@page "/settings/validation"
@attribute [Authorize(Roles = AuthRoles.Administrator)]
@using Core.Validation
@using WebApp.Authentication
@using WebApp.Components.Shared.Components
@using System.Text.Json
@inject IWebHostEnvironment Environment
@inject IConfiguration Configuration

@rendermode InteractiveServer

<PageHeader
    Title="Validation Settings"
    Description="Configure validation rules and thresholds. Changes take effect on next application restart." />

<MudContainer MaxWidth="MaxWidth.Large" Class="mt-4">

    @if (_config != null)
    {
        <MudPaper Class="pa-6 mb-4">
            <MudText Typo="Typo.h5" Class="mb-4">Event Count Thresholds</MudText>
            <MudGrid>
                <MudItem xs="12" md="6">
                    <MudNumericField @bind-Value="_config.MinRecommendedEvents"
                                   Label="Minimum Recommended Events"
                                   Variant="Variant.Outlined"
                                   HelperText="Warning if student has fewer events"
                                   Min="0" Max="10" />
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudNumericField @bind-Value="_config.MaxRecommendedEvents"
                                   Label="Maximum Recommended Events"
                                   Variant="Variant.Outlined"
                                   HelperText="Warning if student has more events"
                                   Min="0" Max="10" />
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudNumericField @bind-Value="_config.MinCriticalEvents"
                                   Label="Minimum Critical Events"
                                   Variant="Variant.Outlined"
                                   HelperText="Error if student has fewer events"
                                   Min="0" Max="10" />
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudNumericField @bind-Value="_config.MaxCriticalEvents"
                                   Label="Maximum Critical Events"
                                   Variant="Variant.Outlined"
                                   HelperText="Error if student has more events"
                                   Min="0" Max="10" />
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudNumericField @bind-Value="_config.MaxRegionalEvents"
                                   Label="Maximum Regional Events"
                                   Variant="Variant.Outlined"
                                   HelperText="Warning if student has more regional events"
                                   Min="0" Max="10" />
                </MudItem>
            </MudGrid>
        </MudPaper>

        <MudPaper Class="pa-6 mb-4">
            <MudText Typo="Typo.h5" Class="mb-4">Required Event Types</MudText>
            <MudGrid>
                <MudItem xs="12" md="6">
                    <MudSwitch @bind-Value="_config.RequireRegionalEvent"
                             Label="Require Regional Event"
                             Color="Color.Primary" />
                    <MudText Typo="Typo.body2" Class="mud-text-secondary ml-10">
                        Students must have at least one regional event
                    </MudText>
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudSwitch @bind-Value="_config.RequireOnSiteActivity"
                             Label="Require On-Site Activity"
                             Color="Color.Primary" />
                    <MudText Typo="Typo.body2" Class="mud-text-secondary ml-10">
                        Students must have at least one on-site activity
                    </MudText>
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudSwitch @bind-Value="_config.RequireIndividualEvent"
                             Label="Require Individual Event"
                             Color="Color.Primary" />
                    <MudText Typo="Typo.body2" Class="mud-text-secondary ml-10">
                        Students must have at least one individual event
                    </MudText>
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudSwitch @bind-Value="_config.RequireTeamCaptain"
                             Label="Require Team Captain"
                             Color="Color.Primary" />
                    <MudText Typo="Typo.body2" Class="mud-text-secondary ml-10">
                        Team events must have an assigned captain
                    </MudText>
                </MudItem>
            </MudGrid>
        </MudPaper>

        <MudPaper Class="pa-6 mb-4">
            <MudText Typo="Typo.h5" Class="mb-4">Validation Severity Levels</MudText>
            <MudGrid>
                <MudItem xs="12" md="6">
                    <MudSelect @bind-Value="_config.NoRegionalEventSeverity"
                             Label="No Regional Event"
                             Variant="Variant.Outlined">
                        <MudSelectItem Value="ValidationSeverity.Warning">Warning</MudSelectItem>
                        <MudSelectItem Value="ValidationSeverity.Error">Error</MudSelectItem>
                    </MudSelect>
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudSelect @bind-Value="_config.NoOnSiteActivitySeverity"
                             Label="No On-Site Activity"
                             Variant="Variant.Outlined">
                        <MudSelectItem Value="ValidationSeverity.Warning">Warning</MudSelectItem>
                        <MudSelectItem Value="ValidationSeverity.Error">Error</MudSelectItem>
                    </MudSelect>
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudSelect @bind-Value="_config.NoIndividualEventSeverity"
                             Label="No Individual Event"
                             Variant="Variant.Outlined">
                        <MudSelectItem Value="ValidationSeverity.Warning">Warning</MudSelectItem>
                        <MudSelectItem Value="ValidationSeverity.Error">Error</MudSelectItem>
                    </MudSelect>
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudSelect @bind-Value="_config.TeamSizeSeverity"
                             Label="Team Size Issues"
                             Variant="Variant.Outlined">
                        <MudSelectItem Value="ValidationSeverity.Warning">Warning</MudSelectItem>
                        <MudSelectItem Value="ValidationSeverity.Error">Error</MudSelectItem>
                    </MudSelect>
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudSelect @bind-Value="_config.EventCountSeverity"
                             Label="Event Count Issues"
                             Variant="Variant.Outlined">
                        <MudSelectItem Value="ValidationSeverity.Warning">Warning</MudSelectItem>
                        <MudSelectItem Value="ValidationSeverity.Error">Error</MudSelectItem>
                    </MudSelect>
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudSelect @bind-Value="_config.MissingCaptainSeverity"
                             Label="Missing Team Captain"
                             Variant="Variant.Outlined">
                        <MudSelectItem Value="ValidationSeverity.Warning">Warning</MudSelectItem>
                        <MudSelectItem Value="ValidationSeverity.Error">Error</MudSelectItem>
                    </MudSelect>
                </MudItem>
                <MudItem xs="12" md="6">
                    <MudSelect @bind-Value="_config.TooManyRegionalEventsSeverity"
                             Label="Too Many Regional Events"
                             Variant="Variant.Outlined">
                        <MudSelectItem Value="ValidationSeverity.Warning">Warning</MudSelectItem>
                        <MudSelectItem Value="ValidationSeverity.Error">Error</MudSelectItem>
                    </MudSelect>
                </MudItem>
            </MudGrid>
        </MudPaper>

