using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations.Schema;
using System.Reflection;
using System.Reflection.Emit;
using System.Text.Json;

namespace Emberend.Database;

public sealed class AppDbContext : DbContext
{
    public AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }
    public DbSet<User> Users => Set<User>();

    protected override void OnModelCreating(ModelBuilder model)
    {
        model.Entity<User>()
        .Property(u => u.Interests)
        .HasConversion(
            v => JsonSerializer.Serialize(v, (JsonSerializerOptions?)null),
            v => JsonSerializer.Deserialize<string[]>(v, (JsonSerializerOptions?)null) ?? Array.Empty<string>()
        );

        model.Entity<User>().HasKey(u => u.Id);
        model.Entity<User>().HasIndex(u => u.Email).IsUnique();
    }
}

public enum Gender : byte
{
    Unspecified = 0,
    Male = 1,
    Female = 2,
    Other = 3
}

public sealed class User
{
    public string Id { get; set; } = null!;

    public string Email { get; set; } = null!;

    public string Name { get; set; } = null!;
    public string Description { get; set; } = string.Empty;
    public string ProfilePicture { get; set; } = string.Empty;

    public DateOnly DateOfBirth { get; set; }
    public Gender Gender { get; set; } = Gender.Unspecified;

    public string[] Interests { get; set; } = Array.Empty<string>();


    public string PasswordHash { get; set; } = null!;
    public string Salt { get; set; } = null!;


    [NotMapped]
    public int Age =>
        DateTime.Today.Year - DateOfBirth.Year
        - (DateOfBirth.ToDateTime(TimeOnly.MinValue) > DateTime.Today ? 1 : 0);
}