saveBlockchain } from '../../../lib/blockchain/manager';
import { PlantData } from '../../../lib/blockchain/types';
import {
  generateAnonymousId,
  generateWalletAddress,
  obfuscateLocation,
  generateAnonymousPlantName,
  createAnonymousContact,
  PrivacySettings,
} from '../../../lib/privacy/anonymity';
import { getTorService } from '../../../lib/services/tor';

interface AnonymousPlantRequest {
  commonName: string;
  scientificName?: string;
  species?: string;
  genus?: string;
  family?: string;
  location: {
    latitude: number;
    longitude: number;
  };
  privacySettings: PrivacySettings;
  pseudonym?: string;
  encryptionKey?: string;
}

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse
) {
  if (req.method !== 'POST') {
    return res.status(405).json({ error: 'Method not allowed' });
  }

  try {
    const requestData: AnonymousPlantRequest = req.body;

    // Validate required fields
    if (!requestData.commonName || !requestData.location || !requestData.privacySettings) {
      return res.status(400).json({
        error: 'Missing required fields: commonName, location, privacySettings',
      });
    }

    const { location, privacySettings } = requestData;

    // Check if request came through Tor
    const torService = getTorService();
    const isTorConnection = torService.isRequestFromTor(req.headers);

    // Generate anonymous identifiers
    const anonymousUserId = generateAnonymousId();
    const walletAddress = generateWalletAddress();
    const plantId = `plant-${generateAnonymousId()}`;

    // Obfuscate location based on privacy settings
    const fuzzyLocation = obfuscateLocation(
      location.latitude,
      location.longitude,
      privacySettings.locationPrivacy
    );

    // Determine display name based on privacy settings
    let displayName: string;
    if (privacySettings.identityPrivacy === 'anonymous') {
      displayName = 'Anonymous Grower';
    } else if (privacySettings.identityPrivacy === 'pseudonym' && requestData.pseudonym) {
      displayName = requestData.pseudonym;
    } else {
      displayName = `Grower-${anonymousUserId.substring(0, 8)}`;
    }

    // Create anonymous contact
    const anonymousEmail = createAnonymousContact(
      anonymousUserId,
      requestData.encryptionKey || 'default-key'
    );

    // Build plant data with privacy protections
    const plantData: PlantData = {
      id: plantId,
      commonName: privacySettings.sharePlantDetails
        ? requestData.commonName
        : generateAnonymousPlantName(requestData.commonName, 0),
      scientificName: privacySettings.sharePlantDetails ? requestData.scientificName : undefined,
      species: privacySettings.sharePlantDetails ? requestData.species : undefined,
      genus: privacySettings.sharePlantDetails ? requestData.genus : undefined,
      family: privacySettings.sharePlantDetails ? requestData.family : undefined,
      propagationType: 'original',
      generation: 0,
      plantedDate: new Date().toISOString(),
      status: 'growing',
      location: {
        latitude: fuzzyLocation.latitude,
        longitude: fuzzyLocation.longitude,
        address: fuzzyLocation.displayName,
        city: privacySettings.locationPrivacy !== 'hidden' ? 'Privacy Protected' : undefined,
        country: privacySettings.locationPrivacy === 'country' ? 'Anonymous Region' : undefined,
      },
      owner: {
        id: anonymousUserId,
        name: displayName,
        email: anonymousEmail,
        walletAddress: walletAddress,
      },
      childPlants: [],
      registeredAt: new Date().toISOString(),
      updatedAt: new Date().toISOString(),
      notes: privacySettings.anonymousMode
        ? 'Registered anonymously via privacy mode'
        : undefined,
    };

    const blockchain = getBlockchain();

    // Register the plant
    const block = blockchain.registerPlant(plantData);

    // Save blockchain
    saveBlockchain();

    // Prepare response with privacy info
    res.status(201).json({
      success: true,
      plant: block.plant,
      privacy: {
        anonymousId: anonymousUserId,
        walletAddress: walletAddress,
        locationAccuracy: fuzzyLocation.accuracy,
        torConnection: isTorConnection,
        privacyLevel: privacySettings.locationPrivacy,
      },
      block: {
        index: block.index,
        hash: block.hash,
        timestamp: block.timestamp,
      },
      message: 'Plant registered anonymously',
      warning: !isTorConnection
        ? 'For maximum privacy, consider accessing through Tor network'
        : null,
    });
  } catch (error: any) {
    console.error('Error registering anonymous plant:', error);
    res.status(500).json({ error: error.message || 'Internal server error' });
  }
}