import {
  IsEmail,
  IsString,
  IsEnum,
  IsBoolean,
  IsOptional,
  MinLength,
  MaxLength,
  Matches,
} from 'class-validator';
import { UserRole } from '../entities';

interface UserEntity {
  id: string;
  email: string;
  username: string;
  role: UserRole;
  isActive: boolean;
  createdAt: Date;
  updatedAt: Date;
}

export class CreateUserDto {
  @IsEmail()
  email: string;

  @IsString()
  @MinLength(3)
  @MaxLength(30)
  @Matches(/^[a-zA-Z0-9_]+$/, {
    message: 'Username can only contain letters, numbers, and underscores',
  })
  username: string;

  @IsString()
  @MinLength(6)
  password: string;

  @IsEnum(UserRole)
  @IsOptional()
  role?: UserRole = UserRole.USER;

  @IsBoolean()
  @IsOptional()
  isActive?: boolean = true;
}

export class UpdateUserDto {
  @IsEmail()
  @IsOptional()
  email?: string;

  @IsString()
  @MinLength(3)
  @MaxLength(30)
  @Matches(/^[a-zA-Z0-9_]+$/, {
    message: 'Username can only contain letters, numbers, and underscores',
  })
  @IsOptional()
  username?: string;

  @IsString()
  @MinLength(6)
  @IsOptional()
  password?: string;

  @IsEnum(UserRole)
  @IsOptional()
  role?: UserRole;

  @IsBoolean()
  @IsOptional()
  isActive?: boolean;
}

export class LoginUserDto {
  @IsString()
  username: string;

  @IsString()
  password: string;
}

export class UserResponseDto {
  id: string;
  email: string;
  username: string;
  role: UserRole;
  isActive: boolean;
  createdAt: Date;
  updatedAt: Date;

  constructor(user: UserEntity) {
    this.id = user.id;
    this.email = user.email;
    this.username = user.username;
    this.role = user.role;
    this.isActive = user.isActive;
    this.createdAt = user.createdAt;
    this.updatedAt = user.updatedAt;
  }
}

export class ChangePasswordDto {
  @IsString()
  currentPassword: string;

  @IsString()
  @MinLength(6)
  newPassword: string;
}