Util.lua

local Name, Addon = ...

function Addon.IsNPC(guid)
    return guid and guid:sub(1, 8) == "Creature"
end

function Addon.GetNPCId(guid)
    return tonumber(select(6, ("-"):split(guid)), 10)
end

function Addon.GetInstanceDungeonId(instance)
    if instance then
        for id,enemies in pairs(MDT.dungeonEnemies) do
            for _,enemy in pairs(enemies) do
                if enemy.instanceID == instance then
                    return id
                end
            end
        end
    end
end

function Addon.GetCurrentDungeonId()
    return MDT:GetDB().currentDungeonIdx
end

function Addon.IsCurrentInstance()
    return Addon.currentDungeon == Addon.GetCurrentDungeonId()
end

function Addon.GetDungeonScale(dungeon)
    return MDT.scaleMultiplier[dungeon or Addon.GetCurrentDungeonId()] or 1
end

function Addon.GetCurrentEnemies()
    return MDT.dungeonEnemies[Addon.GetCurrentDungeonId()]
end

function Addon.GetCurrentPulls()
    return MDT:GetCurrentPreset().value.pulls
end

function Addon.IteratePull(pull, fn, ...)
    local enemies = Addon.GetCurrentEnemies()

    if type(pull) == "number" then
        pull = Addon.GetCurrentPulls()[pull]
    end

    for enemyId,clones in pairs(pull) do
        local enemy = enemies[enemyId]
        if enemy then
            for _,cloneId in pairs(clones) do
                if MDT:IsCloneIncluded(enemyId, cloneId) then
                    local a, b = fn(enemy.clones[cloneId], enemy, cloneId, enemyId, pull, ...)
                    if a then return a, b end
                end
            end
        end
    end
end

function Addon.IteratePulls(fn, ...)
    for i,pull in ipairs(Addon.GetCurrentPulls()) do
        local a, b = Addon.IteratePull(pull, fn, i, ...)
        if a then return a, b end
    end
end

function Addon.GetPullRect(pull, level)
    local minX, minY, maxX, maxY
    Addon.IteratePull(pull, function (clone)
        local sub, x, y = clone.sublevel, clone.x, clone.y
        if sub == level then
            minX, minY = min(minX or x, x), min(minY or y, y)
            maxX, maxY = max(maxX or x, x), max(maxY or y, y)
        end
    end)
    return minX, minY, maxX, maxY
end

function Addon.ExtendRect(minX, minY, maxX, maxY, left, top, right, bottom)
    if minX and left then
        top = top or left
        right = right or left
        bottom = bottom or top
        return max(0, minX - left), min(0, minY - top), maxX + right, maxY + bottom
    end
end

function Addon.CombineRects(minX, minY, maxX, maxY, minX2, minY2, maxX2, maxY2)
    if minX and minX2 then
        local diffX, diffY = max(0, minX - minX2, maxX2 - maxX), max(0, minY - minY2, maxY2 - maxY)
        return Addon.ExtendRect(minX, minY, maxX, maxY, diffX, diffY)
    end
end

function Addon.GetBestSubLevel(pull)
    local currSub, minDiff = MDT:GetCurrentSubLevel()
    Addon.IteratePull(pull, function (clone)
        local diff = clone.sublevel - currSub
        if not minDiff or abs(diff) < abs(minDiff) or abs(diff) == abs(minDiff) and diff < minDiff then
            minDiff = diff
        end
        return minDiff == 0
    end)
    return minDiff and currSub + minDiff
end

function Addon.GetLastSubLevel(pull)
    local sublevel
    Addon.IteratePull(pull, function (clone) sublevel = clone.sublevel or sublevel end)
    return sublevel
end

function Addon.FindWhere(tbl, key1, val1, key2, val2)
    for i,v in pairs(tbl) do
        if v[key1] == val1 and (not key2 or v[key2] == val2) then
            return v, i
        end
    end
end

Addon.Debug = function (...)
    if Addon.DEBUG then print(...) end
end

Addon.Echo = function (title, line, ...)
    print("|cff00bbbb[MDTGuide]|r " .. (title and title ..": " or "") .. (line or ""), ...)
end

Addon.Chat = function (msg)
    if IsInGroup() then
        SendChatMessage(msg, IsInGroup(LE_PARTY_CATEGORY_INSTANCE) and "INSTANCE_CHAT" or "PARTY")
    else
        Addon.Echo(nil, msg)
    end
end