local Core = LibStub("AceAddon-3.0"):GetAddon("BasicUI")
local Module = Core:NewModule("Unitframes", "AceEvent-3.0")

----------------
-- Unitframes --
----------------

local CUSTOM_FACTION_BAR_COLORS = {
    [1] = {r = 1, g = 0, b = 0},
    [2] = {r = 1, g = 0, b = 0},
    [3] = {r = 1, g = 1, b = 0},
    [4] = {r = 1, g = 1, b = 0},
    [5] = {r = 0, g = 1, b = 0},
    [6] = {r = 0, g = 1, b = 0},
    [7] = {r = 0, g = 1, b = 0},
    [8] = {r = 0, g = 1, b = 0},
}

-- Font Style
local shorts = {
    { 1e10, 1e9, "%.0fB" }, --  10b+ as  12b
    {  1e9, 1e9, "%.1fB" }, --   1b+ as 8.3b
    {  1e7, 1e6, "%.0fM" }, --  10m+ as  14m
    {  1e6, 1e6, "%.1fM" }, --   1m+ as 7.4m
    {  1e5, 1e3, "%.0fK" }, -- 100k+ as 840k
    {  1e3, 1e3, "%.1fK" }, --   1k+ as 2.5k
    {    0,   1,    "%d" }, -- < 1k  as  974
}
for i = 1, #shorts do
    shorts[i][4] = shorts[i][3] .. " (%.0f%%)"
end

------------------------------------------------------------------------

local db, enabled

function Module:OnEnable()
    if InCombatLockdown() then
        return self:RegisterEvent("PLAYER_REGEN_ENABLED", "OnEnable")
    end
    self:UnregisterEvent("PLAYER_REGEN_ENABLED")

    db = Core.db.profile

    if enabled or not db.unitframes.enable then return end
    enabled = true -- since most of this stuff is non-undoable (eg. hooksecurefunc)

    -- Update Unit Frames
    self:ApplySettings()

    -- Disable healing/damage spam over player/pet frame:
    PlayerHitIndicator:SetText(nil)
    PlayerHitIndicator.SetText = function() end
    PetHitIndicator:SetText(nil)
    PetHitIndicator.SetText = function() end

    -- Change other frames' name backgrounds to match player frame
    for _, region in pairs({
        TargetFrameNameBackground,
        FocusFrameNameBackground,
        Boss1TargetFrameNameBackground,
        Boss2TargetFrameNameBackground,
        Boss3TargetFrameNameBackground,
        Boss4TargetFrameNameBackground,
    }) do
        region:SetTexture(0, 0, 0, 0.5)
    end

    -- Font Style / Color thanks to Phanx from WoWinterface.
    hooksecurefunc("TextStatusBar_UpdateTextStringWithValues", function(statusBar, fontString, value, valueMin, valueMax)
        if value == 0 then
            return fontString:SetText("")
        end

        local style = GetCVar("statusTextDisplay")
        if style == "PERCENT" then
            return fontString:SetFormattedText("%.0f%%", value / valueMax * 100)
        end
        for i = 1, #shorts do
            local t = shorts[i]
            if value >= t[1] then
                if style == "BOTH" then
                    return fontString:SetFormattedText(t[4], value / t[2], value / valueMax * 100)
                else
                    if value < valueMax then
                        for j = 1, #shorts do
                            local v = shorts[j]
                            if valueMax >= v[1] then
                                return fontString:SetFormattedText(t[3] .. " / " .. v[3], value / t[2], valueMax / v[2])
                            end
                        end
                    end
                    return fontString:SetFormattedText(t[3], value / t[2])
                end
            end
        end
    end)

    -- Font Color
    hooksecurefunc("UnitFrame_Update", function(self, isParty)
        if not self.name or not self:IsShown() then return end

        local PET_COLOR = { r = 157/255, g = 197/255, b = 255/255 }
        local unit, color = self.unit
        if UnitPlayerControlled(unit) then
            if UnitIsPlayer(unit) then
                local _, class = UnitClass(unit)
                color = (CUSTOM_CLASS_COLORS or RAID_CLASS_COLORS)[class]
            else
                color = PET_COLOR
            end
        elseif UnitIsDeadOrGhost(unit) or UnitIsTapped(unit) and not UnitIsTappedByPlayer(unit) then
            color = GRAY_FONT_COLOR
        else
            color = CUSTOM_FACTION_BAR_COLORS[UnitIsEnemy(unit, "player") and 1 or UnitReaction(unit, "player") or 5]
        end

