-- Interactive Audio Manipulation Processor
--
-- file: ui.vhd
-- status: compiled - no errors, however, some functionality is stubbed out
--
-- author: Stephen Tang
--
-- This file contains the top-level user interface entity. This entity
-- is responsible for passing the user input to the audio manipulation
-- processes and to the VGA display

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;

library work;
use work.Constants_Pkg.all;

entity ui is
  port (
    clk : in std_logic;  --system clock, 25.175MHz; pin 91
    rst : in std_logic;  -- reset signal from pushbutton FLEX_PB1, pin 28
    SlowClk: in std_logic;
    vga_red, vga_green, vga_blue: out boolean; -- pins 236, 237, 238
    vga_h_sync,vga_v_sync : buffer boolean;-- pins 240 and 239
    Jup, Jdown, Jleft, Jright, Jfire: in std_logic;
    sound_x, sound_y: out std_logic_vector(SOURCE_WIDTH-1 downto 0)
  );
end ui;

architecture UserInterface of ui is
  
  component video is
    port (
      clock, reset : in std_logic;
      cursorX: in std_logic_vector(DISPLAY_X-1 downto 0);
      cursorY: in std_logic_vector(DISPLAY_Y-1 downto 0);
        -- current joystick cursor position
      vga_red, vga_green, vga_blue: out boolean;
      vga_h_sync,vga_v_sync : out boolean
    );
  end component;

  component joystick is
    port (
      clock : in std_logic; -- takes in vga_h_sync
      up, down, left, right, fire: in std_logic;
      X: out std_logic_vector(DISPLAY_X-1 downto 0);
      Y: out std_logic_vector(DISPLAY_Y-1 downto 0)    
    );
  end component;

  component AudioCoords is
    port (
      clock: in std_logic; -- should be 80ns
      screenX: in std_logic_vector(DISPLAY_X-1 downto 0);
      screenY: in std_logic_vector(DISPLAY_Y-1 downto 0);
      locationX: out std_logic_vector(SOURCE_WIDTH-1 downto 0);
      locationY: out std_logic_vector(SOURCE_WIDTH-1 downto 0)
    );
  end component;

  signal JoyX: std_logic_vector(DISPLAY_X-1 downto 0);     
  signal JoyY: std_logic_vector(DISPLAY_Y-1 downto 0);

  signal SoundSpriteX: std_logic_vector(DISPLAY_X-1 downto 0);
  signal SoundSpriteY: std_logic_vector(DISPLAY_Y-1 downto 0);  
  
  signal HSyncClock: std_logic;

begin -- UserInterface

  MakeHSyncIntoClock: process(vga_h_sync)
  begin
    case vga_h_sync is
      when TRUE =>
        HSyncClock <= '1';
      when FALSE =>
        HSyncClock <= '0';
    end case;
  end process MakeHSyncIntoClock;

  videocontrol: video port map (
    clock    => clk,
    reset    => rst,
    cursorX => JoyX,
    cursorY => JoyY,
    vga_red    => vga_red,
    vga_green  => vga_green,
    vga_blue   => vga_blue,
    vga_h_sync => vga_h_sync,
    vga_v_sync => vga_v_sync
  );

  Joy: Joystick port map (
    clock => HSyncClock,
    up    => Jup,
    down  => Jdown,
    left  => Jleft,
    right => Jright,
    fire  => Jfire,
    X     => JoyX,
    Y     => JoyY
  );

  SoundCoordsMapper: AudioCoords port map (
    clock     => SlowClk,
    screenX   => JoyX,
    screenY   => JoyY,
    locationX => sound_x,
    locationY => sound_y
  );

end UserInterface;