--触发事件处理模块
--需要保证订阅在前, 触发在后


local TriggerDefine = require("trigger.TriggerDefine")


--订阅列表
local moniterTbl = {}


--检测触发事件是否正确
local function checkTrigger(arg)
    local errTag = nil
    if type(arg) == "table" then
        for _, tag in ipairs(arg) do
            if not TriggerDefine.TRIGGERADDTB[tag] and not TriggerDefine.TRIGGERUPDATETB[tag] then
                errTag = tag
                break
            end
        end
    else
        if not TriggerDefine.TRIGGERADDTB[arg] and not TriggerDefine.TRIGGERUPDATETB[arg] then
            errTag = arg
        end
    end

    if errTag then
        assert(false, string.format("注册事件不存在, tag = %s", errTag))
    end
    return true
end


--注册订阅
function RegisterMoniter(triggerArr, cbFunc)
    checkTrigger(triggerArr)

    local handler = #moniterTbl+1
    moniterTbl[handler] = {
        triggerArr = triggerArr,
        cbFunc = cbFunc,
    }

    return handler
end

--移除订阅
function RemoveMoniter(handler)
    if not handler then
        return
    end

    table.remove(moniterTbl, handler)
end


--广播
function Broadcast(human, triggerTag, val, isAdd)
    for tag, v in ipairs(moniterTbl) do
        if table.find(v.triggerArr, triggerTag) then
            local f = v.cbFunc
            local res = pcall(f, human, triggerTag, val, isAdd)
            if not res then
                print(string.format("广播失败, handler = %s", tag))
            end
        end
    end
end


--触发事件
function Trigger(human, triggerTag, val)
    local isAdd = false
    if TriggerDefine.TRIGGERADDTB[triggerTag] then
        isAdd = true
    end

    if not isAdd then
        if not TriggerDefine.TRIGGERUPDATETB[triggerTag] then
            assert(false, string.format("触发事件不存在, tag = %s", triggerTag))
        end
    end


    Broadcast(human, triggerTag, val, isAdd)
end