const express = require("express")
const router = express.Router({ mergeParams: true })
const path = require("node:path")
const fs = require("node:fs")
const { DefaultError } = require("../../../errors/errors")

const TEXTURES_DIR = path.join(process.cwd(), "data", "textures")

router.get("/", async (req, res, next) => {
    try {
        const hash = req.params.hash
        if (!/^[a-f0-9]{64}$/i.test(hash)) {
            throw new DefaultError(404, "Texture not found")
        }

        const subDir = hash.substring(0, 2)
        const filePath = path.join(TEXTURES_DIR, subDir, hash)
        if (!fs.existsSync(filePath)) {
            throw new DefaultError(404, "Texture not found")
        }
        res.sendFile(filePath)
    } catch (err) {
        return next(err)
    }
})

module.exports = router