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

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

        public HomeController(ILogger<HomeController> logger, AdDisplayService adDisplayService, IUserService userService, IConfiguration config, IStringLocalizer<QRRapidoApp.Resources.SharedResource> localizer)
        {
            _logger = logger;
            _adDisplayService = adDisplayService;
            _userService = userService;
            _config = config;
            _localizer = localizer;
        }

        public async Task<IActionResult> Index()
        {
            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);

            // SEO and Analytics data
            ViewBag.Title = _config["App:TaglinePT"];
            ViewBag.Keywords = _config["SEO:KeywordsPT"];
            ViewBag.Description = _localizer["QRGenerateDescription"];

            // User stats for logged in users
            if (!string.IsNullOrEmpty(userId))
            {
                ViewBag.DailyQRCount = await _userService.GetDailyQRCountAsync(userId);
                ViewBag.MonthlyQRCount = await _userService.GetQRCountThisMonthAsync(userId);
            }

            return View();
        }

        public IActionResult Privacy()
        {
            var userId = User?.FindFirst(ClaimTypes.NameIdentifier)?.Value;
            
            ViewBag.ShowAds = _adDisplayService.ShouldShowAds(userId).Result;
            ViewBag.IsPremium = _adDisplayService.HasValidPremiumSubscription(userId ?? "").Result;
            ViewBag.IsAuthenticated = User.Identity?.IsAuthenticated ?? false;
            ViewBag.UserName = User.Identity?.Name ?? "";
            
            ViewBag.Title = _localizer["PrivacyPolicyTitle"];
            ViewBag.Description = _localizer["PrivacyPolicyDescription"];
            _adDisplayService.SetViewBagAds(ViewBag);

            return View();
        }

        public IActionResult Terms()
        {
            var userId = User?.FindFirst(ClaimTypes.NameIdentifier)?.Value;
            
            ViewBag.ShowAds = _adDisplayService.ShouldShowAds(userId).Result;
            ViewBag.IsPremium = _adDisplayService.HasValidPremiumSubscription(userId ?? "").Result;
            ViewBag.IsAuthenticated = User.Identity?.IsAuthenticated ?? false;
            ViewBag.UserName = User.Identity?.Name ?? "";
            
            ViewBag.Title = _localizer["TermsOfUseTitle"];
            ViewBag.Description = _localizer["TermsOfUseDescription"];
            _adDisplayService.SetViewBagAds(ViewBag);

            return View();
        }

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }

        // Dynamic QR redirect endpoint
        [Route("d/{id}")]
        public async Task<IActionResult> DynamicRedirect(string id)
        {
            try
            {
                _adDisplayService.SetViewBagAds(ViewBag);
                // This would lookup the dynamic QR content from cache/database
                // For now, return a placeholder
                return Redirect("https://qrrapido.site");
            }
            catch
            {
                return NotFound();
            }
        }

        // Health check endpoint
        [Route("health")]
        public IActionResult Health()
        {
            return Ok(new { status = "healthy", timestamp = DateTime.UtcNow });
        }

        // Sitemap endpoint for SEO
        [Route("sitemap.xml")]
        public IActionResult Sitemap()
        {
            var sitemap = $@"<?xml version=""1.0"" encoding=""UTF-8""?>
                <urlset xmlns=""http://www.sitemaps.org/schemas/sitemap/0.9"">
                    <url>
                        <loc>https://qrrapido.site/</loc>
                        <lastmod>{DateTime.UtcNow:yyyy-MM-dd}</lastmod>
                        <changefreq>daily</changefreq>
                        <priority>1.0</priority>
                    </url>
                    <url>
                        <loc>https://qrrapido.site/pt/</loc>
                        <lastmod>{DateTime.UtcNow:yyyy-MM-dd}</lastmod>
                        <changefreq>daily</changefreq>
                        <priority>0.9</priority>
                    </url>
                    <url>
                        <loc>https://qrrapido.site/es/</loc>
                        <lastmod>{DateTime.UtcNow:yyyy-MM-dd}</lastmod>
                        <changefreq>daily</changefreq>
                        <priority>0.9</priority>
                    </url>
                    <url>
                        <loc>https://qrrapido.site/Premium/Upgrade</loc>
                        <lastmod>{DateTime.UtcNow:yyyy-MM-dd}</lastmod>
                        <changefreq>weekly</changefreq>
                        <priority>0.8</priority>
                    </url>
                    <url>
                        <loc>https://qrrapido.site/privacy</loc>
                        <lastmod>{DateTime.UtcNow:yyyy-MM-dd}</lastmod>
                        <changefreq>monthly</changefreq>
                        <priority>0.5</priority>
                    </url>
                    <url>
                        <loc>https://qrrapido.site/terms</loc>
                        <lastmod>{DateTime.UtcNow:yyyy-MM-dd}</lastmod>
                        <changefreq>monthly</changefreq>
                        <priority>0.5</priority>
                    </url>
                </urlset>";

            return Content(sitemap, "application/xml");
        }
    }

    public class ErrorViewModel
    {
        public string? RequestId { get; set; }
        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
    }
}