@namespace Oqtane.Modules.Admin.ModuleDefinitions
@inherits ModuleBase
@using System.Text.RegularExpressions
@inject NavigationManager NavigationManager
@inject IModuleDefinitionService ModuleDefinitionService
@inject IModuleService ModuleService
@inject ISettingService SettingService
@inject IStringLocalizer<Create> Localizer

@if (_templates != null)
{
    <table class="table table-borderless">
        <tr>
            <td>
                <Label For="owner" HelpText="Enter the name of the organization who is developing this module. It should not contain spaces or punctuation." ResourceKey="OwnerName">Owner Name: </Label>
            </td>
            <td>
                <input id="owner" class="form-control" @bind="@_owner" />
            </td>
        </tr>
        <tr>
            <td>
                <Label For="module" HelpText="Enter a name for this module. It should not contain spaces or punctuation." ResourceKey="ModuleName">Module Name: </Label>
            </td>
            <td>
                <input id="module" class="form-control" @bind="@_module" />
            </td>
        </tr>
        <tr>
            <td>
                <Label For="description" HelpText="Enter a short description for the module" ResourceKey="Description">Description: </Label>
            </td>
            <td>
                <textarea id="description" class="form-control" @bind="@_description" rows="3"></textarea>
            </td>
        </tr>
        <tr>
            <td>
                <Label For="template" HelpText="Select a module template. Templates are located in the wwwroot/Modules/Templates folder on the server." ResourceKey="Template">Template: </Label>
            </td>
            <td>
                <select id="template" class="form-control" @onchange="(e => TemplateChanged(e))">
                    <option value="-">&lt;@Localizer["Template.Select"]&gt;</option>
                    @foreach (Template template in _templates)
                    {
                        <option value="@template.Name">@template.Title</option>
                    }
                </select>
            </td>
        </tr>
        <tr>
            <td>
                <Label For="reference" HelpText="Select a framework reference version" ResourceKey="FrameworkReference">Framework Reference: </Label>
            </td>
            <td>
                <select id="reference" class="form-control" @bind="@_reference">
                    @foreach (string version in _versions)
                    {
                        if (Version.Parse(version).CompareTo(Version.Parse(_minversion)) >= 0)
                        {
                            <option value="@(version)">@(version)</option>
                        }
                    }
                    <option value="local">@Localizer["LocalVersion"]</option>
                </select>
            </td>
        </tr>
        @if (!string.IsNullOrEmpty(_location))
        {
            <tr>
                <td>
                    <Label For="location" HelpText="Location where the module will be created" ResourceKey="Location">Location: </Label>
                </td>
                <td>
                    <input id="module" class="form-control" @bind="@_location" readonly />
                </td>
            </tr>
        }
    </table>
    <button type="button" class="btn btn-success" @onclick="CreateModule">@Localizer["CreateModule"]</button>
    <NavLink class="btn btn-secondary" href="@NavigateUrl()">@Localizer["Cancel"]</NavLink>
}

@code {
    private string _owner = string.Empty;
    private string _module = string.Empty;
    private string _description = string.Empty;
    private List<Template> _templates;
    private string _template = "-";
    private string[] _versions;
    private string _reference = Constants.Version;
    private string _minversion = "2.0.0";
    private string _location = string.Empty;

    public override SecurityAccessLevel SecurityAccessLevel => SecurityAccessLevel.Host;

    protected override async Task OnParametersSetAsync()
    {
        try
        {
            _templates = await ModuleDefinitionService.GetModuleDefinitionTemplatesAsync();
            _versions = Constants.ReleaseVersions.Split(',').Where(item => Version.Parse(item).CompareTo(Version.Parse("2.0.0")) >= 0).ToArray();
            AddModuleMessage(Localizer["Info.Module.Development"], MessageType.Info);
        }
        catch (Exception ex)
        {
            await logger.LogError(ex, "Error Loading Module Creator");
        }
    }

    private async Task CreateModule()
    {
        try
        {
            if (IsValid(_owner) && IsValid(_module) && _owner != _module && _template != "-")
            {
                var moduleDefinition = new ModuleDefinition { Owner = _owner, Name = _module, Description = _description, Template = _template, Version = _reference };
                moduleDefinition = await ModuleDefinitionService.CreateModuleDefinitionAsync(moduleDefinition);
                GetLocation();
                AddModuleMessage(string.Format(Localizer["Success.Module.Create"], NavigateUrl("admin/system")), MessageType.Success);
            }
            else
            {
                AddModuleMessage(Localizer["Message.Require.ValidName"], MessageType.Warning);
            }
        }
        catch (Exception ex)
        {
            await logger.LogError(ex, "Error Creating Module");
        }
    }

    private bool IsValid(string name)
    {
        // must contain letters, underscores and digits and first character must be letter or underscore
        return !string.IsNullOrEmpty(name) && name.ToLower() != "module" && Regex.IsMatch(name, "^[A-Za-z_][A-Za-z0-9_]*$");
    }

    private void TemplateChanged(ChangeEventArgs e)
    {
        _template = (string)e.Value;
        _minversion = "2.0.0";
        if (_template != "-")
        {
            var template = _templates.FirstOrDefault(item => item.Name == _template);
            _minversion = template.Version;
        }
        GetLocation();
    }

    private void GetLocation()
    {
        _location = string.Empty;
        if (_owner != "" && _module != "" && _template != "-")
        {
            var template = _templates.FirstOrDefault(item => item.Name == _template);
            _location = template.Location + _owner + "." + _module;

        }
        StateHasChanged();
    }
}