using Microsoft.EntityFrameworkCore;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Common.Messaging;
using PnvPanel.Application.Common.Models;

namespace PnvPanel.Application.Instructions;

public sealed class ListInstructionTabsQueryHandler(IAppDbContext dbContext)
    : IQueryHandler<ListInstructionTabsQuery, Result<IReadOnlyList<InstructionTabDto>>>
{
    public async Task<Result<IReadOnlyList<InstructionTabDto>>> Handle(
        ListInstructionTabsQuery query,
        CancellationToken cancellationToken
    )
    {
        var tabs = await dbContext
            .InstructionTabs.AsNoTracking()
            .OrderBy(t => t.SortOrder)
            .Select(t => new InstructionTabDto(
                t.Id,
                t.Title,
                t.Body,
                t.SortOrder,
                t.CreatedAt,
                t.UpdatedAt
            ))
            .ToListAsync(cancellationToken);

        return Result.Success<IReadOnlyList<InstructionTabDto>>(tabs);
    }
}