# -*- coding: utf-8 -*-

require 'mui/cairo_timeline'
require 'mui/gtk_dark_matter_prification'
require 'mui/gtk_tree_view_pretty_scroll'

require 'gtk3'

class Gtk::TimeLine::InnerTL < Gtk::CompatListView

  include Gtk::TreeViewPrettyScroll
  include Gtk::InnerTLDarkMatterPurification

  attr_writer :force_retrieve_in_reply_to
  attr_accessor :postbox, :imaginary
  type_register('GtkInnerTL')

  # TLの値を返すときに使う
  Record = Data.define(:uri, :message, :order, :miracle_painter)

  URI = 0
  MESSAGE = 1
  ORDER = 2
  MIRACLE_PAINTER = 3

  def self.current_tl
    ctl = @@current_tl and @@current_tl.toplevel.focus.get_ancestor(Gtk::TimeLine::InnerTL) rescue nil
    ctl if(ctl.is_a?(Gtk::TimeLine::InnerTL) and not ctl.destroyed?)
  end

  # ==== Args
  # [from] 設定値を引き継ぐ元のInnerTL
  def initialize(from = nil)
    super()
    @force_retrieve_in_reply_to = :auto
    @@current_tl ||= self
    @iter_dict = {} # String: Gdk::TreeIter
    @order = ->(m) { m.modified.to_i }
    self.name = 'timeline'
    set_headers_visible(false)
    set_enable_search(false)
    last_geo = nil
    selection.mode = Gtk::SELECTION_MULTIPLE
    get_column(0).set_sizing(Gtk::TreeViewColumn::AUTOSIZE)
    extend(from) if from
    set_events end

  def cell_renderer_message
    @cell_renderer_message ||= Gtk::CellRendererMessage.new
  end

  def column_schemer
    [ {:renderer => lambda{ |x,y|
          cell_renderer_message.tree = self
          cell_renderer_message
        },
        :kind => :uri, :widget => :text, :type => String, :label => ''},
      {:kind => :text, :widget => :text, :type => Diva::Model},
      {:kind => :text, :type => Integer},
      {:kind => :text, :type => Object}
    ].freeze
  end

  def get_order(m)
    @order.call(m) end

  # レコードの並び順を決めるブロックを登録する。ブロックは一つの Message を受け取り、数値を返す
  # ==== Args
  # [&block] 並び順を決めるブロック
  # ==== Return
  # self
  def set_order(&block)
    @order = block end

  def menu_pop(widget, event)
  end

  def handle_row_activated
  end

  def create_postbox(options, &block)
    options = options.dup
    options[:before_post_hook] = ->(this) {
      get_ancestor(Gtk::Window).set_focus(self) unless self.destroyed? }
    pb = Gtk::PostBox.new(**options).show_all
    postbox.pack_start(pb, expand: false)
    pb.on_delete(&block) if block
    get_ancestor(Gtk::Window).set_focus(pb.post)
    pb end
  private :create_postbox

  def reply(options = {})
    ctl = Gtk::TimeLine::InnerTL.current_tl
    pb = nil
    if ctl
      pb = create_postbox(options)
      ctl.selection.unselect_all end
    pb end

  def postbox_delegation_generator(i_timeline)
    ->(params) {
      i_timeline.create_postbox(params) } end
  private :postbox_delegation_generator

  def add_postbox(i_postbox)
    # ずっと表示される（投稿しても消えない）PostBoxの処理
    # 既にprocっぽいものが入っているときはそのままにしておく
    options = i_postbox.options.dup
    if options[:delegate_other] && !options[:delegate_other].respond_to?(:to_proc)
      i_timeline = i_postbox.ancestor_of(Plugin::GUI::Timeline)
      options[:delegate_other] = postbox_delegation_generator(i_timeline)
      options[:postboxstorage] = postbox end
    create_postbox(options) end

  def get_active_messages
    get_active_iterators.map{ |iter| iter[1] } end

  def get_active_iterators
    selected = []
    if not destroyed?
      selection.selected_each{ |model, path, iter|
        selected << iter } end
    selected end

  def get_active_pathes
    selected = []
    if not destroyed?
      selection.selected_each{ |model, path, iter|
        selected << path } end
    selected end

