-- Freewood-OctoWoW-Core: Reiter "Kanaele" (Chat-Kanaele und ihre Mitglieder). UNGEPRUEFT im Spiel.
-- Links die Kanaele, rechts die Mitglieder des gewaehlten Kanals oder die Suchtreffer ueber alle Kanaele.

local ADDON, FW = ...

local UI = FW.UI
local Ch = FW.Channels

local ROW = 20
local MAX_ROWS = 300

local function MakeRows(holder)
    local rows = {}
    function rows.Get(i)
        local r = rows[i]
        if not r then
            r = CreateFrame("Button", nil, holder.child)
            r:SetHeight(ROW)
            r:SetPoint("TOPLEFT", holder.child, "TOPLEFT", 0, -(i - 1) * ROW)
            r:SetPoint("TOPRIGHT", holder.child, "TOPRIGHT", 0, -(i - 1) * ROW)
            r.sel = r:CreateTexture(nil, "BACKGROUND")
            r.sel:SetAllPoints()
            r.sel:SetColorTexture(UI.Color("bronze", 0.35))
            r.sel:Hide()
            r.hl = r:CreateTexture(nil, "HIGHLIGHT")
            r.hl:SetAllPoints()
            r.hl:SetColorTexture(UI.Color("gold", 0.15))
            r.text = UI.CreateLabel(r, "", { size = 12, justify = "LEFT" })
            r.text:SetPoint("LEFT", r, "LEFT", 6, 0)
            r.text:SetPoint("RIGHT", r, "RIGHT", -4, 0)
            rows[i] = r
        end
        return r
    end
    function rows.HideFrom(i)
        local k = i
        while rows[k] do rows[k]:Hide(); k = k + 1 end
    end
    return rows
end

local function BuildChannels(content)
    local L = FW.L
    local f = CreateFrame("Frame", nil, content)
    f:SetAllPoints(content)

    local selNum, selPlayer, seenVersion = nil, nil, -1
    local search = ""
    local lastAuto = 0

    -- links: Kanalliste
    local title = UI.CreateLabel(f, L.TAB_CHANNELS, { font = "heading", size = 15, color = "gold" })
    title:SetPoint("TOPLEFT", f, "TOPLEFT", 0, 0)
    local refresh = UI.CreateButton(f, L.CHAN_REFRESH, 110, 24, function()
        Ch.RefreshAll()
    end)
    refresh:SetPoint("TOPLEFT", f, "TOPLEFT", 100, 2)
    local left = UI.CreateScrollFrame(f)
    left:SetPoint("TOPLEFT", f, "TOPLEFT", 0, -34)
    left:SetPoint("BOTTOMLEFT", f, "BOTTOMLEFT", 0, 0)
    left:SetWidth(220)
    local lrows = MakeRows(left)

    -- rechts: Suche, Status, Mitglieder, Aktionsleiste
    local box = UI.CreatePanel(f, "bgDeep", "bronze")
    box:SetHeight(26)
    box:SetPoint("TOPLEFT", f, "TOPLEFT", 236, -2)
    box:SetPoint("TOPRIGHT", f, "TOPRIGHT", 0, -2)
    local edit = CreateFrame("EditBox", nil, box)
    edit:SetAutoFocus(false)
    edit:SetPoint("TOPLEFT", box, "TOPLEFT", 8, -2)
    edit:SetPoint("BOTTOMRIGHT", box, "BOTTOMRIGHT", -8, 2)
    edit:SetMaxLetters(40)
    if not edit:SetFont(UI.GetFontPath("body"), 12, "") then
        edit:SetFont("Fonts\\FRIZQT__.TTF", 12, "")
    end
    edit:SetTextColor(UI.Color("text"))
    edit:SetScript("OnEscapePressed", function(self) self:ClearFocus() end)
    local hint = UI.CreateLabel(box, L.CHAN_SEARCH, { size = 12, color = "textDim" })
    hint:SetPoint("LEFT", box, "LEFT", 10, 0)

    local status = UI.CreateLabel(f, "", { size = 11, color = "textDim", justify = "LEFT" })
    status:SetPoint("TOPLEFT", f, "TOPLEFT", 236, -34)
    status:SetPoint("TOPRIGHT", f, "TOPRIGHT", 0, -34)

    local right = UI.CreateScrollFrame(f)
    right:SetPoint("TOPLEFT", f, "TOPLEFT", 236, -54)
    right:SetPoint("BOTTOMRIGHT", f, "BOTTOMRIGHT", 0, 36)
    local rrows = MakeRows(right)

