require "csv"

class Doctrine < ApplicationRecord
  has_many :doctrine_jurisprudences, dependent: :destroy
  has_many :jurisprudences, class_name: "Cdao::Jurisprudence", through: :doctrine_jurisprudences

  has_many :doctrine_subjects, dependent: :destroy
  has_many :subjects, through: :doctrine_subjects

  has_many :annotations, dependent: :destroy

  validates :content, presence: true

  before_validation do
    self.content_fingerprint = Digest::SHA256.hexdigest(content)
  end

  def doctrine_subjects
    DoctrineSubject.where(doctrine_id: self.id)
  end

  def jurisprudences
    Cdao::Jurisprudence.where(id: doctrine_jurisprudences.map(&:jurisprudence_id)).order(year: :desc, docdate: :desc)
  end

  def jurisprudence
    jurisprudences.first
  end

  def subjects
    Cdao::Subject.where(id: doctrine_subjects.map(&:subject_id))
  end

  def subject_ids
    subjects.map(&:id)
  end

  def subject_ids=(ids)
    ids = ids.map(&:to_i)

    ids.each do |subject_id|
      record = DoctrineSubject.find_or_initialize_by(doctrine_id: self.id, subject_id: subject_id)

      next if record.persisted?

      record.save
    end

    DoctrineSubject.where(doctrine_id: self.id).each do |record|
      record.destroy unless ids.member?(record.subject_id)
    end

    subject_ids
  end

  def plain_content
    Sanitize.clean(content).strip
  end

  def self.parse_csv_file(parent_id, path)
    ::CSV.foreach(path).each_with_index do |data, index|
      row_no = index + 1

      subject_name = data[0].strip
      headnote = data[1].strip
      content = data[2].strip
      doc_url = data[6].strip
      
      next if [headnote, content, doc_url].any?(&:blank?)
      
      parent = Cdao::Subject.find(parent_id)
      subject = parent.descendants.find_or_initialize_by(name: subject_name)

      if subject.new_record?
        subject.save
        subject.library_ids = [27]
      end

      logger = Logger.new(Rails.root.join("log/import.doctrines.log"))

      if subject.blank?
        logger.info "[#{row_no}] - no subject found"

        next
      end

      subject_id = subject.id
      doc_id = doc_url.split("?").first.split("/").map(&:strip).last

      record = self.find_or_initialize_by(headnote: headnote, content: ["<div>", content, "</div>"].join)

      if record.save
        record.doctrine_subjects.find_or_create_by(subject_id: subject_id)
        record.doctrine_jurisprudences.find_or_create_by(jurisprudence_id: doc_id)
      else
        logger.info "[#{row_no}] - failed to save #{record.errors.inspect}"
      end
    end
  end

  def self.parse_csv_file_new(parent_id, path)
    ::CSV.foreach(path).each_with_index do |data, index|
      row_no = index + 1

      subject_name = data[0].strip
      headnote = ""
      content = data[1].strip
      doc_url = data[8].strip

      # Annotations
      annomark_name = (data[2] || "").strip
      editor_note = (data[4] || "").strip
      phil_rep = ""
      doc_urls = (data[5] || "").strip.split("citing").map(&:strip)
      if doc_urls.present?
        anno_doc_url = doc_urls.first
        citing_doc_url = doc_urls.count > 1 ? doc_urls.last : ""
      end
      
      next if [content, doc_url].any?(&:blank?)
      
      parent = Cdao::Subject.find(parent_id)
      subject = parent.descendants.find_or_initialize_by(name: subject_name)

      if subject.new_record?
        subject.save
        subject.library_ids = [27]
      end

      logger = Logger.new(Rails.root.join("log/import.doctrines.log"))

      if subject.blank?
        logger.info "[#{row_no}] - no subject found"

        next
      end

      subject_id = subject.id
      doc_id = doc_url.split("?").first.split("/").map(&:strip).last
     
      if anno_doc_url.present?
        anno_doc_args = anno_doc_url.split("?").first.split("/").map(&:strip).last(2)
        anno_doc_type = anno_doc_args.first.classify
        anno_doc_id = anno_doc_args.last
        annotation_document = Cdao::Document.find_by(doc_type: anno_doc_type, doc_id: anno_doc_id)
      end

      if citing_doc_url.present?
        citing_doc_args = citing_doc_url.split("?").first.split("/").map(&:strip).last(2)
        citing_doc_type = citing_doc_args.first.classify
        citing_doc_id = citing_doc_args.last
        citing_document = Cdao::Document.find_by(doc_type: citing_doc_type, doc_id: citing_doc_id)
      end

      record = self.find_or_initialize_by(headnote: headnote, content: ["<div>", content, "</div>"].join)

      if record.save
        record.doctrine_subjects.find_or_create_by(subject_id: subject_id)
        record.doctrine_jurisprudences.find_or_create_by(jurisprudence_id: doc_id)
        
        # Annotations
        phil_rep = ""

        annomark = Annomark.find_by(name: annomark_name)
        annotation = record.annotations.new
        annotation.annomark_ids = [annomark.id] if annomark.present?
        annotation.document = annotation_document
        annotation.phil_rep = phil_rep || annotation_document.phil_rep
        annotation.editor_notes = editor_note
        if annotation.save
          annotation.add_document(citing_document) if citing_document.present?
        end
      else
        logger.info "[#{row_no}] - failed to save #{record.errors.inspect}"
      end
    end
  end

  searchable do 
    text :content

    integer :id

    integer :subject_ids, multiple: true

    integer :user_ids, multiple: true do
      paper_trail.originator.to_i
    end

    integer :search_year do
      jurisprudence.year.present? && jurisprudence.year > 0 ? jurisprudence.year : (jurisprudence.doc_date.try :year)
    end

    date :search_doc_date do 
      jurisprudence.doc_date.presence || Date.new(jurisprudence.year.presence || 0)
    end

    date :created_at

    string :headnote
  end
end