        <MudPaper Class="pa-6">
            <MudGrid>
                <MudItem xs="12">
                    <MudButton Variant="Variant.Filled"
                             Color="Color.Primary"
                             StartIcon="@Icons.Material.Filled.Save"
                             OnClick="SaveConfiguration"
                             Disabled="_isSaving">
                        @if (_isSaving)
                        {
                            <MudProgressCircular Class="mr-2" Size="Size.Small" Indeterminate="true" />
                            <span>Saving...</span>
                        }
                        else
                        {
                            <span>Save Configuration</span>
                        }
                    </MudButton>
                    <MudButton Variant="Variant.Outlined"
                             Class="ml-2"
                             OnClick="ResetToDefaults"
                             Disabled="_isSaving">
                        Reset to Defaults
                    </MudButton>
                </MudItem>
            </MudGrid>
        </MudPaper>

        @if (!string.IsNullOrEmpty(_statusMessage))
        {
            <MudAlert Severity="@_statusSeverity" Class="mt-4">@_statusMessage</MudAlert>
        }
    }
    else
    {
        <MudProgressCircular Indeterminate="true" />
    }
</MudContainer>

@code {
    private ValidationConfiguration? _config;
    private bool _isSaving;
    private string? _statusMessage;
    private Severity _statusSeverity = Severity.Success;

    protected override void OnInitialized()
    {
        // Load from IConfiguration
        _config = Configuration.GetSection("ValidationSettings").Get<ValidationConfiguration>()
                  ?? ValidationConfiguration.Default;
    }

    private string GetAppSettingsPath()
    {
        return Path.Combine(
            Environment.ContentRootPath,
            "Data",
            "appsettings.json");
    }

    private async Task SaveConfiguration()
    {
        if (_config == null) return;

        _isSaving = true;
        _statusMessage = null;

        try
        {
            var appSettingsPath = GetAppSettingsPath();

            // Ensure Data directory exists
            var dataDir = Path.GetDirectoryName(appSettingsPath);
            if (dataDir != null && !Directory.Exists(dataDir))
            {
                Directory.CreateDirectory(dataDir);
            }

            // Read existing appsettings or create new
            JsonDocument? existingDoc = null;
            Dictionary<string, object?> settings;

            if (File.Exists(appSettingsPath))
            {
                var existingJson = await File.ReadAllTextAsync(appSettingsPath);
                existingDoc = JsonDocument.Parse(existingJson);
                settings = JsonSerializer.Deserialize<Dictionary<string, object?>>(existingJson)
                          ?? new Dictionary<string, object?>();
            }
            else
            {
                settings = new Dictionary<string, object?>();
            }

            // Update ValidationSettings section
            settings["ValidationSettings"] = _config;

            // Write back to file
            var options = new JsonSerializerOptions { WriteIndented = true };
            var json = JsonSerializer.Serialize(settings, options);
            await File.WriteAllTextAsync(appSettingsPath, json);

            existingDoc?.Dispose();

            _statusMessage = "Configuration saved successfully! Changes will take effect on next application restart.";
            _statusSeverity = Severity.Success;
        }
        catch (Exception ex)
        {
            _statusMessage = $"Error saving configuration: {ex.Message}";
            _statusSeverity = Severity.Error;
        }
        finally
        {
            _isSaving = false;
        }
    }

    private void ResetToDefaults()
    {
        _config = ValidationConfiguration.Default;
        _statusMessage = "Configuration reset to defaults. Click Save to apply.";
        _statusSeverity = Severity.Info;
    }
}