local _, NSI = ... -- Internal namespace

-- Function from WeakAuras, thanks rivers
function NSI:IterateGroupMembers(reversed, forceParty)
    local unit = (not forceParty and IsInRaid()) and 'raid' or 'party'
    local numGroupMembers = unit == 'party' and GetNumSubgroupMembers() or GetNumGroupMembers()
    local i = reversed and numGroupMembers or (unit == 'party' and 0 or 1)
    return function()
        local ret
        if i == 0 and unit == 'party' then
            ret = 'player'
        elseif i <= numGroupMembers and i > 0 then
            ret = unit .. i
        end
        i = i + (reversed and -1 or 1)
        return ret
    end
end

function NSI:Restricted()
    return C_Secrets.ShouldAurasBeSecret()
end

function NSI:Print(...)
    if NSRT.Settings["DebugLogs"] then
        if DevTool then
            local t = {...}
            local name = t[1]
            print("added", name, "to DevTool Logs")
            table.remove(t, 1)
            DevTool:AddData(t, name)
        else
            print(...)
        end
    end
end

function NSI:SortTable(t, reversed)
    table.sort(t, 
        function(a, b)
            if a.prio == b.prio then -- sort by GUID if same spec
                return (reversed and b.GUID > a.GUID) or a.GUID < b.GUID
            else
                return (reversed and a.prio > b.prio) or a.prio < b.prio
            end
    end) -- a < b low first, a > b high first
    return t
end

function NSAPI:Shorten(unit, num, specicon, AddonName, combined, roleicon) -- Returns color coded Name/Nickname
    local classFile = unit and select(2, UnitClass(unit))
    if specicon then
        local specid = 0
        if unit then specid = NSI:GetSpecs(unit) or 0 end
        local icon = select(4, GetSpecializationInfoByID(specid))
        if icon then 
            specicon = "\124T"..icon..":12:12:0:0:64:64:4:60:4:60\124t"
        elseif not roleicon then -- if we didn't get the specid can at least try to return the role icon unless that one was specifically requested as well
            specicon = UnitGroupRolesAssigned(unit)
            if specicon ~= "NONE" then
                specicon = CreateAtlasMarkup(GetIconForRole(specicon), 0, 0)
            else
                specicon = ""
            end
        else
            specicon = ""
        end
    else
        specicon = ""
    end
    if roleicon then
        roleicon = UnitGroupRolesAssigned(unit)
        if roleicon ~= "NONE" then
            roleicon = CreateAtlasMarkup(GetIconForRole(roleicon), 0, 0)
        else
            roleicon = ""
        end
    else
        roleicon = ""
    end
    if classFile then -- basically "if unit found"
        local name = UnitName(unit)
        local color = GetClassColorObj(classFile)
        name = num and NSI:Utf8Sub(NSAPI:GetName(name, AddonName), 1, num) or NSAPI:GetName(name, AddonName) -- shorten name before wrapping in color
        if color then -- should always be true anyway?
            return combined and specicon..roleicon..color:WrapTextInColorCode(name) or color:WrapTextInColorCode(name), combined and "" or specicon, combined and "" or roleicon
        else
            return combined and specicon..roleicon..name or name, combined and "" or specicon, combined and "" or roleicon
        end
    else
        return unit, "", "" -- return input if nothing was found
    end
end

function NSI:GetSpecs(unit)
    if unit then
        return NSI.specs[unit] or false -- return false if no information available for that unit so it goes to the next fallback
    else
        return NSI.specs -- if no unit is given then entire table is requested
    end
end


function NSI:GetNote() -- simply for note comparison now
    if not C_AddOns.IsAddOnLoaded("MRT") then
        return "empty"
    end
    if not VMRT.Note.Text1 then
        return "empty"
    end
    return _G.VMRT.Note.Text1 or ""
end

function NSI:DifficultyCheck(num) -- check if current difficulty is a Normal/Heroic/Mythic raid and also allow checking if we are currently in an encounter
    local difficultyID = select(3, GetInstanceInfo()) or 0    
    return ((difficultyID >= num and difficultyID <= 16 and difficultyID)) or (NSRT.Settings["Debug"] and 16)
end

function NSI:GetHash(text)
    local counter = 1
    local len = string.len(text)
    for i = 1, len, 3 do
        counter = math.fmod(counter*8161, 4294967279) +  -- 2^32 - 17: Prime!
                (string.byte(text,i)*16776193) +
                ((string.byte(text,i+1) or (len-i+256))*8372226) +
                ((string.byte(text,i+2) or (len-i+256))*3932164)
    end
    return math.fmod(counter, 4294967291) -- 2^32 - 5: Prime (and different from the prime in the loop)
end

