import { Authorizer } from '@authorizerdev/authorizer-js';
import { Server } from '@hocuspocus/server';

const port = process.env.PORT || 4000;
const authorizer = new Authorizer({
    clientID: process.env.AUTHORIZER_CLIENT_ID || '',
    authorizerURL: process.env.AUTHORIZER_URL || 'https://auth.discours.io',
    redirectURL: process.env.REDIRECT_URL || 'https://testing.discours.io',
});

const server = Server.configure({
    port,
    onConnect({ connection }) {
        connection.requiresAuthentication = true;
    },
    onAuthenticate(data) {
        return new Promise((resolve, reject) => {
            const headers = data.requestHeaders;
            if (!headers) {
                console.error('Request headers not found');
                return reject(new Error('Required header is not present'));
            }

            const shout_id = parseInt(data.documentName.replace('shout-', ''), 10);
            console.debug(`shout_id extracted: ${shout_id}`);

            const token = data.token || headers['authorization'] || '';
            if (!token) {
                console.error('Authorization token not found');
                return reject(new Error('Token is not found'));
            }

            authorizer.validateJWTToken({ token_type: 'access_token', token })
                .then(response => {
                    if (!response?.data?.is_valid) {
                        console.error('Invalid authorization token');
                        return reject(new Error('Token is invalid'));
                    }

                    const { sub: user_id, allowed_roles: roles } = response.data.claims;
                    console.debug(`user_id: ${user_id} roles: ${roles}`);

                    if (roles.includes('editor')) {
                        return resolve({
                            id: user_id,
                            roles: Array.isArray(roles) ? roles : roles.split(','),
                        });
                    }

                    fetch('https://core.discours.io/graphql', {
                        method: 'POST',
                        headers: { 'Content-Type': 'application/json' },
                        body: JSON.stringify({
                            query: `
                  query {
                      get_author(user_id: $user_id) {
                          id
                          slug
                          user
                      }
                  }
              `,
                            variables: { user_id },
                        }),
                    })
                        .then(res => res.json())
                        .then(data => {
                            const { id: author_id } = data.get_author
                            if (author_id) {
                                fetch('https://core.discours.io/graphql', {
                                    method: 'POST',
                                    headers: { 'Content-Type': 'application/json' },
                                    body: JSON.stringify({
                                        query: `query {
                                                    get_shout(shout_id: $shout_id) {
                                                        id
                                                        slug
                                                        authors
                                                    }
                                                }
                                            `,
                                        variables: { shout_id },
                                    }),
                                })
                                    .then(res => res.json())
                                    .then(data => {
                                        const { authors } = data.get_shout;
                                        if (authors.includes(author_id)) {
                                            return resolve({
                                                id: user_id,
                                                author: author_id,
                                                roles: Array.isArray(roles) ? roles : roles.split(','),
                                            });
                                        }
                                        return reject(new Error('User is not in authors list'));
                                    })
                                    .catch(e => {
                                        console.error('Error fetching shout data:', e.message);
                                        console.error(e.stack);
                                        return reject(new Error('Error fetching shout data'));
                                    });
                            }
                        })
                        .catch(e => {
                            console.error('Error fetching author data:', e.message);
                            console.error(e.stack);
                            return reject(new Error('Error fetching author data'));
                        });
                })
                .catch(e => {
                    console.error('Error validating authorization token:', e.message);
                    console.error(e.stack);
                    return reject(new Error('Error validating authorization token'));
                });
        });
    },
});

server.listen().then(r => console.info('Server started'));