_cadeMine.lua

local id, length = rednet.receive()
local id, width = rednet.receive()
local id, height = rednet.receive()

local l = tonumber(length) + 1
local w = tonumber(width)
local z0 = -58
local listtype = 0
local fin = tonumber(height)

-- set up variables

local x = 0
local y = 0
local z = 0
local rev = 1
local face = 0
local counter = 0
arr = {0} -- for trash removal
local cobble = false
local stone = false
local slot = 16
trashtable = {}
fuel = turtle.getItemDetail(16).name

-- define operational functions

function refuel() -- checks if bot needs fuel, and if it does uses internal items to refuel
    local f = false
    if turtle.getFuelLevel() < 500 then
        for i = 1,16 do
            fuelvar = false
            if not(turtle.getItemDetail(i) == nil) then
                if turtle.getItemDetail(i).name == fuel then
                    fuelvar = true
                end
            end
            if fuelvar then
                turtle.select(i)
                while turtle.getItemCount() > 0 do
                    turtle.refuel(1)
                    if turtle.getFuelLevel() >= 500 then
                        f = true
                        turtle.select(1)
                        break
                    end
                end
            end
            if f then break end
        end
    end
end

function moveForward() -- moves bot forward 1 block and updates position
    refuel()
    while not turtle.forward() do
        turtle.dig()
    end
    if face == 0 then y=y+1 end
    if face == 1 then x=x+1 end
    if face == 2 then y=y-1 end
    if face == 3 then x=x-1 end
end

function turn(num) -- turns bot either left (-1) or right (+1) depending on input and updates face value
    if num == 1 then
        turtle.turnRight()
        face = (face+1)%4
    elseif num == -1 then
        turtle.turnLeft()
        face = (face-1)%4
    end
end

function trashlist() -- generates white or black list depending on user input and stores block IDs in a table for reference | has some forge tags functionality for cobble and stone
    for i=1,15 do
        if turtle.getItemCount(i) > 0 then
            trashtable[i] = turtle.getItemDetail(i).name
            if trashtable[i] == "minecraft:cobblestone" then
                cobble = true
            end
            if trashtable[i] == "minecraft:stone" then
                stone = true
            end
        else
            slot = i
            break
        end
    end
    print("Item data saved")

    while face ~= 2 do turn(1) end
    for i=1,slot-1 do
        turtle.select(i)
        turtle.drop()
    end
    turn(-1)
    turn(-1)
    turtle.select(1)
end

function dispense() -- deposits mined items into chest behind where bot was initially placed. checks if bot needs fuel before dropping fuel into chest
    for i=1,15 do
        turtle.select(i)
        if not turtle.refuel(0) then
            turtle.drop()
        else turtle.transferTo(16) turtle.drop()
        end
    end
    turtle.select(1)
end

function goHome(state) -- returns bot to starting location and handles different reasons for returning. If state == mine the bot returns to its last location when mining
-- if bot returns because of a full inventory (state == full) then it will dispense items and then return to where it was in the quarry
-- if bot returns due to a lack of fuel (state == fuel) then it will prompt user to input more fuel and return once they have done so
-- if bot returns becuase it finished (state == comp) then it will face the starting direction and end the program
    print(state)
    xp = x
    yp = y
    zp = z
    facep = face
    while y > 0 do
        if face == 0 then turn(1) end
        if face == 1 then turn(1) end
        if face == 2 then moveForward() end
        if face == 3 then turn(-1) end
    end
    while x > 0 do
        if face == 0 then turn(-1) end
        if face == 1 then turn(-1) end
        if face == 2 then turn(1) end
        if face == 3 then moveForward() end
    end

    if(state == "full" or state == "fuel") then trashRemoval() end

    while z > 0 do
        turtle.up()
        z=z-1
    end
    while(face ~= 2) do turn(-1) end
    suc2,dat2 = turtle.inspect()
    if not suc2 then
        turn(-1)
        turn(-1)
        error()
    end
    while state == "fuel" do
        sleep(10)
        refuel()
        if turtle.getFuelLevel() >= 500 then state = "full" end -- set state to full instead of mine to dispense before returning
    end
    if state == "full" then
        dispense()
        arr = {0}
        state = "mine"
    end
    if state == "comp" then
        dispense()
        while face ~= 0 do turn(1) end
        error()
    end
    if state == "mine" then
        while z < zp do
            turtle.down() z = z+1
        end
        while x < xp do
            if face == 0 then turn(1) end
            if face == 1 then moveForward() end
            if face == 2 then turn(-1) end
            if face == 3 then turn(-1) end
        end
        while y < yp do
            if face == 0 then moveForward() end
            if face == 1 then turn(-1) end
            if face == 2 then turn(1) end
            if face == 3 then turn(1) end
        end
        while face ~= facep do
            turn(1)
        end
    end
end

