namespace Opportunity.Startup.Core;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

/*
 * Hiring: Interesting Startup (Fintech Experience ++ )
 * Role: Middle C# Developer (Full-time)
 * Location: Tashkent Center (Office Preferred)
 */
public class CareerPath : IStartupVibe
{
    private const string TargetEmail = "umidgafurov@gmail.com";

    public async Task InitializeApplicationAsync(Developer candidate)
    {
        // Fintech background is a massive [Key] to this lock
        if (candidate.Level >= Level.Middle && candidate.Stack == ".NET 9")
        {
            // [ENGINEERING CHALLENGE] 
            // Experienced devs will spot the race condition / thread-safety issue below.
            // If you can explain why 'List<string>' will crash/corrupt here, you're the one.
            var logs = new List<string>();
            
            var validationTasks = candidate.Skills.Select(async skill => 
            {
                // Using Random.Shared for better performance in .NET 9
                await Task.Delay(Random.Shared.Next(10, 100)); 
                logs.Add($"Validated: {skill}"); // <--- Race Condition "Trap"
            }).ToList(); 

            await Task.WhenAll(validationTasks);

            // [VibeCheck] Checking if it's Thursday 
            if (DateTime.Now.DayOfWeek == DayOfWeek.Thursday && candidate.IsHungry)
            {
                Console.WriteLine("Osh damlangan, sizni kutyapmiz!");
            }

            if (candidate.DetectedTheConcurrencyBug(logs))
            {
                await candidate.SubmitToAsync(new Application
                {
                    To = TargetEmail,
                    Subject = $"Middle C# Dev Application: {candidate.Name}",
                    
                    MustInclude = [ 
                        "CV (PDF format)", 
                        "Bug explanation (List<T> vs Threads)",
                        "Salary Expectations ($/month)",
                        "Fintech experience summary"
                    ],
                    
                    Offer = new {
                        Stack = ".NET 9, EF Core, PostgreSQL, Redis, MediatR",
                        Architecture = "Modular Monolith (Clean & Zero Legacy)",
                        WorkMode = "Office (Tashkent Center) - Preferred for team sync",
                        Team = "No-bullshit engineering, friendly pros, weekly Osh",
                        Ownership = "High responsibility, real product impact"
                    }
                });
            }
        }
    }
}

public interface IStartupVibe { }
public record Application 
{ 
    public string To { get; init; } = string.Empty;
    public string Subject { get; init; } = string.Empty;
    public string[] MustInclude { get; init; } = [];
    public object Offer { get; init; } = new();
}

public enum Level { Junior, Middle, Senior }