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-- Nanami-UI: Game Menu (GameMenu.lua)
-- Reskins the ESC menu (GameMenuFrame) with pink cat-paw theme
--------------------------------------------------------------------------------

SFrames.GameMenu = {}

local GM = SFrames.GameMenu

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-- Theme: Pink Cat-Paw
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local T = SFrames.ActiveTheme

local BUTTON_W   = 170
local BUTTON_H   = 26
local BUTTON_GAP = 5
local SIDE_PAD   = 16
local HEADER_H   = 32

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-- Helpers
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local function GetFont()
    if SFrames and SFrames.GetFont then return SFrames:GetFont() end
    return "Fonts\\ARIALN.TTF"
end

local function SetRoundBackdrop(frame, bgColor, borderColor)
    frame:SetBackdrop({
        bgFile   = "Interface\\Tooltips\\UI-Tooltip-Background",
        edgeFile = "Interface\\Tooltips\\UI-Tooltip-Border",
        tile = true, tileSize = 16, edgeSize = 14,
        insets = { left = 3, right = 3, top = 3, bottom = 3 },
    })
    local bg = bgColor or T.panelBg
    local bd = borderColor or T.panelBorder
    frame:SetBackdropColor(bg[1], bg[2], bg[3], bg[4] or 1)
    frame:SetBackdropBorderColor(bd[1], bd[2], bd[3], bd[4] or 1)
end

local function CreateShadow(parent, size)
    local s = CreateFrame("Frame", nil, parent)
    local sz = size or 4
    s:SetPoint("TOPLEFT", parent, "TOPLEFT", -sz, sz)
    s:SetPoint("BOTTOMRIGHT", parent, "BOTTOMRIGHT", sz, -sz)
    s:SetFrameLevel(math.max(parent:GetFrameLevel() - 1, 0))
    s:SetBackdrop({
        bgFile   = "Interface\\Tooltips\\UI-Tooltip-Background",
        edgeFile = "Interface\\Tooltips\\UI-Tooltip-Border",
        tile = true, tileSize = 16, edgeSize = 16,
        insets = { left = 4, right = 4, top = 4, bottom = 4 },
    })
    s:SetBackdropColor(0, 0, 0, 0.55)
    s:SetBackdropBorderColor(0, 0, 0, 0.4)
    return s
end

local function HideTexture(tex)
    if not tex then return end
    if tex.SetTexture then tex:SetTexture(nil) end
    if tex.SetAlpha then tex:SetAlpha(0) end
    if tex.Hide then tex:Hide() end
end

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-- Button Styling
--------------------------------------------------------------------------------
local MENU_BUTTON_ICONS = {
    ["GameMenuButtonContinue"]     = "exit",
    ["GameMenuButtonOptions"]      = "settings",
    ["GameMenuButtonSoundOptions"] = "sound",
    ["GameMenuButtonUIOptions"]    = "talent",
    ["GameMenuButtonKeybindings"]  = "menu",
    ["GameMenuButtonRatings"]      = "backpack",
    ["GameMenuButtonMacros"]       = "ai",
    ["GameMenuButtonLogout"]       = "close",
    ["GameMenuButtonQuit"]         = "logout",
}

local function StyleMenuButton(btn)
    if not btn or btn.nanamiStyled then return end
    btn.nanamiStyled = true

    HideTexture(btn:GetNormalTexture())
    HideTexture(btn:GetPushedTexture())
    HideTexture(btn:GetHighlightTexture())
    HideTexture(btn:GetDisabledTexture())

    local name = btn:GetName() or ""
    for _, suffix in ipairs({ "Left", "Right", "Middle" }) do
        local tex = _G[name .. suffix]
        if tex then tex:SetAlpha(0); tex:Hide() end
    end

    SetRoundBackdrop(btn, T.btnBg, T.btnBorder)
    btn:SetWidth(BUTTON_W)
    btn:SetHeight(BUTTON_H)

    local iconKey = MENU_BUTTON_ICONS[name]
    local icoSize = 12
    local gap = 4
    local fs = btn:GetFontString()
    if fs then
        fs:SetFont(GetFont(), 11, "OUTLINE")
        fs:SetTextColor(T.btnText[1], T.btnText[2], T.btnText[3])
        fs:ClearAllPoints()
        if iconKey and SFrames and SFrames.CreateIcon then
            local ico = SFrames:CreateIcon(btn, iconKey, icoSize)
            ico:SetDrawLayer("OVERLAY")
            ico:SetVertexColor(T.btnText[1], T.btnText[2], T.btnText[3])
            fs:SetPoint("CENTER", btn, "CENTER", (icoSize + gap) / 2, 0)
            ico:SetPoint("RIGHT", fs, "LEFT", -gap, 0)
            btn.nanamiIcon = ico
        else
            fs:SetPoint("CENTER", btn, "CENTER", 0, 0)
        end
    end

