`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company:
// Engineer:
//
// Create Date: 17.02.2020 23:53:27
// Design Name:
// Module Name: security_1
// Project Name:
// Target Devices:
// Tool Versions:
// Description:
//
// Dependencies:
//
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
//
//////////////////////////////////////////////////////////////////////////////////


module security_1(
    input clk,
    input reset,
    input [3:0] keypad,
    input front_door,
    input rear_door,
    input window,
    output reg alarm_siren,
    output reg is_armed,
    output reg is_wait_delay
    );

    //Define States
    localparam disarmed = 4'b0001;
    localparam armed = 4'b0010;
    localparam wait_delay = 4'b0100;
    localparam alarm = 4'b1000;

    //State Registers
    reg [3:0] curr_state, next_state;

    //Internal Signals
    wire [2:0] sensors;
    wire start_count;
    wire count_done;
    reg [7:0] delay_counter;

    assign sensors = {front_door, rear_door, window};

    //State Flip Flops
    always @ (posedge clk) begin
        if(reset)
            curr_state <= disarmed;
        else
            curr_state <= next_state;
    end

    always @ (curr_state, sensors, keypad, count_done) begin
        case (curr_state)
        disarmed: begin
            if(keypad == 4'b0011) begin
                //Set Outputs
                is_armed <= 1'b1;
                alarm_siren <= 1'b0;
                is_wait_delay <= 1'b0;
                //Set Next State
                next_state <= armed;
            end
            else begin
                //Set Outputs
                is_armed <= 1'b0;
                alarm_siren <= 1'b0;
                is_wait_delay <= 1'b0;
                //Set Next State
                next_state <= disarmed;
            end
        end
        armed: begin
            if(keypad == 4'b1100) begin
                //Set Outputs
                is_armed <= 1'b0;
                alarm_siren <= 1'b0;
                is_wait_delay <= 1'b0;
                //Set Next State
                next_state <= disarmed;
            end
            else if(sensors != 3'b000) begin
                //Set Outputs
                is_armed <= 1'b0;
                alarm_siren <= 1'b0;
                is_wait_delay <= 1'b1;
                //Set Next State
                next_state <= wait_delay;
            end
            else begin
                //Set Outputs
                is_armed <= 1'b1;
                alarm_siren <= 1'b0;
                is_wait_delay <= 1'b0;
                //Set Next State
                next_state <= armed;
            end
        end
        wait_delay: begin

        end
        alarm: begin

        end
        default: begin

        end
    end

endmodule