"use client";

import {
	createContext,
	type ReactNode,
	useContext,
	useEffect,
	useState,
} from "react";
import { authClient, useSession } from "./auth";

type Organization = typeof authClient.$Infer.ActiveOrganization;
type SessionData = NonNullable<ReturnType<typeof useSession>["data"]>;

interface AuthContextType {
	session: SessionData["session"] | null;
	user: SessionData["user"] | null;
	org: Organization | null;
	setActiveOrg: (orgSlug: string) => Promise<void>;
}

const AuthContext = createContext<AuthContextType | undefined>(undefined);

export function AuthProvider({ children }: { children: ReactNode }) {
	const { data: session } = useSession();
	const [org, setOrg] = useState<Organization | null>(null);

	useEffect(() => {
		if (session?.session.activeOrganizationId) {
			authClient.organization.getFullOrganization().then((org) => {
				setOrg(org);
			});
		}
	}, [session?.session.activeOrganizationId]);

	// When a session exists and there is a pending login method recorded,
	// promote it to the last-used method (successful login) and clear pending.
	useEffect(() => {
		if (typeof window === "undefined") return;
		if (!session?.session) return;

		try {
			const pendingMethod = localStorage.getItem(
				"supermemory-pending-login-method",
			);
			const pendingTsRaw = localStorage.getItem(
				"supermemory-pending-login-timestamp",
			);

			if (pendingMethod) {
				const now = Date.now();
				const ts = pendingTsRaw
					? Number.parseInt(pendingTsRaw, 10)
					: Number.NaN;
				const isFresh = Number.isFinite(ts) && now - ts < 10 * 60 * 1000; // 10 minutes TTL

				if (isFresh) {
					localStorage.setItem("supermemory-last-login-method", pendingMethod);
				}
			}
		} catch {}
		// Always clear pending markers once a session is present
		try {
			localStorage.removeItem("supermemory-pending-login-method");
			localStorage.removeItem("supermemory-pending-login-timestamp");
		} catch {}
	}, [session?.session]);

	const setActiveOrg = async (slug: string) => {
		if (!slug) return;

		const activeOrg = await authClient.organization.setActive({
			organizationSlug: slug,
		});
		setOrg(activeOrg);
	};

	return (
		<AuthContext.Provider
			value={{
				org,
				session: session?.session ?? null,
				user: session?.user ?? null,
				setActiveOrg,
			}}
		>
			{children}
		</AuthContext.Provider>
	);
}

export function useAuth() {
	const context = useContext(AuthContext);
	if (context === undefined) {
		throw new Error("useAuth must be used within an AuthProvider");
	}
	return context;
}