local E, L, V, P, G = unpack(ElvUI)
local AB = E:GetModule('ActionBars')

local _G = _G
local next = next
local wipe = wipe
local gsub = gsub
local unpack = unpack
local tinsert = tinsert
local CreateFrame = CreateFrame
local RegisterStateDriver = RegisterStateDriver
local InCombatLockdown = InCombatLockdown
local hooksecurefunc = hooksecurefunc

AB.MICRO_CLASSIC = {}
AB.MICRO_BUTTONS = _G.MICRO_BUTTONS or {
	'CharacterMicroButton',
	'SpellbookMicroButton',
	'TalentMicroButton',
	'AchievementMicroButton',
	'QuestLogMicroButton',
	'GuildMicroButton',
	'LFDMicroButton',
	'EJMicroButton',
	'CollectionsMicroButton',
	'MainMenuMicroButton',
	'HelpMicroButton',
	'StoreMicroButton',
}

do
	local meep = 12.125
	AB.MICRO_OFFSETS = {
		CharacterMicroButton	= 0.07 / meep,
		SpellbookMicroButton	= 1.05 / meep,
		ProfessionMicroButton	= 1.05 / meep,
		TalentMicroButton		= 2.04 / meep,
		PlayerSpellsMicroButton = 2.04 / meep,
		AchievementMicroButton	= 3.03 / meep,
		QuestLogMicroButton		= 4.02 / meep,
		GuildMicroButton		= 5.01 / meep, -- Retail
		SocialsMicroButton		= 5.01 / meep, -- Classic, use Guild button
		LFDMicroButton			= 6.00 / meep, -- Retail
		LFGMicroButton			= 6.00 / meep, -- Classic
		EJMicroButton			= 7.00 / meep,
		CollectionsMicroButton	= 8.00 / meep,
		MainMenuMicroButton		= (E.Classic and 10 or 9) / meep, -- flip these
		HelpMicroButton			= (E.Classic and 9 or 10) / meep, -- on classic
		StoreMicroButton		= 10.0 / meep,
		HousingMicroButton		= 11.0 / meep
	}
end

local microBar = CreateFrame('Frame', 'ElvUI_MicroBar', E.UIParent)
microBar:SetSize(100, 100)

local function OnLeaveBar()
	return AB.db.microbar.mouseover and E:UIFrameFadeOut(microBar, 0.2, microBar:GetAlpha(), 0)
end

local watcher = 0
local function OnUpdate(self, elapsed)
	if watcher > 0.1 then
		if not self:IsMouseOver() then
			self.IsMouseOvered = nil
			self:SetScript('OnUpdate', nil)
			OnLeaveBar()
		end
		watcher = 0
	else
		watcher = watcher + elapsed
	end
end

local function OnEnter(button)
	if AB.db.microbar.mouseover and not microBar.IsMouseOvered then
		microBar.IsMouseOvered = true
		microBar:SetScript('OnUpdate', OnUpdate)
		E:UIFrameFadeIn(microBar, 0.2, microBar:GetAlpha(), AB.db.microbar.alpha)
	end

	if button:IsEnabled() then
		button:SetBackdropBorderColor(unpack(E.media.rgbvaluecolor))
	end

	-- when we skin it the normal isn't baked into the highlight texture so readd it
	local normal = button.GetNormalTexture and button:GetNormalTexture()
	if normal then
		normal:SetAlpha(1)
	end

	-- bag keybind support from actionbar module
	if E.private.actionbar.enable then
		AB:BindUpdate(button, 'MICRO')
	end
end

local function OnLeave(button)
	if button:IsEnabled() then
		button:SetBackdropBorderColor(unpack(E.media.bordercolor))
	end
end

function AB:GetMicroCoords(name, icons, character)
	local l, r, t, b = 0.17, 0.87, 0.5, 0.908

	if name == 'PVPMicroButton' or (character and name == 'CharacterMicroButton') then
		l, r, t, b = 0, 1, 0, 1
	elseif E.Retail or icons then
		local offset = AB.MICRO_OFFSETS[name]
		if offset then
			l, r = offset, offset + 0.065
			t, b = icons and 0.41 or 0.038, icons and 0.72 or 0.35
		end
	end

	return l, r, t, b
end

function AB:HandleMicroCoords(button, name)
	local l, r, t, b = AB:GetMicroCoords(name, AB.db.microbar.useIcons, not E.Retail)

	local normal = button.GetNormalTexture and button:GetNormalTexture()
	if normal then
		normal:SetTexCoord(l, r, t, b)

