---@class SkillManager 技能管理器，区别于 BuffManager，技能管理器不会创建，都是瞬时的，但是会记录每个玩家使用技能的时间和 CD
local BaseDir            = "Script.Blueprint.SceneObj.Skill."
local SkillManager       = {};

--- 在最开始的时候进行全部加载
SkillManager.Config      = nil;
SkillManager.Owner       = nil;
SkillManager.Skills      = {}; -- 所有的技能
SkillManager.OwnerSkills = {};

function SkillManager:Init(InOwner)
	UGCLogSystem.Log("[SkillManager:Init] 执行")
	-- 加载 Config
	self.Config = require(BaseDir .. 'SkillConfig');
	self.Owner  = InOwner;
	GlobalTickTool:AddTick(self, self.OnTick)
	for i, v in pairs(self.Config) do
		self:InitSingle(i, v);
	end
end

function SkillManager:InitSingle(i, v)
	local Item     = require(BaseDir .. 'Script.Skill_' .. v.Name);
	self.Skills[i] = Item;
	Item.SkillID   = i;
	if not table.isEmpty(v.Params) then
		for Name, Value in pairs(v.Params) do
			Item[Name] = Value;
		end
	end
	local HadInit = table.func(Item, "Init");
	Item.HadInit  = HadInit;
end

function SkillManager:OnTick(dt, st)
	if st == nil then return ; end
	for PlayerKey, Skills in pairs(self.OwnerSkills) do
		for SkillId, TimeInfo in pairs(Skills) do
			if not TimeInfo.CanExec then
				if TimeInfo.EndTime <= st then
					TimeInfo.CanExec = true;
					self:ResetSkill(SkillId, PlayerKey);
				end
			end
		end
	end
end

function SkillManager:GetSkillItem(InSkillId)
	if self.Skills[InSkillId] == nil then
		self:InitSingle(InSkillId, self.Config[InSkillId]);
	end
	return self.Skills[InSkillId];
end

-- 发送 RPC
function SkillManager:SendSkillRPC(InFuncName, InSkillId, InPlayerKey, ...)
	if IsServer then
		UnrealNetwork.CallUnrealRPC_Multicast_Unreliable(self.Owner, "SendSkillRPC", InFuncName, InSkillId, InPlayerKey, ...);
	end
end

--- 添加技能
---@param InSkillId int32
function SkillManager:AddSkill(InSkillId, InPlayerKey, ...)
	assert(InSkillId ~= nil);
	UGCLogSystem.LogTree(string.format("[SkillManager:AddSkill] self.Config ="), self.Config)
	UGCLogSystem.Log("[SkillManager:AddSkill] InSkillId = %s", tostring(InSkillId));
	assert(self.Config[InSkillId] ~= nil);
	local Item = self:GetSkillItem(InSkillId);
	if Item == nil then
		UGCLogSystem.Log("[SkillManager:AddSkill] SkillId = %d 的技能没有成功加入表中", InSkillId);
		return false;
	end
	
	-- 检查能量是否够，如果不够那么就无法执行
	local Cost = self.Config[InSkillId].Cost;
	if IsServer then
		if Cost ~= nil and Cost > 0 then
			-- 获取 PS 里面的能量
			local PS = UGCGameSystem.GetPlayerStateByPlayerKey(InPlayerKey);
			if UE.IsValid(PS) then
				if not self:AddSkillEnergy(-Cost) then
					return false;
				end
			end
		end
	end
	
	-- 验证一下是否可以执行
	if self.OwnerSkills[InPlayerKey] == nil then
		self.OwnerSkills[InPlayerKey] = {};
	else
		local SkillInfo = self.OwnerSkills[InPlayerKey][InSkillId];
		if SkillInfo ~= nil then
			-- 没有到执行的时间呢
			if not SkillInfo.CanExec then
				if IsServer then return false; end
			end
		end
	end
	
	-- 执行
	Item.SkillId   = InSkillId;
	local bSuccess = table.func(Item, "Add", InPlayerKey, ...);
	-- 执行成功
	if not bSuccess then
		UGCLogSystem.Log("[SkillManager:AddSkill] 没有执行 %s 的 AddSkill 成功，请检查", self.Config[InSkillId].Name)
		return false;
	end
	-- 那就添加进去
	local StartTime = UE.GetServerTime();
	local Cooldown  = self.Config[InSkillId].Cooldown;
	if Cooldown == nil then Cooldown = 0; end
	self.OwnerSkills[InPlayerKey][InSkillId] = {
		StartTime = StartTime,
		EndTime   = StartTime + Cooldown;
		CanExec   = false; -- 在冷却
	};
	if IsServer then
		self:SendSkillRPC("AddSkill", InSkillId, InPlayerKey, ...);
	end
	return true;
end

function SkillManager:RemoveSkill(InSkillId, InPlayerKey)
	table.func(self:GetSkillItem(InSkillId), "Remove", InPlayerKey);
end

function SkillManager:ResetSkill(InSkillId, InPlayerKey)
	table.func(self:GetSkillItem(InSkillId), "Reset", InPlayerKey);
	if IsServer then
		self:SendSkillRPC("ResetSkill", InSkillId, InPlayerKey);
	else
	
	end
end

return SkillManager;