export interface EnvConfig {
  PORT?: string;
  PROXY_HOST?: string;
  SERVER_API_URL?: string;
  SITE_ID?: string;
  CLAIM_NAME?: string;
  ACCESS_TOKEN?: string;
  REFRESH_TOKEN?: string;
  AUTH_USER_ID?: string;
}

const defaultConfig: EnvConfig = {
  PORT: "3000",
  PROXY_HOST: "",
  SERVER_API_URL: "",
  SITE_ID: "",
  CLAIM_NAME: "Authorization",
  ACCESS_TOKEN: "access-token",
  REFRESH_TOKEN: "refresh-token",
  AUTH_USER_ID: "token-id",
};

export function generateEnvConfig(values: Partial<EnvConfig>): EnvConfig {
  const filteredValues = Object.entries(values).reduce((acc, [key, value]) => {
    if (value !== undefined && value !== null) {
      acc[key as keyof EnvConfig] = value;
    }
    return acc;
  }, {} as Partial<EnvConfig>);

  if (!filteredValues.PROXY_HOST) {
    filteredValues.PROXY_HOST = `http://localhost:${filteredValues.PORT || defaultConfig.PORT}`;
  }

  return { ...defaultConfig, ...filteredValues };
}

export function getNextConfig(): EnvConfig {
  const env: Partial<EnvConfig> = {
    PORT: process.env.NEXT_PUBLIC_PORT,
    PROXY_HOST: process.env.NEXT_PUBLIC_PROXY_HOST,
    SERVER_API_URL: process.env.NEXT_PUBLIC_SERVER_API_URL,
    SITE_ID: process.env.NEXT_PUBLIC_SITE_ID,
    CLAIM_NAME: process.env.NEXT_PUBLIC_CLAIM_NAME,
    ACCESS_TOKEN: process.env.NEXT_PUBLIC_ACCESS_TOKEN,
    REFRESH_TOKEN: process.env.NEXT_PUBLIC_REFRESH_TOKEN,
    AUTH_USER_ID: process.env.NEXT_PUBLIC_AUTH_USER_ID,
  };
  return generateEnvConfig(env);
}

export function getViteConfig(): EnvConfig {
  const env: Partial<EnvConfig> = {
    PORT: import.meta.env.VITE_PORT,
    PROXY_HOST: import.meta.env.VITE_PROXY_HOST,
    SERVER_API_URL: import.meta.env.VITE_SERVER_API_URL,
    SITE_ID: import.meta.env.VITE_SITE_ID,
    CLAIM_NAME: import.meta.env.VITE_CLAIM_NAME,
    ACCESS_TOKEN: import.meta.env.VITE_ACCESS_TOKEN,
    REFRESH_TOKEN: import.meta.env.VITE_REFRESH_TOKEN,
    AUTH_USER_ID: import.meta.env.VITE_AUTH_USER_ID,
  };
  return generateEnvConfig(env);
}

export function getConfig(): EnvConfig {
  return getNextConfig();
}