		local pushed = button.GetPushedTexture and button:GetPushedTexture()
		pushed:SetTexCoord(l, r, t, b)
	end

	if button.FlashBorder then
		button.FlashBorder:SetTexCoord(l, r, t, b)
	end

	local disabled = button.GetDisabledTexture and button:GetDisabledTexture()
	if disabled then
		disabled:SetTexCoord(l, r, t, b)
	end
end

function AB:HandleMicroTextures(button, name)
	local highlight = button.GetHighlightTexture and button:GetHighlightTexture()
	if highlight then
		highlight:SetColorTexture(1, 1, 1, 0.2)
	end

	local normal = button.GetNormalTexture and button:GetNormalTexture()
	if not normal then -- no pushed yet either, probably character
		local pushed = button.GetPushedTexture and button:GetPushedTexture()
		if not pushed then
			button:SetPushedTexture(E.Media.Textures.White8x8)

			pushed = button.GetPushedTexture and button:GetPushedTexture()
			pushed:SetDrawLayer('OVERLAY', 1)
			pushed:SetAlpha(0.2)
			pushed:SetInside()
		end

		local color = E.media.rgbvaluecolor
		if color then
			pushed:SetVertexColor(color.r, color.g, color.b)
		end
	else
		local icons = AB.db.microbar.useIcons
		local character = not E.Retail and name == 'CharacterMicroButton' and E.Media.Textures.Black8x8
		local faction = name == 'PVPMicroButton' and ((E.myfaction == 'Horde' and E.Media.Textures.PVPHorde) or E.Media.Textures.PVPAlliance)
		local texture = faction or (not character and AB.MICRO_OFFSETS[name] and E.Media.Textures.MicroBar)
		local stock = not E.Retail and not icons and AB.MICRO_CLASSIC[name] -- classic default icons from the game
		local pushed = button.GetPushedTexture and button:GetPushedTexture()
		if stock then
			normal:SetTexture(faction or stock.normal)
			pushed:SetTexture(character or faction or stock.pushed)
		elseif texture then
			normal:SetTexture(texture)
			pushed:SetTexture(character or texture)
		elseif character then
			normal:SetTexture()
			pushed:SetTexture(character)
		end

		if character then
			pushed:SetDrawLayer('OVERLAY', 1)
			pushed:SetBlendMode('ADD')
			pushed:SetAlpha(0.25)
		end

		normal:SetInside(button)
		pushed:SetInside(button)

		local color = E.media.rgbvaluecolor
		if color then
			pushed:SetVertexColor(color.r * 1.5, color.g * 1.5, color.b * 1.5)
		end

		local disabled = button.GetDisabledTexture and button:GetDisabledTexture()
		if disabled then
			if stock and stock.disabled then
				disabled:SetTexture(stock.disabled)
			else
				disabled:SetTexture(texture or nil)
			end

			disabled:SetDesaturated(true)
			disabled:SetInside(button)
		end

		if button.FlashBorder then
			button.FlashBorder:SetInside(button)

			if icons then
				button.FlashBorder:SetTexture(stock and (faction or stock.normal) or texture or character or nil)
			else
				button.FlashBorder:SetColorTexture(1, 1, 1, 0.2)
			end
		end
	end

	if button.PushedBackground then button.PushedBackground:SetTexture() end
	if button.PushedShadow then button.PushedShadow:SetTexture() end
	if button.FlashContent then button.FlashContent:SetTexture() end
	if button.Background then button.Background:SetTexture() end
	if button.Flash then button.Flash:SetTexture() end

	if button.PortraitMask then
		button.PortraitMask:Hide()
	end
end

function AB:HandleMicroButton(button, name)
	button:SetTemplate()
	button:HookScript('OnEnter', OnEnter)
	button:HookScript('OnLeave', OnLeave)
	button:SetHitRectInsets(0, 0, 0, 0)

	if not E.Retail then
		local pushed = button.GetPushedTexture and button:GetPushedTexture()
		local normal = button.GetNormalTexture and button:GetNormalTexture()
		local disabled = button.GetDisabledTexture and button:GetDisabledTexture()

		AB.MICRO_CLASSIC[name] = {
			pushed = pushed and pushed:GetTexture() or nil,
			normal = normal and normal:GetTexture() or nil,
			disabled = disabled and disabled:GetTexture() or nil
		}
	end

