using System.Reflection;
using DBConnection.Repositories.Interfaces;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace DBConnection.Extensions;

public static class BuilderExtensions
{
    /// <summary>
    /// Adds dbcontext and all repositories in repository namespace
    /// </summary>
    /// <param name="collection">service collection</param>
    /// <param name="config">configuration</param>
    public static void AddDbServices(this IServiceCollection collection, IConfiguration config)
    {
        string dbConnectionString = config.GetConnectionString("DefaultConnection");
        collection.AddDbContext<AppDbContext>(opt =>
        {
            opt.UseNpgsql(dbConnectionString);
        });
        Type[] repositories = Assembly.GetExecutingAssembly().GetTypes()
            .Where(t => t.IsClass && !t.IsAbstract && (t.Namespace?.Contains(nameof(DBConnection.Repositories)) ?? false) && typeof(IRepository).IsAssignableFrom(t)).ToArray();
        foreach (var repo in repositories)
        {
            var repoInterface = repo.GetInterfaces()
                .FirstOrDefault(repoInterface => typeof(IRepository).IsAssignableFrom(repoInterface) && repoInterface != typeof(IRepository));
            if (repoInterface != null)
            {
                collection.AddScoped(repoInterface, repo);
            }
            else
            {
                collection.AddScoped(repo);
            }
        }
        
    }
}