    local selLabel = UI.CreateLabel(f, L.CHAN_SELECT, { size = 12, color = "textDim", justify = "LEFT" })
    selLabel:SetPoint("BOTTOMLEFT", f, "BOTTOMLEFT", 236, 10)
    selLabel:SetWidth(200)
    local function Act(fn)
        return function() if selPlayer then fn(selPlayer) end end
    end
    local bW = UI.CreateButton(f, L.CHAN_WHISPER, 90, 24, Act(Ch.Whisper))
    local bI = UI.CreateButton(f, L.CHAN_INVITE, 90, 24, Act(Ch.Invite))
    local bG = UI.CreateButton(f, L.CHAN_IGNORE, 90, 24, Act(Ch.Ignore))
    bG:SetPoint("BOTTOMRIGHT", f, "BOTTOMRIGHT", 0, 4)
    bI:SetPoint("RIGHT", bG, "LEFT", -6, 0)
    bW:SetPoint("RIGHT", bI, "LEFT", -6, 0)

    local function Redraw()
        seenVersion = Ch.version
        -- Kanalliste
        local n = table.getn(Ch.list)
        local k = 1
        while k <= n do
            local e = Ch.list[k]
            local r = lrows.Get(k)
            local num = e.num
            r.text:SetText(e.num .. ". " .. e.name .. "  |cff8c8a84(" .. (e.stamp and e.count or "?") .. ")|r")
            if num == selNum then r.sel:Show() else r.sel:Hide() end
            r:SetScript("OnClick", function()
                selNum = num
                selPlayer = nil
                Redraw()
            end)
            r:Show()
            k = k + 1
        end
        lrows.HideFrom(n + 1)
        left:SetContentHeight(math.max(1, n * ROW))

        -- rechts
        local items = {}   -- { name=, extra= }
        if search ~= "" then
            local hits = Ch.Find(search, MAX_ROWS)
            local h = 1
            while h <= table.getn(hits) do
                items[h] = { name = hits[h].name, extra = table.concat(hits[h].chans, ", ") }
                h = h + 1
            end
            if table.getn(items) == 0 then
                status:SetText(L.CHAN_NO_HITS)
            elseif Ch.moreFound then
                status:SetText(L.CHAN_MORE)
            else
                status:SetText("")
            end
            Ch.moreFound = nil
        else
            local e = selNum and Ch.byNum[selNum]
            if n == 0 then
                status:SetText(L.CHAN_NONE)
            elseif not e then
                status:SetText(L.CHAN_SELECT)
            else
                local txt = e.num .. ". " .. e.name
                if e.stamp then
                    txt = txt .. " - " .. string.format(L.CHAN_MEMBERS, tostring(e.count))
                else
                    txt = txt .. " - " .. L.CHAN_NOT_QUERIED
                end
                if string.find(e.name, "^Freewood") then txt = txt .. " (" .. L.CHAN_HIDDEN .. ")" end
                local pend = Ch.Pending()
                if pend > 0 then txt = txt .. " - " .. string.format(L.CHAN_PENDING, tostring(pend)) end
                status:SetText(txt)
                local m = 1
                while m <= table.getn(e.members) and m <= MAX_ROWS do
                    items[m] = { name = e.members[m] }
                    m = m + 1
                end
            end
        end
        local cnt = table.getn(items)
        local i = 1
        while i <= cnt do
            local it = items[i]
            local r = rrows.Get(i)
            local nm = it.name
            if it.extra then
                r.text:SetText(nm .. "  |cff8c8a84" .. it.extra .. "|r")
            else
                r.text:SetText(nm)
            end
            if nm == selPlayer then r.sel:Show() else r.sel:Hide() end
            r:SetScript("OnClick", function()
                selPlayer = nm
                selLabel:SetText(nm)
                Redraw()
            end)
            r:Show()
            i = i + 1
        end
        rrows.HideFrom(cnt + 1)
        right:SetContentHeight(math.max(1, cnt * ROW))
    end

    edit:SetScript("OnTextChanged", function(self)
        search = self:GetText() or ""
        if search == "" then hint:Show() else hint:Hide() end
        right:ScrollToTop()
        Redraw()
    end)

    f.Refresh = function()
        if Ch.dirty or table.getn(Ch.list) == 0 then
            Ch.dirty = nil
            Ch.RefreshAll()
        else
            Ch.Rescan()
        end
        if not selNum and Ch.list[1] then selNum = Ch.list[1].num end
        Redraw()
    end

    -- Aenderungen der Datenschicht nachziehen (hoechstens 2x pro Sekunde)
    local acc = 0
    f:SetScript("OnUpdate", function(_, el)
        acc = acc + (el or arg1 or 0)
        if acc < 0.5 then return end
        acc = 0
        if f:IsShown() and seenVersion ~= Ch.version then Redraw() end
    end)

    return f
end

UI:RegisterTab("channels", {
    label = function() return FW.L.TAB_CHANNELS end,
    order = 115,
    build = BuildChannels,
    onShow = function(f) f.Refresh() end,
})