import { createClient, SupabaseClient } from "@supabase/supabase-js";
import type { Database } from "@/types/supabase";

let supabase: SupabaseClient<Database> | null = null;

// 简单的存储适配器，使用localStorage
const storageAdapter = {
  getItem: async (key: string) => {
    try {
      const item = localStorage.getItem(key);
      return item;
    } catch (error) {
      console.error("Storage get error:", error);
      return null;
    }
  },

  setItem: async (key: string, value: string) => {
    try {
      localStorage.setItem(key, value);
    } catch (error) {
      console.error("Storage set error:", error);
    }
  },

  removeItem: async (key: string) => {
    try {
      localStorage.removeItem(key);
    } catch (error) {
      console.error("Storage remove error:", error);
    }
  },
};

export const getSupabaseClient = (): SupabaseClient<Database> => {
  if (!supabase) {
    if (!process.env.NEXT_PUBLIC_SUPABASE_URL || !process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY) {
      throw new Error('Missing Supabase environment variables');
    }

    supabase = createClient<Database>(
      process.env.NEXT_PUBLIC_SUPABASE_URL,
      process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY,
      {
        db: { schema: "limq" },
        auth: {
          storage: storageAdapter,
          persistSession: true,
          autoRefreshToken: true,
        },
      }
    );
  }
  return supabase;
};

export const clearSupabaseInstance = () => {
  supabase = null;
};