local ____lualib = require("lualib_bundle")
local __TS__NumberIsFinite = ____lualib.__TS__NumberIsFinite
local __TS__ObjectKeys = ____lualib.__TS__ObjectKeys
local __TS__ObjectValues = ____lualib.__TS__ObjectValues
local __TS__Delete = ____lualib.__TS__Delete
local __TS__Class = ____lualib.__TS__Class
local __TS__ClassExtends = ____lualib.__TS__ClassExtends
local __TS__Decorate = ____lualib.__TS__Decorate
local ____exports = {}
local ____dota_ts_adapter = require("lib.dota_ts_adapter")
local BaseAbility = ____dota_ts_adapter.BaseAbility
local BaseModifier = ____dota_ts_adapter.BaseModifier
local registerAbility = ____dota_ts_adapter.registerAbility
local registerModifier = ____dota_ts_adapter.registerModifier
--- Верхний предел после убывания (синхрон с `src/panorama/arsenal.ts`).
____exports.MAX_EFFECTIVE_INCOMING_REDUCTION_FROM_LINEAR_SUM_PCT = 92
--- «Бумажная» сумма % снижения входящего → эффективный % в бою (убывающая отдача).
-- 
-- @param linearSumPositivePct сумма вкладов из KV/арсенала (+20+20+…)
function ____exports.resolveIncomingDamageReductionPctFromLinearSum(self, linearSumPositivePct)
    if not __TS__NumberIsFinite(linearSumPositivePct) or linearSumPositivePct <= 0 then
        return 0
    end
    local s = linearSumPositivePct
    local hyperbolic = 100 * s / (100 + s)
    return math.min(____exports.MAX_EFFECTIVE_INCOMING_REDUCTION_FROM_LINEAR_SUM_PCT, hyperbolic)
end
--- Значение для MODIFIER_PROPERTY_INCOMING_DAMAGE_PERCENTAGE (отрицательное = меньше урона).
function ____exports.incomingDamageReductionModifierValue(self, linearSumPositivePct)
    local effective = ____exports.resolveIncomingDamageReductionPctFromLinearSum(nil, linearSumPositivePct)
    return effective > 0 and -effective or 0
end
____exports.MODIFIER_INCOMING_DAMAGE_REDUCTION = "modifier_incoming_damage_reduction"
local STATS_MULTIPLIER_INCOMING_PREFIX = "stats_multiplier:"
local function getStorage(self, unit)
    local holder = unit
    if not holder.__incomingDamageReductionStorage then
        holder.__incomingDamageReductionStorage = {sources = {}, eventSources = {}}
    end
    return holder.__incomingDamageReductionStorage
end
local function hasAnySources(self, unit)
    local storage = getStorage(nil, unit)
    return #__TS__ObjectKeys(storage.sources) > 0 or #__TS__ObjectKeys(storage.eventSources) > 0
end
local function resolveSourceAbility(self, unit)
    return unit:FindAbilityByName("ability_incoming_damage_reduction") or unit:FindAbilityByName("ability_stats_multiplier") or unit:FindAbilityByName("ability_stacking_crit") or nil
end
local function ensureCombineModifier(self, unit)
    if unit:FindModifierByName(____exports.MODIFIER_INCOMING_DAMAGE_REDUCTION) then
        return
    end
    local sourceAbility = resolveSourceAbility(nil, unit)
    unit:AddNewModifier(unit, sourceAbility, ____exports.MODIFIER_INCOMING_DAMAGE_REDUCTION, {})
end
local function removeCombineModifierIfUnused(self, unit)
    if hasAnySources(nil, unit) then
        return
    end
    local mod = unit:FindModifierByName(____exports.MODIFIER_INCOMING_DAMAGE_REDUCTION)
    if mod then
        mod:Destroy()
    end
end
--- Сумма «бумажных» % снижения (до формулы убывания).
function ____exports.computeIncomingDamageReductionLinearSum(self, unit, event)
    local storage = getStorage(nil, unit)
    local sum = 0
    for ____, entry in ipairs(__TS__ObjectValues(storage.sources)) do
        local value = entry:resolver()
        if __TS__NumberIsFinite(value) and value > 0 then
            sum = sum + value
        end
    end
    if event then
        for ____, entry in ipairs(__TS__ObjectValues(storage.eventSources)) do
            local value = entry:resolver(event)
            if __TS__NumberIsFinite(value) and value > 0 then
                sum = sum + value
            end
        end
    end
    return sum
end
--- Статический/динамический источник: resolver возвращает положительный % снижения.
