#!/usr/bin/env node
/**
 * Report duplicate photos by filename/path and oversized base-name clusters.
 * Run: node scripts/find_duplicates.js
 */
const mongoose = require('mongoose');
const Photo = require('../models/photo');

const MONGO_URI = process.env.MONGO_URI || 'mongodb://localhost:27017/photogallery';

async function main() {
    await mongoose.connect(MONGO_URI);

    const byFilename = await Photo.aggregate([
        { $group: { _id: '$filename', ids: { $addToSet: '$_id' }, count: { $sum: 1 } } },
        { $match: { count: { $gt: 1 } } },
        { $project: { _id: 0, filename: '$_id', count: 1, ids: 1 } }
    ]);

    const byPath = await Photo.aggregate([
        { $group: { _id: '$path', ids: { $addToSet: '$_id' }, count: { $sum: 1 } } },
        { $match: { count: { $gt: 1 } } },
        { $project: { _id: 0, path: '$_id', count: 1, ids: 1 } }
    ]);

    const cluster = await Photo.aggregate([
        {
            $project: {
                base: { $regexFind: { input: '$filename', regex: /^(.*?)(-md|-sm)?\.webp$/ } },
                filename: 1
            }
        },
        {
            $group: {
                _id: '$base.captures.0',
                files: { $addToSet: '$filename' },
                ids: { $addToSet: '$_id' },
                count: { $sum: 1 }
            }
        },
        { $match: { count: { $gt: 3 } } },
        { $project: { _id: 0, base: '$_id', count: 1, files: 1, ids: 1 } }
    ]);

    console.log('Duplicates by filename:', JSON.stringify(byFilename, null, 2));
    console.log('Duplicates by path:', JSON.stringify(byPath, null, 2));
    console.log('Clusters (>3 variants):', JSON.stringify(cluster, null, 2));
    await mongoose.disconnect();
}

main().catch(err => {
    console.error(err);
    process.exit(1);
});