class User < ApplicationRecord
  has_secure_password validations: false

  has_many :sessions, dependent: :destroy
  has_many :matches_as_player1, class_name: "Match", foreign_key: :player1_id, dependent: :restrict_with_exception, inverse_of: :player1
  has_many :matches_as_player2, class_name: "Match", foreign_key: :player2_id, dependent: :restrict_with_exception, inverse_of: :player2
  has_one_attached :avatar

  normalizes :nickname, with: ->(n) { n.strip }

  validates :nickname, presence: true, uniqueness: { case_sensitive: false }, length: { minimum: 3, maximum: 24 }
  validates :rating, presence: true
  validates :password, presence: true, length: { minimum: 6 }, if: -> { new_record? || password_digest_changed? }
  validate :avatar_content_type, if: -> { avatar.attached? }

  # All matches of this user that have finished, newest first.
  def finished_matches
    Match.where("player1_id = :id OR player2_id = :id", id: id)
         .where.not(finished_at: nil)
         .order(finished_at: :desc)
  end

  private
    def avatar_content_type
      unless avatar.blob.content_type.in?(%w[image/png image/jpeg image/gif image/webp])
        errors.add(:avatar, "must be a PNG, JPEG, GIF or WebP image")
      end
    end
end