function ____exports.setIncomingDamageReductionSource(self, unit, sourceId, resolver)
    if not unit or not IsValidEntity(unit) then
        return
    end
    getStorage(nil, unit).sources[sourceId] = {resolver = resolver}
    ensureCombineModifier(nil, unit)
end
--- Источник, зависящий от удара (угол, золото, мана и т.д.).
function ____exports.setIncomingDamageReductionEventSource(self, unit, sourceId, resolver)
    if not unit or not IsValidEntity(unit) then
        return
    end
    getStorage(nil, unit).eventSources[sourceId] = {resolver = resolver}
    ensureCombineModifier(nil, unit)
end
function ____exports.removeIncomingDamageReductionSource(self, unit, sourceId)
    if not unit or not IsValidEntity(unit) then
        return
    end
    local storage = getStorage(nil, unit)
    __TS__Delete(storage.sources, sourceId)
    __TS__Delete(storage.eventSources, sourceId)
    removeCombineModifierIfUnused(nil, unit)
end
function ____exports.setStatsMultiplierIncomingDamageReductionSource(self, hero, sourceId, resolver)
    ____exports.setIncomingDamageReductionSource(nil, hero, STATS_MULTIPLIER_INCOMING_PREFIX .. sourceId, resolver)
end
function ____exports.removeStatsMultiplierIncomingDamageReductionSource(self, hero, sourceId)
    ____exports.removeIncomingDamageReductionSource(nil, hero, STATS_MULTIPLIER_INCOMING_PREFIX .. sourceId)
end
local ability_incoming_damage_reduction = __TS__Class()
ability_incoming_damage_reduction.name = "ability_incoming_damage_reduction"
ability_incoming_damage_reduction.____file_path = "scripts/vscripts/utils/incoming_damage_reduction_combine.lua"
__TS__ClassExtends(ability_incoming_damage_reduction, BaseAbility)
function ability_incoming_damage_reduction.prototype.GetIntrinsicModifierName(self)
    return ____exports.MODIFIER_INCOMING_DAMAGE_REDUCTION
end
function ability_incoming_damage_reduction.prototype.IsHidden(self)
    return true
end
ability_incoming_damage_reduction = __TS__Decorate(
    ability_incoming_damage_reduction,
    ability_incoming_damage_reduction,
    {registerAbility(nil)},
    {kind = "class", name = "ability_incoming_damage_reduction"}
)
local modifier_incoming_damage_reduction = __TS__Class()
modifier_incoming_damage_reduction.name = "modifier_incoming_damage_reduction"
modifier_incoming_damage_reduction.____file_path = "scripts/vscripts/utils/incoming_damage_reduction_combine.lua"
__TS__ClassExtends(modifier_incoming_damage_reduction, BaseModifier)
function modifier_incoming_damage_reduction.prototype.IsHidden(self)
    return true
end
function modifier_incoming_damage_reduction.prototype.IsPurgable(self)
    return false
end
function modifier_incoming_damage_reduction.prototype.RemoveOnDeath(self)
    return false
end
function modifier_incoming_damage_reduction.prototype.DeclareFunctions(self)
    return {MODIFIER_PROPERTY_INCOMING_DAMAGE_PERCENTAGE}
end
function modifier_incoming_damage_reduction.prototype.GetModifierIncomingDamage_Percentage(self, event)
    local unit = self:GetParent()
    if not unit or not IsValidEntity(unit) then
        return 0
    end
    local linearSum = ____exports.computeIncomingDamageReductionLinearSum(nil, unit, event)
    return ____exports.incomingDamageReductionModifierValue(nil, linearSum)
end
modifier_incoming_damage_reduction = __TS__Decorate(
    modifier_incoming_damage_reduction,
    modifier_incoming_damage_reduction,
    {registerModifier(nil)},
    {kind = "class", name = "modifier_incoming_damage_reduction"}
)
return ____exports