using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using QRCoder;
using LittleShop.Data;
using LittleShop.DTOs;
using LittleShop.Enums;

namespace LittleShop.Controllers;

public class BotDirectoryController : Controller
{
    private readonly LittleShopContext _context;
    private readonly ILogger<BotDirectoryController> _logger;

    public BotDirectoryController(LittleShopContext context, ILogger<BotDirectoryController> logger)
    {
        _context = context;
        _logger = logger;
    }

    // GET: /bots
    [HttpGet("/bots")]
    public async Task<IActionResult> Index()
    {
        var bots = await _context.Bots
            .Where(b => b.Status == BotStatus.Active && b.IsActive)
            .OrderBy(b => b.Name)
            .Select(b => new BotDirectoryDto
            {
                Id = b.Id,
                Name = b.Name,
                Description = b.Description,
                Type = b.Type.ToString(),
                PersonalityName = b.PersonalityName,
                TelegramUsername = b.Settings.Contains("\"telegram_username\":")
                    ? ExtractTelegramUsername(b.Settings)
                    : b.PlatformUsername,
                LastSeenAt = b.LastSeenAt,
                CreatedAt = b.CreatedAt
            })
            .ToListAsync();

        return View(bots);
    }

    // GET: /bots/qr/{id}
    [HttpGet("/bots/qr/{id}")]
    public async Task<IActionResult> GetQRCode(Guid id)
    {
        var bot = await _context.Bots
            .Where(b => b.Id == id && b.Status == BotStatus.Active)
            .FirstOrDefaultAsync();

        if (bot == null)
        {
            return NotFound();
        }

        // Extract Telegram username from settings JSON or use platform username
        string? telegramUsername = ExtractTelegramUsername(bot.Settings) ?? bot.PlatformUsername;

        if (string.IsNullOrEmpty(telegramUsername))
        {
            return NotFound("Bot does not have a Telegram username configured");
        }

        // Generate Telegram deep link
        string telegramUrl = $"https://t.me/{telegramUsername}";

        // Generate QR code
        using (QRCodeGenerator qrGenerator = new QRCodeGenerator())
        {
            QRCodeData qrCodeData = qrGenerator.CreateQrCode(telegramUrl, QRCodeGenerator.ECCLevel.Q);
            using (PngByteQRCode qrCode = new PngByteQRCode(qrCodeData))
            {
                byte[] qrCodeImage = qrCode.GetGraphic(20);
                return File(qrCodeImage, "image/png");
            }
        }
    }

    private static string? ExtractTelegramUsername(string settings)
    {
        try
        {
            var json = System.Text.Json.JsonDocument.Parse(settings);
            if (json.RootElement.TryGetProperty("telegram_username", out var username))
            {
                return username.GetString();
            }
        }
        catch
        {
            // JSON parsing failed
        }
        return null;
    }
}

public class BotDirectoryDto
{
    public Guid Id { get; set; }
    public string Name { get; set; } = string.Empty;
    public string Description { get; set; } = string.Empty;
    public string Type { get; set; } = string.Empty;
    public string PersonalityName { get; set; } = string.Empty;
    public string? TelegramUsername { get; set; }
    public DateTime? LastSeenAt { get; set; }
    public DateTime CreatedAt { get; set; }

    public string GetBadgeColor()
    {
        return Type.ToLower() switch
        {
            "sales" => "primary",
            "support" => "success",
            "marketing" => "warning",
            "technical" => "info",
            _ => "secondary"
        };
    }

    public string GetStatusBadge()
    {
        if (!LastSeenAt.HasValue)
            return "Never Connected";

        var timeSinceLastSeen = DateTime.UtcNow - LastSeenAt.Value;
        if (timeSinceLastSeen.TotalMinutes < 5)
            return "Online";
        else if (timeSinceLastSeen.TotalHours < 1)
            return "Recently Active";
        else if (timeSinceLastSeen.TotalDays < 1)
            return "Active Today";
        else
            return $"Last seen {timeSinceLastSeen.Days} days ago";
    }

    public string GetStatusColor()
    {
        if (!LastSeenAt.HasValue)
            return "secondary";

        var timeSinceLastSeen = DateTime.UtcNow - LastSeenAt.Value;
        if (timeSinceLastSeen.TotalMinutes < 5)
            return "success";
        else if (timeSinceLastSeen.TotalHours < 1)
            return "info";
        else
            return "secondary";
    }
}