# Copyright (c) 2021 Andy Maleh
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

require 'glimmer/libui/control_proxy'
require 'glimmer/libui/control_proxy/area_proxy'
require 'glimmer/libui/parent'
require 'glimmer/libui/control_proxy/transformable'

module Glimmer
  module LibUI
    class ControlProxy
      # Proxy for LibUI text objects
      #
      # Follows the Proxy Design Pattern
      class TextProxy < ControlProxy
        include Parent
        prepend Transformable
      
        def initialize(keyword, parent, args, &block)
          @keyword = keyword
          @parent_proxy = parent
          @args = args
          @block = block
          post_add_content if @block.nil?
        end
      
        def post_add_content
          super
          if @parent_proxy.nil? && AreaProxy.current_area_draw_params
            draw(AreaProxy.current_area_draw_params)
            destroy
          end
        end
        
        def draw(area_draw_params)
          reset_attributed_string
          children.dup.each {|child| child.draw(area_draw_params)}
          build_control
          ::LibUI.draw_text(area_draw_params[:context], @libui, x, y)
          ::LibUI.draw_free_text_layout(@libui)
          ::LibUI.free_attributed_string(@attributed_string)
        end
        
        def destroy
          @parent_proxy&.children&.delete(self)
          ControlProxy.control_proxies.delete(self)
        end
        
        def redraw
          @parent_proxy&.queue_redraw_all
        end
        
        def x(value = nil)
          if value.nil?
            @x ||= args[0] || 0
          else
            @x = value
          end
        end
        alias x= x
        alias set_x x
        
        def y(value = nil)
          if value.nil?
            @y ||= args[1] || 0
          else
            @y = value
          end
        end
        alias y= y
        alias set_y y
        
        def width(value = nil)
          if value.nil?
            @width ||= args[2] || (AreaProxy.current_area_draw_params && AreaProxy.current_area_draw_params[:area_width])
          else
            @width = value
            redraw
          end
        end
        alias width= width
        alias set_width width
        
        def attributed_string
          @attributed_string ||= reset_attributed_string
        end
        
        def reset_attributed_string
          @attributed_string = ::LibUI.new_attributed_string('')
        end
        
        def default_font(value = nil)
          if value.nil?
            @default_font ||= {
              family: 'Helvetica',
              size: 12.0,
              weight: :normal,
              italic: :normal,
              stretch: :normal,
            }
          else
            @default_font = value
            redraw
          end
        end
        alias default_font= default_font
        alias set_default_font default_font
        
        def default_font_descriptor
          @default_font_descriptor ||= ::LibUI::FFI::FontDescriptor.malloc
          @default_font_descriptor.Family = default_font[:family] || 'Helvetica'
          @default_font_descriptor.Size = default_font[:size] || 12.0
          @default_font_descriptor.Weight = Glimmer::LibUI.enum_symbol_to_value(:text_weight, default_font[:weight], default_symbol: :normal)
          @default_font_descriptor.Italic = Glimmer::LibUI.enum_symbol_to_value(:text_italic, default_font[:italic], default_symbol: :normal)
          @default_font_descriptor.Stretch = Glimmer::LibUI.enum_symbol_to_value(:text_stretch, default_font[:stretch], default_symbol: :normal)
          @default_font_descriptor
        end
        
        def align(value = nil)
          if value.nil?
            @align
          else
            @align = value
            redraw
          end
        end
        alias align= align
        alias set_align align
        
        def draw_text_layout_params
          @draw_text_layout_params ||= ::LibUI::FFI::DrawTextLayoutParams.malloc
          @draw_text_layout_params.String = attributed_string
          @draw_text_layout_params.DefaultFont = default_font_descriptor
          @draw_text_layout_params.Width = width
          @draw_text_layout_params.Align = Glimmer::LibUI.enum_symbol_to_value(:draw_text_align, align, default_symbol: :left)
          @draw_text_layout_params
        end
        
        private
        
        def build_control
          @libui = ::LibUI.draw_new_text_layout(draw_text_layout_params)
        end
        
        def init_draw_brush(draw_brush, draw_brush_args)
          draw_brush.Type = Glimmer::LibUI.enum_symbol_to_value(:draw_brush_type, draw_brush_args[:type])
          draw_brush.R = (draw_brush_args[:r] || draw_brush_args[:red]).to_f / 255.0
          draw_brush.G = (draw_brush_args[:g] || draw_brush_args[:green]).to_f / 255.0
          draw_brush.B = (draw_brush_args[:b] || draw_brush_args[:blue]).to_f / 255.0
          draw_brush.A = (draw_brush_args[:a] || draw_brush_args[:alpha])
        end
      end
    end
  end
end