	AB:UpdateMicroButtonTexture(name)
end

function AB:UpdateMicroBarVisibility()
	if InCombatLockdown() then
		AB.NeedsUpdateMicroBarVisibility = true
		AB:RegisterEvent('PLAYER_REGEN_ENABLED')
		return
	end

	local visibility = gsub(AB.db.microbar.visibility, '[\n\r]', '')
	RegisterStateDriver(microBar.visibility, 'visibility', (AB.db.microbar.enabled and visibility) or 'hide')
end

function AB:UpdateMicroButtonTexture(name)
	local button = _G[name]
	if not button then return end

	AB:HandleMicroTextures(button, name)
	AB:HandleMicroCoords(button, name)
end

function AB:UpdateMicroBarTextures()
	for _, name in next, AB.MICRO_BUTTONS do
		AB:UpdateMicroButtonTexture(name)
	end
end

function AB:UpdateMicroButtonsParent()
	for _, name in next, AB.MICRO_BUTTONS do
		local button = _G[name]
		if button then
			button:SetParent(microBar)
		end
	end
end

do
	local unsorted = {}
	local sorted = {}
	local sorting = {
		-- order this as a safe way to fix glyph taint on mists, warning: adjusting this can lead to
		-- action failed because cannot anchor to a region dependent on it (Mists/MainMenuBarMicroButtons.lua:133)
		MainMenuMicroButton = E.Retail and 11 or 12,	-- important for note above
		StoreMicroButton = E.Retail and 10 or 11,		-- important for note above
		EJMicroButton = E.Retail and 9 or 10,
		CollectionsMicroButton = E.Retail and 8 or 9
	}

	function AB:ShownMicroButtons()
		wipe(unsorted)
		wipe(sorted)

		for _, name in next, AB.MICRO_BUTTONS do
			local button = _G[name]
			if button and button:IsShown() then
				local order = sorting[name]
				if order then
					tinsert(unsorted, order, name)
				else
					tinsert(unsorted, name)
				end
			end
		end

		for _, name in next, unsorted do
			tinsert(sorted, name)
		end

		return sorted
	end
end

do
	local commandKeys = {
		CharacterMicroButton = 'TOGGLECHARACTER0',
		SpellbookMicroButton = 'TOGGLESPELLBOOK',
		TalentMicroButton = 'TOGGLETALENTS',
		AchievementMicroButton = 'TOGGLEACHIEVEMENT',
		QuestLogMicroButton = 'TOGGLEQUESTLOG',
		GuildMicroButton = 'TOGGLEGUILDTAB',
		LFDMicroButton = 'TOGGLEGROUPFINDER',
		CollectionsMicroButton = 'TOGGLECOLLECTIONS',
		EJMicroButton = 'TOGGLEENCOUNTERJOURNAL',
		MainMenuMicroButton = 'TOGGLEGAMEMENU',
		StoreMicroButton = nil, -- special

		-- tbc specific
		SocialsMicroButton = 'TOGGLESOCIAL',
		WorldMapMicroButton = 'TOGGLEWORLDMAP',
		HelpMicroButton = nil, -- special
	}

	function AB:UpdateMicroButtons()
		local db = AB.db.microbar
		microBar.db = db

		microBar.backdrop:SetShown(db.backdrop)
		microBar.backdrop:ClearAllPoints()

		AB:MoverMagic(microBar)

		local btns = AB:ShownMicroButtons()
		db.buttons = #btns

		local buttonsPerRow = db.buttonsPerRow
		local backdropSpacing = db.backdropSpacing

		local _, horizontal, anchorUp, anchorLeft = AB:GetGrowth(db.point)
		local lastButton, anchorRowButton = microBar
		for i, name in next, btns do
			local button = _G[name]

			local columnIndex = i - buttonsPerRow
			local columnName = btns[columnIndex]
			local columnButton = _G[columnName]

			if not E.Retail then
				button.commandName = commandKeys[name] -- to support KB like retail
			end

			button.db = db

			if i == 1 or i == buttonsPerRow then
				anchorRowButton = button
			end

			button.handleBackdrop = true -- keep over HandleButton
			AB:HandleButton(microBar, button, i, lastButton, columnButton)

			lastButton = button
		end

		microBar:SetAlpha((db.mouseover and not microBar.IsMouseOvered and 0) or db.alpha)

		AB:HandleBackdropMultiplier(microBar, backdropSpacing, db.buttonSpacing, db.widthMult, db.heightMult, anchorUp, anchorLeft, horizontal, lastButton, anchorRowButton)
		AB:HandleBackdropMover(microBar, backdropSpacing)
		AB:HandleTicketButton()

		if microBar.mover then
			if db.enabled then
				E:EnableMover(microBar.mover.name)
			else
				E:DisableMover(microBar.mover.name)
			end
		end

