/*
Copyright (C) 2025 QuantumNous

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.

For commercial licensing, please contact support@quantumnous.com
*/

import { useCallback, useEffect, useState } from 'react';
import { API, toBoolean } from '../../helpers';

export const useModelDeploymentSettings = () => {
  const [loading, setLoading] = useState(true);
  const [settings, setSettings] = useState({
    'model_deployment.ionet.enabled': false,
    'model_deployment.ionet.api_key': '',
  });
  const [connectionState, setConnectionState] = useState({
    loading: false,
    ok: null,
    error: null,
  });

  const getSettings = async () => {
    try {
      setLoading(true);
      const res = await API.get('/api/option/');
      const { success, data } = res.data;
      
      if (success) {
        const newSettings = {
          'model_deployment.ionet.enabled': false,
          'model_deployment.ionet.api_key': '',
        };
        
        data.forEach((item) => {
          if (item.key.endsWith('enabled')) {
            newSettings[item.key] = toBoolean(item.value);
          } else if (newSettings.hasOwnProperty(item.key)) {
            newSettings[item.key] = item.value || '';
          }
        });
        
        setSettings(newSettings);
      }
    } catch (error) {
      console.error('Failed to get model deployment settings:', error);
    } finally {
      setLoading(false);
    }
  };

  useEffect(() => {
    getSettings();
  }, []);

  const apiKey = settings['model_deployment.ionet.api_key'];
  const isIoNetEnabled = settings['model_deployment.ionet.enabled'] && 
                        apiKey && 
                        apiKey.trim() !== '';

  const buildConnectionError = (rawMessage, fallbackMessage = 'Connection failed') => {
    const message = (rawMessage || fallbackMessage).trim();
    const normalized = message.toLowerCase();
    if (normalized.includes('expired') || normalized.includes('expire')) {
      return { type: 'expired', message };
    }
    if (normalized.includes('invalid') || normalized.includes('unauthorized') || normalized.includes('api key')) {
      return { type: 'invalid', message };
    }
    if (normalized.includes('network') || normalized.includes('timeout')) {
      return { type: 'network', message };
    }
    return { type: 'unknown', message };
  };

  const testConnection = useCallback(async (apiKey) => {
    const key = (apiKey || '').trim();
    if (key === '') {
      setConnectionState({ loading: false, ok: null, error: null });
      return;
    }

    setConnectionState({ loading: true, ok: null, error: null });
    try {
      const response = await API.post(
        '/api/deployments/test-connection',
        { api_key: key },
        { skipErrorHandler: true },
      );

      if (response?.data?.success) {
        setConnectionState({ loading: false, ok: true, error: null });
        return;
      }

      const message = response?.data?.message || 'Connection failed';
      setConnectionState({ loading: false, ok: false, error: buildConnectionError(message) });
    } catch (error) {
      if (error?.code === 'ERR_NETWORK') {
        setConnectionState({
          loading: false,
          ok: false,
          error: { type: 'network', message: 'Network connection failed' },
        });
        return;
      }
      const rawMessage = error?.response?.data?.message || error?.message || 'Unknown error';
      setConnectionState({ loading: false, ok: false, error: buildConnectionError(rawMessage, 'Connection failed') });
    }
  }, []);

  useEffect(() => {
    if (!loading && isIoNetEnabled) {
      testConnection(apiKey);
      return;
    }
    setConnectionState({ loading: false, ok: null, error: null });
  }, [loading, isIoNetEnabled, apiKey, testConnection]);

  return {
    loading,
    settings,
    apiKey,
    isIoNetEnabled,
    refresh: getSettings,
    connectionLoading: connectionState.loading,
    connectionOk: connectionState.ok,
    connectionError: connectionState.error,
    testConnection,
  };
};