using FastEndpoints;
using Microsoft.EntityFrameworkCore;
using Socialize.Api.Data;
using Socialize.Api.Infrastructure.Security;
using Socialize.Api.Modules.Feedback.Contracts;
using Socialize.Api.Modules.Feedback.Data;
using Socialize.Api.Modules.Feedback.Services;

namespace Socialize.Api.Modules.Feedback.Handlers;

public record AddFeedbackCommentRequest(string Body);

public class AddFeedbackCommentRequestValidator
    : Validator<AddFeedbackCommentRequest>
{
    public AddFeedbackCommentRequestValidator()
    {
        RuleFor(x => x.Body).NotEmpty().MaximumLength(8000);
    }
}

public class AddMyFeedbackCommentHandler(
    AppDbContext dbContext,
    FeedbackNotificationService notificationService)
    : Endpoint<AddFeedbackCommentRequest, FeedbackTimelineItemDto>
{
    public override void Configure()
    {
        Post("/api/my-feedback/{id}/comments");
        Options(o => o.WithTags("Feedback"));
    }

    public override async Task HandleAsync(AddFeedbackCommentRequest request, CancellationToken ct)
    {
        Guid id = Route<Guid>("id");
        Guid reporterUserId = User.GetUserId();

        FeedbackReport? report = await dbContext.FeedbackReports.SingleOrDefaultAsync(candidate => candidate.Id == id, ct);

        if (report is null || !FeedbackAccessRules.CanReporterComment(report, reporterUserId))
        {
            await SendNotFoundAsync(ct);
            return;
        }

        DateTimeOffset now = DateTimeOffset.UtcNow;
        FeedbackComment comment = CreateComment(report.Id, reporterUserId, "Reporter", request.Body.Trim(), now);
        report.LastActivityAt = now;

        dbContext.FeedbackComments.Add(comment);
        await notificationService.AddReporterCommentNotificationsAsync(report, reporterUserId, ct);
        await dbContext.SaveChangesAsync(ct);

        await SendAsync(comment.ToTimelineDto(), StatusCodes.Status201Created, ct);
    }

    private FeedbackComment CreateComment(Guid reportId, Guid userId, string authorRole, string body, DateTimeOffset now)
    {
        return new FeedbackComment
        {
            Id = Guid.NewGuid(),
            FeedbackReportId = reportId,
            AuthorUserId = userId,
            AuthorDisplayName = User.GetAlias() ?? User.GetName(),
            AuthorEmail = User.GetEmail(),
            AuthorRole = authorRole,
            Body = body,
            CreatedAt = now,
        };
    }
}