-- luacheck: globals tonumber tostring select

WoWPro.MarkupTags = {}

local function RegisterMarkup(tag, func)
    WoWPro.MarkupTags[tag] = func
end

function WoWPro.ExpandAbility(ability,want_icon, want_text)
    if not _G.C_PetJournal then
        WoWPro:print("Markup [ability=] not usable in Classic")
        return nil
    end
    local name, icon = _G.C_PetJournal.GetPetAbilityInfo(tonumber(ability))
    local expanded = ""
    if name then
        if want_icon then
            expanded = expanded .. "|T" .. icon .. ":0::0:0|t"
        end
        if want_text then
            expanded = expanded .. " " .. name
        end
    else
        WoWPro:print("Invalid Markup ability=%s", tostring(ability))
        return nil
    end
    return expanded
end
RegisterMarkup("ability", WoWPro.ExpandAbility)

local InvalidCount = {}
function WoWPro.ExpandItem(item, want_icon, want_text)
    local name, link, _, _, _, _, _, _, _, texture = WoWPro.C_Item_GetItemInfo(tonumber(item))
    local expanded = ""
    if name then
        if want_icon then
            expanded = expanded .. "|T" .. texture .. ":0::0:0|t"
        end
        if want_text then
            expanded = expanded .. " " .. link
        end
    else
        InvalidCount[tonumber(item)] = InvalidCount[tonumber(item)] or 0
        InvalidCount[tonumber(item)] = InvalidCount[tonumber(item)] + 1
        if InvalidCount[tonumber(item)] > 2 then
           WoWPro:print("Invalid Markup item=%s", tostring(item))
        end
        return nil
    end
    return expanded
end
RegisterMarkup("item", WoWPro.ExpandItem)

function WoWPro.ExpandAch(ach, want_icon, want_text)
    local id, name, _, _, _, _, _, _, _, icon = _G.GetAchievementInfo(ach)
    local expanded = ""
    if id then
        if want_icon then
            expanded = expanded .. "|T" .. icon .. ":0::0:0|t"
        end
        if want_text then
            expanded = expanded .. " " .. name
        end
    else
        WoWPro:print("Invalid Markup ach=%s", tostring(ach))
        return nil
    end
    return expanded
end
RegisterMarkup("ach", WoWPro.ExpandAch)

function WoWPro.ExpandSpell(spell, want_icon, want_text)

    local spellInfo = WoWPro.C_Spell_GetSpellInfo(tonumber(spell))
    local name = spellInfo.name
    local texture = spellInfo.iconID
    local link  =  WoWPro.C_Spell_GetSpellLink(tonumber(spell))
    local expanded = ""
    if name then
        if want_icon then
            expanded = expanded .. "|T" .. texture .. ":0::0:0|t"
        end
        if want_text then
            expanded = expanded .. " " .. link
        end
    else
        WoWPro:print("Invalid Markup spell=%s", tostring(spell))
        return nil
    end
    return expanded
end
RegisterMarkup("spell", WoWPro.ExpandSpell)

function WoWPro.ExpandMoney(money,want_icon, want_text)
    local expanded = WoWPro.C_CurrencyInfo_GetCoinTextureString(tonumber(money)*100*100)
    return expanded
end
RegisterMarkup("money", WoWPro.ExpandMoney)


-- [color=FF0000]Red[/color]
function WoWPro.ExpandColor(color,want_icon, want_text)
    return "|c" .. "FF" .. color
end
RegisterMarkup("color", WoWPro.ExpandColor)

function WoWPro.ExpandEndColor(color,want_icon, want_text)
    return "|r"
end
RegisterMarkup("/color", WoWPro.ExpandEndColor)

function WoWPro.ExpandMarkup(text)
    -- We support three kinds of markup tags:
    -- [tag=%d;{text|icon|itext|}] or [tag=%d] with a default of itext
    -- [money=%f]  for displaying Gold
    -- [/color] for closing context
    if WoWPro.Recorder then
        return text
    end
    local want_icon, want_text
    -- WoWPro:dbp("ExpandMarkup starting on %s",text:gsub("|", "¦"))

