@page "/events/create"
@attribute [Authorize]
@using WebApp.Components.Shared.Components
@using Core.Utility
@using Microsoft.EntityFrameworkCore
@using MudBlazor
@using WebApp.Services
@inject AppDbContext context
@inject NavigationManager NavigationManager
@inject ISnackbar Snackbar
@inject FormValidationService ValidationService
@inject EventDefinitionService EventDefinitionService

<PageHeader
    Title="Create"
    Subtitle="Event"
    ShowBackButton="true"
    BackButtonUrl="@(ReturnUrl ?? "/events")" />

<EditForm EditContext="@_editContext" OnValidSubmit="OnValidSubmit" OnInvalidSubmit="OnInvalidSubmit" Enhance>
    <FormChangeTracker @ref="_formChangeTracker" />
    <AntiforgeryToken />
    <DataAnnotationsValidator />
    
    <ValidationErrorDisplay Errors="_validationErrors" />

    <MudStack Spacing="4">
        <MudPaper Elevation="2" Class="pa-3 pa-md-6">
            <MudText Typo="Typo.h5" Class="mb-4">Basic Information</MudText>
            <MudGrid Spacing="3">
                <MudItem xs="12" sm="6">
                    <MudTextField T="string" Label="Event Name" @bind-Value="EventDefinition.Name" For="@(() => EventDefinition.Name)" Variant="Variant.Outlined"></MudTextField>
                </MudItem>
                <MudItem xs="12" sm="6">
                    <MudTextField T="string" Label="Short Name" @bind-Value="EventDefinition.ShortName" For="@(() => EventDefinition.ShortName)" Variant="Variant.Outlined"></MudTextField>
                </MudItem>
                <MudItem xs="12">
                    <MudText Typo="Typo.subtitle2" Class="mb-2 mud-text-secondary">Event Format</MudText>
                    <MudRadioGroup T="EventFormat" @bind-Value="@EventDefinition.EventFormat" For="@(() => EventDefinition.EventFormat)">
                        @foreach (EventFormat format in Enum.GetValues(typeof(EventFormat)))
                        {
                            <MudRadio T="EventFormat" Value="@format">@format.ToString()</MudRadio>
                        }
                    </MudRadioGroup>
                </MudItem>
                <MudItem xs="12" sm="6">
                    <MudNumericField T="int?" Label="Level of Effort" @bind-Value="EventDefinition.LevelOfEffort" For="@(() => EventDefinition.LevelOfEffort)" Variant="Variant.Outlined"></MudNumericField>
                </MudItem>
            </MudGrid>
        </MudPaper>

        <MudPaper Elevation="2" Class="pa-3 pa-md-6">
            <MudText Typo="Typo.h5" Class="mb-4">Event Details</MudText>
            <MudGrid Spacing="3">
                <MudItem xs="12">
                    <MudTextField T="string" Label="Description" AutoGrow="true" Lines="3" @bind-Value="EventDefinition.Description" For="@(() => EventDefinition.Description)" Variant="Variant.Outlined"></MudTextField>
                </MudItem>
                <MudItem xs="12">
                    <MudTextField T="string" Label="Theme" AutoGrow="true" Lines="2" @bind-Value="EventDefinition.Theme" For="@(() => EventDefinition.Theme)" Variant="Variant.Outlined"></MudTextField>
                </MudItem>
                <MudItem xs="12">
                    <MudTextField T="string" Label="Documentation" @bind-Value="EventDefinition.Documentation" For="@(() => EventDefinition.Documentation)" Variant="Variant.Outlined"></MudTextField>
                </MudItem>
                <MudItem xs="12">
                    <MudTextField T="string" Label="Related Careers" AutoGrow="true" Lines="5" @bind-Value="EventDefinition.RelatedCareersText" HelperText="Enter one career per line (bullet points will be removed automatically)" Variant="Variant.Outlined"></MudTextField>
                </MudItem>
            </MudGrid>
        </MudPaper>

