import { Client, Account, Databases } from 'node-appwrite';
import { cookies } from 'next/headers';

// Robust instance-level patch for Appwrite Next.js Server Components
export function patchClientInstance(client: any) {
  if (client._isPatched) return client;
  const originalCall = client.call.bind(client);
  client.call = async function (...args: any[]) {
    // Suppress Appwrite version mismatch warnings during this call
    const oldWarn = console.warn;
    console.warn = (...warnArgs: any[]) => {
      if (warnArgs[0] && typeof warnArgs[0] === 'string' && warnArgs[0].includes('built for Appwrite')) return;
      oldWarn(...warnArgs);
    };
    try {
      const res = await originalCall(...args);
      // Ensure all objects are fully plain JSON (strips getters/prototypes that break Server -> Client transitions)
      if (res && typeof res === 'object') {
        return JSON.parse(JSON.stringify(res));
      }
      return res;
    } finally {
      console.warn = oldWarn;
    }
  };
  client._isPatched = true;
  return client;
}

const ENDPOINT = process.env.NEXT_PUBLIC_APPWRITE_ENDPOINT || 'https://appwrite.almeira.com.co/v1';
const PROJECT_ID = process.env.NEXT_PUBLIC_APPWRITE_PROJECT_ID || '69b84df5003bd8957c5c';
const COOKIE_NAME = `a_session_${PROJECT_ID.toLowerCase()}`;

export async function createSessionClient() {
  const cookieStore = await cookies();
  const sessionCookie = cookieStore.get(COOKIE_NAME);

  if (!sessionCookie || !sessionCookie.value) {
    return null;
  }

  const client = new Client()
    .setEndpoint(ENDPOINT)
    .setProject(PROJECT_ID);

  // Soporte para bypass de administrador (Emergencia/Dev)
  if (sessionCookie.value === "admin-bypass-session") {
    // Escalamos a privilegios de API Key para el bypass
    client.setKey((process.env.APPWRITE_API_KEY || '').trim());
  } else {
    client.setSession(sessionCookie.value);
  }

  patchClientInstance(client);

  return {
    get account() {
      return new Account(client);
    },
    get databases() {
      return new Databases(client);
    }
  };
}

export async function createAdminClient() {
  const client = new Client()
    .setEndpoint(ENDPOINT)
    .setProject(PROJECT_ID)
    .setKey((process.env.APPWRITE_API_KEY || '').trim());

  patchClientInstance(client);
  


  return {
    get account() {
      return new Account(client);
    },
    get databases() {
      return new Databases(client);
    }
  };
}

export async function getLoggedInUser() {
  try {
    const cookieStore = await cookies();
    const sessionCookie = cookieStore.get(COOKIE_NAME);

    // Verificación de bypass (Evitamos imprimir log repetitivo a menos que sea un error)
    if (sessionCookie?.value === "admin-bypass-session") {
      return { 
        $id: "admin-emergency",
        name: "Administrador (Emergencia)", 
        email: "admin@almeira.com.co",
        prefs: { role: 'admin' } 
      };
    }

    if (!sessionCookie || !sessionCookie.value) {
      return null;
    }

    const sessionClient = await createSessionClient();
    if (!sessionClient) {
      return null;
    }
    
    return await sessionClient.account.get();
  } catch (error: any) {
    // Next.js uses a specific error to bailout of static generation. We MUST re-throw it.
    if (error?.digest === 'DYNAMIC_SERVER_USAGE' || error?.message?.includes('Dynamic server usage')) {
      throw error;
    }
    if (error?.code !== 401) {
       console.error("getLoggedInUser: Error al validar sesión:", error.message || error);
    }
    return null;
  }
}