    local origEnter = btn:GetScript("OnEnter")
    local origLeave = btn:GetScript("OnLeave")
    local origDown  = btn:GetScript("OnMouseDown")
    local origUp    = btn:GetScript("OnMouseUp")

    btn:SetScript("OnEnter", function()
        if origEnter then origEnter() end
        this:SetBackdropColor(T.btnHoverBg[1], T.btnHoverBg[2], T.btnHoverBg[3], T.btnHoverBg[4])
        this:SetBackdropBorderColor(T.btnHoverBorder[1], T.btnHoverBorder[2], T.btnHoverBorder[3], T.btnHoverBorder[4])
        local txt = this:GetFontString()
        if txt then txt:SetTextColor(T.btnActiveText[1], T.btnActiveText[2], T.btnActiveText[3]) end
        if this.nanamiIcon then this.nanamiIcon:SetVertexColor(T.btnActiveText[1], T.btnActiveText[2], T.btnActiveText[3]) end
    end)

    btn:SetScript("OnLeave", function()
        if origLeave then origLeave() end
        this:SetBackdropColor(T.btnBg[1], T.btnBg[2], T.btnBg[3], T.btnBg[4])
        this:SetBackdropBorderColor(T.btnBorder[1], T.btnBorder[2], T.btnBorder[3], T.btnBorder[4])
        local txt = this:GetFontString()
        if txt then txt:SetTextColor(T.btnText[1], T.btnText[2], T.btnText[3]) end
        if this.nanamiIcon then this.nanamiIcon:SetVertexColor(T.btnText[1], T.btnText[2], T.btnText[3]) end
    end)

    btn:SetScript("OnMouseDown", function()
        if origDown then origDown() end
        this:SetBackdropColor(T.btnDownBg[1], T.btnDownBg[2], T.btnDownBg[3], T.btnDownBg[4])
    end)

    btn:SetScript("OnMouseUp", function()
        if origUp then origUp() end
        this:SetBackdropColor(T.btnHoverBg[1], T.btnHoverBg[2], T.btnHoverBg[3], T.btnHoverBg[4])
    end)
end

--------------------------------------------------------------------------------
-- Create Settings Button
--------------------------------------------------------------------------------
local settingsBtn

local function CreateSettingsButton(parent)
    if settingsBtn then return settingsBtn end

    local btn = CreateFrame("Button", "GameMenuButtonNanamiUI", parent)
    btn:SetWidth(BUTTON_W)
    btn:SetHeight(BUTTON_H)
    SetRoundBackdrop(btn, T.btnBg, T.btnBorder)

    local icoSize = 14
    local gap = 4

    local fs = btn:CreateFontString(nil, "OVERLAY")
    fs:SetFont(GetFont(), 11, "OUTLINE")
    fs:SetTextColor(T.btnText[1], T.btnText[2], T.btnText[3])
    fs:SetPoint("CENTER", btn, "CENTER", (icoSize + gap) / 2, 0)
    fs:SetText("Nanami-UI 设置")

    local ico = SFrames:CreateIcon(btn, "logo", icoSize)
    ico:SetDrawLayer("OVERLAY")
    ico:SetVertexColor(T.btnText[1], T.btnText[2], T.btnText[3])
    ico:SetPoint("RIGHT", fs, "LEFT", -gap, 0)
    btn.nanamiIcon = ico

    btn:SetScript("OnClick", function()
        HideUIPanel(GameMenuFrame)
        if SFrames.ConfigUI and SFrames.ConfigUI.Build then
            SFrames.ConfigUI:Build("ui")
        end
    end)

    btn:SetScript("OnEnter", function()
        this:SetBackdropColor(T.btnHoverBg[1], T.btnHoverBg[2], T.btnHoverBg[3], T.btnHoverBg[4])
        this:SetBackdropBorderColor(T.btnHoverBorder[1], T.btnHoverBorder[2], T.btnHoverBorder[3], T.btnHoverBorder[4])
        fs:SetTextColor(T.btnActiveText[1], T.btnActiveText[2], T.btnActiveText[3])
        ico:SetVertexColor(T.btnActiveText[1], T.btnActiveText[2], T.btnActiveText[3])
    end)

    btn:SetScript("OnLeave", function()
        this:SetBackdropColor(T.btnBg[1], T.btnBg[2], T.btnBg[3], T.btnBg[4])
        this:SetBackdropBorderColor(T.btnBorder[1], T.btnBorder[2], T.btnBorder[3], T.btnBorder[4])
        fs:SetTextColor(T.btnText[1], T.btnText[2], T.btnText[3])
        ico:SetVertexColor(T.btnText[1], T.btnText[2], T.btnText[3])
    end)

    btn:SetScript("OnMouseDown", function()
        this:SetBackdropColor(T.btnDownBg[1], T.btnDownBg[2], T.btnDownBg[3], T.btnDownBg[4])
    end)

