import * as path from "path"
import * as fs from "fs"
import { staticPath } from "./constants.js"
import { flavors, variety } from "./constants.js"
import { getYaoi } from "./scraper.js"

export async function middleware(req, res, next) {
    var filePath = (req.baseUrl + req.path).trim()

    if (!filePath.includes(".")) {
        if (filePath.charAt(filePath.length - 1) != '/') {
            res.redirect(filePath + '/')
            return
        }
        filePath = path.join(filePath, '/index.html')
    }

    filePath = path.join(staticPath, filePath || 'index.html')
    if (fs.existsSync(filePath) && filePath.includes(".html")) {
        var data = fs.readFileSync(filePath).toString()

        res.contentType(path.basename(filePath))

        data = await converter(data)

        res.send(data)
    }
    else {
        next()
    }

}

export async function converter(html) {
    var replacers = {
        "FLAVOR_COUNT": flavors.length,
        "VARIETY": variety,
        "FLAVORS": flavors.join(", ").replace(/,(?=[^,]+$)/, ' &'),
        "SPIN_BUTTON": `<a href="/spin" id="yaoiButton"><div>S</div><div>P</div><div>I</div><div>N</div></a>`,
        "YAOI": () => {
            var yaoi = getYaoi()

            if (yaoi) {
                return `<div class="post">${yaoi.html}</div>`
            }
        }
    }

    for (var key in replacers) {
        html = html.replaceAll(`{${key}}`, replacers[key])
    }

    return html
}