using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Localization;
using QRRapidoApp.Services;
using System.Security.Claims;

namespace QRRapidoApp.Controllers
{
    public class TutoriaisController : Controller
    {
        private readonly IMarkdownService _markdownService;
        private readonly AdDisplayService _adDisplayService;
        private readonly ILogger<TutoriaisController> _logger;
        private readonly IStringLocalizer<QRRapidoApp.Resources.SharedResource> _localizer;
        private readonly IConfiguration _config;

        public TutoriaisController(
            IMarkdownService markdownService,
            AdDisplayService adDisplayService,
            ILogger<TutoriaisController> logger,
            IStringLocalizer<QRRapidoApp.Resources.SharedResource> localizer,
            IConfiguration config)
        {
            _markdownService = markdownService;
            _adDisplayService = adDisplayService;
            _logger = logger;
            _localizer = localizer;
            _config = config;
        }

        // Portuguese: /tutoriais/{slug} (canonical, no prefix)
        // Spanish: /es/tutoriais/{slug}
        // English: /en/tutoriais/{slug}
        [Route("tutoriais/{slug}")]
        [Route("es/tutoriais/{slug}")]
        [Route("en/tutoriais/{slug}")]
        public async Task<IActionResult> Article(string slug, string? culture = null)
        {
            try
            {
                // Determine culture from URL path if not provided
                var reqPath = Request.Path.Value ?? "";
                culture ??= reqPath.StartsWith("/es/", StringComparison.OrdinalIgnoreCase) ? "es"
                          : reqPath.StartsWith("/en/", StringComparison.OrdinalIgnoreCase) ? "en"
                          : "pt-BR";

                var article = await _markdownService.GetArticleAsync(slug, culture);

                if (article == null)
                {
                    _logger.LogWarning("Article not found: {Slug} ({Culture})", slug, culture);
                    return NotFound();
                }

                // Set ViewBag for ads and user info
                var userId = User?.FindFirst(ClaimTypes.NameIdentifier)?.Value;
                ViewBag.ShowAds = await _adDisplayService.ShouldShowAds(userId);
                ViewBag.IsPremium = await _adDisplayService.HasValidPremiumSubscription(userId ?? "");
                ViewBag.IsAuthenticated = User.Identity?.IsAuthenticated ?? false;
                ViewBag.UserName = User.Identity?.Name ?? "";
                _adDisplayService.SetViewBagAds(ViewBag);

                // Set SEO metadata from article
                ViewBag.Title = article.Metadata.Title;
                ViewBag.Description = article.Metadata.Description;
                ViewBag.Keywords = article.Metadata.Keywords;
                ViewBag.OgImage = article.Metadata.Image;
                ViewBag.OgType = "article";
                ViewBag.ArticleAuthor = article.Metadata.Author;
                ViewBag.ArticlePublishedTime = article.Metadata.Date.ToString("yyyy-MM-ddTHH:mm:ssZ");
                ViewBag.ArticleModifiedTime = article.Metadata.LastMod.ToString("yyyy-MM-ddTHH:mm:ssZ");
                ViewBag.Culture = culture;
                ViewBag.Slug = slug;

                // Get related articles (same culture, exclude current)
                var allArticles = await _markdownService.GetAllArticlesAsync(culture);
                article.RelatedArticles = allArticles
                    .Where(a => a.Title != article.Metadata.Title)
                    .Take(3)
                    .ToList();

                _logger.LogInformation("Serving article: {Slug} ({Culture})", slug, culture);
                return View(article);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error serving article: {Slug} ({Culture})", slug, culture);
                return StatusCode(500, "Internal server error");
            }
        }

        // Portuguese: /tutoriais (canonical, no prefix)
        // Spanish: /es/tutoriais
        // English: /en/tutoriais
        [Route("tutoriais")]
        [Route("es/tutoriais")]
        [Route("en/tutoriais")]
        public async Task<IActionResult> Index(string? culture = null)
        {
            try
            {
                // Determine culture from URL path if not provided
                var reqPath = Request.Path.Value ?? "";
                culture ??= reqPath.StartsWith("/es/", StringComparison.OrdinalIgnoreCase) ? "es"
                          : reqPath.StartsWith("/en/", StringComparison.OrdinalIgnoreCase) ? "en"
                          : "pt-BR";

                var articles = await _markdownService.GetAllArticlesAsync(culture);

                // Set ViewBag
                var userId = User?.FindFirst(ClaimTypes.NameIdentifier)?.Value;
                ViewBag.ShowAds = await _adDisplayService.ShouldShowAds(userId);
                ViewBag.IsPremium = await _adDisplayService.HasValidPremiumSubscription(userId ?? "");
                ViewBag.IsAuthenticated = User.Identity?.IsAuthenticated ?? false;
                ViewBag.UserName = User.Identity?.Name ?? "";
                _adDisplayService.SetViewBagAds(ViewBag);

                ViewBag.Title = culture == "pt-BR" ? "Tutoriais QR Code"
                              : culture == "en"   ? "QR Code Tutorials"
                              : "Tutoriales Código QR";
                ViewBag.Description = culture == "pt-BR"
                    ? "Aprenda a criar e usar QR Codes com nossos tutoriais completos"
                    : culture == "en"
                    ? "Learn how to create and use QR Codes with our complete step-by-step tutorials"
                    : "Aprende a crear y usar códigos QR con nuestros tutoriales completos";
                ViewBag.Culture = culture;

                _logger.LogInformation("Serving tutorials index ({Culture}): {Count} articles", culture, articles.Count);
                return View(articles);
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, "Error serving tutorials index ({Culture})", culture);
                return StatusCode(500, "Internal server error");
            }
        }
    }
}