        <MudPaper Elevation="2" Class="pa-3 pa-md-6">
            <MudText Typo="Typo.h5" Class="mb-4">Team Configuration</MudText>
            <MudGrid Spacing="3">
                <MudItem xs="12">
                    <MudTextField T="string" Label="Nationals Eligibility" @bind-Value="EventDefinition.Eligibility" For="@(() => EventDefinition.Eligibility)" Variant="Variant.Outlined"></MudTextField>
                </MudItem>
                <MudItem xs="12" sm="6">
                    <MudNumericField T="int" Label="Minimum Team Size" @bind-Value="EventDefinition.MinTeamSize" For="@(() => EventDefinition.MinTeamSize)" Variant="Variant.Outlined"></MudNumericField>
                </MudItem>
                <MudItem xs="12" sm="6">
                    <MudNumericField T="int" Label="Maximum Team Size" @bind-Value="EventDefinition.MaxTeamSize" For="@(() => EventDefinition.MaxTeamSize)" Variant="Variant.Outlined"></MudNumericField>
                </MudItem>
                <MudItem xs="12" sm="6">
                    <MudNumericField T="int" Label="Team Count at Regionals" @bind-Value="EventDefinition.ChapterEligibilityCountRegionals" For="@(() => EventDefinition.ChapterEligibilityCountRegionals)" Variant="Variant.Outlined"></MudNumericField>
                </MudItem>
                <MudItem xs="12" sm="6">
                    <MudNumericField T="int" Label="Team Count at State" @bind-Value="EventDefinition.ChapterEligibilityCountState" For="@(() => EventDefinition.ChapterEligibilityCountState)" Variant="Variant.Outlined"></MudNumericField>
                </MudItem>
            </MudGrid>
        </MudPaper>

        <MudPaper Elevation="2" Class="pa-3 pa-md-6">
            <MudText Typo="Typo.h5" Class="mb-4">Competition Details</MudText>
            <MudGrid Spacing="3">
                <MudItem xs="12">
                    <MudTextField T="string" Label="Semifinalist Activity" @bind-Value="EventDefinition.SemifinalistActivity" For="@(() => EventDefinition.SemifinalistActivity)" Variant="Variant.Outlined"></MudTextField>
                </MudItem>
                <MudItem xs="12">
                    <MudCheckBox T="bool" Label="On Site Activity" @bind-Value="EventDefinition.OnSiteActivity" For="@(() => EventDefinition.OnSiteActivity)"></MudCheckBox>
                </MudItem>
                <MudItem xs="12">
                    <MudCheckBox T="bool" Label="Requires Presubmission" @bind-Value="EventDefinition.Presubmission" For="@(() => EventDefinition.Presubmission)"></MudCheckBox>
                </MudItem>
            </MudGrid>

            <FormActions>
                <MudButton ButtonType="ButtonType.Submit" Variant="Variant.Filled" Color="Color.Primary">Create</MudButton>
                <MudButton OnClick="HandleCancel" Variant="Variant.Text">Cancel</MudButton>
            </FormActions>
        </MudPaper>
    </MudStack>
</EditForm>

@code {
    [SupplyParameterFromQuery]
    private string? ReturnUrl { get; set; }

    [SupplyParameterFromForm]
    private EventDefinition EventDefinition { get; set; } = new();

    private FormChangeTracker? _formChangeTracker;
    private EditContext? _editContext;
    private List<string> _validationErrors = new();

    protected override void OnInitialized()
    {
        _editContext = new EditContext(EventDefinition);
    }

    private void OnInvalidSubmit(EditContext editContext)
    {
        _validationErrors = ValidationService.HandleInvalidSubmit(editContext, EventDefinition, errors => _validationErrors = errors);
        StateHasChanged();
    }

    private async Task OnValidSubmit()
    {
        _validationErrors.Clear();
        
        try
        {
            // Normalize and process related careers
            await EventDefinitionService.ProcessRelatedCareersAsync(EventDefinition);

            context.Events.Add(EventDefinition);
            await context.SaveChangesAsync();
            
            Snackbar.Add($"Event '{EventDefinition.Name}' created successfully.", Severity.Success);
            _formChangeTracker?.AllowNavigation();
            NavigationManager.NavigateTo(ReturnUrl ?? "/events");
        }
        catch (DbUpdateException ex)
        {
            ValidationService.HandleDbUpdateException(
                ex,
                "An error occurred while creating the event.",
                "event",
                "creating",
                "name");
        }
        catch (Exception ex)
        {
            ValidationService.HandleException(ex);
        }
    }


    private void HandleCancel()
    {
        _formChangeTracker?.AllowNavigation();
        NavigationManager.NavigateTo(ReturnUrl ?? "/events");
    }
}