import { addBasePath } from "./add-base-path";
import { interpolateAs } from "../shared/lib/router/utils/interpolate-as";
import getAssetPathFromRoute from "../shared/lib/router/utils/get-asset-path-from-route";
import { addLocale } from "./add-locale";
import { isDynamicRoute } from "../shared/lib/router/utils/is-dynamic";
import { parseRelativeUrl } from "../shared/lib/router/utils/parse-relative-url";
import { removeTrailingSlash } from "../shared/lib/router/utils/remove-trailing-slash";
import { createRouteLoader, getClientBuildManifest } from "./route-loader";
import { DEV_CLIENT_PAGES_MANIFEST, DEV_MIDDLEWARE_MANIFEST } from "../shared/lib/constants";
class PageLoader {
    getPageList() {
        if (process.env.NODE_ENV === "production") {
            return getClientBuildManifest().then((manifest)=>manifest.sortedPages);
        } else {
            if (window.__DEV_PAGES_MANIFEST) {
                return window.__DEV_PAGES_MANIFEST.pages;
            } else {
                this.promisedDevPagesManifest || (this.promisedDevPagesManifest = fetch(this.assetPrefix + "/_next/static/development/" + DEV_CLIENT_PAGES_MANIFEST, {
                    credentials: "same-origin"
                }).then((res)=>res.json()).then((manifest)=>{
                    window.__DEV_PAGES_MANIFEST = manifest;
                    return manifest.pages;
                }).catch((err)=>{
                    console.log("Failed to fetch devPagesManifest:", err);
                    throw new Error("Failed to fetch _devPagesManifest.json. Is something blocking that network request?\n" + "Read more: https://nextjs.org/docs/messages/failed-to-fetch-devpagesmanifest");
                }));
                return this.promisedDevPagesManifest;
            }
        }
    }
    getMiddleware() {
        if (process.env.NODE_ENV === "production") {
            const middlewareMatchers = process.env.__NEXT_MIDDLEWARE_MATCHERS;
            window.__MIDDLEWARE_MATCHERS = middlewareMatchers ? middlewareMatchers : undefined;
            return window.__MIDDLEWARE_MATCHERS;
        } else {
            if (window.__DEV_MIDDLEWARE_MATCHERS) {
                return window.__DEV_MIDDLEWARE_MATCHERS;
            } else {
                if (!this.promisedMiddlewareMatchers) {
                    // TODO: Decide what should happen when fetching fails instead of asserting
                    // @ts-ignore
                    this.promisedMiddlewareMatchers = fetch(this.assetPrefix + "/_next/static/" + this.buildId + "/" + DEV_MIDDLEWARE_MANIFEST, {
                        credentials: "same-origin"
                    }).then((res)=>res.json()).then((matchers)=>{
                        window.__DEV_MIDDLEWARE_MATCHERS = matchers;
                        return matchers;
                    }).catch((err)=>{
                        console.log("Failed to fetch _devMiddlewareManifest", err);
                    });
                }
                // TODO Remove this assertion as this could be undefined
                return this.promisedMiddlewareMatchers;
            }
        }
    }
    getDataHref(params) {
        const { asPath, href, locale } = params;
        const { pathname: hrefPathname, query, search } = parseRelativeUrl(href);
        const { pathname: asPathname } = parseRelativeUrl(asPath);
        const route = removeTrailingSlash(hrefPathname);
        if (route[0] !== "/") {
            throw new Error('Route name should start with a "/", got "' + route + '"');
        }
        const getHrefForSlug = (path)=>{
            const dataRoute = getAssetPathFromRoute(removeTrailingSlash(addLocale(path, locale)), ".json");
            return addBasePath("/_next/data/" + this.buildId + dataRoute + search, true);
        };
        return getHrefForSlug(params.skipInterpolation ? asPathname : isDynamicRoute(route) ? interpolateAs(hrefPathname, asPathname, query).result : route);
    }
    _isSsg(/** the route (file-system path) */ route) {
        return this.promisedSsgManifest.then((manifest)=>manifest.has(route));
    }
    loadPage(route) {
        return this.routeLoader.loadRoute(route).then((res)=>{
            if ("component" in res) {
                return {
                    page: res.component,
                    mod: res.exports,
                    styleSheets: res.styles.map((o)=>({
                            href: o.href,
                            text: o.content
                        }))
                };
            }
            throw res.error;
        });
    }
    prefetch(route) {
        return this.routeLoader.prefetch(route);
    }
    constructor(buildId, assetPrefix){
        this.routeLoader = createRouteLoader(assetPrefix);
        this.buildId = buildId;
        this.assetPrefix = assetPrefix;
        this.promisedSsgManifest = new Promise((resolve)=>{
            if (window.__SSG_MANIFEST) {
                resolve(window.__SSG_MANIFEST);
            } else {
                window.__SSG_MANIFEST_CB = ()=>{
                    resolve(window.__SSG_MANIFEST);
                };
            }
        });
    }
}
export { PageLoader as default };

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