using System.Linq.Expressions;
using FastEndpoints;
using Hutopy.Web.Features.Contents.Data;
using Hutopy.Web.Features.Contents.Handlers.Models;
using Microsoft.EntityFrameworkCore;

namespace Hutopy.Web.Features.Contents.Handlers;

public sealed class GetContentsByCreatorRequest
{
    public Guid UserId { get; set; }
    [BindFrom("page_size")] public int PageSize { get; set; } = 10;
    [BindFrom("last_id")] public Guid? LastId { get; set; }
}

public class GetContentsByCreatorHandler(
    ContentDbContext context)
    : Endpoint<GetContentsByCreatorRequest, List<ContentModel>>
{
    public override void Configure()
    {
        Get("/api/contents/creator/{UserId:guid}");
        Options(o => o.WithTags("Contents"));
        AllowAnonymous();
    }

    public override async Task HandleAsync(
        GetContentsByCreatorRequest req,
        CancellationToken ct)
    {
        var query = context
            .Contents
            .Where(c => c.CreatedBy == req.UserId);

        query = query.OrderByDescending(c => c.CreatedAt);

        if (req.LastId is not null)
            query = query.Where(c => c.Id < req.LastId.Value);

        query = query.Take(req.PageSize);

        var posts = await query
            .Select(x => x.ToResponse())
            .ToListAsync(cancellationToken: ct);

        await SendAsync(posts, cancellation: ct);
    }
}