import {type Static, type TObject, type TProperties} from '@sinclair/typebox'
import {Value} from '@sinclair/typebox/value'
import logger from 'log'

import {read_object} from './src/read_type'

const log = logger('config')
export {Type} from '@sinclair/typebox' // Re-export Type so users can describe config

export async function parse<T extends TProperties>(scheme: TObject<T>): Promise<Static<TObject<T>> | null> {
    log.info("Parse configuration from env")

    log.debug("Read configuration from env")
    const config = await read_object(scheme)
    if (!config.ok) return null

    // This check is kind of a duplicate, is it useful ?
    log.debug("Validate config against scheme")
    const config_parsed = Value.Check(scheme, config.data)
    if (config_parsed) {
        log.trace("Config is valid")
        return config.data
    } else {
        log.warn("Invalid config, check failed")
        return null
    }
}