/**
 * API Route: Find plants with similar growing environments
 * GET /api/environment/similar?plantId=xyz&minScore=70
 */

import type { NextApiRequest, NextApiResponse } from 'next';
import { getBlockchain } from '../../../lib/blockchain/manager';
import { findSimilarEnvironments } from '../../../lib/environment/analysis';

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

  try {
    const { plantId, minScore } = req.query;

    if (!plantId || typeof plantId !== 'string') {
      return res.status(400).json({ error: 'Missing plantId parameter' });
    }

    const blockchain = getBlockchain();
    const targetPlant = blockchain.getPlant(plantId);

    if (!targetPlant) {
      return res.status(404).json({ error: 'Plant not found' });
    }

    if (!targetPlant.environment) {
      return res.status(400).json({
        error: 'Plant has no environmental data',
        message: 'Add environmental information to find similar plants',
      });
    }

    // Get all plants
    const allPlants = Array.from(
      new Set(blockchain.chain.map(block => block.plant.id))
    )
      .map(id => blockchain.getPlant(id)!)
      .filter(Boolean);

    const minScoreValue = minScore ? parseInt(minScore as string) : 70;
    const similarPlants = findSimilarEnvironments(targetPlant, allPlants, minScoreValue);

    res.status(200).json({
      success: true,
      targetPlant: {
        id: targetPlant.id,
        commonName: targetPlant.commonName,
        scientificName: targetPlant.scientificName,
      },
      similarCount: similarPlants.length,
      similar: similarPlants.map(({ plant, comparison }) => ({
        plant: {
          id: plant.id,
          commonName: plant.commonName,
          scientificName: plant.scientificName,
          owner: plant.owner.name,
          location: plant.location.city || plant.location.country,
        },
        similarityScore: comparison.score,
        similarities: comparison.similarities,
        differences: comparison.differences,
      })),
    });
  } catch (error: any) {
    console.error('Error finding similar environments:', error);
    res.status(500).json({ error: error.message || 'Internal server error' });
  }
}