# frozen_string_literal: true

class PlanLimits < ApplicationRecord
  include IgnorableColumns
  ignore_column :ci_max_artifact_size_running_container_scanning, remove_with: '14.3', remove_after: '2021-08-22'
  ignore_column :web_hook_calls_high, remove_with: '15.10', remove_after: '2022-02-22'
  ignore_column :ci_active_pipelines, remove_with: '16.3', remove_after: '2022-07-22'

  attribute :limits_history, :ind_jsonb, default: -> { {} }
  validates :limits_history, json_schema: { filename: 'plan_limits_history' }

  LimitUndefinedError = Class.new(StandardError)

  belongs_to :plan

  validates :notification_limit, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
  validates :enforcement_limit, numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  def exceeded?(limit_name, subject, alternate_limit: 0)
    limit = limit_for(limit_name, alternate_limit: alternate_limit)
    return false unless limit

    case subject
    when Integer
      subject >= limit
    when ActiveRecord::Relation
      # We intentionally not accept just plain ApplicationRecord classes to
      # enforce the subject to be scoped down to a relation first.
      #
      # subject.count >= limit value is slower than checking
      # if a record exists at the limit value - 1 position.
      subject.offset(limit - 1).exists?
    else
      raise ArgumentError, "#{subject.class} is not supported as a limit value"
    end
  end

  def limit_for(limit_name, alternate_limit: 0)
    limit = read_attribute(limit_name)
    raise LimitUndefinedError, "The limit `#{limit_name}` is undefined" if limit.nil?

    alternate_limit = alternate_limit.call if alternate_limit.respond_to?(:call)

    limits = [limit, alternate_limit]
    limits.map(&:to_i).select(&:positive?).min
  end

  # Overridden in EE
  def dashboard_storage_limit_enabled?
    false
  end

  def log_limits_changes(user, new_limits)
    new_limits.each do |attribute, value|
      limits_history[attribute] ||= []
      limits_history[attribute] << {
        user_id: user&.id,
        username: user&.username,
        timestamp: Time.current.utc.to_i,
        value: value
      }
    end

    update(limits_history: limits_history)
  end

  def limit_attribute_changes(attribute)
    limit_history = limits_history[attribute]
    return [] unless limit_history

    limit_history.map do |entry|
      {
        timestamp: entry[:timestamp],
        value: entry[:value],
        username: entry[:username],
        user_id: entry[:user_id]
      }
    end
  end
end

PlanLimits.prepend_mod_with('PlanLimits')