local AddonName, Addon = ...
local OmniCC = _G.OmniCC
local L = LibStub("AceLocale-3.0"):GetLocale("OmniCC")
local DEFAULT_DURATION = 30
local QUESTION = "Interface\\Icons\\INV_Misc_QuestionMark"

local function getRandomIcon()
    local numTabs = GetNumSpellTabs()
    if not numTabs or numTabs == 0 then
        return QUESTION
    end

    local _, _, offset, numSlots = GetSpellTabInfo(numTabs)
    if not numSlots or numSlots <= 0 then
        return QUESTION
    end

    for _ = 1, 12 do -- try max 12 times to get a valid icon
        local icon = GetSpellTexture(math.random(offset + 1, offset + numSlots), BOOKTYPE_SPELL or "spell")
        if icon then
            return icon
        end
    end

    return QUESTION
end

-- preview dialog
local PreviewDialog = CreateFrame("Frame", AddonName .. "PreviewDialog", UIParent)
OmniCC.Templates["UIPanelDialogTemplate"](PreviewDialog)
PreviewDialog:Hide()
PreviewDialog:ClearAllPoints()
PreviewDialog:SetPoint("CENTER")
PreviewDialog:EnableMouse(true)
PreviewDialog:SetClampedToScreen(true)
PreviewDialog:SetFrameStrata("TOOLTIP")
PreviewDialog:SetMovable(true)
PreviewDialog:SetSize(165, 155)
PreviewDialog:SetToplevel(true)
PreviewDialog:SetScript(
    "OnShow",
    function(self)
        self.icon:SetTexture(getRandomIcon())
        self:StartCooldown(self.duration:GetValue())
    end
)

PreviewDialog:SetScript(
    "OnHide",
    function(self)
        if self:IsShown() then
            self:Hide()
        end

        self._repeat = false
        self:SetScript("OnUpdate", nil)
        self.cooldown:SetCooldown(0, 0)
    end
)

-- title region
local tr = CreateFrame("Frame", nil, PreviewDialog)
OmniCC.Templates["TitleDragAreaTemplate"](tr)
tr:SetAllPoints(PreviewDialog.TitleBG)

-- title text
local text = PreviewDialog:CreateFontString(nil, "OVERLAY", "GameFontHighlight")
text:SetPoint("CENTER", tr)
text:SetText("Preview")

-- container
local container = CreateFrame("Frame", nil, PreviewDialog)
container:SetPoint("TOPLEFT", 10, -27)
container:SetPoint("BOTTOMRIGHT", -7, 9)

-- contianer bg
local bg = container:CreateTexture(nil, "BACKGROUND")
bg:SetTexture(1, 1, 1, 0.3)
bg:SetAllPoints()

-- action icon
local icon = container:CreateTexture(nil, "ARTWORK")
icon:SetSize(ActionButton1:GetWidth() * 2, ActionButton1:GetHeight() * 2)
icon:SetPoint("TOP", 0, -4)
PreviewDialog.icon = icon
container.icon = icon

-- cooldown
local cooldown = CreateFrame("Cooldown", nil, container, "CooldownFrameTemplate")
cooldown:SetAllPoints(icon)
--cooldown:SetEdgeTexture("Interface\\Cooldown\\edge")
--cooldown:SetSwipeColor(0, 0, 0)
cooldown:SetDrawEdge(false)
PreviewDialog.cooldown = cooldown

-- duration input
local editBoxText = container:CreateFontString(nil, "ARTWORK", "GameFontNormalLarge")
editBoxText:SetText(L.Duration)
editBoxText:SetPoint("TOP", icon, "BOTTOM", 0, -2)

local editBox = CreateFrame('EditBox', "$parentDurationInput", container)
OmniCC.Templates["NumericInputSpinnerTemplate"](editBox)
editBox:SetAutoFocus(false)
editBox:SetPoint("TOP", editBoxText, "BOTTOM", 4, -2)
editBox:SetWidth(container:GetWidth() - 54)
editBox:SetMinMaxValues(0, 9999999)
editBox:SetMaxLetters(7)
editBox:SetValue(DEFAULT_DURATION)
editBox:SetOnValueChangedCallback(function(_, value)
    PreviewDialog:StartCooldown(value or 0)
end)

PreviewDialog.duration = editBox

-- preview
function PreviewDialog:SetTheme(theme)
    self.cooldown._occ_settings_force = theme

    if OmniCC.Cooldown.UpdateSettings(self.cooldown) then
        local display = OmniCC.Display:Get(self.cooldown:GetParent())
        if display then
            display:UpdateCooldownText()
        end
    end

    self:Show()
end

local function RepeatingTimer(frame, elapsed)
    if not frame._repeat then return end
    if GetTime() >= frame._endTime then
      frame.icon:SetTexture(getRandomIcon())
      local t = GetTime()
      frame.cooldown:SetCooldown(t, frame._duration)
      frame._endTime = t + frame._duration + 0.5
    end
end

function PreviewDialog:StartCooldown(duration)
  duration = tonumber(duration) or 0
  if duration <= 0 then
    self._repeat = false
    self:SetScript("OnUpdate", nil)
    self.cooldown:SetCooldown(0, 0)
    return
  end

  self._repeat = true
  self._duration = duration

  local now = GetTime()
  self.cooldown:SetCooldown(now, duration)
  self._endTime = now + duration

  self:SetScript("OnUpdate", RepeatingTimer)
end

-- exports
Addon.PreviewDialog = PreviewDialog