using ProjectKnapsack.classes;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using static ProjectKnapsack.classes.KnapsackParameters;

namespace ProjectKnapsack.forms;

public partial class MainForm : Form
{
    private KnapsackVisualizer visualization;
    private KnapsackManager manager;
    private Storage storage;
    private int currentStep;
    private List<Item> items; // Добавление списка предметов

    public MainForm()
    {
        InitializeComponent();
        visualization = new KnapsackVisualizer();
        items = new List<Item>(); // Инициализация списка предметов
    }

    private void startButton_Click(object sender, EventArgs e)
    {
        var parametersForm = new ParametersForm();
        if (parametersForm.ShowDialog() == DialogResult.OK)
        {
            var parameters = parametersForm.Parameters;
            if (parameters != null) // Добавьте проверку на null перед использованием параметров
            {
                manager = new KnapsackManager(parameters);
                manager.Execute();
                storage = manager.Storage;
                currentStep = 0;
                items = parameters.Items.ToList(); // Инициализация списка предметов из параметров
                DisplayCurrentState();
            }
            else
            {
                MessageBox.Show("Parameters are null.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }

    private void DisplayCurrentState()
    {
        //if (storage != null && visualization != null)
        //{
        //    var state = storage.GetState(currentStep);
        //    if (state != null)
        //    {
        //        visualization.Visualize(state.Items, state.Capacity, this);
        //    }
        //    else
        //    {
        //        MessageBox.Show("State is null.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        //    }
        //}
        if (storage != null && visualization != null)
        {
            var state = storage.GetState(currentStep);
            if (state != null)
            {
                visualization.Visualize(state.Items, state.Capacity, state.CurrentWeight, state.CurrentValue, this);
            }
            else
            {
                MessageBox.Show("State is null.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }

    private void saveMenuItem_Click(object sender, EventArgs e)
    {
        if (storage != null)
        {
            using (var saveFileDialog = new SaveFileDialog())
            {
                if (saveFileDialog.ShowDialog() == DialogResult.OK)
                {
                    storage.SaveToFile(saveFileDialog.FileName);
                }
            }
        }
        else
        {
            MessageBox.Show("No data to save.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

    private void loadMenuItem_Click(object sender, EventArgs e)
    {
        using (var openFileDialog = new OpenFileDialog())
        {
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                storage = new Storage();
                storage.LoadFromFile(openFileDialog.FileName);
                currentStep = 0;
                DisplayCurrentState();
            }
        }
    }
    private void aboutMenuItem_Click(object sender, EventArgs e)
    {
        InformationForm informationForm = new InformationForm();
        informationForm.Show();
    }

    private void nextStepButton_Click(object sender, EventArgs e)
    {
        //if (currentStep < storage.StateCount - 1)
        //{
        //    currentStep++;
        //    DisplayCurrentState();
        //}
        if (currentStep < storage.StateCount - 1)
        {
            currentStep++;
            var state = storage.GetState(currentStep);
            if (state != null)
            {
                if (state.Items.Count > currentStep)
                {
                    
                    var addedItem = state.Items[currentStep];
                    items.Remove(addedItem); // Удаление добавленного предмета из списка предметов
                    DisplayCurrentState();
                }
                else
                {
                    MessageBox.Show("Следующего шага нет");
                    return;
                }
            }
        }
    }
    private void prevStepButton_Click(object sender, EventArgs e)
    {
        //if (currentStep > 0)
        //{
        //    currentStep--;
        //    DisplayCurrentState();
        //}
        if (currentStep > 0)
        {
            currentStep--;
            var state = storage.GetState(currentStep);
            if (state != null)
            {
                var addedItem = state.Items[currentStep];
                items.Add(addedItem); // Добавление предмета обратно в список предметов
                DisplayCurrentState();
            }
        }
    }
}