import { CONNECTION_STATES, TRYTON_APPLICATION } from '../app/config.js';
import { apiRequest, getPath } from './client.js';
import { listKitchens } from './kitchens.js';

function extractKey(payload) {
  if (typeof payload === 'string') {
    return payload;
  }

  return payload?.key || payload?.application_key || payload?.data?.key || null;
}

function isAuthFailure(error) {
  const status = error?.cause?.status || error?.status;
  return status === 401 || status === 403;
}

export async function login(store, credentials) {
  const payload = await apiRequest(store, getPath('userApplication'), {
    method: 'POST',
    body: {
      user: credentials.userLogin,
      application: TRYTON_APPLICATION,
    },
    includeKitchen: false,
  });

  const applicationKey = extractKey(payload);
  if (!applicationKey) {
    throw new Error('User application creation did not return a key.');
  }

  const session = {
    userLogin: credentials.userLogin,
    applicationKey,
    state: CONNECTION_STATES.pendingValidation,
    hasValidated: false,
  };
  store.setSession(session);
  return session;
}

export async function restoreSession(store) {
  if (!store.session) {
    return null;
  }

  try {
    return await verifyConnection(store);
  } catch (error) {
    if (!isAuthFailure(error)) {
      throw error;
    }
  }

  return { session: store.session, kitchens: [] };
}

export async function logout(store) {
  try {
    if (store.session?.applicationKey && store.session?.userLogin) {
      await apiRequest(store, getPath('userApplication'), {
        method: 'DELETE',
        body: {
          user: store.session.userLogin,
          key: store.session.applicationKey,
          application: TRYTON_APPLICATION,
        },
        includeKitchen: false,
        skipAuthFailureHandler: true,
      });
    }
  } finally {
    store.clearSessionState();
  }
}

export async function verifyConnection(store) {
  if (!store.session?.applicationKey) {
    return null;
  }

  try {
    const kitchens = await listKitchens(store);
    store.setSession({
      ...store.session,
      state: CONNECTION_STATES.connected,
      hasValidated: true,
    });
    return {
      session: store.session,
      kitchens,
    };
  } catch (error) {
    if (!isAuthFailure(error)) {
      throw error;
    }

    store.setSession({
      ...store.session,
      state: store.session.hasValidated
        ? CONNECTION_STATES.invalidKey
        : CONNECTION_STATES.pendingValidation,
    });

    throw new Error(
      store.session.hasValidated
        ? 'The stored application key is no longer valid.'
        : 'The application key is still waiting for validation in Tryton preferences.',
      {
        cause: error.cause || error,
      },
    );
  }
}