--BuffSkill:只会给自身添加buff，没有技能动画的技能，跟 技能(Skill) 不是一个东西

local KEYPOSITION_BUFFSKILL2 = LuaConst.ESkillKeyPosition.BuffSkill2
--副将
local FirstPersonEventDispatcher = require"Battle/Logic/Event/FirstPersonEventDispatcher"

local BattleEffect = require"Battle/Logic/BattleEffect/BattleEffect"

local BuffSkillSystem = {}

local LuaConst=LuaConst
local ipairs = ipairs
local pairs = pairs

local Index2BuffSkillKeyPositionDic = {
    [1] = LuaConst.ESkillKeyPosition["BuffSkill1"],
    [2] = LuaConst.ESkillKeyPosition["BuffSkill2"],
    [3] = LuaConst.ESkillKeyPosition["BuffSkill3"],
    [4] = LuaConst.ESkillKeyPosition["BuffSkill4"],
    [5] = LuaConst.ESkillKeyPosition["BuffSkill5"],
}

function BuffSkillSystem.IsGodBeastSkill(data)
    return data and data.KeyPosition == KEYPOSITION_BUFFSKILL2
end


function BuffSkillSystem.AddBuffSkillById(entity, buffSkillId)
    entity.components.buffSkill:AddBuffSkillById(buffSkillId)
end
--可能返回nil
function BuffSkillSystem.GetBuffSkillKeyPosByIndex(index)
    if Index2BuffSkillKeyPositionDic[index] then
        return Index2BuffSkillKeyPositionDic[index]
    else
        logging.error(LTAG.ERROR, "HYW : GetBuffSkillKeyPosByIndex failed!  index : ", index)
    end
end

function BuffSkillSystem.ChangeBuffSkillCd(entity, buffSkillId, delta)
    entity.components.buffSkill:ChangeBuffSkillCd(buffSkillId, delta)
end

function BuffSkillSystem.SwitchRightGodBeastSkillOfEntity(entity)
    entity.components.buffSkill:SwitchRightGodBeastSkill()
end

function BuffSkillSystem.SwitchLeftGodBeastSkillOfEntity(entity)
    entity.components.buffSkill:SwitchLeftGodBeastSkill()
end

function BuffSkillSystem.OnLogicUpdate(entity)
    local buffSkillUpdateList = entity.components.buffSkill.buffSkillUpdateList
    -- 计略 主动技能的cd更新
    for i,buffSkillUpdate in ipairs(buffSkillUpdateList) do
        if buffSkillUpdate.CD > 0 then
            buffSkillUpdate.CD = buffSkillUpdate.CD - LuaConst.TimeSpanMs
            if buffSkillUpdate.CD <= 0 then
                buffSkillUpdate.CD = 0
                FirstPersonEventDispatcher.OnBuffSkillCDReady(entity, buffSkillUpdate)
            end
        end
    end
end

function BuffSkillSystem.CanUseBuffSkill(entity, keyPosition)
    local can = false
    local buffSkillUpdate
    repeat
        if entity.components.skillBase:IsKeyPosBanned(keyPosition) then
            break
        end

        if not entity.components.buff:HasBuff(LuaConst.SpecialBuffs.CanSkill) then
            break
        end

        local buffSkillComp = entity.components.buffSkill
        if buffSkillComp.buffSkillUpdateList == nil then
            break
        end

        for i,_buffSkillUpdate in ipairs(buffSkillComp.buffSkillUpdateList) do
            if _buffSkillUpdate.BuffSkillData.KeyPosition == keyPosition and not _buffSkillUpdate.IsHiding then
                buffSkillUpdate = _buffSkillUpdate
                break
            end
        end

        if not buffSkillUpdate then
            break
        end

        if buffSkillUpdate.CD > 0 then
            break
        end
        
        can = true
    until true
    return can, buffSkillUpdate
end

function BuffSkillSystem.ReleaseBuffSkill(entity, keyPosition)
    local canUse, buffSkillUpdate = BuffSkillSystem.CanUseBuffSkill(entity, keyPosition)
    if canUse then
        SystemManager.AddBuff(entity, buffSkillUpdate.BuffSkillData.BuffID)
        entity.components.skillBase:ClearSkillJoystickInfo()
        BattleEventSystem.OnUseBuffSkill(entity, buffSkillUpdate.BuffSkillData.ID)

        if not GlobalBattleData.Get_IsSkillNoCD() or not entity._logicInitData.IsPlayerSelf then
            BuffSkillSystem.EnterCD(entity, buffSkillUpdate)
            FirstPersonEventDispatcher.OnBuffSkillEnterCD(entity, buffSkillUpdate)
        end
        return true
    end
    return false
end

function BuffSkillSystem.EnterCD(entity, buffSkillUpdate)
    if BuffSkillSystem.IsGodBeastSkill(buffSkillUpdate.BuffSkillData) then
        --神兽技共用CD
        for k,v in pairs(entity.components.buffSkill.buffSkillUpdateList) do
            if BuffSkillSystem.IsGodBeastSkill(v.BuffSkillData) then
                v.CD = v.BuffSkillData.CD + buffSkillUpdate.CdChange
            end
        end
    else
        buffSkillUpdate.CD = buffSkillUpdate.BuffSkillData.CD + buffSkillUpdate.CdChange
    end
end

function BuffSkillSystem.OnSwitchHero(fromEntity, toEntity, dontBackground)
    toEntity.components.buffSkill:OnSwitchHero(fromEntity)
end

function BuffSkillSystem.GetBuffSkillUpdateByIndex(entity, index)
    local buffSkillUpdateList = entity.components.buffSkill.buffSkillUpdateList
    if buffSkillUpdateList then
        for i,_buffSkillUpdate in ipairs(buffSkillUpdateList) do
            if _buffSkillUpdate.BuffSkillData.KeyPosition == BuffSkillSystem.GetBuffSkillKeyPosByIndex(index) then
                return _buffSkillUpdate
            end
        end
    end
end

return BuffSkillSystem