/* @flow */

"use strict";

const chalk = require("chalk");
const path = require("path");

function logFrom(fromValue /*: string */) /*: string */ {
  if (fromValue.charAt(0) === "<") return fromValue;

  return path
    .relative(process.cwd(), fromValue)
    .split(path.sep)
    .join("/");
}

module.exports = function(
  report /*:: ?: stylelint$needlessDisablesReport */
) /*: string */ {
  if (!report) return "";

  let output = "";

  report.forEach(sourceReport => {
    if (!sourceReport.ranges || sourceReport.ranges.length === 0) {
      return;
    }

    output += "\n";
    output += chalk.underline(logFrom(sourceReport.source)) + "\n";
    sourceReport.ranges.forEach(range => {
      output += `unused rule: ${range.unusedRule}, start line: ${range.start}`;

      if (range.end !== undefined) {
        output += `, end line: ${range.end}`;
      }

      output += "\n";
    });
  });

  return output;
};