import dotenv from 'dotenv';
import axios from 'axios';

// Lade Umgebungsvariablen
dotenv.config();

// Konfigurationskonstanten
const KEYCLOAK_URL = process.env.KEYCLOAK_URL || 'https://auth.mrx8086.com';
const ADMIN_USERNAME = process.env.KEYCLOAK_ADMIN_USER;
const ADMIN_PASSWORD = process.env.KEYCLOAK_ADMIN_PASSWORD;
const REALM_NAME = 'office-automation';

// Client IDs aus Umgebungsvariablen
const NEXTCLOUD_CLIENT_ID = process.env.NEXTCLOUD_CLIENT_ID || 'nextcloud';
const PAPERLESS_CLIENT_ID = process.env.PAPERLESS_CLIENT_ID || 'paperless';
const NODERED_CLIENT_ID = process.env.NODERED_CLIENT_ID || 'nodered';


// Hilfsfunktion für API-Fehlerbehandlung
const handleAxiosError = (error, operation, config, response) => {
    console.error(`Error during ${operation}:`);
    if (config) {
      console.error('Request:', {
          method: config.method,
          url: config.url,
          headers: config.headers,
          data: config.data,
      });
    }
    if (error.response) {
        console.error('Response:', {
            status: error.response.status,
            data: error.response.data
        });
    } else {
        console.error('Error Message:', error.message);
    }
    throw error;
};

// Admin Token abrufen
async function getAdminToken() {
    try {
        const response = await axios.post(
            `${KEYCLOAK_URL}/realms/master/protocol/openid-connect/token`,
            new URLSearchParams({
                'client_id': 'admin-cli',
                'username': ADMIN_USERNAME,
                'password': ADMIN_PASSWORD,
                'grant_type': 'password'
            }),
            {
                headers: {
                    'Content-Type': 'application/x-www-form-urlencoded'
                }
            }
        );
        return response.data.access_token;
    } catch (error) {
        handleAxiosError(error, 'getting admin token');
    }
}


// Funktion um Client Infos abzufragen
async function getClient(token, clientId) {
    try {
        const response = await axios.get(
            `${KEYCLOAK_URL}/admin/realms/${REALM_NAME}/clients`,
            {
                headers: {
                    'Authorization': `Bearer ${token}`
                },
                params: {
                    clientId: clientId
                }
            }
        );
        if (response.data.length === 0) {
            console.error(`Client ${clientId} not found`);
            return null;
        }

        return response.data[0];
    } catch (error) {
        handleAxiosError(error, `getting client ${clientId}`);
    }
}
// Funktion um Client Mapper abzufragen
async function getClientMappers(token, clientId) {
    try {
        const client = await getClient(token, clientId);
        if (!client) {
            return [];
        }
        const response = await axios.get(
            `${KEYCLOAK_URL}/admin/realms/${REALM_NAME}/clients/${client.id}/protocol-mappers/models`,
            {
                headers: {
                    'Authorization': `Bearer ${token}`
                }
            }
        );
        return response.data;
    } catch (error) {
      handleAxiosError(error, `getting client mappers for ${clientId}`, error.config, error.response);
        return [];
    }
}

async function ensureClientMappers(token, clientId) {
     const client = await getClient(token, clientId);
        if (!client) {
            return console.error(`Client ${clientId} not found, can't create mappers.`);
        }

        let existingMappers = await getClientMappers(token, clientId)


        const requiredMappers = [
            {
                name: "groups",
                protocol: "openid-connect",
                protocolMapper: "oidc-group-membership-mapper",
                config: {
                    "full.path": "true",
                    "id.token.claim": "true",
                    "access.token.claim": "true",
                    "userinfo.token.claim": "true",
                    "claim.name": "groups"
                }
            },
            {
                name: "realm roles",
                protocol: "openid-connect",
                protocolMapper: "oidc-usermodel-realm-role-mapper",
                config: {
                    "id.token.claim": "true",
                    "access.token.claim": "true",
                    "userinfo.token.claim": "true",
                    "claim.name": "roles",
                    "jsonType.label": "String",
                    "multivalued": "true"
                }
            }
        ];

       for (const mapper of requiredMappers) {
            const existingMapper = existingMappers.find(m => m.name === mapper.name);

            try {
                if (existingMapper) {
                    // Update existierenden Mapper
                    await axios.put(
                        `${KEYCLOAK_URL}/admin/realms/${REALM_NAME}/clients/${client.id}/protocol-mappers/models/${existingMapper.id}`,
                        { ...existingMapper, ...mapper },
                        {
                            headers: {
                                'Authorization': `Bearer ${token}`,
                                'Content-Type': 'application/json'
                            }
                        }
                    );
                    console.log(`Mapper ${mapper.name} updated for client ${clientId}`);
                } else {
                    // Erstelle neuen Mapper
                   await axios.post(
                        `${KEYCLOAK_URL}/admin/realms/${REALM_NAME}/clients/${client.id}/protocol-mappers/models`,
                        mapper,
                        {
                            headers: {
                                'Authorization': `Bearer ${token}`,
                                'Content-Type': 'application/json'
                            }
                        }
                    );
                    console.log(`Mapper ${mapper.name} created for client ${clientId}`);
                }
            } catch (error) {
                 handleAxiosError(error, `managing mapper ${mapper.name} for client ${clientId}`, error.config, error.response);
                 // Wir werfen den Fehler nicht weiter, damit andere Mapper noch verarbeitet werden können
            }
       }
     // Get Mappers and log
     existingMappers = await getClientMappers(token, clientId);
     console.log(`Current Mappers for Client ${clientId}:`, existingMappers.map(mapper => ({name: mapper.name, id: mapper.id})));
}



// Hauptfunktion
async function main() {
    try {
        console.log('Starting Client Mapper Check...');
        const token = await getAdminToken();

          // Clients erstellen
        const clients = [
             NEXTCLOUD_CLIENT_ID,
             PAPERLESS_CLIENT_ID,
            NODERED_CLIENT_ID
        ];
        for (const client of clients) {
             await ensureClientMappers(token, client);
        }

        console.log('Client Mapper Check completed successfully');
    } catch (error) {
        console.error('Client Mapper Check failed:', error);
        process.exit(1);
    }
}

// Script ausführen
main();