farm seed robot

local robot = require("robot")
local component = require("component")
local sides = require("sides")
local inventory = component.inventory_controller

local HOE_NAME = "EMT:ElectricHoeGrowth"
local SEED_NAME = "minecraft:wheat_seeds"

local function equipItem(nameItem)
    if nameItem ~= nil then
        for i = 1, robot.inventorySize() do
            local item = inventory.getStackInInternalSlot(i)
            if item and item.name and item.name == nameItem then
                robot.select(i)
                inventory.equip()
            end
        end
    else
        robot.select(1)
    end
end

local function charge(indexItem)
    robot.turnAround()
    robot.select(indexItem)

    if(inventory.dropIntoSlot(sides.front, 1)) then
        print("charging electro item started")
        os.sleep(5)
        if(inventory.suckFromSlot(sides.front, 1)) then
            print("charging electro item finished")
            robot.turnAround()
        end
    end
end

local function findChargeItem(itemName)
    for i = 1, robot.inventorySize() do
        local item = inventory.getStackInInternalSlot(i)
        if item and item.name and item.name == itemName and item.charge <= 2000 then
            return charge(i)
        end
    end
end

local function plantSeed()
    equipItem(SEED_NAME)
    print("plant seed")
    os.sleep(0.1)

    robot.use()

    os.sleep(0.1)
end

local function growSeed()
    findChargeItem(HOE_NAME)

    equipItem(HOE_NAME)
    print("growth seed")

    os.sleep(0.1)
    for i = 1, 4 do
        robot.use()
    end
    os.sleep(0.1)
end

local function destroyWheat()
    print("destroy wheat")
    os.sleep(0.1)
    robot.swing()
    os.sleep(0.1)
end

local function dropItems()
    os.sleep(0.1)

    local activeSeed = false

    robot.turnRight()
    print("drop items")

    for i = 1, robot.inventorySize() do
        local item = inventory.getStackInInternalSlot(i)
        if item then
            if item.name and item.name == HOE_NAME then
                goto continue
            elseif item.label and item.name == SEED_NAME and activeSeed == false then
                activeSeed = true
                goto continue
            else
                for j = i, 20 do
                    robot.select(i)
                    inventory.dropIntoSlot(3, 1)
                end
            end
        end

        :: continue ::
    end
    robot.turnLeft()
end

while true do
    plantSeed()
    growSeed()
    destroyWheat()
    dropItems()
end