    btn:SetScript("OnMouseUp", function()
        this:SetBackdropColor(T.btnHoverBg[1], T.btnHoverBg[2], T.btnHoverBg[3], T.btnHoverBg[4])
    end)

    btn.nanamiStyled = true
    settingsBtn = btn
    return btn
end

--------------------------------------------------------------------------------
-- Known button priority order (covers vanilla + Turtle WoW extras)
--------------------------------------------------------------------------------
local BUTTON_ORDER = {
    "GameMenuButtonContinue",
    "__NANAMI_SETTINGS__",
    "GameMenuButtonOptions",
    "GameMenuButtonSoundOptions",
    "GameMenuButtonUIOptions",
    "GameMenuButtonKeybindings",
    "GameMenuButtonRatings",
    "GameMenuButtonMacros",
    "GameMenuButtonLogout",
    "GameMenuButtonQuit",
}

--------------------------------------------------------------------------------
-- Frame Styling (called once at PLAYER_LOGIN, before first show)
--------------------------------------------------------------------------------
local styled = false

local function StyleGameMenuFrame()
    if styled then return end
    if not GameMenuFrame then return end
    styled = true

    -- Hide all default background textures and header text
    local regions = { GameMenuFrame:GetRegions() }
    for _, region in ipairs(regions) do
        if region then
            local otype = region:GetObjectType()
            if otype == "Texture" then
                region:SetTexture(nil)
                region:SetAlpha(0)
                region:Hide()
            elseif otype == "FontString" then
                region:SetAlpha(0)
                region:Hide()
            end
        end
    end

    SetRoundBackdrop(GameMenuFrame, T.panelBg, T.panelBorder)
    CreateShadow(GameMenuFrame, 5)

    -- Title
    local title = GameMenuFrame:CreateFontString(nil, "OVERLAY")
    title:SetFont(GetFont(), 13, "OUTLINE")
    title:SetTextColor(T.titleColor[1], T.titleColor[2], T.titleColor[3])
    title:SetPoint("TOP", GameMenuFrame, "TOP", 0, -11)
    title:SetText("Nanami-UI")

    -- Create settings button
    local sBt = CreateSettingsButton(GameMenuFrame)

    -- Build a lookup of known names for quick check
    local knownSet = {}
    for _, name in ipairs(BUTTON_ORDER) do
        if name ~= "__NANAMI_SETTINGS__" then
            knownSet[name] = true
        end
    end

    -- Collect all child buttons that are NOT the settings button
    local children = { GameMenuFrame:GetChildren() }
    local unknownBtns = {}
    for _, child in ipairs(children) do
        if child and child:GetObjectType() == "Button" and child ~= sBt then
            local cname = child:GetName()
            if cname and not knownSet[cname] then
                table.insert(unknownBtns, child)
            end
        end
    end

    -- Build final ordered button list from BUTTON_ORDER
    local orderedBtns = {}
    for _, name in ipairs(BUTTON_ORDER) do
        if name == "__NANAMI_SETTINGS__" then
            table.insert(orderedBtns, sBt)
        else
            local btn = _G[name]
            if btn then
                StyleMenuButton(btn)
                table.insert(orderedBtns, btn)
            end
        end
    end

    -- Append unknown / Turtle WoW extra buttons before Logout & Quit
    local insertBefore = table.getn(orderedBtns)
    for i = table.getn(orderedBtns), 1, -1 do
        local bname = orderedBtns[i]:GetName() or ""
        if bname == "GameMenuButtonLogout" or bname == "GameMenuButtonQuit" then
            insertBefore = i
        else
            break
        end
    end
    for _, btn in ipairs(unknownBtns) do
        StyleMenuButton(btn)
        table.insert(orderedBtns, insertBefore, btn)
        insertBefore = insertBefore + 1
    end

    -- Layout vertically
    local numBtns = table.getn(orderedBtns)
    local totalH  = numBtns * BUTTON_H + (numBtns - 1) * BUTTON_GAP
    local frameH  = HEADER_H + SIDE_PAD + totalH + SIDE_PAD
    local frameW  = BUTTON_W + SIDE_PAD * 2

    GameMenuFrame:SetWidth(frameW)
    GameMenuFrame:SetHeight(frameH)

    local startY = -(HEADER_H + SIDE_PAD)
    for i, btn in ipairs(orderedBtns) do
        btn:ClearAllPoints()
        btn:SetPoint("TOP", GameMenuFrame, "TOP", 0, startY - (i - 1) * (BUTTON_H + BUTTON_GAP))
    end
end

--------------------------------------------------------------------------------
-- Hook: style at login, BEFORE any show (avoids OnShow size-change issues)
--------------------------------------------------------------------------------
local hookFrame = CreateFrame("Frame")
hookFrame:RegisterEvent("PLAYER_LOGIN")
hookFrame:SetScript("OnEvent", function()
    if GameMenuFrame then
        StyleGameMenuFrame()
    end
end)