const chalk = require('chalk')
const printf = require('printf')

const printLine = (data, sizes) =>
  data.reduce((line, col, i) => {
    return line + printf(`%-${sizes[i]}s`, col)
  }, '')

// Print a table
module.exports = (fieldNames = [], data = [], margins = []) => {
  // Compute size of each column
  const sizes = data
    .reduce((acc, row) => {
      return row.map((col, i) => {
        const currentMaxColSize = acc[i] || 0
        const colSize = (col && col.length) || 0
        return Math.max(currentMaxColSize, colSize)
      })
    }, fieldNames.map(col => col.length))
    // Add margin to all columns except the last
    .map((size, i) => (i < margins.length && size + margins[i]) || size)

  // Print header
  console.log(chalk.grey(printLine(fieldNames, sizes)))
  // Print content
  data.forEach(row => console.log(printLine(row, sizes)))
}