-- Manages an oregen facility

local STOCK_TICKER = ""
local EXPORT_STORAGE = ""
local SPEEDOMETER = ""

local CRUSHER_ADDR = "Crusher"
local MELTER_ADDR = "Melter"
local MIXER_ADDR = "Mixer"
local WASHER_ADDR = "Washer"
local SMELTER_ADDR = "Smelter"
local HAUNTER_ADDR = "Haunter"
local PRESS_ADDR = "Press"
local EXPORT_ADDR = "Output"

-- amount to keep in EXPORT_STORAGE
local KEEP_STOCKED = {
    ["minecraft:iron_nugget"] = 4 * 64,
    ["minecraft:gold_nugget"] = 4 * 64,
    ["create:zinc_nugget"] = 4 * 64,
    ["create:copper_nugget"] = 4 * 64,
    ["minecraft:netherrack"] = 4 * 64,
    ["create:cinder_flour"] = 0,
    ["minecraft:gravel"] = 0,
    ["minecraft:netherite_scrap"] = 4,
    ["minecraft:nether_bricks"] = 0,
    ["oreganized:silver_nugget"] = 4 * 64,
    ["tfmg:nickel_nugget"] = 4 * 64,
    ["tfmg:lithium_nugget"] = 64,
    ["tfmg:bauxite_powder"] = 4 * 64,
}

local GLOBAL_LIMS = {
    lower = 6 * 64,
    upper = 10 * 64,
}

local LIMIT_EXCEPTIONS = {
    ["create:cinder_flour"] = {
        lower = 64,
        upper = 2 * 64,
    },
    ["minecraft:gravel"] = {
        lower = 10 * 64,
        upper = 20 * 64,
    },
    ["minecraft:netherite_scrap"] = {
        lower = 0,
        upper = 4,
    },
    ["tfmg:lithium_nugget"] = {
        lower = -1,
        upper = 0,
    },
}

-- if these exist, they will be used up
local PRODUCTS = {
    {"create:crimsite", CRUSHER_ADDR},
    {"create:crushed_raw_iron", MELTER_ADDR},
    {"create:crushed_raw_zinc", MELTER_ADDR},
    {"create:asurine", CRUSHER_ADDR},
    {"create:crushed_raw_copper", MELTER_ADDR},
    {"create:veridium", CRUSHER_ADDR},
    {"create:ochrum", CRUSHER_ADDR},
    {"create:crushed_raw_gold", MELTER_ADDR},
    {"minecraft:sand", WASHER_ADDR},
    {"minecraft:clay_ball", SMELTER_ADDR},
    {"minecraft:brick", HAUNTER_ADDR},
    {"minecraft:flint", CRUSHER_ADDR},
    {"minecraft:nether_bricks", CRUSHER_ADDR},
    {"minecraft:basalt", CRUSHER_ADDR},
    {"create:crushed_raw_silver", WASHER_ADDR, 16},
    {"minecraft:calcite", CRUSHER_ADDR},
    {"create:crushed_raw_nickel", WASHER_ADDR, 32},
    {"tfmg:bauxite", CRUSHER_ADDR},
}

-- these will be crafted when needed
local RECIPES = {
    ["minecraft:gravel"] = {
        ingredients = {
            {"minecraft:cobblestone", 2 * 64},
        },
        addr = CRUSHER_ADDR,
        limit = 6,
    },
    ["minecraft:iron_nugget"] = {
        ingredients = {
            {"minecraft:iron_nugget", 60},
            {"minecraft:gravel", 24},
        },
        addr = PRESS_ADDR,
    },
    ["minecraft:gold_nugget"] = {
        ingredients = {
            {"minecraft:gold_nugget", 64},
            {"minecraft:gravel", 64},
        },
        addr = PRESS_ADDR,
    },
    ["create:zinc_nugget"] = {
        ingredients = {
            {"create:zinc_nugget", 64},
            {"minecraft:gravel", 32},
        },
        addr = PRESS_ADDR,
    },
    ["create:copper_nugget"] = {
        ingredients = {
            {"create:copper_nugget", 63},
            {"minecraft:gravel", 18},
        },
        addr = PRESS_ADDR,
    },
    ["minecraft:netherrack"] = {
        ingredients = {
            {"create:cinder_flour", 64},
            {"minecraft:cobblestone", 64},
        },
        addr = MIXER_ADDR,
    },
    ["create:cinder_flour"] = {
        ingredients = {
            {"minecraft:netherrack", 64}
        },
        addr = CRUSHER_ADDR,
    },
    ["minecraft:netherite_scrap"] = {
        ingredients = {
            {"minecraft:gravel", 2 * 64},
        },
        addr = CRUSHER_ADDR,
        limit = 6,
    },
    ["minecraft:nether_bricks"] = {
        ingredients = {
            {"minecraft:nether_brick", 64},
        },
        addr = PRESS_ADDR,
    },
    ["oreganized:silver_nugget"] = {
        ingredients = {
            {"oreganized:silver_nugget", 60},
            {"minecraft:gravel", 24},
        },
        addr = PRESS_ADDR,
    },
    ["tfmg:nickel_nugget"] = {
        ingredients = {
            {"tfmg:nickel_nugget", 64},
            {"minecraft:gravel", 64},
        },
        addr = PRESS_ADDR,
    },
    ["tfmg:bauxite_powder"] = {
        ingredients = {
            {"tfmg:bauxite_powder", 64},
            {"minecraft:gravel", 64},
        },
        addr = PRESS_ADDR,
    },
}

