using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace Matrix42.Extensions.Scaffolder.Wizard
{
    public partial class WizardForm : Form
    {
        private readonly List<ProjectDefinition> _projects = new List<ProjectDefinition>();

        public string ExtensionNamespace => txtExtensionNamespace.Text.Trim();
        public IReadOnlyList<ProjectDefinition> Projects => _projects;

        public WizardForm()
        {
            InitializeComponent();

            cboProjectType.DataSource = Enum.GetValues(typeof(ProjectType));

            clbRuntimes.Items.Add("Win");
            clbRuntimes.Items.Add("WinCore");
            clbRuntimes.Items.Add("LinuxCore");
            clbRuntimes.Items.Add("ALL");

            cboProjectType.SelectedIndexChanged += CboProjectType_SelectedIndexChanged;
        }

        private void WizardForm_Load(object sender, EventArgs e)
        {
            lblHint.Text = "aka Matrix42.MyExtension";
        }

        private void CboProjectType_SelectedIndexChanged(object sender, EventArgs e)
        {
            var type = (ProjectType)cboProjectType.SelectedItem;
            switch (type)
            {
                case ProjectType.WebApi:
                    txtProjectPrefix.Text = "Services";
                    txtProjectPrefix.ReadOnly = false;
                    break;
                case ProjectType.Contracts:
                    txtProjectPrefix.Text = "Contracts";
                    txtProjectPrefix.ReadOnly = false;
                    break;
                case ProjectType.BizLogic:
                    txtProjectPrefix.Text = "BizLogic";
                    txtProjectPrefix.ReadOnly = false;
                    break;
                case ProjectType.Custom:
                    txtProjectPrefix.Text = string.Empty;
                    txtProjectPrefix.ReadOnly = false;
                    break;
            }
        }

        private void btnAddProject_Click(object sender, EventArgs e)
        {
            if (!ValidateProjectInputs())
                return;

            var def = new ProjectDefinition
            {
                Type = (ProjectType)cboProjectType.SelectedItem,
                Prefix = txtProjectPrefix.Text.Trim(),
                Runtimes = GetSelectedRuntimes()
            };

            _projects.Add(def);
            lstProjects.Items.Add(def.Display);

            txtProjectPrefix.Clear();
            for (int i = 0; i < clbRuntimes.Items.Count; i++)
                clbRuntimes.SetItemChecked(i, false);
        }

        private RuntimeTargets GetSelectedRuntimes()
        {
            RuntimeTargets result = RuntimeTargets.None;

            foreach (var item in clbRuntimes.CheckedItems)
            {
                switch (item.ToString())
                {
                    case "Win":
                        result |= RuntimeTargets.Win;
                        break;
                    case "WinCore":
                        result |= RuntimeTargets.WinCore;
                        break;
                    case "LinuxCore":
                        result |= RuntimeTargets.LinuxCore;
                        break;
                    case "ALL":
                        result |= RuntimeTargets.All;
                        break;
                }
            }

            return result;
        }

        private bool ValidateProjectInputs()
        {
            if (cboProjectType.SelectedItem == null)
            {
                MessageBox.Show("Please select project type.");
                return false;
            }

            var type = (ProjectType)cboProjectType.SelectedItem;
            if (string.IsNullOrWhiteSpace(txtProjectPrefix.Text))
            {
                if (type == ProjectType.Custom)
                {
                    MessageBox.Show("Project prefix is required for Custom project type.");
                    return false;
                }
            }

            if (clbRuntimes.CheckedItems.Count == 0)
            {
                MessageBox.Show("Please select at least one runtime.");
                return false;
            }

            return true;
        }

        private void btnRemoveSelected_Click(object sender, EventArgs e)
        {
            int idx = lstProjects.SelectedIndex;
            if (idx < 0 || idx >= _projects.Count)
                return;

            _projects.RemoveAt(idx);
            lstProjects.Items.RemoveAt(idx);
        }

        private void btnOK_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrWhiteSpace(ExtensionNamespace))
            {
                MessageBox.Show("Extension Namespace is required.");
                return;
            }

            if (_projects.Count == 0)
            {
                MessageBox.Show("Please add at least one project.");
                return;
            }

            DialogResult = DialogResult.OK;
            Close();
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            DialogResult = DialogResult.Cancel;
            Close();
        }
    }
}