/**
 * Electric SQL client setup
 * This initializes the Electric SQL client with local PGlite database (PostgreSQL in browser)
 */

import { PGlite } from '@electric-sql/pglite'
import { electrify } from 'electric-sql/pglite'
import { getElectricAuthToken } from './auth'

// We'll generate the schema after running electric:generate
// For now, we'll use a placeholder type
type Electric = any
type Schema = any

let electric: Electric | null = null
let isInitializing = false
let initPromise: Promise<Electric> | null = null

export async function initElectric(): Promise<Electric> {
	if (electric) {
		return electric
	}

	if (isInitializing && initPromise) {
		return initPromise
	}

	isInitializing = true
	initPromise = (async () => {
		try {
			const config = {
				auth: {
					token: await getElectricAuthToken(),
				},
				url: process.env.NEXT_PUBLIC_ELECTRIC_URL || 'http://localhost:5133',
			}

			// Initialize PGlite database (PostgreSQL in browser)
			// Use idb:// prefix for IndexedDB storage in browser
			// relaxedDurability improves responsiveness by scheduling flush after query returns
			const conn = new PGlite('idb://surfsense.db', {
				relaxedDurability: true,
			})

			// Import schema (will be generated by electric:generate)
			// For now, we'll use a dynamic import that will work after schema generation
			let schema: Schema
			try {
				const schemaModule = await import('./generated/schema')
				schema = schemaModule.schema
			} catch (error) {
				console.warn(
					'Electric SQL schema not found. Run "pnpm electric:generate" to generate it.',
					error
				)
				// Return a mock electric client for now
				return null as any
			}

			// Electrify the PGlite database connection
			electric = await electrify(conn, schema, config)

			console.log('Electric SQL initialized successfully with PGlite')
			return electric
		} catch (error) {
			console.error('Failed to initialize Electric SQL:', error)
			throw error
		} finally {
			isInitializing = false
		}
	})()

	return initPromise
}

export function getElectric(): Electric {
	if (!electric) {
		throw new Error('Electric not initialized. Call initElectric() first.')
	}
	return electric
}

export function isElectricInitialized(): boolean {
	return electric !== null
}