import { useContext, useMemo } from "react";
import { AppRouterContext, GlobalLayoutRouterContext, LayoutRouterContext } from "../../shared/lib/app-router-context.shared-runtime";
import { SearchParamsContext, PathnameContext } from "../../shared/lib/hooks-client-context.shared-runtime";
import { clientHookInServerComponentError } from "./client-hook-in-server-component-error";
import { getSegmentValue } from "./router-reducer/reducers/get-segment-value";
const INTERNAL_URLSEARCHPARAMS_INSTANCE = Symbol("internal for urlsearchparams readonly");
function readonlyURLSearchParamsError() {
    return new Error("ReadonlyURLSearchParams cannot be modified");
}
export class ReadonlyURLSearchParams {
    [Symbol.iterator]() {
        return this[INTERNAL_URLSEARCHPARAMS_INSTANCE][Symbol.iterator]();
    }
    append() {
        throw readonlyURLSearchParamsError();
    }
    delete() {
        throw readonlyURLSearchParamsError();
    }
    set() {
        throw readonlyURLSearchParamsError();
    }
    sort() {
        throw readonlyURLSearchParamsError();
    }
    constructor(urlSearchParams){
        this[INTERNAL_URLSEARCHPARAMS_INSTANCE] = urlSearchParams;
        this.entries = urlSearchParams.entries.bind(urlSearchParams);
        this.forEach = urlSearchParams.forEach.bind(urlSearchParams);
        this.get = urlSearchParams.get.bind(urlSearchParams);
        this.getAll = urlSearchParams.getAll.bind(urlSearchParams);
        this.has = urlSearchParams.has.bind(urlSearchParams);
        this.keys = urlSearchParams.keys.bind(urlSearchParams);
        this.values = urlSearchParams.values.bind(urlSearchParams);
        this.toString = urlSearchParams.toString.bind(urlSearchParams);
        this.size = urlSearchParams.size;
    }
}
/**
 * Get a read-only URLSearchParams object. For example searchParams.get('foo') would return 'bar' when ?foo=bar
 * Learn more about URLSearchParams here: https://developer.mozilla.org/docs/Web/API/URLSearchParams
 */ export function useSearchParams() {
    clientHookInServerComponentError("useSearchParams");
    const searchParams = useContext(SearchParamsContext);
    // In the case where this is `null`, the compat types added in
    // `next-env.d.ts` will add a new overload that changes the return type to
    // include `null`.
    const readonlySearchParams = useMemo(()=>{
        if (!searchParams) {
            // When the router is not ready in pages, we won't have the search params
            // available.
            return null;
        }
        return new ReadonlyURLSearchParams(searchParams);
    }, [
        searchParams
    ]);
    if (typeof window === "undefined") {
        // AsyncLocalStorage should not be included in the client bundle.
        const { bailoutToClientRendering  } = require("./bailout-to-client-rendering");
        if (bailoutToClientRendering()) {
            // TODO-APP: handle dynamic = 'force-static' here and on the client
            return readonlySearchParams;
        }
    }
    return readonlySearchParams;
}
/**
 * Get the current pathname. For example usePathname() on /dashboard?foo=bar would return "/dashboard"
 */ export function usePathname() {
    clientHookInServerComponentError("usePathname");
    // In the case where this is `null`, the compat types added in `next-env.d.ts`
    // will add a new overload that changes the return type to include `null`.
    return useContext(PathnameContext);
}
export { ServerInsertedHTMLContext, useServerInsertedHTML } from "../../shared/lib/server-inserted-html.shared-runtime";
/**
 * Get the router methods. For example router.push('/dashboard')
 */ export function useRouter() {
    clientHookInServerComponentError("useRouter");
    const router = useContext(AppRouterContext);
    if (router === null) {
        throw new Error("invariant expected app router to be mounted");
    }
    return router;
}
// this function performs a depth-first search of the tree to find the selected
// params
function getSelectedParams(tree, params) {
    if (params === void 0) params = {};
    const parallelRoutes = tree[1];
    for (const parallelRoute of Object.values(parallelRoutes)){
        const segment = parallelRoute[0];
        const isDynamicParameter = Array.isArray(segment);
        const segmentValue = isDynamicParameter ? segment[1] : segment;
        if (!segmentValue || segmentValue.startsWith("__PAGE__")) continue;
        // Ensure catchAll and optional catchall are turned into an array
        const isCatchAll = isDynamicParameter && (segment[2] === "c" || segment[2] === "oc");
        if (isCatchAll) {
            params[segment[0]] = segment[1].split("/");
        } else if (isDynamicParameter) {
            params[segment[0]] = segment[1];
        }
        params = getSelectedParams(parallelRoute, params);
    }
    return params;
}
/**
 * Get the current parameters. For example useParams() on /dashboard/[team]
 * where pathname is /dashboard/nextjs would return { team: 'nextjs' }
 */ export function useParams() {
    clientHookInServerComponentError("useParams");
    const globalLayoutRouterContext = useContext(GlobalLayoutRouterContext);
    if (!globalLayoutRouterContext) {
        // This only happens in `pages`. Type is overwritten in navigation.d.ts
        return null;
    }
    return getSelectedParams(globalLayoutRouterContext.tree);
}
// TODO-APP: handle parallel routes
/**
 * Get the canonical parameters from the current level to the leaf node.
 */ function getSelectedLayoutSegmentPath(tree, parallelRouteKey, first, segmentPath) {
    if (first === void 0) first = true;
    if (segmentPath === void 0) segmentPath = [];
    let node;
    if (first) {
        // Use the provided parallel route key on the first parallel route
        node = tree[1][parallelRouteKey];
    } else {
        // After first parallel route prefer children, if there's no children pick the first parallel route.
        const parallelRoutes = tree[1];
        var _parallelRoutes_children;
        node = (_parallelRoutes_children = parallelRoutes.children) != null ? _parallelRoutes_children : Object.values(parallelRoutes)[0];
    }
    if (!node) return segmentPath;
    const segment = node[0];
    const segmentValue = getSegmentValue(segment);
    if (!segmentValue || segmentValue.startsWith("__PAGE__")) return segmentPath;
    segmentPath.push(segmentValue);
    return getSelectedLayoutSegmentPath(node, parallelRouteKey, false, segmentPath);
}
// TODO-APP: Expand description when the docs are written for it.
/**
 * Get the canonical segment path from the current level to the leaf node.
 */ export function useSelectedLayoutSegments(parallelRouteKey) {
    if (parallelRouteKey === void 0) parallelRouteKey = "children";
    clientHookInServerComponentError("useSelectedLayoutSegments");
    const { tree  } = useContext(LayoutRouterContext);
    return getSelectedLayoutSegmentPath(tree, parallelRouteKey);
}
// TODO-APP: Expand description when the docs are written for it.
/**
 * Get the segment below the current level
 */ export function useSelectedLayoutSegment(parallelRouteKey) {
    if (parallelRouteKey === void 0) parallelRouteKey = "children";
    clientHookInServerComponentError("useSelectedLayoutSegment");
    const selectedLayoutSegments = useSelectedLayoutSegments(parallelRouteKey);
    if (selectedLayoutSegments.length === 0) {
        return null;
    }
    return selectedLayoutSegments[0];
}
export { redirect, permanentRedirect, RedirectType } from "./redirect";
export { notFound } from "./not-found";

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