local Page = {}

local nCurrentPageIndex = 1

local function GetNextIndex()
    local tPageInfo = GetCache("PAGE_INFO")

    local nImgListCount = #tPageInfo.tImgPath

    local nNextPageIndex = nCurrentPageIndex + 1
    if nNextPageIndex > nImgListCount then
        nNextPageIndex = 1
    end

    return nNextPageIndex
end

local function GetPreIndex()
    local tPageInfo = GetCache("PAGE_INFO")

    local nImgListCount = #tPageInfo.tImgPath

    local nPrePageIndex = nCurrentPageIndex - 1
    if nPrePageIndex < 1 then
        nPrePageIndex = nImgListCount
    end

    return nPrePageIndex
end

local function ChangeCurrentIndexToNext()
    local tPageInfo = GetCache("PAGE_INFO")

    local nImgListCount = #tPageInfo.tImgPath

    nCurrentPageIndex = nCurrentPageIndex + 1

    if nCurrentPageIndex > nImgListCount then
        nCurrentPageIndex = 1
    end
end

local function ChangeCurrentIndexToPre()
    local tPageInfo = GetCache("PAGE_INFO")

    local nImgListCount = #tPageInfo.tImgPath

    nCurrentPageIndex = nCurrentPageIndex - 1

    if nCurrentPageIndex < 1 then
        nCurrentPageIndex = nImgListCount
    end
end

local function RefreshPageUI()
    local tPageInfo = GetCache("PAGE_INFO")

    local szCurrentPath = tPageInfo.tImgPath[nCurrentPageIndex]
    local nNextIndex    = GetNextIndex()
    local szNextPath    = tPageInfo.tImgPath[nNextIndex]

    local eventManager = require('Base/ZEventDispatchCenter.lua')
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_REFRESH_UI, szCurrentPath, szNextPath, tPageInfo.szImgBG)
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_CHANGE_SHADOW_IMG, tPageInfo.szShadowLeft, tPageInfo.nShadowWidth)
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_CHANGE_EFFENT_TYPE, tPageInfo.leftEffectType)
end

local function PageToPre()
    local tPageInfo = GetCache("PAGE_INFO")

    local szCurrentPath = tPageInfo.tImgPath[nCurrentPageIndex]
    local nNextIndex    = GetPreIndex()
    local szNextPath    = tPageInfo.tImgPath[nNextIndex]

    ChangeCurrentIndexToPre()

    local eventManager = require('Base/ZEventDispatchCenter.lua')
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_REFRESH_UI, szCurrentPath, szNextPath, tPageInfo.szImgBG)
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_CHANGE_SHADOW_IMG, tPageInfo.szShadowRight)
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_CHANGE_EFFENT_TYPE, tPageInfo.rightEffectType)
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_EFFECT, tPageInfo.nEffectTime)

    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_CHANGE, nCurrentPageIndex)
end

local function PageToNext()
    local tPageInfo = GetCache("PAGE_INFO")

    local szCurrentPath = tPageInfo.tImgPath[nCurrentPageIndex]
    local nNextIndex    = GetNextIndex()
    local szNextPath    = tPageInfo.tImgPath[nNextIndex]

    ChangeCurrentIndexToNext()

    local eventManager = require('Base/ZEventDispatchCenter.lua')
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_REFRESH_UI, szCurrentPath, szNextPath, tPageInfo.szImgBG)
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_CHANGE_SHADOW_IMG, tPageInfo.szShadowLeft)
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_CHANGE_EFFENT_TYPE, tPageInfo.leftEffectType)
    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_MODULE_EFFECT, tPageInfo.nEffectTime)

    eventManager:DispatchEvent(eventManager.EventType.COMMON_UI_PAGE_CHANGE, nCurrentPageIndex)
end

local function InitPageUI()
    local rootPanel = Page.rootPanel

    local szPageScript  = "CommonUtils/Page/PageModule.lua"
    local uiHelper      = require('Base/UIHelper.lua')
    uiHelper:AddScript(rootPanel, szPageScript)

    require(szPageScript).Init()

    RefreshPageUI()
end

local function RefreshUI()
    InitPageUI()
end

local function RegisterEvent()
    local eventManager  = require('Base/ZEventDispatchCenter.lua')

    eventManager:RegisterEvent(eventManager.EventType.COMMON_UI_PAGE_PRE, PageToPre)
    eventManager:RegisterEvent(eventManager.EventType.COMMON_UI_PAGE_NEXT, PageToNext)
end

local function UnregisterEvent()
    local eventManager  = require('Base/ZEventDispatchCenter.lua')

    eventManager:UnregisterEvent(eventManager.EventType.COMMON_UI_PAGE_NEXT, PageToNext)
    eventManager:UnregisterEvent(eventManager.EventType.COMMON_UI_PAGE_PRE, PageToPre)
end

local function UnInitPage()
    require("CommonUtils/Page/PageModule.lua").UnInit()
end

local function UnInitData()
    nCurrentPageIndex = 1
end

function Page.Awake(luaRoot)
    Page.luaRoot = luaRoot

    local canvas = CS.UnityEngine.GameObject.Find('Canvas')
    Page._rootCanvas = canvas

    Page.rootPanel = luaRoot
end

function Page.Init()
    RefreshUI()
    RegisterEvent()
end

function Page.UnInit()
    UnInitPage()
    UnInitData()
    UnregisterEvent()
end

return Page