local robot = require("robot")
local component = require("component")
local term = require("term")
local event = require("event")
local keyboard = require("keyboard")

local det,mat = robot.detect()
local detDn,matDn = robot.detectDown()
local detUp,matUp = robot.detectUp()
local getSelect = robot.select()



function randTurn ()
    print("turning")
    if math.random(0,1)==0 then
        robot.turnRight()
    else
        robot.turnLeft()
    end
end

function checkGravity ()
    detDn,matDn = robot.detectDown()
    while detDn==false or matDn=="entity" do
        detDn,matDn = robot.detectDown()
        if matDn=="entity" then
            getSelect = robot.select()
            robot.select(16)
            component.inventory_controller.equip()
                while matDn=="entity" do
                    robot.swingDown()
                    detDn,matDn = robot.detectDown()
                end
            component.inventory_controller.equip()
            robot.select(getSelect)
        end
        robot.down()
        --detDn,matDn = robot.detectDown()
    end
    --check for entity below robot here?
end

function checkSteps ()
    getSelect = robot.select()
    robot.select(10)
    while robot.compare()==true do

        detUp,matUp = robot.detectUp()
        while matUp=="entity" do
            detUp,matUp = robot.detectUp()
            if matUp=="entity" then
                getSelect = robot.select()
                robot.select(16)
                component.inventory_controller.equip()
                    while matUp=="entity" do
                        robot.swingUp()
                        detUp,matUp = robot.detectUp()
                    end
                component.inventory_controller.equip()
                robot.select(getSelect)
            end
        end
        robot.up()
        robot.forward()
        --det,mat = robot.detect()
    end
    robot.select(getSelect)
end

function checkObstacle ()
    det,mat = robot.detect()
    getSelect = robot.select()
    if det==true then
        --if object detected in front of
        print("obstacle")
        if mat=="entity" then
            --attack goes here
            print("attacking")
            getSelect = robot.select()
            robot.select(16)
            component.inventory_controller.equip()
                while mat=="entity" do
                    robot.swing()
                    det,mat = robot.detect()
                end
            component.inventory_controller.equip()
            robot.select(getSelect)
        else
            --put in checks for mining or other actions here
        end
    robot.select(getSelect)
    end
end

function checkRedLine ()
    getSelect = robot.select()
    robot.select(11)
    if robot.compareDown()==true then
        --if on top of barrier line
        print("red line")
        robot.turnAround()
        --robot.select(11)
        while robot.compareDown()== true do
            checkObstacle()
            robot.forward()
            --checkGravity()
            checkSteps()
        end
    end
    robot.select(getSelect)
end

function randFwd (n)
    getSelect = robot.select()
    det,mat = robot.detect()
    --detDn,matDn = robot.detectDown()
    robot.select(11) -- red wool block
    while n>0 and det==false and robot.compareDown()==false do
        print(n .. " ")
        robot.forward()
        checkGravity()
        det,mat = robot.detect()
        n=n-1
    end
    checkSteps()
    checkGravity()
    robot.select(getSelect)
end


while true do
    os.sleep(.1)
    if keyboard.isKeyDown(keyboard.keys.w) and keyboard.isControlDown() then
        os.exit()
    end
    randFwd(math.random(1,12))
    checkGravity()
    checkObstacle()
    checkRedLine()
    randTurn()
end