import { defineStore } from "pinia";
import { computed, ref } from "vue";
import { apiGet, apiPost } from "@/api/client";

export interface AuthUser {
  id: number;
  email: string;
  displayName: string;
  isAdmin: boolean;
}

interface MePayload {
  user: AuthUser;
}

export const useAuthStore = defineStore("auth", () => {
  const user = ref<AuthUser | null>(null);
  const checked = ref(false);
  const error = ref<string | null>(null);
  const signupCompleted = ref(false);

  const isAuthenticated = computed(() => user.value !== null);
  const isAdmin = computed(() => user.value?.isAdmin === true);

  async function fetchMe(): Promise<boolean> {
    const result = await apiGet<MePayload>("/me");
    checked.value = true;
    if (result.ok && result.data) {
      user.value = result.data.user;
      return true;
    }
    user.value = null;
    return false;
  }

  async function signup(email: string, displayName: string): Promise<boolean> {
    error.value = null;
    const result = await apiPost<null>("/signup", {
      email,
      displayName,
    });
    if (!result.ok) {
      error.value = result.error;
      return false;
    }
    signupCompleted.value = true;
    return true;
  }

  async function confirmEmail(token: string, password: string): Promise<boolean> {
    error.value = null;
    const result = await apiPost<null>("/confirm-email", {
      token,
      password,
    });
    if (!result.ok) {
      error.value = result.error;
      return false;
    }
    return true;
  }

  async function login(email: string, password: string): Promise<boolean> {
    error.value = null;
    const result = await apiPost<MePayload>("/login", {
      email,
      password,
    });
    if (!result.ok) {
      error.value = result.error;
      return false;
    }
    if (result.data) {
      user.value = result.data.user;
      checked.value = true;
    }
    return true;
  }

  async function logout(): Promise<void> {
    await apiPost<null>("/logout", {});
    user.value = null;
    signupCompleted.value = false;
  }

  function clearError(): void {
    error.value = null;
  }

  return {
    user,
    checked,
    error,
    signupCompleted,
    isAuthenticated,
    isAdmin,
    fetchMe,
    signup,
    confirmEmail,
    login,
    logout,
    clearError,
  };
});