module Search::Record::SQLite
  extend ActiveSupport::Concern

  included do
    self.table_name = "search_records"

    # Override the UUID id attribute from ApplicationRecord
    # SQLite uses integer auto-increment primary key (no default)
    attribute :id, :integer, default: nil

    after_save :upsert_to_fts5_table
    after_destroy :delete_from_fts5_table
  end

  class_methods do
    def for_account(account_id)
      # SQLite uses a single table, no sharding
      self
    end

    def matching_scope(query)
      # SQLite FTS5: join on rowid for fast lookup with native highlighting
      # Porter tokenizer handles stemming automatically
      joins("INNER JOIN search_records_fts ON search_records_fts.rowid = #{table_name}.id")
        .where("search_records_fts MATCH ?", query)
    end

    def search_scope(relation, query)
      # SQLite: matching scope already selected all columns + FTS5 highlight columns
      # Re-select to add query terms (ActiveRecord replaces the select list)
      opening_mark = Search::Highlighter::OPENING_MARK
      closing_mark = Search::Highlighter::CLOSING_MARK
      ellipsis = Search::Highlighter::ELIPSIS

      relation.select(
        "#{table_name}.id",
        "#{table_name}.account_id",
        "#{table_name}.searchable_type",
        "#{table_name}.searchable_id",
        "#{table_name}.card_id",
        "#{table_name}.board_id",
        "#{table_name}.title",
        "#{table_name}.content",
        "#{table_name}.created_at",
        "highlight(search_records_fts, 0, #{connection.quote(opening_mark)}, #{connection.quote(closing_mark)}) AS highlighted_title",
        "highlight(search_records_fts, 1, #{connection.quote(opening_mark)}, #{connection.quote(closing_mark)}) AS highlighted_content",
        "snippet(search_records_fts, 1, #{connection.quote(opening_mark)}, #{connection.quote(closing_mark)}, #{connection.quote(ellipsis)}, 20) AS content_snippet",
        "#{connection.quote(query.terms)} AS query"
      )
    end
  end

  def card_title
    if card_id
      # Use FTS5 native highlighting (already HTML-safe from FTS5)
      # Fall back to card.title if highlight is nil (e.g., for comment matches where title is NULL)
      if has_attribute?(:highlighted_title) && highlighted_title.present?
        highlighted_title.html_safe
      else
        card.title
      end
    end
  end

  def card_description
    if card_id && has_attribute?(:content_snippet) && content_snippet.present?
      # Use FTS5 native snippet for content (already HTML-safe from FTS5)
      content_snippet.html_safe
    end
  end

  def comment_body
    if comment && has_attribute?(:content_snippet) && content_snippet.present?
      # Use FTS5 native snippet for content (already HTML-safe from FTS5)
      content_snippet.html_safe
    end
  end

  private
    def upsert_to_fts5_table
      # Use raw unstemmed text - FTS5 Porter tokenizer handles stemming automatically
      # Note: FTS5 virtual tables don't work properly with bound parameters in SQLite,
      # so we need to use string interpolation with proper quoting
      self.class.connection.execute(
        "INSERT OR REPLACE INTO search_records_fts(rowid, title, content) VALUES (#{id}, #{self.class.connection.quote(title)}, #{self.class.connection.quote(content)})"
      )
    end

    def delete_from_fts5_table
      # Note: Use string interpolation for consistency (rowid is always an integer, so safe)
      self.class.connection.execute("DELETE FROM search_records_fts WHERE rowid = #{id}")
    end
end