local SLEEP_T = 20

function createModes (items)
    local result = {}
    for item, _ in pairs(items) do
        result[item] = {"export", 0}
    end
    return result
end

function updateModes (current_modes, current_stock)
    local lower_lim, upper_lim
    local limits = {}
    for item, _ in pairs(current_modes) do
        if LIMIT_EXCEPTIONS[item] ~= nil then
            lower_lim = LIMIT_EXCEPTIONS[item].lower
            upper_lim = LIMIT_EXCEPTIONS[item].upper
        else
            lower_lim = GLOBAL_LIMS.lower
            upper_lim = GLOBAL_LIMS.upper
        end
        limits[item] = {
            lower = lower_lim,
            upper = upper_lim,
        }
    end
    for item, limits in pairs(limits) do
        local count = current_stock[item]
        if count == nil then count = 0 end
        if count <= limits.lower then
            current_modes[item] = {"recipe"}
        elseif count >= limits.upper then
            current_modes[item] = {
                "export",
                count - limits.lower,
            }
        end
    end
end

function cycleItems (ticker, items)
    local makeRequest
    makeRequest = function (item, amt, addr, limit_override)
        local limit = 64
        if addr == MELTER_ADDR then limit = 9 end
        if limit_override ~= nil then limit = limit_override end
        if amt < limit then return end
        local request = {
            name = item,
            _requestCount = limit
        }
        ticker.requestFiltered(addr, request)
        os.sleep(1)
        return makeRequest(item, amt - limit, addr)
    end
    for _, pair in pairs(PRODUCTS) do
        local name, addr, limit = pair[1], pair[2], pair[3]
        if items[name] ~= nil then
            local amt = items[name]
            makeRequest(name, amt, addr, limit)
        end
    end
end

function getAmounts (storage_f)
    local result = {}
    for _, item in pairs(storage_f()) do
        if result[item.name] == nil then result[item.name] = 0 end
        result[item.name] = result[item.name] + item.count
    end
    return result
end

function getNumCraftable (ingredients, current_stock)
    local result = nil
    local item, count
    for _, ingredient in ipairs(ingredients) do
        item, count = ingredient[1], ingredient[2]
        if current_stock[item] == nil then return 0 end
        local num = math.floor(current_stock[item] / count)
        if result == nil then
            result = num
        else
            result = math.min(result, num)
        end
    end
    if result == nil then result = 0 end
    return result
end

function adjustStock (current_stock, ingredients, count)
    if count == 0 then return end
    local item, i_count
    for _, ingredient in ipairs(ingredients) do
        item, i_count = ingredient[1], ingredient[2]
        current_stock[item] = current_stock[item] - (i_count * count)
    end
end

function craftRecipe (ticker, recipe, current_stock)
    local count = getNumCraftable(recipe.ingredients, current_stock)
    if recipe.limit ~= nil then
        count = math.min(count, recipe.limit)
    end
    adjustStock(current_stock, recipe.ingredients, count)
    local createRequest
    createRequest = function (recipe, i)
        if i == nil then i = 1 end
        local ingredient = recipe.ingredients[i]
        if ingredient == nil then return end
        local item = {
            name = ingredient[1],
            _requestCount = ingredient[2],
        }
        return item, createRequest(recipe, i + 1)
    end
    while count > 0 do
        ticker.requestFiltered(recipe.addr, createRequest(recipe))
        os.sleep(1)
        count = count - 1
    end
end

function export (ticker, item, amt)
    if amt <= 0 then return end
    local request = {
        name = item,
        _requestCount = amt
    }
    ticker.requestFiltered(EXPORT_ADDR, request)
end

function run (ticker, export_storage, current_modes)
    if SPEEDOMETER ~= "" and peripheral.call(SPEEDOMETER, "getSpeed") == 0 then
        os.sleep(SLEEP_T)
        return run (ticker, export_storage, current_modes)
    end
    local export_amounts = getAmounts(export_storage.list)
    local stock_amounts = getAmounts(ticker.stock)
    updateModes(current_modes, stock_amounts)
    cycleItems(ticker, stock_amounts)
    for item, mode in pairs(current_modes) do
        -- mode[1] is mode, mode[2] is amt_extra when exporting
        if mode[1] == "recipe" then
            -- make as many recipes as you can with current stock
            local recipe = RECIPES[item]
            craftRecipe(ticker, recipe, stock_amounts)
        elseif mode[1] == "export" then
            local export_amt = export_amounts[item]
            if export_amt == nil then export_amt = 0 end
            local amt_needed = KEEP_STOCKED[item] - export_amt
            local amt = math.min(amt_needed, mode[2])
            export(ticker, item, amt)
        end
    end
    os.sleep(SLEEP_T)
    return run (ticker, export_storage, current_modes)
end

if arg ~= nil and arg[1] == "run" then
    local ticker = peripheral.wrap(STOCK_TICKER)
    local export_storage = peripheral.wrap(EXPORT_STORAGE)
    local current_modes = createModes(KEEP_STOCKED)
    run(ticker, export_storage, current_modes)
end