using Microsoft.AspNetCore.Mvc;
using System.Text;
using System.Xml.Linq;
using BCards.Web.Services;
using BCards.Web.Areas.Tutoriais.Services;
using BCards.Web.Repositories;

namespace BCards.Web.Controllers;

public class SitemapController : Controller
{
    private readonly IUserPageService _userPageService;
    private readonly ILivePageService _livePageService;
    private readonly IMarkdownService _markdownService;
    private readonly ICategoryRepository _categoryRepository;
    private readonly ILogger<SitemapController> _logger;

    public SitemapController(
        IUserPageService userPageService,
        ILivePageService livePageService,
        IMarkdownService markdownService,
        ICategoryRepository categoryRepository,
        ILogger<SitemapController> logger)
    {
        _userPageService = userPageService;
        _livePageService = livePageService;
        _markdownService = markdownService;
        _categoryRepository = categoryRepository;
        _logger = logger;
    }

    [Route("sitemap.xml")]
    [ResponseCache(Duration = 86400)] // Cache for 24 hours
    public async Task<IActionResult> Index()
    {
        try
        {
            XNamespace ns = "http://www.sitemaps.org/schemas/sitemap/0.9";

            var livePages = await _livePageService.GetAllActiveAsync();

            // Artigos
            var artigos = await _markdownService.GetAllArticlesAsync("Artigos", "pt-BR");

            // Tutoriais por categoria
            var categories = await _categoryRepository.GetAllActiveAsync();
            var tutorialUrls = new List<XElement>();
            foreach (var cat in categories)
            {
                var tutorials = await _markdownService.GetArticlesByCategoryAsync(cat.Slug, "pt-BR");
                foreach (var t in tutorials)
                {
                    tutorialUrls.Add(new XElement(ns + "url",
                        new XElement(ns + "loc", $"{Request.Scheme}://{Request.Host}/tutoriais/{cat.Slug}/{t.Slug}"),
                        new XElement(ns + "lastmod", t.LastMod.ToString("yyyy-MM-dd")),
                        new XElement(ns + "changefreq", "monthly"),
                        new XElement(ns + "priority", "0.7")
                    ));
                }
            }

            var dynamicUrls = livePages.Select(page =>
                new XElement(ns + "url",
                    new XElement(ns + "loc", $"{Request.Scheme}://{Request.Host}/page/{page.Category?.Replace(" ", "-")?.ToLower()}/{page.Slug}"),
                    new XElement(ns + "lastmod", page.LastSyncAt.ToString("yyyy-MM-dd")),
                    new XElement(ns + "changefreq", "weekly"),
                    new XElement(ns + "priority", "0.8")
                )
            ).ToList();

            var artigoUrls = artigos.Select(a =>
                new XElement(ns + "url",
                    new XElement(ns + "loc", $"{Request.Scheme}://{Request.Host}/artigos/{a.Slug}"),
                    new XElement(ns + "lastmod", a.LastMod.ToString("yyyy-MM-dd")),
                    new XElement(ns + "changefreq", "monthly"),
                    new XElement(ns + "priority", "0.7")
                )
            ).ToList();

            var sitemap = new XDocument(
                new XDeclaration("1.0", "utf-8", "yes"),
                new XElement(ns + "urlset",
                    new XElement(ns + "url",
                        new XElement(ns + "loc", $"{Request.Scheme}://{Request.Host}/"),
                        new XElement(ns + "lastmod", DateTime.UtcNow.ToString("yyyy-MM-dd")),
                        new XElement(ns + "changefreq", "daily"),
                        new XElement(ns + "priority", "1.0")
                    ),
                    new XElement(ns + "url",
                        new XElement(ns + "loc", $"{Request.Scheme}://{Request.Host}/Home/Pricing"),
                        new XElement(ns + "lastmod", DateTime.UtcNow.ToString("yyyy-MM-dd")),
                        new XElement(ns + "changefreq", "weekly"),
                        new XElement(ns + "priority", "0.9")
                    ),
                    new XElement(ns + "url",
                        new XElement(ns + "loc", $"{Request.Scheme}://{Request.Host}/artigos"),
                        new XElement(ns + "lastmod", DateTime.UtcNow.ToString("yyyy-MM-dd")),
                        new XElement(ns + "changefreq", "weekly"),
                        new XElement(ns + "priority", "0.8")
                    ),
                    new XElement(ns + "url",
                        new XElement(ns + "loc", $"{Request.Scheme}://{Request.Host}/tutoriais"),
                        new XElement(ns + "lastmod", DateTime.UtcNow.ToString("yyyy-MM-dd")),
                        new XElement(ns + "changefreq", "weekly"),
                        new XElement(ns + "priority", "0.8")
                    ),
                    artigoUrls,
                    tutorialUrls,
                    dynamicUrls
                )
            );

            _logger.LogInformation("Generated sitemap with {LivePages} live pages, {Artigos} artigos, {Tutoriais} tutoriais",
                livePages.Count, artigos.Count, tutorialUrls.Count);

            return Content(sitemap.ToString(SaveOptions.DisableFormatting), "application/xml", Encoding.UTF8);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Error generating sitemap");
            return StatusCode(500, "Error generating sitemap");
        }
    }

    [Route("robots.txt")]
    [ResponseCache(Duration = 86400)] // Cache for 24 hours
    public IActionResult RobotsTxt()
    {
        var robotsTxt = $@"User-agent: *
Allow: /
Allow: /page/

Disallow: /Admin/
Disallow: /Auth/
Disallow: /Payment/
Disallow: /api/

Sitemap: {Request.Scheme}://{Request.Host}/sitemap.xml";

        return Content(robotsTxt, "text/plain", Encoding.UTF8);
    }
}