"use client";

import { createContext, useContext, useEffect, useState, ReactNode } from "react";
import { auth, type Org, type Role, type SessionUser } from "@/lib/api";

export type { Org, Role, SessionUser };

interface AuthContextType {
  user: SessionUser | null;
  org: Org | null;
  /** True for owner and admin — the roles the /api/settings and /api/org routes require. */
  isAdmin: boolean;
}

const AuthContext = createContext<AuthContextType>({ user: null, org: null, isAdmin: false });

export function useAuth() {
  return useContext(AuthContext);
}

/**
 * Wraps the authenticated app shell only (see app/(app)/layout.tsx). /login and
 * /setup live outside the group, so no pathname guard is needed here.
 */
export function AuthProvider({ children }: { children: ReactNode }) {
  const [user, setUser] = useState<SessionUser | null>(null);
  const [org, setOrg] = useState<Org | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  useEffect(() => {
    let cancelled = false;

    (async () => {
      try {
        const status = await auth.bootstrapStatus();
        if (status.needs_setup) {
          window.location.href = "/setup";
          return;
        }

        const me = await auth.me();
        if (cancelled) return;
        setUser(me.user);
        setOrg(me.org);
        setLoading(false);
      } catch (err) {
        if (cancelled) return;
        const status = (err as { status?: number }).status;
        if (status === 401) {
          window.location.href = "/login";
          return;
        }
        
        
        
        
        setError((err as Error).message || "Unable to load your session.");
        setLoading(false);
      }
    })();

    return () => {
      cancelled = true;
    };
  }, []);

  if (loading) {
    return (
      <div className="flex h-screen items-center justify-center bg-background">
        <div className="h-8 w-8 animate-spin rounded-full border-2 border-border border-t-accent" />
      </div>
    );
  }

  if (error || !user) {
    return (
      <div className="flex h-screen items-center justify-center bg-background p-4">
        <div className="w-full max-w-md rounded-xl border border-border bg-surface p-6 text-center">
          <h1 className="text-base font-semibold text-text-primary">Can&apos;t load your session</h1>
          <p className="mt-2 text-sm text-text-secondary">
            {error ?? "Unable to load your session."}
          </p>
          <div className="mt-5 flex justify-center gap-2">
            <button
              onClick={() => window.location.reload()}
              className="rounded-lg bg-accent px-3 py-2 text-sm font-medium text-white"
            >
              Retry
            </button>
            <a
              href="/login"
              className="rounded-lg border border-border px-3 py-2 text-sm font-medium text-text-secondary"
            >
              Sign in
            </a>
          </div>
        </div>
      </div>
    );
  }

  const isAdmin = user.role === "owner" || user.role === "admin";

  return (
    <AuthContext.Provider value={{ user, org, isAdmin }}>{children}</AuthContext.Provider>
  );
}