c968-wgu-project/C968Project/Views/MainScreen.cs

namespace C968Project.Views;

public partial class MainScreen : Form
{
    public MainScreen()
    {
        InitializeComponent();

        productsDataGridView.DataSource = Program.Inventory.Products;
        partsDataGridView.DataSource = Program.Inventory.Parts;
    }

    private void exitButton_Click(object sender, EventArgs e)
    {
        Application.Exit();
    }

    // --- Parts
    private void partsAddButton_Click(object sender, EventArgs e)
    {
        AddModifyPartScreen partScreen = new AddModifyPartScreen(ScreenOption.ADD);
        partScreen.Show();
    }

    private void partsModifyButton_Click(object sender, EventArgs e)
    {
        if (partsDataGridView.CurrentCell is null)
        {
            MessageBox.Show("No part selected", "", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            return;
        }

        Part part = Program.Inventory.LookupPart(partsDataGridView.CurrentCell.RowIndex);
        if (part is null) return;

        AddModifyPartScreen partScreen = new AddModifyPartScreen(ScreenOption.MODIFY, part);
        partScreen.Show();
    }

    private void partsDeleteButton_Click(object sender, EventArgs e)
    {
        if (partsDataGridView.CurrentCell is null)
        {
            MessageBox.Show("No part selected", "", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            return;
        }

        Part part = Program.Inventory.LookupPart(partsDataGridView.CurrentCell.RowIndex);
        if (part is null) return;

        if (CheckPartForProductAssociation(part)) return;
        if (Helpers.ConfirmDelete()) Program.Inventory.DeletePart(part);
    }

    private bool CheckPartForProductAssociation(Part part)
    {
        foreach (var product in Program.Inventory.Products)
        {
            if (product.AssociatedParts.Contains(part))
            {
                MessageBox.Show($"Cannot delete part as it is associated with product: {product.Name}", "", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                return true;
            }
        }

        return false;
    }

    private void partsSearchButton_Click(object sender, EventArgs e)
    {
        Helpers.SearchDataGridView(partsDataGridView, partsSearchTextBox.Text);
    }

    // --- Products
    private void productsAddButton_Click(object sender, EventArgs e)
    {
        AddModifyProductScreen productScreen = new AddModifyProductScreen(ScreenOption.ADD);
        productScreen.Show();
    }

    private void productsModifyButton_Click(object sender, EventArgs e)
    {
        if (productsDataGridView.CurrentCell is null)
        {
            MessageBox.Show("No product selected", "", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            return;
        }

        Product product = Program.Inventory.LookupProduct(productsDataGridView.CurrentCell.RowIndex);
        if (product is null) return;

        AddModifyProductScreen productScreen = new AddModifyProductScreen(ScreenOption.MODIFY, product);
        productScreen.Show();
    }

    private void productsDeleteButton_Click(object sender, EventArgs e)
    {
        if (productsDataGridView.CurrentCell is null)
        {
            MessageBox.Show("No product selected", "", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            return;
        }

        Product product = Program.Inventory.LookupProduct(productsDataGridView.CurrentCell.RowIndex);
        if (product is null) return;

        if (CheckProductForPartAssociations(product)) return;
        if (Helpers.ConfirmDelete()) Program.Inventory.RemoveProduct(Program.Inventory.Products.IndexOf(product));
    }

    private bool CheckProductForPartAssociations(Product product)
    {
        if (product.AssociatedParts.Count == 0) return false;

        string associatedParts = "";

        foreach (var part in product.AssociatedParts)
        {
            associatedParts += part.Name + "\n";
        }

        MessageBox.Show($"Cannot delete product as it has association with parts:\n{associatedParts}", "", MessageBoxButtons.OK, MessageBoxIcon.Warning);

        return true;
    }

    private void productsSearchButton_Click(object sender, EventArgs e)
    {
        Helpers.SearchDataGridView(productsDataGridView, productsSearchTextBox.Text);
    }

    
}