`timescale 1ns / 1ps 
//////////////////////////////////////////////////////////////////////////////////
// Company:
// Engineer:
//
// Create Date: 01/05/2021 10:54:29 PM
// Design Name:
// Module Name: item_logic
// Project Name:
// Target Devices:
// Tool Versions:
// Description:
//
// Dependencies:
//
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
//
//////////////////////////////////////////////////////////////////////////////////


module item_logic(
           input clk,
           input clk_4Hz,
           input enable_reward,
           input enable_game_classic,
           input enable_game_infinity,
           input [ 10: 0 ] player1_tank_H,
           input [ 10: 0 ] player1_tank_V,
           input player1_tank_en,
           input [ 1: 0 ] player1_tank_dir,
           input [ 10: 0 ] player2_tank_H,
           input [ 10: 0 ] player2_tank_V,
           input [ 1: 0 ] player2_tank_dir,
           input player2_tank_en,
           input [ 10: 0 ] VGA_h,
           input [ 10: 0 ] VGA_V,
           input reset_n,

           output reg item_invincible,
           output reg item_addtime,
           output reg item_frozen,
           output reg item_addHP,
           output reg which_player,
           output [ 11: 0 ] VGA_data
       );

wire [ 1: 0 ] item_type;
wire [ 10: 0 ] random_xpos, random_ypos;
reg [ 31: 0 ] cnt_num;

wire	set_require;
reg	set_finish;

wire	[ 11: 0 ] VGA_data_information;
assign	VGA_data_reward = VGA_data_information;

initial begin
    cnt_num <= 0;
    item_invincible <= 0;
    item_addtime <= 0;
    item_frozen <= 0;
    item_addHP <= 0;
    which_player <= 0;
end

wire player1_tank_get, player1_tank_tmp;
wire player2_tank_get, player2_tank_tmp;
parameter TANK_WIDTH = 32;
parameter TANK_HEIGHT = 32;
parameter ITEM_WIDTH = 20;
parameter ITEM_HEIGHT = 20;
object_collide_detection tank1_item(
                             player1_tank_H, player1_tank_V, player1_tank_en, player1_tank_dir,
                             TANK_HEIGHT, TANK_WIDTH,
                             random_xpos, random_ypos, set_require , player1_tank_dir,
                             ITEM_HEIGHT, ITEM_WIDTH,
                             player1_tank_get, player1_tank_tmp
                         );


//player2 's tank
object_collide_detection tank2_item(
                             player2_tank_H, player2_tank_V, player2_tank_en, player2_tank_dir,
                             TANK_HEIGHT, TANK_WIDTH,
                             random_xpos, random_ypos, set_require , player1_tank_dir,
                             ITEM_HEIGHT, ITEM_WIDTH,
                             player2_tank_get, player2_tank_tmp
                         );


always @( posedge clk ) begin
    if ( enable_reward ) begin
        if ( player1_tank_get || player2_tank_get ) begin
            case ( item_type )
                1: begin
                    if ( enable_game_classic ) begin
                        item_addHP <= 1'b1;
                        which_player <= player2_tank_get;
                    end
                    if ( enable_game_infinity ) begin
                        item_addtime <= 1'b1;
                        which_player <= player2_tank_get;
                    end
                end
                2: begin
                    item_frozen <= 1'b1;
                    which_player <= player2_tank_get;
                end
                3: begin
                    item_invincible <= 1'b1;
                    which_player <= player2_tank_get;
                end
                default : begin
                    item_addHP <= 1'b0;
                    item_addtime <= 1'b0;
                    item_frozen <= 1'b0;
                    item_invincible <= 1'b0;
                end

            endcase
            set_finish <= 1'b1;
        end
        else begin
            set_finish <= 1'b0;
        end
        if ( item_invincible ) begin
            cnt <= cnt + 1;
            if ( cnt >= 500000000 ) begin
                item_invincible <= 1'b0;
                cnt <= 0;
            end
        end
        if ( item_addHP ) begin
            cnt <= cnt + 1;
            if ( cnt >= 5000 ) begin
                item_addHP <= 1'b0;
                cnt <= 0;
            end
        end
        if ( item_addtime ) begin
            cnt <= cnt + 1;
            if ( cnt >= 5000 ) begin
                item_addtime <= 1'b0;
                cnt <= 0;
            end
        end
        if ( item_frozen ) begin
            cnt <= cnt + 1;
            if ( cnt >= 300000000 ) begin
                item_frozen <= 1'b0;
                cnt <= 0;
            end
        end
    end
end

item_random_generator u_item_random_generator(

                      );
endmodule