local Krypton = require("Krypton")
local ScanInventory = require("core.inventory.ScanInventory")

---@class ShopState
---@field running boolean
local ShopState = {}
local ShopState_mt = { __index = ShopState }

function ShopState.new(config, products)
    local self = setmetatable({}, ShopState_mt)

    self.running = false
    self.config = config
    self.products = products
    self.selectedCurrency = config.currencies[1]
    self.selectedCategory = 1
    self.numCategories = 1
    self.productsChanged = false
    self.lastTouched = os.epoch("utc")

    return self
end

local function waitForAnimation(uid)
    coroutine.yield("animationFinished", uid)
end

-- Anytime the shop state is resumed, animation should be finished instantly. (call animation finish hooks)
---@param state ShopState
local function runShop(state)
    -- Shop is starting
    state.running = true
    state.currencies = {}
    local kryptonListeners = {}
    for _, currency in ipairs(state.config.currencies) do
        local node = currency.node
        if not node and currency.id == "krist" then
            node = "https://krist.dev/"
        elseif not node and currency.id == "tenebra" then
            node = "https://tenebra.lil.gay/"
        end
        currency.krypton = Krypton.new({
            privateKey = currency.privateKey,
            node = node,
            id = currency.id,
        })
        table.insert(state.currencies, currency)
        local kryptonWs = currency.krypton:connect()
        kryptonWs:subscribe("transactions")
        table.insert(kryptonListeners, function() kryptonWs:listen() end)
    end
    parallel.waitForAny(unpack(kryptonListeners), function()
        while true do
            local event, transaction = os.pullEvent("transaction")
            --print("Received transaction on " .. transaction.source)
        end
    end, function()
        while state.running do
            ScanInventory.updateProductInventory(state.products)
            if state.config.settings.hideUnavailableProducts then
                state.productsChanged = true
            end
            sleep(state.config.settings.pollFrequency)
        end
    end, function()
        while state.running do
            if state.config.settings.categoryCycleFrequency > 0 and os.epoch("utc") > state.lastTouched + (state.config.settings.activityTimeout * 1000) then
                state.selectedCategory = state.selectedCategory + 1
                if state.selectedCategory > state.numCategories then
                    state.selectedCategory = 1
                end
                state.productsChanged = true
            end
            sleep(math.min(1, state.config.settings.categoryCycleFrequency))
        end
    end)
end

return {
    ShopState = ShopState,
    runShop = runShop,
}