-- keeping these two in global as I might want to use them elsewhere still
function NSAPI:TTSCountdown(num)
    for i= num, 1, -1 do
        if i == num then 
            NSAPI:TTS(i)
        else
            C_Timer.After(num-i, function() NSAPI:TTS(i) end)
        end
    end
end

local path = "Interface\\AddOns\\NorthernSkyRaidTools\\Media\\Sounds\\"
function NSAPI:TTS(sound, voice, overlap) -- NSAPI:TTS("Bait Frontal")
    if NSRT.Settings["TTS"] then
        local secret = issecretvalue(sound)
        local handle = (not secret) and select(2, PlaySoundFile(path..sound..".ogg", "Master"))          
        if handle then
            PlaySoundFile(path..sound..".ogg", "Master")
        else
            sound = tostring(sound)
            local num = voice or NSRT.Settings["TTSVoice"]
            C_VoiceChat.SpeakText(
                num,
                sound,
                C_TTSSettings and C_TTSSettings.GetSpeechRate() or 0,
                NSRT.Settings["TTSVolume"],
                overlap
            )
        end
    end    
end

function NSI:GetSubGroup(unit)
    for i=1, 40 do
        local name, _, subgroup = GetRaidRosterInfo(i)
        if name and UnitIsUnit(name, unit) then
            return subgroup
        end
    end
end

function NSI:SpecToName(specid)
    if specid == 1 then return "\124T" .. 135724 .. ":10:10:0:0:64:64:4:60:4:60\124t" .. " " .. "All Specs" end
    local _, specName, _, icon, _, classFile = GetSpecializationInfoByID(specid)
    if not specName then return "" end
    local color = GetClassColorObj(classFile)
    return "\124T" .. icon .. ":10:10:0:0:64:64:4:60:4:60\124t" .. " " .. color:WrapTextInColorCode(specName)
end

function NSI:Utf8Sub(str, startChar, endChar)
    if not str then return str end
    local startIndex, endIndex = 1, #str
    local currentIndex, currentChar = 1, 0

    while currentIndex <= #str do
        currentChar = currentChar + 1

        if currentChar == startChar then
            startIndex = currentIndex
        end
        if endChar and currentChar > endChar then
            endIndex = currentIndex - 1
            break
        end
        
        local c = string.byte(str, currentIndex)
        if c < 0x80 then
            currentIndex = currentIndex + 1
        elseif c < 0xE0 then
            currentIndex = currentIndex + 2
        elseif c < 0xF0 then
            currentIndex = currentIndex + 3
        else
            currentIndex = currentIndex + 4
        end
    end

    return string.sub(str, startIndex, endIndex)
end

function NSI:UnitAura(unit, spell) -- simplify aura checking for myself
    if self:Restricted() then return "" end
    if unit and UnitExists(unit) and spell then
        if type(spell) == "string" or not C_UnitAuras.GetUnitAuraBySpellID then
            local spelltable = C_Spell.GetSpellInfo(spell)
            return spelltable and C_UnitAuras.GetAuraDataBySpellName(unit, spelltable.name)
        elseif type(spell) == "number" then 
            return C_UnitAuras.GetUnitAuraBySpellID(unit, spell)
        else
            return false
        end
    end
end
NSI   = NSI   or {}
NSAPI = NSAPI or {}
NSI.Callbacks = NSI.Callbacks or LibStub("CallbackHandler-1.0"):New(NSI)

function NSI:FireCallback(event, ...)
    if NSRT.ReminderSettings.UseTimelineReminders then
        self.Callbacks:Fire(event, ...)
    else
        self.Callbacks:Fire(event, "", "") -- send empty strings if setting is disabled
    end
end

function NSAPI:RegisterCallback(event, callback, owner)
    return NSI:RegisterCallback(event, callback, owner)
end

function NSAPI:UnregisterCallback(event, callback, owner)
    return NSI:UnregisterCallback(event, callback, owner)
end

function NSAPI:UnregisterAllCallbacks(owner)
    return NSI:UnregisterAllCallbacks(owner)
end