-- 选择时间按钮、选择时间界面
local TimeSettingPanel = {}

local M = TimeSettingPanel

function TimeSettingPanel.new(parent, btn_date1, btn_date2, posX, posY, callback, flag)
    local self = setmetatable({}, { __index = M })
    self.class = "TimeSettingPanel"
    self.parent = parent
    self.btn1 = btn_date1
    self.btn2 = btn_date2
    self.posX = posX or 0
    self.posY = posY or 0
    self.callback = callback
    self.show_day = flag and 7 or 7
    self:initView()
    return self
end

local function initButton(self, btn_date, today)
    btn_date.data = today
    btn_date.title = os.date("%Y年%m月%d日", today)
    btn_date.onClick:Set(function()
        self:ShowSetDatePanel(btn_date)
    end)
end

function M:initView()
    local now_time = os.date("*t", now)
    local today = os.time({ year = now_time.year, month = now_time.month, day = now_time.day, hour = 0, min = 0, sec = 0 })
    initButton(self, self.btn1, today)
    initButton(self, self.btn2, today)
end

function M:GetDate()
    local time1 = self.btn1.data
    local time2 = self.btn2.data
    local begin_time = math.min(time1, time2)
    local end_time = math.max(time1, time2) + 86400
    return begin_time, end_time
end

function M:SetTenDay()
    local now_time = os.date("*t", now)
    local today = os.time({ year = now_time.year, month = now_time.month, day = now_time.day, hour = 0, min = 0, sec = 0 })
    local nine_day_ago = today - 86400 * 9
    self.btn1.data = nine_day_ago
    self.btn1.title = os.date("%Y年%m月%d日", nine_day_ago)
    self.btn2.data = today
    self.btn2.title = os.date("%Y年%m月%d日", today)
end

local max_pos, min_pos = 0.2, 2.2
-- 添加列表特效：中部的组件放大，两边的渐渐透明
-- local function addListEffect(lst)
--     local mid_y = 0.5 * lst.height
--     local cnt = lst.numChildren
--     for i = 0, cnt - 1 do
--         local item = lst:GetChildAt(i)
--         local index = lst.scrollPane.percY * (lst.numChildren - 5)
--         local dist = math.abs(index + 2 - i) -- 距离列表中点的位置
--         if dist <= max_pos then
--             item.alpha = 1
--             item:GetChild("title"):SetScale(1, 1)
--         elseif dist <= min_pos then
--             local scale = dist / min_pos
--             item.alpha = 1 - 0.7 * scale
--             item:GetChild("title"):SetScale(1 - 0.5 * scale, 1 - 0.5 * scale)
--         else
--             item.alpha = 0.3
--             item:GetChild("title"):SetScale(0.5, 0.5)
--         end
--         lst.data = lst:GetChildAt(2).data - math.floor(index + 0.5) * 86400
--     end
-- end
-- 显示日期
-- +/-2的原因是列表中需要两个看不见的组件
-- local function initList(lst, date, show_day)
--     local now_time = os.date("*t", now)
--     local today = os.time({ year = now_time.year, month = now_time.month, day = now_time.day, hour = 0, min = 0, sec = 0 })
--     lst:RemoveChildrenToPool()
--     local index = -1
--     local num = show_day - 1
--     for i = 0 - 2, num + 2 do
--         local item = lst:AddItemFromPool()
--         if i >= 0 and i <= num then
--             local time = today - 86400 * i
--             item.data = time
--             item.title = os.date("%Y年%m月%d日", time)
--             if time == date then
--                 index = i
--             end
--         else
--             item.title = " "
--         end
--     end
--     lst.scrollPane.percY = index / num
--     addListEffect(lst)
--     lst.scrollPane.onScroll:Add(function()
--         addListEffect(lst)
--     end)
-- end

local function initList(list_start, list_end, showday, day1, day2)
    local now_time = os.date("*t")
    local today = os.time({ year = now_time.year, month = now_time.month, day = now_time.day, hour = 0, min = 0, sec = 0 })
    list_start:SetVirtual()
    list_start.itemRenderer = function(index, obj)
        local time = today - 86400 * index
        obj.data = time
        obj.text = os.date("%m月%d日", time)
        obj.selected = day1 == time
    end
    list_end:SetVirtual()
    list_end.itemRenderer = function(index, obj)
        local time = today - 86400 * index
        obj.data = time
        obj.text = os.date("%m月%d日", time)
        obj.selected = day2 == time
    end
    list_start.numItems = showday
    list_end.numItems = showday
    list_start:RefreshVirtualList()
    list_end:RefreshVirtualList()
end

-- 显示设置时间面板
function M:ShowSetDatePanel()
    local com_set_date = UIPackage.CreateObjectFromURL("ui://NewGroup/com_set_time_together")
    local list_start = com_set_date:GetChild("list_start")
    local list_end = com_set_date:GetChild("list_end")
    local now_time = os.date("*t")
    local today = os.time({ year = now_time.year, month = now_time.month, day = now_time.day, hour = 0, min = 0, sec = 0 })
    initList(list_start, list_end, self.show_day, self.btn1.data, self.btn2.data)
    com_set_date:GetChild("btn_ok").onClick:Set(function()
        self.btn1.data = today - 86400 * list_start.selectedIndex
        self.btn1.title = os.date("%Y年%m月%d日", self.btn1.data)
        self.btn2.data = today - 86400 * list_end.selectedIndex
        self.btn2.title = os.date("%Y年%m月%d日", self.btn2.data)
        com_set_date:Dispose()
        if self.callback then self.callback() end
    end)
    com_set_date:GetChild("btn_cancel").onClick:Set(function()
        -- local time = os.date("%Y年%m月%d日", lst_y.data)
        -- btn.title = time
        -- btn.data = lst_y.data
        com_set_date:Dispose()
    end)
    AddPanelCenter(com_set_date)
    -- self.parent:AddChild(com_set_date)
    -- com_set_date.x = self.posX
    -- com_set_date.y = GRoot.inst.height - com_set_date.height - (GRoot.inst.height - self.parent.height) * 0.5 + self.posY
end

return M