Another bad mining program

local tArgs = {...}

local blackList = {} -- blacklisted items get thrown out with the checkInv function
local gps = {0, 0, 0, 0} --{X coord, Y coord, Z coord, rotation of turtle} all relative to starting position

--  Gets all of the items in a table
local function id()
    local tbl = {}
    for i=1,16 do
      tbl[i] = turtle.getItemDetail(i)
    end
    return tbl
end

--  this function will return a table with all of the details in all slots you can get a data of specific slot like this:
--local slot = someslot
--local item = itemDetail()
--print(item[slot])
local function frwd()
    while not turtle.forward() do
        turtle.dig()
    end
end

local function mine() -- Mines in a straight line / above and updates local GPS
    turtle.digUp()
    if gps[4] == 0 then
        gps[3] = gps[3] + 1
    else
        gps[3] = gps[3] - 1
    end
    frwd()
end

local function newX() -- changes rows for X coord
    turtle.digUp()
    if gps[4] == 0 then
        turtle.turnRight()
        frwd()
        turtle.turnRight()
        gps[4] = gps[4] + 180
        print("NewX, R: "..gps[4].." (back)")
    elseif gps[4] == 180 then
        turtle.turnLeft()
        frwd()
        turtle.turnLeft()
        gps[4] = 0
        print("NewX, R: "..gps[4].." (front)")
    end
    gps[1] = gps[1] + 1
    print("X: "..gps[1]..", Z: "..gps[3])
end


local function screenInv() -- checks inventory for blacklisted items and drops them
    local data = id()
    for i = 1, 16 do
        if data[i] and data[i].name == blacklist then
            turtle.select(i)
            turtle.dropDown()
        end
    end
end

local function resetPos() -- goes back to starting position. Does not change GPS
    for i = 1, gps[2] do
        while not turtle.down() do
            turtle.digDown()
        end
    end
    if gps[4] == 0 then
        for i = 1, gps[3] do
            turtle.back()
        end
        turtle.turnLeft()
        for i = 1, gps[1] do
            frwd()
        end
        turtle.turnRight()
    elseif gps[4] == 180 then
        for i = 1, gps[3] do
            frwd()
        end
        turtle.turnRight()
        for i = 1, gps[1] do
            frwd()
        end
        turtle.turnRight()
    else
        print("Error: rotation = "..gps[4])
    end
end

local function newY() -- goes up 2 blocks and changes rotation / Y value
    resetPos()
    gps[2] = gps[2] + 2
    for h = 1, gps[2] do
    turtle.digUp()
    turtle.up()
    end
--    turtle.turnLeft()
--    turtle.turnLeft()
--    gps[4] = gps[4] + 180
    if gps[4] >= 360 then
        gps[4] = gps[4] - 360
    end
    gps[1] = 0
    gps[3] = 0
    gps[4] = 0
    print("NewY, R: "..gps[4].." Y: "..gps[2])
end

local function resume() -- goes back to position before calling resetPos() function to resume mining
    if gps[4] == 0 then
        for i = 1, gps[3] do
            frwd()
        end
        turtle.turnRight()
        for i = 1, gps[1] do
            frwd()
        end
        turtle.turnLeft()
    elseif gps[4] == 180 then
        for i = 1, gps[3] do
            frwd()
        end
        turtle.turnRight()
        for i = 1, gps[1] do
            frwd()
        end
        turtle.turnRight()
    else
        print("Error: rotation = "..gps[4])
    end
    for i = 1, gps[2] do
        turtle.up()
    end
end

local function dump() --dumps inv
    for i = 2, 16 do
        turtle.select(i)
        turtle.dropDown()
    end
end

local function invFull() -- if the inventory is full (if there is a block is slot 16), go dump the inventory in the dump chest except for slot 1 which has fuel, then return to the previous position to work again
    turtle.select(16)
    local stack = turtle.getItemCount()
    print("Count in 16: "..stack)
    if stack ~= 0 then
        print("Dumping inventory..")
        resetPos()
        dump()
        print("resuming")
        resume()
    end
    turtle.select(1)
end

local function refuel() -- checks if fuel is below 5000. True = goes to slot 1 and refuels. If no fuel, spits out an error and goes to get more
    if turtle.getFuelLevel() < 5000 then
      turtle.select(1)
      turtle.refuel(10)
   end
end

--Main functions:
-- mine
-- invFull
-- screenInv
-- newX
-- newY
-- refuel

--Sub functions
-- resume
-- resetPos

--Main code:

for y = 1, tArgs[2] / 2 do
    refuel()
    for x = 1, tArgs[1] do
        for u = 1, tArgs[3] do
            mine()
        end
    --screenInv()
    newX()
    invFull()
    end
    if y ~= tArgs[2] / 2 then
        newY()
    end
end
resetPos()
dump()