using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Nuuru.Server.Models;

namespace Nuuru.Server.Data
{
    public static class AnonymousUserSeeder
    {
        public static async Task EnsureAnonymousUserAsync(IServiceProvider services)
        {
            var context = services.GetRequiredService<ApplicationDbContext>();
            var userManager = services.GetRequiredService<UserManager<ApplicationUser>>();
            var logger = services.GetRequiredService<ILogger<ApplicationDbContext>>();

            // Check if any system account already exists
            var existingSystemAccount = await context.Users
                .AnyAsync(u => u.IsSystemAccount);

            if (existingSystemAccount)
            {
                logger.LogInformation("Anonymous system account already exists");
                return;
            }

            // Check if a user named "Chud" already exists (e.g. from Shimmie migration)
            var existingChud = await userManager.FindByNameAsync("Chud");
            if (existingChud != null)
            {
                existingChud.IsSystemAccount = true;
                await context.SaveChangesAsync();
                logger.LogInformation("Marked existing 'Chud' user as system account");
                return;
            }

            // Create the sentinel user
            var anonUser = new ApplicationUser
            {
                UserName = "Chud",
                IsSystemAccount = true,
                LockoutEnabled = false,
                EmailConfirmed = true,
                Status = string.Empty,
                Biography = string.Empty,
                SecurityStamp = Guid.NewGuid().ToString()
            };

            var result = await userManager.CreateAsync(anonUser);
            if (result.Succeeded)
            {
                logger.LogInformation("Created anonymous system account 'Chud'");
            }
            else
            {
                logger.LogError("Failed to create anonymous system account: {Errors}",
                    string.Join(", ", result.Errors.Select(e => e.Description)));
            }
        }
    }
}