import axios from 'axios';
import type { VesselData } from '../types';

const API_BASE_URL = 'https://services.marinetraffic.com/api/vesselmasterdata/v3';

// Get API key at request time to ensure window.env is populated
const getApiKey = (): string | undefined => {
  if (typeof window !== 'undefined' && window.env?.MARINE_TRAFFIC_API_KEY) {
    return window.env.MARINE_TRAFFIC_API_KEY;
  }
  return import.meta.env.VITE_MARINE_TRAFFIC_API_KEY;
};

export async function getVesselData(imo: string): Promise<VesselData> {
  const apiKey = getApiKey(); // Lazy evaluate at request time

  // For development, return mock data if no API key is present
  if (!apiKey) {
    console.warn('No API key found - using mock data');
    return getMockVesselData(imo);
  }

  try {
    const response = await axios.get(API_BASE_URL, {
      params: {
        imo,
        apikey: apiKey,
      }
    });
    
    if (!response.data || response.data.errors) {
      throw new Error('Vessel not found');
    }

    const data = response.data[0]; // API returns an array

    return {
      imo: imo,
      vesselName: data.VESSEL_NAME || 'Unknown',
      type: data.SHIP_TYPE || 'Unknown',
      length: Number(data.LENGTH) || 0,
      width: Number(data.BREADTH) || 0,
      estimatedEnginePower: calculateEstimatedEnginePower(
        Number(data.LENGTH),
        Number(data.BREADTH),
        data.SHIP_TYPE
      )
    };
  } catch (error) {
    console.error('AIS API Error:', error);
    throw new Error('Failed to fetch vessel data. Please check your IMO number and try again.');
  }
}

function calculateEstimatedEnginePower(length: number, width: number, type: string): number {
  // Simplified power estimation based on vessel dimensions
  const baselinePower = length * width * 5; // kW
  
  // Apply vessel type multiplier
  const typeMultiplier = {
    'Yacht': 1.2,
    'Passenger': 1.5,
    'Cargo': 1.0,
    'default': 1.0
  }[type] || 1.0;

  return Math.round(baselinePower * typeMultiplier);
}

// Mock data for development
function getMockVesselData(imo: string): VesselData {
  return {
    imo: imo,
    vesselName: "Sample Yacht",
    type: "Yacht",
    length: 50,
    width: 9,
    estimatedEnginePower: 2250 // 50 * 9 * 5
  };
}