@page "/logs"
@using Microsoft.EntityFrameworkCore
@inject IDbContextFactory<AppDbContext> DbFactory

<PageTitle>Logs</PageTitle>

<MudText Typo="Typo.h4" Class="mb-4">Logs</MudText>

<MudGrid Class="mb-4">
    <MudItem xs="12" md="3"><MudTextField Label="Land" @bind-Value="filterLand" /></MudItem>
    <MudItem xs="12" md="3">
        <MudSelect T="string" Label="Status" @bind-Value="filterStatus">
            <MudSelectItem Value="">Alle</MudSelectItem>
            <MudSelectItem Value="OK">OK</MudSelectItem>
            <MudSelectItem Value="Error">Error</MudSelectItem>
        </MudSelect>
    </MudItem>
    <MudItem xs="12" md="3"><MudDatePicker Label="Ab Datum" @bind-Date="filterFromDate" /></MudItem>
    <MudItem xs="12" md="3"><MudButton Variant="Variant.Filled" OnClick="LoadAsync">Filtern</MudButton></MudItem>
</MudGrid>

<MudStack Row="true" Spacing="2" Class="mb-2">
    <MudNumericField T="int" Label="Logs älter als Tage löschen" @bind-Value="deleteOlderThanDays" Min="1" />
    <MudButton Variant="Variant.Outlined" Color="Color.Error" OnClick="DeleteOlderAsync">Logs löschen</MudButton>
</MudStack>

<MudTable Items="logs" Dense="true" Hover="true" RowClassFunc="GetRowClass">
    <HeaderContent>
        <MudTh>Timestamp</MudTh>
        <MudTh>Land</MudTh>
        <MudTh>TSC</MudTh>
        <MudTh>Status</MudTh>
        <MudTh>Rows</MudTh>
        <MudTh>Dauer</MudTh>
        <MudTh>Fehler</MudTh>
        <MudTh>Dateiname</MudTh>
    </HeaderContent>
    <RowTemplate>
        <MudTd>@context.Timestamp.ToLocalTime().ToString("dd.MM.yyyy HH:mm:ss")</MudTd>
        <MudTd>@context.Land</MudTd>
        <MudTd>@context.TSC</MudTd>
        <MudTd>@context.Status</MudTd>
        <MudTd>@context.RowCount</MudTd>
        <MudTd>@($"{context.DurationSeconds:F1}s")</MudTd>
        <MudTd>@context.ErrorMessage</MudTd>
        <MudTd>@context.FileName</MudTd>
    </RowTemplate>
</MudTable>

@code {
    private List<ExportLog> logs = [];
    private string filterLand = string.Empty;
    private string filterStatus = string.Empty;
    private DateTime? filterFromDate;
    private int deleteOlderThanDays = 30;

    protected override async Task OnInitializedAsync() => await LoadAsync();

    private async Task LoadAsync()
    {
        await using var db = await DbFactory.CreateDbContextAsync();
        var query = db.ExportLogs.AsQueryable();

        if (!string.IsNullOrWhiteSpace(filterLand))
        {
            query = query.Where(x => x.Land.Contains(filterLand));
        }

        if (!string.IsNullOrWhiteSpace(filterStatus))
        {
            query = query.Where(x => x.Status == filterStatus);
        }

        if (filterFromDate.HasValue)
        {
            var fromUtc = filterFromDate.Value.Date.ToUniversalTime();
            query = query.Where(x => x.Timestamp >= fromUtc);
        }

        logs = await query.OrderByDescending(x => x.Timestamp).ToListAsync();
    }

    private string GetRowClass(ExportLog log, int _) => log.Status == "Error" ? "mud-theme-error" : string.Empty;

    private async Task DeleteOlderAsync()
    {
        var threshold = DateTime.UtcNow.AddDays(-deleteOlderThanDays);
        await using var db = await DbFactory.CreateDbContextAsync();
        var oldLogs = await db.ExportLogs.Where(x => x.Timestamp < threshold).ToListAsync();
        db.ExportLogs.RemoveRange(oldLogs);
        await db.SaveChangesAsync();
        await LoadAsync();
    }
}