		AB:UpdateMicroBarVisibility()
	end
end

function AB:HandleCharacterPortrait()
	self.Portrait:SetInside()
end

function AB:HasTicketButton()
	local microMenu = _G.MicroMenu
	if microMenu and microMenu.UpdateHelpTicketButtonAnchor then
		return microMenu
	end
end

function AB:HandleTicketButton()
	if AB:HasTicketButton() then
		AB:UpdateHelpTicketButtonAnchor()
	end
end

function AB:UpdateHelpTicketButtonAnchor()
	local ticket = _G.HelpOpenWebTicketButton
	if not ticket then return end

	local first = _G[AB.MICRO_BUTTONS[1]]
	if first then
		local db = AB.db.microbar
		local size = ((db.keepSizeRatio and db.buttonSize) or db.buttonHeight) or 20
		local height = (size * 0.5) + 7
		local _, y = first:GetCenter()
		local middle = E.screenHeight * 0.5

		ticket:ClearAllPoints()
		ticket:SetPoint('CENTER', first, 0, (y and y >= middle) and -height or height)
	end
end

function AB:MicroBar_PostDrag()
	AB:HandleTicketButton()
end

function AB:SetupMicroBar()
	microBar:CreateBackdrop(AB.db.transparent and 'Transparent', nil, nil, nil, nil, nil, nil, nil, 0)
	microBar:Point('TOPLEFT', E.UIParent, 'TOPLEFT', 4, -48)
	microBar:EnableMouse(false)

	microBar.visibility = CreateFrame('Frame', nil, E.UIParent, 'SecureHandlerStateTemplate')
	microBar.visibility:SetScript('OnShow', function() microBar:Show() end)
	microBar.visibility:SetScript('OnHide', function() microBar:Hide() end)

	for _, name in next, AB.MICRO_BUTTONS do
		local button = _G[name]
		if button then
			AB:HandleMicroButton(button, name)

			if E.Retail or (name == 'MainMenuMicroButton' or name == 'GuildMicroButton') then
				hooksecurefunc(button, (E.Retail and 'SetHighlightAtlas') or (E.Classic and 'SetPushedTexture') or 'SetHighlightTexture', function()
					AB:UpdateMicroButtonTexture(name)
				end)

				if name == 'CharacterMicroButton' then
					hooksecurefunc(button, 'SetPushed', AB.HandleCharacterPortrait)
					hooksecurefunc(button, 'SetNormal', AB.HandleCharacterPortrait)
				end
			elseif name == 'TalentMicroButton' and E.global.general.disableTutorialButtons and _G.TalentMicroButtonAlert then
				_G.TalentMicroButtonAlert:Kill()
			end
		end
	end

	-- With this method we might don't taint anything. Instead of using :Kill()
	local PerformanceBar = _G.MainMenuBarPerformanceBar or _G.MainMenuMicroButton.MainMenuBarPerformanceBar
	if PerformanceBar then
		PerformanceBar:SetAlpha(0)
		PerformanceBar:SetScale(0.00001)
	end

	AB:SecureHook('UpdateMicroButtons')

	local microMenu = AB:HasTicketButton()
	if microMenu then
		microMenu.UpdateHelpTicketButtonAnchor = E.noop -- prevent layout erroring
		hooksecurefunc(microMenu, 'UpdateHelpTicketButtonAnchor', AB.UpdateHelpTicketButtonAnchor)
	end

	if _G.ResetMicroMenuPosition then
		_G.ResetMicroMenuPosition()
	elseif _G.UpdateMicroButtonsParent then
		_G.UpdateMicroButtonsParent(microBar)
		AB:SecureHook('UpdateMicroButtonsParent')
	end

	if not E.Retail then
		hooksecurefunc('SetLookingForGroupUIAvailable', AB.UpdateMicroButtons)
	end

	if _G.MicroButtonPortrait then
		_G.MicroButtonPortrait:SetInside(_G.CharacterMicroButton)
	end

	if _G.PVPMicroButtonTexture then
		_G.PVPMicroButtonTexture:SetAlpha(0)
	end

	E:CreateMover(microBar, 'MicrobarMover', L["Micro Bar"], nil, nil, AB.MicroBar_PostDrag, 'ALL,ACTIONBARS', nil, 'actionbar,microbar')
end
