using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using Graph = NetworkFlow.Graph;

namespace Program
{

    class Program
    {
        static void Main(string[] args)
        {
            List<Analysis> Analysii = new();
            DirectoryInfo graphDir = new DirectoryInfo((args.Length > 0) ? args[0] : "graphs");

            if (!graphDir.Exists)
            {
                Console.WriteLine($"Failed to open {graphDir}: Graph does not exist.");
                System.Environment.Exit(1);
            }
            
            foreach (var file in graphDir.EnumerateFiles())
            {
                Graph graph = ReadFile(file.FullName);
                Analysis analysis = new(graph);
                analysis.Analize();
                Analysii.Add(analysis);
                Console.WriteLine(analysis.ToString());
            }
        }

        public static Graph ReadFile(string file)
        {
            // create default Graph object
            Graph graph = new Graph(undirected: true);

            // Read in graph file
            foreach (string line in File.ReadLines(file))
            {
                // each file line is a Node with optional edges
                // line format:
                // vertex:int optional[ connected-vertex:int edge-weight:double optional[..] ]
                List<string> vals = line.Split(' ').ToList();
                int u, v;
                double weight;
                int.TryParse(vals[0], out u);
                graph.AddNode(u);
                for (int i = 1; i < vals.Count - 1; i += 2)
                {
                    // AddEdge(int u, int v, double weight)
                    int.TryParse(vals[i], out v);
                    double.TryParse(vals[i + 1], out weight);
                    graph.AddEdge(u, v, weight);
                }
            }
            // return object when done
            return graph;
        }
        
    }
}