  # _message_ のレコードの _column_ 番目のカラムの値を _value_ にセットする。
  # 成功したら _value_ を返す
  def update!(message, column, value)
    iter = get_iter_by_message(message)
    if iter
      iter[column] = value
      # 更新の結果、高さが変わる可能性がある
      iter[MIRACLE_PAINTER].reset_height
      value end end

  # タイムラインの内容を全て削除する
  # ==== Return
  # self
  def clear
    deleted = @iter_dict
    @iter_dict = {}
    deleted.values.each{ |iter| iter[MIRACLE_PAINTER].destroy }
    model.clear end

  # _path_ からレコードを取得する。なければnilを返す。
  def get_record(path)
    iter = model.get_iter(path)
    if iter
      Record.new(iter[0], iter[1], iter[2], iter[3]) end end

  # _message_ に対応する Gtk::TreePath を返す。なければnilを返す。
  def get_path_by_message(message)
    get_path_and_iter_by_message(message)[1] end

  # _message_ に対応する値の構造体を返す。なければnilを返す。
  def get_record_by_message(message)
    get_record_by_uri(message.uri.to_s) end

  # _message_ に対応する値の構造体を返す。なければnilを返す。
  def get_record_by_uri(uri)
    path = get_path_and_iter_by_uri(uri)[1]
    if path
      get_record(path) end end

  def force_retrieve_in_reply_to
    if(:auto == @force_retrieve_in_reply_to)
      UserConfig[:retrieve_force_mumbleparent]
    else
      @force_retrieve_in_reply_to end end

  # _message_ が含まれているかを返す
  # ==== Args
  # [message] Message タイムラインに含まれているかどうかを確認するMessage
  # ==== Return
  # 含まれていれば真
  def include?(message)
    @iter_dict.has_key?(message.uri.to_s) end

  # Gtk::TreeIterの対を再利用できるように登録しておく
  # ==== Args
  # [iter] Gtk::TreeIter
  # ==== Return
  # self
  def set_iter_dict(iter)
    uri = iter[URI]
    if not @iter_dict.has_key?(uri)
      @iter_dict[uri] = iter
      iters = @iter_dict
      iter[MIRACLE_PAINTER].signal_connect(:destroy) {
        iters.delete(uri)
        false } end
    self end


  # 別の InnerTL が自分をextend()した時に呼ばれる
  def extended
    if @destroy_child_miraclepainters and signal_handler_is_connected?(@destroy_child_miraclepainters)
      signal_handler_disconnect(@destroy_child_miraclepainters) end end

  private

  # self に _from_ の内容をコピーする
  # ==== Args
  # [from] InnerTL
  # ==== Return
  # self
  def extend(from)
    @force_retrieve_in_reply_to = from.instance_eval{ @force_retrieve_in_reply_to }
    @imaginary = from.imaginary
    from.extended
    from.model.each{ |from_model, from_path, from_iter|
      iter = model.append
      iter[URI] = from_iter[URI]
      iter[MESSAGE] = from_iter[MESSAGE]
      iter[ORDER] = from_iter[ORDER]
      iter[MIRACLE_PAINTER] = from_iter[MIRACLE_PAINTER].set_tree(self)
      set_iter_dict(iter) }
    self
  end

  def set_events
    @destroy_child_miraclepainters = signal_connect(:destroy) {
      model.each{ |m, p, iter|
        iter[MIRACLE_PAINTER].destroy }
    }
    signal_connect(:focus_in_event){
      @@current_tl.selection.unselect_all if not(@@current_tl.destroyed?) and @@current_tl and @@current_tl != self
      @@current_tl = self
      false } end

  # _message_ に対応する Gtk::TreeIter を返す。なければnilを返す。
  def get_iter_by_message(message)
    get_path_and_iter_by_message(message)[2] end

  # _message_ に対応する Gtk::TreeIter を返す。なければnilを返す。
  def get_iter_by_uri(uri)
    get_path_and_iter_by_uri(uri)[2] end

  # _message_ から [model, path, iter] の配列を返す。見つからなかった場合は空の配列を返す。
  def get_path_and_iter_by_message(message)
    get_path_and_iter_by_uri(message.uri.to_s) end

  def get_path_and_iter_by_uri(uri)
    uri = uri.to_s
    iter = @iter_dict[uri]
    if iter
      if iter[MIRACLE_PAINTER].destroyed?
        warn "destroyed miracle painter in cache (##{uri})"
        @iter_dict.delete(uri)
        []
      else
        [model, iter.path, iter] end
    else
      [] end end

end
