local c = require('component')

-- Javascript-style modules? Okay, why not.
local exports = {}

-- Retrieve a handle to the AE2 network
local function me()
    if (c.isAvailable('upgrade_me')) then
        return c.getPrimary('upgrade_me')
    end
    if (c.isAvailable('me_controller')) then
        return c.getPrimary('me_controller')
    end
    if (c.isAvailable('me_interface')) then
        return c.getPrimary('me_interface')
    end
    return nil
end
exports.me = me

local function getCraftables()
    return me().getCraftables()
end
exports.getCraftables = getCraftables

local function getCraftablesFiltered(filter)
    return me().getCraftables(filter)
end
exports.getCraftablesFiltered = getCraftablesFiltered

local function getCraftablesByName(name)
    return me().getCraftablesFiltered({name = name})
end
exports.getCraftablesByName = getCraftablesByName

local function getCraftableNamesByRegex(nameSelector)
    local craftables = getCraftables()
    local matches = {}; local n = 0
    for k,v in pairs(craftables) do
        if type(v) == "table" then
            local stack = v.getItemStack()
            if string.match(stack.label, nameSelector)
            or string.match(stack.name, nameSelector)
            then
                matches[k] = v
                n = n + 1
            end
        end
    end
    matches.n = n
    return matches
end
exports.getCraftableNameByRegex = getCraftableNameByRegex

local function getSingleCraftableNameByRegex(nameSelector)
    local matches = getCraftableNamesByRegex(nameSelector)
    if matches.n ~= 1 then
        local errstring = "More than one craftable item matched your filters."
        print(errstring)
        print(string.format("SELECTOR: %s", nameSelector))
        print("-- MATCHES --")
        for k,v in pairs(matches) do
            print(string.format("  %s : %s"), tostring(k), tostring(v))
        end
        error(errstring)
    end
    return matches[1]
end

return exports