# frozen_string_literal: true

module Ezdoc
  class Document
    include Builder

    attr_reader :nodes, :styles

    def self.create(path, &block)
      doc = new
      block.call(doc)
      doc.save(path)
      doc
    end

    def initialize
      @nodes = []
      @format_stack = []
      @current_target = nil
      @current_list = nil
      @current_table = nil
      @current_row = nil
      @num_id_counter = 0
      @images = {}
      @styles = {}
      register_built_in_styles
    end

    def define_style(name, **properties)
      @styles[name] = Style.new(name, **properties)
    end

    def style(name)
      @styles[name]
    end

    def save(path)
      Package.new(self).save(path)
    end

    def lists
      @nodes.select { |n| n.is_a?(Nodes::List) }
    end

    def images
      @images.values
    end

    def register_image(path, width: nil, height: nil)
      return @images[path] if @images[path]

      rid = next_image_rid
      width_emu, height_emu = ImageDimensions.calculate_emus(path, width: width, height: height)
      image = Nodes::Image.new(path, rid: rid, width_emu: width_emu, height_emu: height_emu)
      @images[path] = image
      image
    end

    private

    def next_image_rid
      # rId1 = styles.xml (always present)
      # rId2 = numbering.xml (if lists present)
      # rId3+ = images
      base = lists.any? ? 3 : 2
      "rId#{base + @images.size}"
    end

    def register_built_in_styles
      # Headings (spacing_before ensures they're rendered as paragraph styles)
      define_style :heading1, size: 24, bold: true, spacing_before: 240, spacing_after: 120
      define_style :heading2, size: 18, bold: true, spacing_before: 200, spacing_after: 100
      define_style :heading3, size: 14, bold: true, spacing_before: 160, spacing_after: 80
      define_style :heading4, size: 12, bold: true, spacing_before: 120, spacing_after: 60
      define_style :heading5, size: 11, bold: true, italic: true, spacing_before: 100, spacing_after: 40
      define_style :heading6, size: 10, bold: true, italic: true, spacing_before: 80, spacing_after: 40

      # Other built-in styles
      define_style :title, size: 26, bold: true, align: :center
      define_style :subtitle, size: 15, italic: true, color: "666666"
      define_style :quote, italic: true, color: "666666", indent: 720
      define_style :code, font: "Courier New", size: 10
    end
  end
end