/**
 * Schema Loader Utility
 * कार्य: Dataset metadata fetch & validation
 */
class SchemaLoader {
    constructor() {
        this.schemaUrl = 'https://huggingface.co/datasets/kalpesh77/vedic-neural-geometry/resolve/main/SCHEMA.json';
        this.schema = null;
        this.isLoaded = false;
    }

    async load() {
        if (this.isLoaded) return this.schema;
        
        try {
            console.log('📥 SCHEMA.json fetch सुरू...');
            const response = await fetch(this.schemaUrl);
            if (!response.ok) throw new Error(`HTTP ${response.status}: Schema fetch failed`);
            
            this.schema = await response.json();
            this.isLoaded = true;
            console.log('✅ SCHEMA.json यशस्वी लोड');
            return this.schema;
        } catch (error) {
            console.error('❌ Schema Loader त्रुटी:', error);
            throw error;
        }
    }

    getCoordinateConfig() {
        if (!this.isLoaded) throw new Error('Schema अजून लोड झालेले नाही');
        
        const nodeSchema = this.schema.canonical.nodes.columns;
        return {
            xColumn: 'x',
            yColumn: 'y',
            sourceRange: { min: 0, max: 1000 },
            targetRange: { min: 0, max: 100 },
            scaleFactor: 0.1, // 100 / 1000
            typeColumn: 'type',
            idColumn: 'node_id'
        };
    }
}

window.VedicSchemaLoader = new SchemaLoader();