"use client";

import { SessionContext } from "@/context/session";
import { login, register, setGuestSession } from "@/lib/auth";
import type { FormEvent } from "react";
import { useContext, useEffect, useState } from "react";
import { API_URL } from "@/config";

import Guest from "./Guest";
import Login from "./Login";
import Register from "./Register";

export default function AuthDropdownContent({ onClose }: { onClose?: () => void }) {
  const session = useContext(SessionContext);
  const [activeTab, setActiveTab] = useState<"guest" | "login" | "register">("guest");
  const [serverMessage, setServerMessage] = useState<string | null>(null);
  const [buttonLoading, setButtonLoading] = useState(false);
  const [ssoEnabled, setSsoEnabled] = useState(false);

  useEffect(() => {
    fetch(`${API_URL}/v1/auth/sso/config`, { credentials: "include" })
      .then((res) => res.json())
      .then((data) => {
        if (data && data.enabled) {
          setSsoEnabled(true);
        }
      })
      .catch((err) => console.error("Error loading SSO config:", err));
  }, []);

  function closeDropdown() {
    if (onClose) {
      onClose();
    }
    if (typeof document !== "undefined" && document.activeElement) {
      (document.activeElement as HTMLElement).blur();
    }
  }

  async function submitAuth(e: FormEvent<HTMLFormElement>) {
    e.preventDefault();

    const target = e.target as HTMLFormElement;
    setServerMessage(null);
    setButtonLoading(true);

    try {
      if (activeTab === "guest") {
        const guestName = target.elements.namedItem("guestName") as HTMLInputElement;
        if (!guestName || !guestName.value) return;

        const user = await setGuestSession(guestName.value);
        if (typeof user === "string") {
          setServerMessage(user);
        } else if (user?.id) {
          session?.setUser(user);
          closeDropdown();
          guestName.value = "";
        }
      } else if (activeTab === "login") {
        const loginName = target.elements.namedItem("loginName") as HTMLInputElement;
        const loginPassword = target.elements.namedItem("loginPassword") as HTMLInputElement;
        if (!loginName || !loginName.value || !loginPassword || !loginPassword.value) return;

        const user = await login(loginName.value, loginPassword.value);
        if (typeof user === "string") {
          setServerMessage(user);
        } else if (user?.id) {
          session?.setUser(user);
          closeDropdown();
        }
      } else if (activeTab === "register") {
        const registerName = target.elements.namedItem("registerName") as HTMLInputElement;
        const registerEmail = target.elements.namedItem("registerEmail") as HTMLInputElement;
        const registerPassword = target.elements.namedItem("registerPassword") as HTMLInputElement;
        if (!registerName || !registerName.value || !registerPassword || !registerPassword.value) {
          return;
        }

        const user = await register(
          registerName.value,
          registerPassword.value,
          registerEmail.value || undefined
        );

        if (typeof user === "string") {
          setServerMessage(user);
        } else if (user?.id) {
          session?.setUser(user);
          closeDropdown();
        }
      }
    } finally {
      setButtonLoading(false);
    }
  }

  useEffect(() => {
    setServerMessage(null);
  }, [activeTab]);

  return (
    <div className="flex flex-col gap-4">
      <div className="tabs flex-nowrap w-full">
        <span
          onClick={() => {
            setActiveTab("guest");
          }}
          className={
            "tab tab-bordered tab-border-2 flex-grow rounded-tl-lg cursor-pointer" +
            (activeTab === "guest"
              ? " tab-active text-base-content"
              : " text-base-content border-opacity-10 hover:border-opacity-30")
          }
        >
          Gast
        </span>
        <span
          onClick={() => setActiveTab("login")}
          className={
            "tab tab-bordered tab-border-2 flex-grow rounded-tl-lg cursor-pointer" +
            (activeTab === "login"
              ? " tab-active"
              : " text-base-content border-opacity-10 hover:border-opacity-30")
          }
        >
          Anmelden
        </span>
        <span
          onClick={() => setActiveTab("register")}
          className={
            "tab tab-bordered tab-border-2 flex-grow rounded-tl-lg cursor-pointer" +
            (activeTab === "register"
              ? " tab-active"
              : " text-base-content border-opacity-10 hover:border-opacity-30")
          }
        >
          Registrieren
        </span>
      </div>

      <form className="flex flex-col px-1" onSubmit={submitAuth}>
        {activeTab === "guest" && (
          <Guest currentName={session?.user?.name || "Gast"} />
        )}
        {activeTab === "login" && <Login />}
        {activeTab === "register" && <Register />}

        {serverMessage && <div className="text-error mt-2 text-sm">{serverMessage}</div>}
        
        <div className="mt-4 flex justify-end gap-2">
          <button className={"btn btn-primary btn-sm flex-grow" + (buttonLoading ? " loading" : "")} type="submit">
            {activeTab === "guest" && "Als Gast spielen"}
            {activeTab === "login" && "Anmelden"}
            {activeTab === "register" && "Registrieren"}
          </button>
        </div>

        {ssoEnabled && (
          <>
            <div className="divider opacity-70 my-2 text-xs">oder</div>
            <a
              href={`${API_URL}/v1/auth/sso/login`}
              className="btn btn-accent btn-outline btn-sm w-full gap-2"
            >
              <svg
                xmlns="http://www.w3.org/2000/svg"
                viewBox="0 0 24 24"
                fill="currentColor"
                className="h-4 w-4"
              >
                <path
                  fillRule="evenodd"
                  d="M12 1.5a5.25 5.25 0 0 0-5.25 5.25v3a3 3 0 0 0-3 3v6.75a3 3 0 0 0 3 3h10.5a3 3 0 0 0 3-3v-6.75a3 3 0 0 0-3-3v-3c0-2.9-2.35-5.25-5.25-5.25Zm3.75 8.25v-3a3.75 3.75 0 1 0-7.5 0v3h7.5Z"
                  clipRule="evenodd"
                />
              </svg>
              Anmelden mit Keycloak
            </a>
          </>
        )}
      </form>
    </div>
  );
}