using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Text;

using System.Windows.Forms;

using OpenHardwareMonitor.Hardware;

using OpenHardwareMonitor.Utilities;

namespace OpenHardwareMonitor.GUI {

  public partial class ParameterForm : Form {

    private IReadOnlyArray<IParameter> parameters;

    private BindingList<ParameterRow> parameterRows;

    public ParameterForm() {

      InitializeComponent();

    }

    public IReadOnlyArray<IParameter> Parameters {

      get {

        return parameters;

      }

      set {

        parameters = value;

        parameterRows = new BindingList<ParameterRow>();

        foreach (IParameter parameter in parameters)

          parameterRows.Add(new ParameterRow(parameter));

        bindingSource.DataSource = parameterRows;

      }

    }

    private class ParameterRow : INotifyPropertyChanged {

      public IParameter parameter;

      private float value;

      public bool isDefault;

      public event PropertyChangedEventHandler PropertyChanged;

      private void NotifyPropertyChanged(String propertyName) {

        if (PropertyChanged != null) {

          PropertyChanged(this, new PropertyChangedEventArgs(propertyName));

        }

      }

      public ParameterRow(IParameter parameter){

        this.parameter = parameter;

        this.value = parameter.Value;

        this.isDefault = parameter.IsDefault;

      }

      public string Name {

        get { return parameter.Name; }

      }

      public float Value {

        get { return value; }

        set {            

          this.isDefault = false;

          this.value = value;

          NotifyPropertyChanged("Default");

          NotifyPropertyChanged("Value");

        }

      }

      public bool Default {

        get { return isDefault; }

        set {

          isDefault = value;

          if (value)

            this.value = parameter.DefaultValue;

          NotifyPropertyChanged("Default");

          NotifyPropertyChanged("Value");

        }

      }

    }

    private void dataGridView_RowEnter(object sender, 

      DataGridViewCellEventArgs e) 

    {

      if (e.RowIndex >= 0 && e.RowIndex < parameters.Length)

        descriptionLabel.Text = parameters[e.RowIndex].Description;

      else

        descriptionLabel.Text = "";

    }

    private void dataGridView_CellValidating(object sender, 

      DataGridViewCellValidatingEventArgs e) 

    {

      float value;

      if (e.ColumnIndex == 2 &&

        !float.TryParse(e.FormattedValue.ToString(), out value)) {

        dataGridView.Rows[e.RowIndex].Cells[0].ErrorText = 

          "Invalid value";

        e.Cancel = true;

      }

    }

    private void dataGridView_CellEndEdit(object sender,

      DataGridViewCellEventArgs e) {

      dataGridView.Rows[e.RowIndex].Cells[0].ErrorText = "";

    }

    private void okButton_Click(object sender, EventArgs e) {

      foreach (ParameterRow row in parameterRows) {

        if (row.Default) {

          row.parameter.IsDefault = true;

        } else {

          row.parameter.Value = row.Value;

        }

      }

    }

    private void dataGridView_CurrentCellDirtyStateChanged(object sender, 

      EventArgs e) {

      if (dataGridView.CurrentCell is DataGridViewCheckBoxCell ||

        dataGridView.CurrentCell is DataGridViewComboBoxCell) 

      {

        dataGridView.CommitEdit(DataGridViewDataErrorContexts.Commit);

      }

    }

  }

}