# frozen_string_literal: true

class StatusFilter
  attr_reader :status, :account

  def initialize(status, account, preloaded_relations = {})
    @status              = status
    @account             = account
    @preloaded_relations = preloaded_relations
  end

  def filtered?
    return false if !account.nil? && account.id == status.account_id
    return true if blocked_by_policy? || (account_present? && filtered_status?) || silenced_account?
    # filter non-op posts replying to something marked no replies
    non_self_reply? && reply_to_no_replies?
  end

  private

  def account_present?
    !account.nil?
  end

  def filtered_status?
    blocking_account? || blocking_domain? || muting_account? || filtered_reference?
  end

  def filtered_reference?
    # filter muted/blocked
    return true if account.user_hide_replies_of_blocked? && reply_to_blocked?
    return true if account.user_hide_replies_of_muted? && reply_to_muted?
    return true if account.user_hide_replies_of_blocker? && reply_to_blocker?

    # kajiht has no filters if status has no mentions
    return false if status&.mentions.blank?

    # Grab a list of account IDs mentioned in the status.
    mentioned_account_ids = status.mentions.pluck(:account_id)

    # Don't filter statuses mentioning you.
    return false if mentioned_account_ids.include?(account.id)

    return true if mentioned_account_ids.any? do |mentioned_account_id|
      return true if @preloaded_relations[:muting] && account.user_hide_mentions_of_muted? && @preloaded_relations[:muting][mentioned_account_id]
      return true if @preloaded_relations[:blocking] && account.user_hide_mentions_of_blocked? && @preloaded_relations[:blocking][mentioned_account_id]

      if @preloaded_relations[:blocked_by]
        return true if account.user_hide_mentions_of_blocker? && @preloaded_relations[:blocked_by][mentioned_account_id]
      else
        return true if account.user_hide_mentions_of_blocker? && Account.find(mentioned_account_id)&.blocking?(account.id)
      end

      return false unless status.private_visibility? && status.reply?
      @preloaded_relations[:following] && account.user_hide_mentions_outside_scope? && !@preloaded_relations[:following][mentioned_account_id]
    end

    return true if !@preloaded_relations[:following] && account.user_hide_mentions_outside_scope? && status.private_visibility? && status.reply? && (mentioned_account_ids - account.following_ids).any?
    return true if !@preloaded_relations[:muting] && account.user_hide_mentions_of_muted? && account.muting?(mentioned_account_ids)
    return true if !@preloaded_relations[:blocking] && account.user_hide_mentions_of_blocked? && account.blocking?(mentioned_account_ids)
  end

  def reply_to_blocked?
    @preloaded_relations[:blocking] ? @preloaded_relations[:blocking][status.in_reply_to_account_id] : account.blocking?(status.in_reply_to_account_id)
  end

  def reply_to_muted?
    @preloaded_relations[:muting] ? @preloaded_relations[:muting][status.in_reply_to_account_id] : account.muting?(status.in_reply_to_account_id)
  end

  def blocking_account?
    @preloaded_relations[:blocking] ? @preloaded_relations[:blocking][status.account_id] : account.blocking?(status.account_id)
  end

  def blocking_domain?
    @preloaded_relations[:domain_blocking_by_domain] ? @preloaded_relations[:domain_blocking_by_domain][status.account_domain] : account.domain_blocking?(status.account_domain)
  end

  def muting_account?
    @preloaded_relations[:muting] ? @preloaded_relations[:muting][status.account_id] : account.muting?(status.account_id)
  end

  def account_following_status_account?
    @preloaded_relations[:following] ? @preloaded_relations[:following][status.account_id] : account&.following?(status.account_id)
  end

  def reply_to_blocker?
    status.in_reply_to_account.present? && status.in_reply_to_account.blocking?(status.account_id)
  end

  def non_self_reply?
    status.reply? && status.in_reply_to_account_id != status.account_id
  end

  def reply_to_no_replies?
    parent_status = Status.find(status.in_reply_to_id)
    parent_status&.marked_no_replies? && !parent_status.mentions.pluck(:account_id).include?(status.account_id)
  end

  def silenced_account?
    !account&.silenced? && status_account_silenced? && !account_following_status_account?
  end

  def status_account_silenced?
    status.account.silenced?
  end

  def blocked_by_policy?
    !policy_allows_show?
  end

  def policy_allows_show?
    StatusPolicy.new(account, status, @preloaded_relations).show?
  end
end