import * as debug from '../util/debug'

import { authSession } from '../authSession/authSession'

import { createSolidLogic } from './solidLogic'

import { SolidLogic } from '../types'

const _fetch = async (url, requestInit) => {

const omitCreds = requestInit && requestInit.credentials && requestInit.credentials == 'omit'

if (authSession.info.webId && !omitCreds) { // see https://github.com/solidos/solidos/issues/114

// In fact fetch should respect credentials omit itself

return authSession.fetch(url, requestInit)

} else {

return window.fetch(url, requestInit)

}

}

// Global singleton pattern to ensure unique store across library versions

const SINGLETON_SYMBOL = Symbol.for('solid-logic-singleton')

// Type the global object properly with the singleton

interface GlobalWithSingleton {

[SINGLETON_SYMBOL]?: SolidLogic

}

const globalTarget = (typeof window !== 'undefined' ? window : global) as GlobalWithSingleton

function getOrCreateSingleton(): SolidLogic {

if (!globalTarget[SINGLETON_SYMBOL]) {

debug.log('SolidLogic: Creating new global singleton instance.')

globalTarget[SINGLETON_SYMBOL] = createSolidLogic({ fetch: _fetch }, authSession)

debug.log('Unique quadstore initialized.')

} else {

debug.log('SolidLogic: Using existing global singleton instance.')

}

return globalTarget[SINGLETON_SYMBOL]!

}

//this const makes solidLogicSingleton global accessible in mashlib

const solidLogicSingleton = getOrCreateSingleton()

export { solidLogicSingleton }