-- This is the turtle client code.




-- Just some prerequisite stuff.
rednet.open("left")

-- Reading, or if needed, creating the position file.
function getPosition()
    if fs.exists("pos") == true then
        print("It exists, friend.")
        pos = fs.open("pos","r")
        -- taking advantage of the game's coordinate system
        x = pos.readLine()
        y = pos.readLine()
        z = pos.readLine()
        -- values are as following: 1, west. 2, north. 3, east. 4, south
        f = pos.readLine()
        pos.close()
    else
        -- Getting the input Coords.
        pos = fs.open("pos", "w")
        print("Insert the current X, Y, Z, and F (Direction facing value.) respectively.")
        print("Values for F are as following: 1.0 - west. 2.0 - north. 3.0 - east. 0.0 - south.")
        write("X: ")
        local inpX = read()
        write("Y: ")
        local inpY = read()
        write("Z: ")
        local inpZ = read()
        write("F: ")
        local inpF = read()

        -- Writing the input coords.
        pos.writeLine(inpX)
        pos.writeLine(inpY)
        pos.writeLine(inpZ)
        pos.writeLine(inpF)
        pos.close()
    end
end


function changeTurtle(func, var, var2)
    -- Both changing the position and writing the new one to the 'pos' file.

    -- exclusively for turning the turtle
    function turtleTurn(turnD)
    print("Beginning turtleturn function.")
        -- turnD is either 'l' or 'r', simply for left or right.
        getPosition()
        if f == "1.0" and turnD == "r" then

            turtle.turnRight()
            f = "2.0"
            fs.delete("pos")
            pos = fs.open("pos","a")
            pos.writeLine(x)
            pos.writeLine(y)
            pos.writeLine(z)
            pos.writeLine(f)
            pos.close()
            print("Written.")
        elseif f == "1.0" and turnD == "l" then

            turtle.turnLeft()
            f = "0.0"
            fs.delete("pos")
            pos = fs.open("pos","a")
            pos.writeLine(x)
            pos.writeLine(y)
            pos.writeLine(z)
            pos.writeLine(f)
            pos.close()
            print("Written.")
        elseif f == "0.0" and turnD == "r" then

            turtle.turnRight()
            f = "1.0"
            fs.delete("pos")
            pos = fs.open("pos","a")
            pos.writeLine(x)
            pos.writeLine(y)
            pos.writeLine(z)
            pos.writeLine(f)
            pos.close()
            print("Written.")

        elseif f == "0.0" and turnD == "l" then

            turtle.turnLeft()
            f = "3.0"
            fs.delete("pos")
            pos = fs.open("pos","a")
            pos.writeLine(x)
            pos.writeLine(y)
            pos.writeLine(z)
            pos.writeLine(f)
            pos.close()
            print("Written.")
        elseif f == "3.0" and turnD == "r" then

            turtle.turnRight()
            f = "0.0"
            fs.delete("pos")
            pos = fs.open("pos","a")
            pos.writeLine(x)
            pos.writeLine(y)
            pos.writeLine(z)
            pos.writeLine(f)
            pos.close()
            print("Written.")
        elseif f == "3.0" and turnD == "l" then

            turtle.turnLeft()
            f = "2.0"
            fs.delete("pos")
            pos = fs.open("pos","a")
            pos.writeLine(x)
            pos.writeLine(y)
            pos.writeLine(z)
            pos.writeLine(f)
            pos.close()
            print("Written.")
        elseif f == "2.0" and turnD == "r" then
            print("Haven't turned yet.")
            turtle.turnRight()
            print("Turning, deleting file.")
            f = "3.0"
            fs.delete("pos")
            pos = fs.open("pos","a")
            print("New File opened.")
            pos.writeLine(x)
            pos.writeLine(y)
            pos.writeLine(z)
            pos.writeLine(f)
            print("Written new coords.")
            pos.close()
            print("Closed.")
        elseif f == "2.0" and turnD == "l" then

            turtle.turnLeft()
            f = "1.0"
            fs.delete("pos")
            pos = fs.open("pos","a")
            pos.writeLine(x)
            pos.writeLine(y)
            pos.writeLine(z)
            pos.writeLine(f)
            pos.close()
            print("Written.")
        end
        end

        function turtleMove(dir, dist)
        if dir == "-x" then
            if f == "3.0" then
                for i = 1, dist do
                    turtle.goForward()
                end
            elseif f == "1.0" then
                turtleTurn("r")
                turtleTurn("r")
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "2.0" then
                turtleTurn("r")
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "0.0" then
                turtleTurn("l")
                for i = 1, dist do
                    turtle.forward()
                end
            end
        elseif dir == "+x" then
            if f == "1.0" then
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "2.0" then
                turtleTurn("l")
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "3.0" then
                turtleTurn("l")
                turtleTurn("l")
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "0.0" then
                turteTurn("r")
                for i = 1, dist do
                    turtle.forward()
                end
            end
        elseif dir == "-z" then
            if f == "2.0" then
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "3.0" then
                turtleTurn("l")
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "0.0" then
                turtleTurn("r")
                turtleTurn("r")
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "1.0" then
                turtleTurn("r")
                for i = 1, dist do
                    turtle.forward()
                end
            end
        elseif dir == "+z" then
            if f == "0.0" then
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "1.0" then
                turtleTurn("l")
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "3.0" then
                turtleTurn("r")
                for i = 1, dist do
                    turtle.forward()
                end
            elseif f == "2.0" then
                turtleTurn("l")
                turtleTurn("l")
                for i = 1, dist do
                    turtle.forward()
                end
            end
        end
    end

        if func == "tturn" then
            print("Did we even make it this far? Inside func if")
                turtleTurn(tostring(var))
        elseif func == "move" then
            print("Moving.")
            turtleMove(var, var2)
        end
    end

function figureOutTurn(newf)
    while f ~= newf do
    turtle.turnLeft()
    end
end


function recieveCall()
    print("Waiting for item dir")
    item = rednet.receive()
    print("Item dir received, it is "..item)
    sleep(0.2)
    print("Waiting for amount.")
    amount = rednet.receive()
    print("Amount is "..amount)
    itemnum = tonumber(item)
    amountnum = tonumber(amount)

    if itemnum ~= f then
        print("Turning for item.")
        figureOutTurn(itemnum)
        turtle.suck(amountnum)
    else
    turtle.suck(amountnum)
end
end

-- just some test calls
getPosition()
recieveCall()
sleep(1)