    local tag_start, tag, tag_text, tag_id, tag_qual, tag_end
    -- First test for any tag-like thing [.*]
    tag_start, tag, tag_end = text:match("()(%[[^]]+%])()")
    if tag_start then
        -- OK, we have a possible tag.  Classify
        -- Is it like [/color] ?
        tag_text = tag:match("^%[(/[%a]+)%]$")
        if not tag_text then
            -- Lets try no qualifier
            -- WoWPro:dbp("ExpandMarkup Failed [/color]")
            -- [fizzel=123AZ/XXX and Y]
            tag_text, tag_id = tag:match("^%[([%a]+)=([%d%a/: -]+)%]$")
            if not tag_text then
                -- WoWPro:dbp("ExpandMarkup Failed [foo=123/XXX-and-Y]")
                -- [money=123.45]
                tag_text, tag_id = tag:match("^%[(money)=([%d.]+)%]$")
                if not tag_text then
                    -- WoWPro:dbp("ExpandMarkup Failed [money=1.2]")
                    -- [spell=123/foooBar;icon]
                    tag_text, tag_id, tag_qual = tag:match("^%[([%a]+)=([%d%a/: -]+);([icontex]+)%]$")
                    if not tag_text then
                        -- WoWPro:print("ExpandMarkup failed on %s",text:gsub("|", "¦"))
                        return text
                    end
                end
            end
        end
    else
        -- No tag, exit
        return text
    end
    tag_id = tag_id or ""
    tag_text = tag_text:lower()
    tag_qual = (tag_qual and tag_qual:lower()) or "itext"
    -- WoWPro:dbp("ExpandMarkup  text=%s, qual=%s, id=%s", tag_text, tag_qual, tag_id)
    -- could have comment text after /
    tag_id = select(1, ("/"):split(tag_id))
    if tag_qual == "itext" then
        want_icon = true
        want_text = true
    elseif tag_qual == "icon" then
        want_icon = true
        want_text = false
    elseif tag_qual == "text" then
        want_icon = false
        want_text = true
    else
        want_icon = true
        want_text = true
    end

    if not WoWPro.MarkupTags[tag_text] then
        WoWPro:Error("Encounted bad markup in text: %s",text)
        return text
    end
    local pre = text:sub(1, tag_start - 1)
    local post =  text:sub(tag_end, -1)
    local expand = WoWPro.MarkupTags[tag_text](tag_id, want_icon, want_text)
    if not expand then
        -- If we were unable to expand, punt!
        expand = text:sub(tag_start, tag_end)
    end
    -- WoWPro:dbp("ExpandMarkup [%s=%s;%s] => %s",tag_text, tostring(tag_id), tag_qual, expand:gsub("|", "¦"))
    text = pre..expand..WoWPro.ExpandMarkup(post)
    return text
end

function WoWPro.TestMarkup()
    _G.DEFAULT_CHAT_FRAME:AddMessage(WoWPro.ExpandMarkup("[spell=1459/Arcane Intellect]"))
    _G.DEFAULT_CHAT_FRAME:AddMessage(WoWPro.ExpandMarkup("[item=137642/mark-of-honor]"))
    _G.DEFAULT_CHAT_FRAME:AddMessage(WoWPro.ExpandMarkup("[money=12.34]"))
    _G.DEFAULT_CHAT_FRAME:AddMessage(WoWPro.ExpandMarkup("[ability=593/surge-of-power]"))
    _G.DEFAULT_CHAT_FRAME:AddMessage(WoWPro.ExpandMarkup("[color=112233]Oh Yeah![/color]"))
    _G.DEFAULT_CHAT_FRAME:AddMessage(WoWPro.ExpandMarkup("[color=ff8000]Elite: [/color]Destroy the Altered Sentinel.\n[color=FF0000]NOTE: [/color]Despite being yellow, it will attack you as soon as you step within the colored area.\nXXX"))
end
