import path from "path";
import { promises as fs } from "fs";
import chalk from "next/dist/compiled/chalk";
import { APP_DIR_ALIAS } from "./constants";
const globOrig = require("next/dist/compiled/glob");
const glob = (cwd, pattern)=>{
    return new Promise((resolve, reject)=>{
        globOrig(pattern, {
            cwd
        }, (err, files)=>{
            if (err) {
                return reject(err);
            }
            resolve(files);
        });
    });
};
function getRootLayout(isTs) {
    if (isTs) {
        return `export default function RootLayout({
  children,
}: {
  children: React.ReactNode
}) {
  return (
    <html>
      <head />
      <body>{children}</body>
    </html>
  )
}
`;
    }
    return `export default function RootLayout({ children }) {
  return (
    <html>
      <head />
      <body>{children}</body>
    </html>
  )
}
`;
}
function getHead() {
    return `export default function Head() {
  return (
    <>
      <title></title>
      <meta content="width=device-width, initial-scale=1" name="viewport" />
      <link rel="icon" href="/favicon.ico" />
    </>
  )
}
`;
}
export async function verifyRootLayout({ dir , appDir , tsconfigPath , pagePath , pageExtensions  }) {
    let rootLayoutPath;
    try {
        const layoutFiles = await glob(appDir, `**/layout.{${pageExtensions.join(",")}}`);
        const normalizedPagePath = pagePath.replace(`${APP_DIR_ALIAS}/`, "");
        const pagePathSegments = normalizedPagePath.split("/");
        // Find an available dir to place the layout file in, the layout file can't affect any other layout.
        // Place the layout as close to app/ as possible.
        let availableDir;
        if (layoutFiles.length === 0) {
            // If there's no other layout file we can place the layout file in the app dir.
            // However, if the page is within a route group directly under app (e.g. app/(routegroup)/page.js)
            // prefer creating the root layout in that route group.
            const firstSegmentValue = pagePathSegments[0];
            availableDir = firstSegmentValue.startsWith("(") ? firstSegmentValue : "";
        } else {
            pagePathSegments.pop() // remove the page from segments
            ;
            let currentSegments = [];
            for (const segment of pagePathSegments){
                currentSegments.push(segment);
                // Find the dir closest to app/ where a layout can be created without affecting other layouts.
                if (!layoutFiles.some((file)=>file.startsWith(currentSegments.join("/")))) {
                    availableDir = currentSegments.join("/");
                    break;
                }
            }
        }
        if (typeof availableDir === "string") {
            const resolvedTsConfigPath = path.join(dir, tsconfigPath);
            const hasTsConfig = await fs.access(resolvedTsConfigPath).then(()=>true, ()=>false);
            rootLayoutPath = path.join(appDir, availableDir, `layout.${hasTsConfig ? "tsx" : "js"}`);
            await fs.writeFile(rootLayoutPath, getRootLayout(hasTsConfig));
            const headPath = path.join(appDir, availableDir, `head.${hasTsConfig ? "tsx" : "js"}`);
            const hasHead = await fs.access(headPath).then(()=>true, ()=>false);
            if (!hasHead) {
                await fs.writeFile(headPath, getHead());
            }
            console.log(chalk.green(`\nYour page ${chalk.bold(`app/${normalizedPagePath}`)} did not have a root layout. We created ${chalk.bold(`app${rootLayoutPath.replace(appDir, "")}`)}${!hasHead ? ` and ${chalk.bold(`app${headPath.replace(appDir, "")}`)}` : ""} for you.`) + "\n");
            // Created root layout
            return [
                true,
                rootLayoutPath
            ];
        }
    } catch (e) {
        console.error(e);
    }
    // Didn't create root layout
    return [
        false,
        rootLayoutPath
    ];
}

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