Agricultural IoT Dashboard

// Transform weather data for Chart.js
const hourlyData = response.data.timelines[0].intervals;
const chartData = {
  labels: hourlyData.map(interval => 
    new Date(interval.time).toLocaleTimeString('en-US', { 
      hour: '2-digit', 
      minute: '2-digit' 
    })
  ),
  datasets: [
    {
      label: 'Temperature (°C)',
      data: hourlyData.map(interval => interval.values.temperature),
      borderColor: 'rgb(34, 197, 94)',
      backgroundColor: 'rgba(34, 197, 94, 0.1)',
      tension: 0.4
    },
    {
      label: 'Heat Stress Threshold (25°C)',
      data: Array(hourlyData.length).fill(25),
      borderColor: 'rgb(239, 68, 68)',
      borderDash: [5, 5],
      pointRadius: 0
    }
  ]
};

// Create agricultural monitoring chart
new Chart(ctx, {
  type: 'line',
  data: chartData,
  options: {
    responsive: true,
    plugins: {
      title: {
        display: true,
        text: 'Farm Temperature Monitoring - Next 24 Hours'
      },
      legend: {
        display: true,
        position: 'top'
      }
    },
    scales: {
      y: {
        title: {
          display: true,
          text: 'Temperature (°C)'
        },
        min: 10,
        max: 30
      }
    }
  }
});

// Irrigation logic
const currentHumidity = hourlyData[0].values.humidity;
const evapotranspirationRate = hourlyData[0].values.evapotranspiration;

if (currentHumidity < 40 && evapotranspirationRate > 0.3) {
  console.log('⚠️ Irrigation recommended - Low humidity & high ET rate');
} else if (currentHumidity > 80) {
  console.log('✅ Adequate moisture - Monitor for fungal risk');
} else {
  console.log('📊 Moisture levels normal - Continue monitoring');
}

// Validate API response structure
function validateWeatherData(response) {
  if (!response?.data?.timelines?.[0]?.intervals) {
    throw new Error('Invalid API response structure');
  }
  
  const intervals = response.data.timelines[0].intervals;
  if (intervals.length === 0) {
    throw new Error('No weather data intervals found');
  }
  
  // Validate required agricultural fields
  const firstInterval = intervals[0];
  const requiredFields = ['temperature', 'humidity', 'evapotranspiration'];
  
  for (const field of requiredFields) {
    if (typeof firstInterval.values[field] !== 'number') {
      console.warn(`Missing or invalid ${field} data`);
    }
  }
  
  return true;
}

// Handle API errors gracefully
async function fetchFarmWeatherData(coordinates, apiKey) {
  try {
    const response = await fetch(`https://api.tomorrow.io/v4/weather/forecast?location=${coordinates}&apikey=${apiKey}`);
    
    if (!response.ok) {
      if (response.status === 401) {
        throw new Error('Invalid API key');
      } else if (response.status === 429) {
        throw new Error('API rate limit exceeded');
      } else {
        throw new Error(`API error: ${response.status}`);
      }
    }
    
    const data = await response.json();
    validateWeatherData(data);
    return data;
    
  } catch (error) {
    console.error('Weather data fetch failed:', error);
    // Return fallback data or show user-friendly error
    return null;
  }
}