-- 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 3 or 3
    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

-- 显示设置时间面板
function M:ShowSetDatePanel(btn)
    local date = btn.data
    local com_set_date = UIPackage.CreateObjectFromURL("ui://NewGroup/com_set_time")
    local lst_y = com_set_date:GetChild("lst_year")
    initList(lst_y, date, self.show_day)
    com_set_date:GetChild("btn_confirm").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()
        if self.callback then self.callback() end
    end)
    AddPanel(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