autoCrossbreed.lua

local gps = require("gps")
local action = require("action")
local database = require("database")
local scanner = require("scanner")
local posUtil = require("posUtil")
local config = require("config")

local lowestTier
local lowestTierSlot
local lowestStat
local lowestStatSlot

local function updateLowest()
    lowestTier = 64
    lowestTierSlot = 0
    lowestStat = 64
    lowestStatSlot = 0
    local farm = database.getFarm()

    local hasEmptySlot = false;
    -- pairs() is slower than numeric for due to function call overhead.
    -- Find lowestest tier slot.
    for slot=1, config.farmArea, 2 do
        local crop = farm[slot]
        if crop == nil then
            lowestTierSlot = slot;
            lowestStatSlot = slot;
            hasEmptySlot = true;
            break;
        end
        
        if crop.tier < lowestTier then
            lowestTier = crop.tier
            lowestTierSlot = slot
        end
    end

    if hasEmptySlot then
        return;
    end

    -- Find lowest stats slot among the lowest tier crops.
    for slot=1, config.farmArea, 2 do
        local crop = farm[slot]
        if crop ~= nil then
            if crop.tier == lowestTier then
                local stat = crop.gr+crop.ga-crop.re
                if stat < lowestStat then
                    lowestStat = stat
                    lowestStatSlot = slot
                end
            end
        end
    end
end

local function findSuitableFarmSlot(crop)
    -- if the return value > 0, then it's a valid crop slot
    -- if the return value == 0, then it's not a valid crop slot
    --     the caller may consider not to replace any crop.
    if crop.tier > lowestTier then
        return lowestTierSlot
    elseif crop.tier == lowestTier then
        if crop.gr+crop.ga-crop.re > lowestStat then
            return lowestStatSlot
        end
    end
    return 0
end

local function isWeed(crop)
    return crop.name == "weed" or 
        crop.name == "Grass" or
        crop.gr > 21 or 
        (crop.name == "venomilia" and crop.gr > 7);
end

local function checkOffspring(slot, crop)
    if crop.name == "air" then
        action.placeCropStick(2)
    elseif (not config.assumeNoBareStick) and crop.name == "crop" then
        action.placeCropStick()
    elseif crop.isCrop then
        if isWeed(crop) then
            action.deweed()
            action.placeCropStick()
        else
            if database.existInStorage(crop) then
                local suitableSlot = findSuitableFarmSlot(crop)
                if suitableSlot == 0 then
                    action.deweed()
                    action.placeCropStick()
                else
                    action.transplant(posUtil.farmToGlobal(slot), posUtil.farmToGlobal(suitableSlot))
                    action.placeCropStick(2)
                    database.updateFarm(suitableSlot, crop)
                    updateLowest()
                end
            else
                action.transplant(posUtil.farmToGlobal(slot), posUtil.storageToGlobal(database.nextStorageSlot()))
                action.placeCropStick(2)
                database.addToStorage(crop)
            end
        end
    end
end

--[[ 
    Parent crop can get destroied by weed. There is a need to deweed and replant.
 ]]
local function checkParent(slot, crop)
    if crop.isCrop and isWeed(crop) then
        action.deweed();
        database.updateFarm(slot, nil);
    end
end

local function breedOnce()
    for slot=1, config.farmArea, 1 do
        gps.go(posUtil.farmToGlobal(slot))
        local crop = scanner.scan()

        if (slot % 2 == 0) then
            checkOffspring(slot, crop);
        else
            checkParent(slot, crop);
        end
        
        if action.needCharge() then
            action.charge()
        end
    end
end

local function init()
    database.scanFarm()
    database.scanStorage()
    updateLowest()
    action.restockAll()
end

local function main()
    init()
    local breedRound = 0;
    while true do
        breedOnce();
        gps.go({0,0});
        action.restockAll();
        
        breedRound = breedRound + 1;
        if (config.maxBreedRound and breedRound > config.maxBreedRound) then
            print('Max round reached, end breeding.');
            break;
        end
        
        if #database.getStorage() >= config.storageFarmArea then
            print('Storage full, end breeding.');
            break;
        end
    end
end

main()