using FastEndpoints;
using Microsoft.EntityFrameworkCore;
using Socialize.Api.Data;
using Socialize.Api.Infrastructure.Security;
using Socialize.Api.Modules.Channels.Data;

namespace Socialize.Api.Modules.Channels.Handlers;

public record GetChannelsRequest(Guid? WorkspaceId);

public class GetChannelsHandler(
    AppDbContext dbContext,
    AccessScopeService accessScopeService)
    : Endpoint<GetChannelsRequest, IReadOnlyCollection<ChannelDto>>
{
    public override void Configure()
    {
        Get("/api/channels");
        Options(o => o.WithTags("Channels"));
    }

    public override async Task HandleAsync(GetChannelsRequest request, CancellationToken ct)
    {
        IQueryable<Channel> query = dbContext.Channels.AsQueryable();

        if (!accessScopeService.IsManager(User))
        {
            IReadOnlyCollection<Guid> workspaceScopeIds = await accessScopeService.GetAccessibleWorkspaceIdsAsync(User, ct);
            query = query.Where(channel => workspaceScopeIds.Contains(channel.WorkspaceId));
        }

        if (request.WorkspaceId.HasValue)
        {
            query = query.Where(channel => channel.WorkspaceId == request.WorkspaceId.Value);
        }

        List<ChannelDto> channels = await query
            .OrderBy(channel => channel.Network)
            .ThenBy(channel => channel.Name)
            .Select(channel => new ChannelDto(
                channel.Id,
                channel.WorkspaceId,
                channel.Name,
                channel.Network,
                channel.Handle,
                channel.ExternalUrl,
                channel.CreatedAt))
            .ToListAsync(ct);

        await SendOkAsync(channels, ct);
    }
}