function compare(dir) -- checks block depending on (dir) against the list generated by trashtable and returns whether or not it matches something on the list as tf
    local suc = true
    local dat = nil
    local tf = true
    if(listtype == 1) then
        tf = false
    end
    if dir == "up" then
        suc,dat = turtle.inspectUp()
    elseif dir == "front" then
        suc,dat = turtle.inspect()
    elseif dir == "down" then
        suc,dat = turtle.inspectDown()
    elseif dir == "in" then
        dat = turtle.getItemDetail()
    end
    if suc then
        for i=1,slot-1 do
            if trashtable[i] == dat.name or listtype == 1 and "minecraft:coal_ore" == dat.name then
                return tf
            end
            if cobble and dat.tags["forge:cobblestone"] or stone and dat.tags["forge:stone"] then
                return tf
            end
        end
    end
    return not(tf)
end


function digUp() -- mines block above bot if the bot is supposed to (it is on the whitelist or is not on the blacklist)
    if not compare("up") then
        while turtle.digUp() do
--          turtle.digUp()
        end
    end
end

function digDown() -- digUp but down
    if not compare("down") then
        while turtle.digDown() do
--          turtle.digDown()
        end
    end
end


function trashRemoval() -- removes internal items that either match against the blacklist or dont match against the whitelist (necessary becuase the bot has to mine unwanted blocks to move underground)
    for i=1,15 do
        if(arr[i+1] == nil) then
            local dispose = true
            for j=1,slot-1 do
                if turtle.getItemCount(i) > 0 then
                    if listtype == 0 then
                        if turtle.getItemDetail(i).name == trashtable[j] then
                            turtle.select(i)
                            turtle.drop()
                        elseif cobble or stone then
                            dat = turtle.getItemDetail(i,true)
                            if cobble and dat.tags["forge:cobblestone"] or stone and dat.tags["forge:stone"] then
                                turtle.select(i)
                                turtle.drop()
                            end
                        end
                    else
                        if turtle.getItemDetail(i).name == trashtable[j] then
                            dispose = false
                        elseif(turtle.getItemDetail(i).name == turtle.getItemDetail(16).name) then
                            turtle.select(i)
                            turtle.transferTo(16)
                            dispose = false
                        end
                    end
                end
            end
            if(listtype == 1 and dispose) then
                turtle.select(i)
                turtle.drop()
            end
            if(turtle.getItemCount(i) > 0) then
                arr[i+1] = 1
                arr[1] = arr[1]+1
            end
        end
    end
    turtle.select(1)
end

function isFull() -- checks if there is a free inventory space
    local ret = true
    for i=0,14 do
        if turtle.getItemCount(15-i) == 0 then ret = false break end
    end
    return ret
end

function checkfuel() -- refuels bot and then checks if there is enough fuel to make it back to the starting location and mine the next layer, returns for fuel if there is not
    refuel()
    if turtle.getFuelLevel() < (x+y+z)+l*w then
        goHome("fuel")
    end
end

function mine() -- checks for sufficient fuel every 16 operations then mines the block infront of the bot, moves forward, then mines the block above and below if it should
-- also checks for a full inventory and returns to drop off items if needed
    if counter%16 == 0 then checkfuel() counter = 1
    else counter = counter+1 end
    moveForward()
    digDown()
    digUp()
    if isFull() then
        trashRemoval()
        if arr[1] >= 14 then goHome("full") end
    end
end

function Bore() -- moves turtle to z = z0-3 (in case of uneven bedrock)
    while z < z0-3 do
        while not turtle.down() do turtle.digDown() end
        z = z+1
    end
end

function moveY() -- mines out a line while keeping track of location and facing
    if y == 0 then
        while y < l-1 do
            if face == 0 then
                mine()
            elseif face == 1 or face == 2 then
                turn(-1)
            else turn(1)
            end
        end
    else
        while y > 0 do
            if face == 2 then
                mine()
            elseif face == 1 or face == 0 then
                turn(1)
            else turn(-1)
            end
        end
    end
end

function quarry() -- uses moveY to mine out a square
    refuel()
    for i=0,w-1 do
        moveY()
        if(i < w-1) then
            if(i%2 == 0) then
                turn(rev)
            else
                turn(-rev)
            end
            mine()
        end
    end
end

function Mastermind() -- runs the other functions in the proper order to mine out the user defined area, returns once complete
    trashlist()
    refuel()
    if turtle.getFuelLevel() < 500 then
        print("Not enough fuel, please insert more fuel")
        while turtle.getFuelLevel() < 500 do
            sleep(5)
            refuel()
        end
    end
    print(z)
    Bore()
    print(fin)
    for i=0,fin-3 do
        print(i)
        if i%3 == 0 then
            turtle.digUp()
            quarry()
            if(w%2 == 0) then
                rev=0-rev
            end
            trashRemoval()
        end
        if i < fin-3 then
            while not turtle.up() do turtle.digUp() end
            z=z-1
        end
    end
    trashRemoval()
    print("Job's done")
    goHome("comp")

end

Mastermind() -- queue evil laughter

-- todo:
-- track checked items to increase trashRemoval speed especially when inventory is nearly full