using Microsoft.AspNetCore.Mvc;
using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using WhatsappPromo.Core.Models;
using WhatsappPromo.Core.Services;

namespace WhatsappPromo.Worker.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class ConfigController : ControllerBase
    {
        private readonly IConfigService _configService;

        public ConfigController(IConfigService configService)
        {
            _configService = configService;
        }

        [HttpGet]
        public async Task<IActionResult> GetConfig()
        {
            var config = await _configService.GetConfigAsync();
            return Ok(config);
        }

        [HttpPost]
        public async Task<IActionResult> UpdateConfig([FromBody] SystemConfig config)
        {
             if (!string.IsNullOrEmpty(config.DownloadPath))
             {
                 try 
                 {
                     Directory.CreateDirectory(config.DownloadPath);
                 }
                 catch (Exception ex)
                 {
                     return BadRequest($"Ruta inválida: {ex.Message}");
                 }
             }

             await _configService.UpdateConfigAsync(config);
             return Ok(config);
        }

        [HttpPost("start")]
        public async Task<IActionResult> Start()
        {
             var config = await _configService.GetConfigAsync();
             config.IsActive = true;
             await _configService.UpdateConfigAsync(config);
             return Ok(new { status = "Starting" });
        }

        [HttpPost("stop")]
        public async Task<IActionResult> Stop()
        {
             var config = await _configService.GetConfigAsync();
             config.IsActive = false;
             await _configService.UpdateConfigAsync(config);
             return Ok(new { status = "Stopping" });
        }

        [System.Runtime.InteropServices.DllImport("user32.dll")]
        [return: System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.Bool)]
        private static extern bool SetForegroundWindow(IntPtr hWnd);

        [System.Runtime.InteropServices.DllImport("user32.dll")]
        private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);

        private static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);
        private const uint SWP_NOSIZE = 0x0001;
        private const uint SWP_NOMOVE = 0x0002;
        private const uint SWP_SHOWWINDOW = 0x0040;

        [HttpGet("browse")]
        public IActionResult Browse()
        {
            string? selectedPath = null;
            
            var thread = new Thread(() =>
            {
                using (var dummyForm = new Form())
                {
                    dummyForm.TopMost = true;
                    // El form debe ser "real" para que Windows lo respete
                    dummyForm.Width = 1; dummyForm.Height = 1;
                    dummyForm.Opacity = 0.05;
                    dummyForm.ShowInTaskbar = false;
                    dummyForm.FormBorderStyle = FormBorderStyle.None;
                    dummyForm.StartPosition = FormStartPosition.CenterScreen;
                    
                    dummyForm.Show();
                    
                    // Forzamos la posición al frente de todo
                    SetWindowPos(dummyForm.Handle, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);
                    SetForegroundWindow(dummyForm.Handle);
                    dummyForm.Activate();
                    dummyForm.Focus();

                    using (var fbd = new FolderBrowserDialog())
                    {
                        fbd.Description = "Selecciona la carpeta para descargas de WhatsApp";
                        fbd.UseDescriptionForTitle = true;
                        fbd.ShowNewFolderButton = true;
                        
                        if (fbd.ShowDialog(dummyForm) == DialogResult.OK)
                        {
                            selectedPath = fbd.SelectedPath;
                        }
                    }
                    dummyForm.Close();
                }
            });

            thread.SetApartmentState(ApartmentState.STA);
            thread.Start();
            thread.Join();

            return Ok(new { path = selectedPath });
        }
    }
}