import Handlebars from 'handlebars'

import debugModule from '../debug.mjs'

import { processFile, readFile, writeFile } from './fs-utils.mjs'

const debug = debugModule.errors

export async function compileTemplate (filePath) {

const indexTemplateSource = readFile(filePath)

return Handlebars.compile(indexTemplateSource)

}

export async function processHandlebarFile (filePath, substitutions) {

return processFile(filePath, (rawSource) => processHandlebarTemplate(rawSource, substitutions))

}

function processHandlebarTemplate (source, substitutions) {

try {

const template = Handlebars.compile(source)

return template(substitutions)

} catch (error) {

debug(`Error processing template: ${error}`)

return source

}

}

export function writeTemplate (filePath, template, substitutions) {

const source = template(substitutions)

writeFile(filePath, source)

}