#!/usr/bin/env node
/**
 * Re-seed Photo documents from existing uploads when Mongo data is lost.
 * - One doc per webp file on disk.
 * - Captions default to filename without suffix.
 * - Tags default to ['uncategorized'] unless a prefix is present.
 * - Variants NOT linked; each file is its own doc.
 *
 * Usage: node scripts/reseed_uploads.js
 * Make sure MONGO_URI is set (or uses default).
 */

const fs = require('fs');
const path = require('path');
const mongoose = require('mongoose');
const Photo = require('../models/photo');

const MONGO_URI = process.env.MONGO_URI || 'mongodb://localhost:27017/photogallery';
const UPLOAD_DIR = path.join(__dirname, '..', 'uploads');
const VARIANT_SUFFIXES = {
    '': 'main',
    '-md': 'medium',
    '-sm': 'thumb'
};

function parseFilename(file) {
    const ext = path.extname(file);
    const base = path.basename(file, ext);
    const matched = base.match(/(.+?)(-md|-sm)?$/);
    if (!matched) return { baseName: base, variant: 'main', ext };
    const baseName = matched[1];
    const variant = VARIANT_SUFFIXES[matched[2] || ''] || 'main';
    return { baseName, variant, ext };
}

async function main() {
    await mongoose.connect(MONGO_URI);
    console.log('Connected to Mongo:', MONGO_URI);

    const files = fs.readdirSync(UPLOAD_DIR).filter(f => f.toLowerCase().endsWith('.webp'));
    let created = 0;
    for (const file of files) {
        const existing = await Photo.findOne({ filename: file });
        if (existing) continue;
        const baseName = path.basename(file, path.extname(file));
        const caption = baseName.replace(/[-_]+/g, ' ');
        const tag = baseName.split('-')[1] || 'uncategorized';
        const doc = new Photo({
            filename: file,
            path: path.join('uploads', file),
            caption,
            tags: [tag],
        });
        await doc.save();
        created++;
    }

    console.log(`Seed complete. Created ${created} photo documents.`);
    await mongoose.disconnect();
}

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