import { Injectable } from "@nestjs/common";
import { createClient, SupabaseClient } from "@supabase/supabase-js";

@Injectable()
export class SupabaseService {
  private readonly client: SupabaseClient;

  constructor() {
    const url = this.requireEnv("SUPABASE_URL");
    const serviceKey =
      process.env.SUPABASE_SERVICE_KEY ?? process.env.SUPABASE_ANON_KEY;
    if (!serviceKey) {
      throw new Error(
        "Missing SUPABASE_SERVICE_KEY (preferred) or SUPABASE_ANON_KEY environment variable."
      );
    }
    this.client = createClient(url, serviceKey, {
      auth: { persistSession: false }
    });
  }

  getClient() {
    return this.client;
  }

  private requireEnv(name: string) {
    const value = process.env[name];
    if (!value) {
      throw new Error(`Missing ${name} environment variable.`);
    }
    return value;
  }
}