@page "/logs"
@using BLAIzor.Models
@inject ApplicationDbContext Db
@attribute [Authorize]

<h3 class="mb-3">📋 Application Logs</h3>

<RadzenCard>
    <div class="row g-3">
        <div class="col-md-2">
            <RadzenDropDown @bind-Value="selectedSeverity"
                            Data="@severities"
                            Placeholder="All Severities"
                            AllowClear="true"
                            Style="width: 100%;" />
        </div>
        <div class="col-md-3">
            <RadzenDatePicker @bind-Value="startDate" Placeholder="From date" Style="width: 100%;" />
        </div>
        <div class="col-md-3">
            <RadzenDatePicker @bind-Value="endDate" Placeholder="To date" Style="width: 100%;" />
        </div>
        <div class="col-md-2">
            <RadzenButton Text="Search" Click="LoadLogs" Icon="search" Style="width: 100%;" />
        </div>
    </div>
</RadzenCard>

<br />

<RadzenDataGrid TItem="AppLog" Data="@logs" Count="@totalCount"
                LoadData="@LoadData" AllowPaging="true" PageSize="10"
                AllowSorting="true" AllowFiltering="false"
                ColumnWidth="200px" ShowPagingSummary="true">
    <Columns>
        <RadzenDataGridColumn Width="100px" TItem="AppLog" Property="Timestamp" Title="Time" FormatString="{0:yyyy-MM-dd HH:mm:ss}" />
        <RadzenDataGridColumn Width="100px" TItem="AppLog" Property="Severity" Title="Severity" />
        <RadzenDataGridColumn TItem="AppLog" Property="Message" Title="Message" />
        <RadzenDataGridColumn TItem="AppLog" Property="Details" Title="Details" />
    </Columns>
</RadzenDataGrid>

<br />

<h4>📊 Log Summary</h4>

<RadzenStack Style="width: 100%;">
    <RadzenChart SeriesClick=@OnSeriesClick>
        <RadzenPieSeries Data="@logChartData" Title="Logs" CategoryProperty="Severity" ValueProperty="Count">
            <RadzenSeriesDataLabels Visible="true" />
        </RadzenPieSeries>
    </RadzenChart>
</RadzenStack>


@code {
    private List<AppLog> logs = new();
    private int totalCount = 0;

    private string? selectedSeverity;
    private DateTime? startDate;
    private DateTime? endDate;

    private List<string> severities = new() { "Info", "Warning", "Error" };

    private List<LogChartItem> logChartData = new();

    void OnSeriesClick(SeriesClickEventArgs args)
    {
        // console.Log(args);
    }

    private async Task LoadData(LoadDataArgs args)
    {
        var query = Db.Logs.AsQueryable();

        if (!string.IsNullOrEmpty(selectedSeverity))
            query = query.Where(l => l.Severity == selectedSeverity);

        if (startDate.HasValue)
            query = query.Where(l => l.Timestamp >= startDate.Value);

        if (endDate.HasValue)
            query = query.Where(l => l.Timestamp <= endDate.Value);

        totalCount = query.Count();

        logs = query
            .OrderByDescending(l => l.Timestamp)
            .Skip(args.Skip ?? 0)
            .Take(args.Top ?? 10).ToList();

        await LoadChartData();
    }

    private async Task LoadLogs()
    {
        await LoadData(new LoadDataArgs { Skip = 0, Top = 10 });
    }

    private async Task LoadChartData()
    {
        var query = Db.Logs.AsQueryable();

        if (!string.IsNullOrEmpty(selectedSeverity))
            query = query.Where(l => l.Severity == selectedSeverity);

        if (startDate.HasValue)
            query = query.Where(l => l.Timestamp >= startDate.Value);

        if (endDate.HasValue)
            query = query.Where(l => l.Timestamp <= endDate.Value);

        logChartData = query
            .GroupBy(l => l.Severity)
            .Select(g => new LogChartItem
                {
                    Severity = g.Key,
                    Count = g.Count()
                })
            .ToList();
    }

    public class LogChartItem
    {
        public string Severity { get; set; } = "";
        public int Count { get; set; }
    }
}