using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Forms;

namespace ApplianceRepair.Components.Pages
{
    public static class RequestNumberGenerator
    {
        private static readonly char[] _chars = "ABCDEFGHJKLMNPQRSTUVWXYZ23456789".ToCharArray();

        public static string Generate(int length = 6)
        {
            var result = new char[length];
            // Use Random.Shared in .NET 6+ for thread safety
            for (int i = 0; i < length; i++)
            {
                result[i] = _chars[Random.Shared.Next(_chars.Length)];
            }
            return new string(result);
        }
    }

    public partial class Book(RepairRequestReader repairRequestReader, RepairRequestMediaReader repairRequestMediaReader) : ComponentBase
    {
        public RepairRequestModel Model = new();
        public List<IBrowserFile> SelectedFiles = new();
        public bool Complete = false;

        private void HandleFiles(InputFileChangeEventArgs e) => SelectedFiles.AddRange(e.GetMultipleFiles());

        private async Task HandleSubmit()
        {
            Model.RequestNumber = RequestNumberGenerator.Generate();
            Model.CreatedAt = DateTime.Now;
            Model.UpdatedAt = DateTime.Now;
            await repairRequestReader.AddRecord(Model);

            var imageUploadPath = Path.Combine(Environment.CurrentDirectory, "wwwroot", "uploads");
            if (!Directory.Exists(imageUploadPath)) Directory.CreateDirectory(imageUploadPath);

            foreach (var file in SelectedFiles)
            {
                try
                {
                    var trustedFileName = Path.GetRandomFileName() + Path.GetExtension(file.Name);
                    var path = Path.Combine(imageUploadPath, trustedFileName);

                    using var stream = file.OpenReadStream(maxAllowedSize: 1024 * 1024 * 10);
                    using var fileStream = new FileStream(path, FileMode.Create);

                    await stream.CopyToAsync(fileStream);

                    var mediaRecord = new RepairRequestMediaRecord()
                    {
                        CreatedAt = DateTime.Now,
                        UpdatedAt = DateTime.Now,
                        RequestNumber = Model.RequestNumber,
                        MediaPath = path,
                    };

                    await repairRequestMediaReader.AddRecord(mediaRecord);
                }
                catch (Exception ex)
                {
                    // probably need to show this to the user somehow, something prettier tho
                    Console.WriteLine($"File: {file.Name} Error: {ex.Message}");
                }
            }

            Complete = true;
        }
    }
}