import { join, relative, ensureFileSync, wait, S3 } from "../deps.ts";
import Pika from "../utils/instances/pika.ts";

const ROUTES_FILE = "routes.ts";

const S3inner = wait({
    text: `Generating ${ROUTES_FILE}...`,
    spinner: "aesthetic"
})

interface PageRoute {
    name: string;
    path: string;
    route: string;
}

async function readDir(dir: URL): Promise<PageRoute[]> {
    // Sort the Entries
    const entries = [...Deno.readDirSync(dir)]
    entries.sort((a, b) => a.name.toUpperCase() < b.name.toUpperCase() ? -1 : 1);
    const routes: PageRoute[] = []

    for (const file of entries) {
        const path = join(dir.pathname, file.name)
        if (file.isDirectory) {
            const sub = await readDir(new URL(path, import.meta.url))
            routes.push(...sub)
            continue;
        }

        const relativePath = relative(
            new URL(import.meta.url + "/..").pathname,
            path
        )

        const route = "/" + relativePath.replaceAll(
            /\[(.*?)\]/g,
            "{$1}",
        ).replace(/(\.ts)|(\.js)|(\/index(\.ts|\.js))/, "")
            .replace(/[\\/]+/g, '/')

        const filePath = `../${relativePath}`;
        const replaced = route.replace("/../src/routes", "")
        let finalRoute = replaced;
        if (replaced.includes('index') && !replaced.startsWith("/index"))
            finalRoute = replaced.replace("/index", "")
        else
            finalRoute = replaced.replace('/index', '/')

        S3inner.text = `Added ${finalRoute}`

        routes.push({
            name: Pika.gen("route"),
            route: finalRoute,
            path: filePath,
        });
    }

    return routes;
}


function createFile(routes: PageRoute[]): string {
    let string =
        `// This File is generated by scripts/routes.ts
// Do not edit this File manually
// run \`vr routes\` to regenerate this File

import PageRoute from "../../utils/types/PageRoute.ts"
${routes.map((route) => (
            `import ${route.name} from "${route.path.replace(/[\\/]+/g, '/')}";`).replace('./../src', ".")).join("\n")}

const routes: PageRoute[] = [\n    ${routes.map((route) => (`{ route: "${route.route}", method: ${route.name}.method, handler: ${route.name}.handler, domains: ${route.name}.domains || undefined }`)).join(",\n    ")}
]


export default routes
    `

    return string
}


async function write(folderwithroutes: string | URL, file: string | URL) {
    if (typeof folderwithroutes === "string") folderwithroutes = new URL(folderwithroutes, import.meta.url);
    // console.log(folderwithroutes)
    const routes = await readDir(folderwithroutes)
    const content = createFile(routes)

    await Deno.writeTextFile(`./src/generated/${file}`, content)
}


if (import.meta.main) {

    try {
        ensureFileSync(`./src/generated/${ROUTES_FILE}`)
        await write('../src/routes', ROUTES_FILE)
    } catch (error) {
        console.error(error)
        S3inner.fail()
        Deno.exit(1)
    }
    S3inner.succeed("Routes generated.")
    Deno.exit(0)
}