const { query } = require('../database/db');

class FeedSackColumnConfig {
    static async get() {
        const result = await query('SELECT config FROM feed_sack_column_config ORDER BY id LIMIT 1');
        if (result.rows.length === 0) return null;
        return result.rows[0].config;
    }

    static async save(config) {
        // Check if a row exists
        const existing = await query('SELECT id FROM feed_sack_column_config LIMIT 1');
        if (existing.rows.length === 0) {
            // Insert
            const result = await query(
                'INSERT INTO feed_sack_column_config (config) VALUES ($1) RETURNING config',
                [JSON.stringify(config)]
            );
            return result.rows[0].config;
        } else {
            // Update the existing row
            const result = await query(
                'UPDATE feed_sack_column_config SET config = $1, updated_at = CURRENT_TIMESTAMP WHERE id = $2 RETURNING config',
                [JSON.stringify(config), existing.rows[0].id]
            );
            return result.rows[0].config;
        }
    }
}

module.exports = FeedSackColumnConfig;