local PLAYER_EVENT_ON_LOGIN = 3
local PLAYER_EVENT_ON_SPELL_CAST = 5
local PLAYER_EVENT_ON_LOGOUT = 4
local PLAYER_EVENT_ON_COMMAND = 42

local PREMIUM_FLAG_INDEX = 100

local ACCOUNT_FLAG_RECURRING_BILLING = 8192

local SUMMON_SQUIRE_SPELL_ID = 80000

local SQUIRE_CREATURE_TEMPLATE_ID = 9000001

local NPC_TEXT_ID = 10000000

local premiums_table = {}
local squires_table = {}

---todo extract to utils
---@param inputstr string
---@param separator string
---@return table
local function SplitString(inputstr, separator)
    if separator == nil then
        separator = "%s"
    end
    local t = {}
    for str in string.gmatch(inputstr, "([^" .. separator .. "]+)") do
        table.insert(t, str)
    end
    return t
end

---@return boolean
local function IsPremium(player)
    return premiums_table[player:GetAccountId()] == true
end

local function OnPremiumPlayer(player)
    if not IsPremium(player) then
        return
    end

    player:SendAreaTriggerMessage(
        'На вашем аккаунте активна подписка Premium! Благодарим за поддержку проекта MoonWell.')

    player:LearnSpell(SUMMON_SQUIRE_SPELL_ID)
    player:SendBroadcastMessage("Милостью Элуны вам была выдана способность |cff71d5ff|Hspell:" ..
        SUMMON_SQUIRE_SPELL_ID .. "|h[" .. "Призыв Оруженосца]h|")
end

local function RefreshPremiumStatus(player)
    local query = AuthDBQuery("SELECT flags FROM account WHERE id = " .. player:GetAccountId())

    if query then
        local function HasFlag(mask, flag)
            return bit_and(mask, flag) == flag
        end


        local flags = query:GetUInt32(0)

        if HasFlag(flags, ACCOUNT_FLAG_RECURRING_BILLING) then
            premiums_table[player:GetAccountId()] = true

            OnPremiumPlayer(player)

            return true
        end
    end


    return false
end

local function ApplyPremium(player)
    AuthDBExecute(
        string.format(
            "UPDATE account SET flags = flags | %d WHERE id = %d",
            ACCOUNT_FLAG_RECURRING_BILLING,
            player:GetAccountId()
        )
    )

    RefreshPremiumStatus(player)
end

local function OnLogin(event, player)
    RefreshPremiumStatus(player)
end

--- @param event any
--- @param player any
--- @param command string
--- @param chatHandler any
local function OnCommand(event, player, command, chatHandler)
    ---Console is not supported yet
    if not player then return end

    local parts = SplitString(command:lower(), ' ')

    if parts[1] ~= 'premium' then return end

    if parts[2] == 'add' then
        ApplyPremium(player:GetSelection())
    end

    return false
end

local function OnSummonSquireCast(player)
    local x, y, z, o = player:GetLocation()

    if (squires_table[player:GetGUIDLow()] ~= nil) then
        local existing_squire = player:GetMap():GetWorldObject(squires_table[player:GetGUIDLow()])
        if (existing_squire ~= nil) then
            existing_squire:DespawnOrUnsummon()
        end
    end

    local squire = player:SpawnCreature(SQUIRE_CREATURE_TEMPLATE_ID, x + 1, y + 1, z, o, 1, 30000)
    squires_table[player:GetGUIDLow()] = squire:GetGUID()
    print(squires_table[player:GetGUIDLow()])

    if squire then
        squire:SetFaction(player:GetFaction())
    end
end

local function OnSpellCast(event, player, spell, skipCheck)
    local spellId = spell:GetEntry()

    if spellId == SUMMON_SQUIRE_SPELL_ID then
        OnSummonSquireCast(player)
    end
end

local function OnGossipHello(event, player, creature)
    player:GossipClearMenu()

    player:GossipMenuAddItem(4, "Открыть почтовый ящик", 900001, 1)
    player:GossipMenuAddItem(1, "Открыть банк", 900001, 2)
    player:GossipMenuAddItem(6, "Открыть аукцион", 900001, 3)
    player:GossipMenuAddItem(4, "Отремонтировать снаряжение", 900001, 4)

    player:GossipSendMenu(NPC_TEXT_ID, creature)
end

local function OnGossipSelect(event, player, creature, sender, intid, code)
    if sender == 900001 then
        if intid == 1 then
            player:SendShowMailBox(creature:GetGUID())
            player:GossipComplete()
        end

        if intid == 2 then
            player:SendShowBank(creature)
            player:GossipComplete()
        end

        if intid == 3 then
            player:SendAuctionMenu(creature)
            player:GossipComplete()
        end

        if intid == 4 then
            player:DurabilityRepairAll()
            player:PlayDirectSound(1116)
            player:GossipComplete()
        end
    end
end

local function OnLogout(event, player)
    player:RemoveSpell(SUMMON_SQUIRE_SPELL_ID)
    squires_table[player:GetGUID()] = nil
end

RegisterCreatureGossipEvent(SQUIRE_CREATURE_TEMPLATE_ID, 1, OnGossipHello)
RegisterCreatureGossipEvent(SQUIRE_CREATURE_TEMPLATE_ID, 2, OnGossipSelect)
RegisterPlayerEvent(PLAYER_EVENT_ON_LOGIN, OnLogin)
RegisterPlayerEvent(PLAYER_EVENT_ON_LOGOUT, OnLogout)
RegisterPlayerEvent(PLAYER_EVENT_ON_COMMAND, OnCommand)
RegisterPlayerEvent(PLAYER_EVENT_ON_SPELL_CAST, OnSpellCast)