/* Point_stdin.cpp - Read a "Points" data structure from a file, and then read points
   from standard input.  For each point, print the minimum distance to a point in Points.

   James S. Plank
   CS494/594 Lecture notes.
   Fri May 15 15:28:39 EDT 2020
 */

#include "points.hpp"
#include <cmath>
#include <iostream>
#include <stdexcept>
#include <fstream>
#include <sstream>
#include <cstdio>
#include <cstdlib>
using namespace std;

typedef std::runtime_error SRE;

int main(int argc, char **argv)
{
  Points points;
  ifstream fin;
  vector <double> x;
  double d;
  string line;
  istringstream ss;

  if (argc != 2) { fprintf(stderr, "usage: points_stdin point-file\n"); exit(1); }

  /* Read the points from the file given on the command line. */

  fin.open(argv[1]);
  if (fin.fail()) { perror(argv[1]); exit(1); }

  try {
    points.Read(fin);
  } catch (const SRE &e) {
    fprintf(stderr, "Error reading %s:\n%s\n", argv[1], e.what());
    exit(1);
  }

  /* For each line, read a point, and print Min_Distance() called on the point. */

  while (cin >> line) {
    try {
      x.clear();
      ss.clear();
      ss.str(line);
      while (ss >> d) x.push_back(d);
      if (x.size() != 0) printf("%lg\n", points.Min_Distance(x));
    } catch (const SRE &e) {
      printf("%s\n", e.what());
    }
  }
  return 0;
}