        if not color then
            color = (CUSTOM_CLASS_COLORS or RAID_CLASS_COLORS)["PRIEST"]
        end

        self.name:SetTextColor(color.r, color.g, color.b)
        if isParty then
            self.name:SetText(GetUnitName(self.overrideName or unit))
        end
    end)
end

function Module:ApplySettings(event)
    if event then
        self:UnregisterEvent(event)
    end

    if InCombatLockdown() then
        return self:RegisterEvent("PLAYER_REGEN_ENABLED", "ApplySettings")
    end

    local failure
    for unit, func in pairs(self.UnitFunctions) do
        if db.unitframes[unit].enable then
            if func(self) then
                failure = true
            end
        end
    end

    if failure then
        self:RegisterEvent("ADDON_LOADED", "ApplySettings")
    end
end

------------------------------------------------------------------------

Module.UnitFunctions = {

    player = function(self)
        PlayerFrame:SetScale(db.unitframes.player.scale)
        PlayerFrameHealthBarText:SetFont(db.media.fontNormal, db.unitframes.player.fontSize,"THINOUTLINE")
        PlayerFrameManaBarText:SetFont(db.media.fontNormal, db.unitframes.player.fontSize, "THINOUTLINE")
        PlayerFrameAlternateManaBarText:SetFont(db.media.fontNormal, db.unitframes.player.fontSize, "THINOUTLINE")

        PetFrameHealthBarText:SetFont(db.media.fontNormal, db.unitframes.player.fontSizepet,"THINOUTLINE")
        PetFrameManaBarText:SetFont(db.media.fontNormal, db.unitframes.player.fontSizepet, "THINOUTLINE")
    end,

    target = function(self)
        TargetFrame:SetScale(db.unitframes.target.scale)
        TargetFrameTextureFrameHealthBarText:SetFont(db.media.fontNormal, db.unitframes.target.fontSize, "THINOUTLINE")
        TargetFrameTextureFrameManaBarText:SetFont(db.media.fontNormal, db.unitframes.target.fontSize, "THINOUTLINE")
    end,

    focus = function(self)
        FocusFrame:SetScale(db.unitframes.focus.scale)
        FocusFrameTextureFrameHealthBarText:SetFont(db.media.fontNormal, db.unitframes.focus.fontSize,"THINOUTLINE")
        FocusFrameTextureFrameManaBarText:SetFont(db.media.fontNormal, db.unitframes.focus.fontSize,"THINOUTLINE")
    end,

    party = function(self)
        for i = 1, MAX_PARTY_MEMBERS do
            local partyFrame = "PartyMemberFrame"..i
            _G[partyFrame]:SetScale(db.unitframes.party.scale)
            _G[partyFrame.."HealthBarText"]:SetFont(db.media.fontNormal, db.unitframes.party.fontSize, "THINOUTLINE")
            _G[partyFrame.."ManaBarText"]:SetFont(db.media.fontNormal, db.unitframes.party.fontSize, "THINOUTLINE")
        end
    end,

    arena = function(self)
        if not ArenaEnemyFrame1 then
            return true
        end

        for i = 1, MAX_ARENA_ENEMIES do
            local prepFrame = "ArenaPrepFrame"..i
            _G[prepFrame]:SetScale(db.unitframes.arena.scale)
            _G[prepFrame.."HealthBarText"]:SetFont(db.media.fontNormal, db.unitframes.arena.fontSize,"THINOUTLINE")
            _G[prepFrame.."ManaBarText"]:SetFont(db.media.fontNormal, db.unitframes.arena.fontSize, "THINOUTLINE")

            local arenaFrame = "ArenaEnemyFrame"..i
            _G[arenaFrame]:SetScale(db.unitframes.arena.scale)
            _G[arenaFrame.."HealthBarText"]:SetFont(db.media.fontNormal, db.unitframes.arena.fontSize,"THINOUTLINE")
            _G[arenaFrame.."ManaBarText"]:SetFont(db.media.fontNormal, db.unitframes.arena.fontSize, "THINOUTLINE")
        end
    end,

    boss = function(self)
        for i = 1, MAX_BOSS_FRAMES do
            local bossFrame = "Boss"..i.."TargetFrame"
            _G[bossFrame]:SetScale(db.unitframes.boss.scale)
        end
    end,

}