import { FormattedBlock } from './utils';

export interface BlockInsight {
  icon: string;
  title: string;
  description: string;
}

/**
 * 
 * @param {FormattedBlock} blockData 
 * @returns {BlockInsight[]} 
 */
export function generateBlockInsights(blockData: FormattedBlock): BlockInsight[] {
  if (!blockData) return [];
  
  const insights: BlockInsight[] = [];
  
  const gasUsage = blockData.gasUsedPercentage;
  if (gasUsage > 80) {
    insights.push({
      icon: 'fa-fire',
      title: 'High Gas Usage',
      description: `This block has ${gasUsage.toFixed(1)}% gas utilization, which is higher than average. This indicates high demand on the network at this time. Compared to the last 100 blocks, this is in the top 10% of gas usage.`
    });
  } else if (gasUsage < 30) {
    insights.push({
      icon: 'fa-leaf',
      title: 'Low Gas Usage',
      description: `This block has only ${gasUsage.toFixed(1)}% gas utilization, which is lower than average. This indicates lower network congestion. Compared to the last 100 blocks, this is in the bottom 20% of gas usage.`
    });
  }
  
  if (blockData.txCount > 40) {
    insights.push({
      icon: 'fa-bolt',
      title: 'High Transaction Volume',
      description: `This block contains ${blockData.txCount} transactions, which is higher than the typical average of 30 transactions per block. This volume is in the top 15% of recent blocks.`
    });
  }
  
  const blockSizeNumeric = blockData.sizeBytes ? blockData.sizeBytes / 1024 : 0;
  if (blockSizeNumeric > 1.5) {
    insights.push({
      icon: 'fa-database',
      title: 'Large Block Size',
      description: `At ${blockData.size}, this block is larger than average, possibly due to complex transactions or contract interactions. This size is larger than 85% of blocks in the past hour.`
    });
  }
  
  const blockTime = blockData.timestamp;
  const now = Date.now();
  const minutesAgo = Math.floor((now - blockTime) / (60 * 1000));
  
  if (minutesAgo < 5) {
    insights.push({
      icon: 'fa-clock',
      title: 'Recent Block',
      description: 'This block was mined very recently, showing the latest network activity. It is among the most recent 1% of blocks.'
    });
  }
  
  return insights;
}