using Bunit;
using Duempelkas.App.Components.Dialogs;
using Duempelkas.App.Services;
using Duempelkas.Domain.Enums;
using Xunit;

namespace Duempelkas.Tests;

public class CarryoverCorrectionTests
{
    [Fact]
    public async Task Correction_ShiftsAllYearsByDelta_AndRejectsStaleState()
    {
        using var f = new LedgerUiFixture();
        var accounts = f.Service<IAccountService>();
        var entries = f.Service<IEntryService>();
        var balances = f.Service<IBalanceQueryService>();
        await entries.CreateEntryAsync(1, EntryType.Income, new(2025, 1, 1), "Alt", 10m);
        await entries.CreateEntryAsync(1, EntryType.Expense, new(2026, 1, 1), "Neu", 5m);
        await accounts.CorrectCarryoverAsync(1, 120m, 2026, 110m, 100m);
        Assert.Equal(110m, (await accounts.GetAccountAsync(1)).CarryoverBalance);
        Assert.Equal(120m, (await balances.GetAccountBalanceAsync(1, 2025)).TotalBalance);
        Assert.Equal(115m, (await balances.GetAccountBalanceAsync(1, 2026)).TotalBalance);
        Assert.Equal(115m, (await balances.GetAccountBalanceAsync(1, 2027)).TotalBalance);
        Assert.Equal(2, (await entries.GetEntriesAsync(1, (int?)null)).Count);
        await Assert.ThrowsAsync<InvalidOperationException>(() => accounts.CorrectCarryoverAsync(1, 130m, 2026, 110m, 100m));
        var newAccount = await accounts.CreateAccountAsync("Neues Konto", -20m);
        Assert.Equal(-20m, newAccount.TotalBalance);
        Assert.Empty(await entries.GetEntriesAsync(newAccount.Id, (int?)null));
    }

    [Fact]
    public void CorrectionForm_ShowsBeforeAfter_AndRequiresAcknowledgement()
    {
        using var f = new LedgerUiFixture();
        var saved = 0m;
        var dialog = f.Context.Render<EditCarryoverDialog>(p => p.Add(x => x.CurrentAmount, 110m)
            .Add(x => x.InitialBalance, 100m).Add(x => x.Year, 2026).Add(x => x.AccountName, "Barkasse")
            .Add(x => x.OnSave, value => saved = value));
        Assert.Equal("110,00", dialog.Find("#carryover").GetAttribute("value"));
        dialog.Find("#carryover").Input("120,00");
        Assert.Equal("120,00", dialog.Find("#carryover").GetAttribute("value"));
        Assert.Contains("frühere und spätere Jahre", dialog.Markup);
        Assert.Contains("110,00", dialog.Find(".correction-preview").TextContent);
        Assert.True(dialog.Find("button.btn-success").HasAttribute("disabled"));
        dialog.Find("input[type=checkbox]").Change(true);
        dialog.Find("button.btn-success").Click();
        Assert.Equal(120m, saved);
    }
}