-- Inputs:

--    image - Can either be a bare filename (with or without the File:/Image: prefix) or a fully formatted image link

--    page - page to display for multipage images (DjVu)

--    size - size to display the image

--    maxsize - maximum size for image

--    sizedefault - default size to display the image if size param is blank

--    alt - alt text for image

--    title - title text for image

--    border - set to yes if border

--    center - set to yes, if the image has to be centered

--    upright - upright image param

--    suppressplaceholder - if yes then checks to see if image is a placeholder and suppresses it

--    link - page to visit when clicking on image

--    class - HTML classes to add to the image

-- Outputs:

--    Formatted image.

-- More details available at the "Module:InfoboxImage/doc" page



local i = {};



local placeholder_image = {

    "Blue - Replace this image female.svg",

    "Blue - Replace this image male.svg",

    "Female no free image yet.png",

    "Flag of None (square).svg",

    "Flag of None.svg",

    "Flag of.svg",

    "Green - Replace this image female.svg",

    "Green - Replace this image male.svg",

    "Image is needed female.svg",

    "Image is needed male.svg",

    "Location map of None.svg",

    "Male no free image yet.png",

    "Missing flag.png",

    "No flag.svg",

    "No free portrait.svg",

    "No portrait (female).svg",

    "No portrait (male).svg",

    "Red - Replace this image female.svg",

    "Red - Replace this image male.svg",

    "Replace this image female (blue).svg",

    "Replace this image female.svg",

    "Replace this image male (blue).svg",

    "Replace this image male.svg",

    "Silver - Replace this image female.svg",

    "Silver - Replace this image male.svg",

    "Replace this image.svg",

	"Cricket no pic.png",

	"CarersLogo.gif",

	"Diagram Needed.svg",

	"Example.jpg",

	"Image placeholder.png",

	"No male portrait.svg",

	"Nocover-upload.png",

	"NoDVDcover copy.png",

	"Noribbon.svg",

	"No portrait-BFD-test.svg",

	"Placeholder barnstar ribbon.png",

	"Project Trains no image.png",

	"Image-request.png",

	"Sin bandera.svg",

	"Sin escudo.svg",

	"Replace this image - temple.png",

	"Replace this image butterfly.png",

	"Replace this image.svg",

	"Replace this image1.svg",

	"Resolution angle.png",

	"Image-No portrait-text-BFD-test.svg",

	"Insert image here.svg",

	"No image available.png",

	"NO IMAGE YET square.png",

	"NO IMAGE YET.png",

	"No Photo Available.svg",

	"No Screenshot.svg",

	"No-image-available.jpg",

	"Null.png",

	"PictureNeeded.gif",

	"Place holder.jpg",

	"Unbenannt.JPG",

	"UploadACopyrightFreeImage.svg",

	"UploadAnImage.gif",

	"UploadAnImage.svg",

	"UploadAnImageShort.svg",

	"CarersLogo.gif",

	"Diagram Needed.svg",

	"No male portrait.svg",

	"NoDVDcover copy.png",

	"Placeholder barnstar ribbon.png",

	"Project Trains no image.png",

	"Image-request.png",

	"Noimage.gif",

}



function i.IsPlaceholder(image)

    -- change underscores to spaces

    image = mw.ustring.gsub(image, "_", " ");

    assert(image ~= nil, 'mw.ustring.gsub(image, "_", " ") must not return nil')

    -- if image starts with [[ then remove that and anything after |

    if mw.ustring.sub(image,1,2) == "[[" then

        image = mw.ustring.sub(image,3);

        image = mw.ustring.gsub(image, "([^|]*)|.*", "%1");

        assert(image ~= nil, 'mw.ustring.gsub(image, "([^|]*)|.*", "%1") must not return nil')

    end

    -- Trim spaces

    image = mw.ustring.gsub(image, '^[ ]*(.-)[ ]*$', '%1');

    assert(image ~= nil, "mw.ustring.gsub(image, '^[ ]*(.-)[ ]*$', '%1') must not return nil")

    -- remove prefix if exists

    local allNames = mw.site.namespaces6].aliases

    allNames#allNames + 1 = mw.site.namespaces6].name

    allNames#allNames + 1 = mw.site.namespaces6].canonicalName

    for i, name in ipairs(allNames) do

        if mw.ustring.lower(mw.ustring.sub(image, 1, mw.ustring.len(name) + 1)) == mw.ustring.lower(name .. ":") then

            image = mw.ustring.sub(image, mw.ustring.len(name) + 2);

            break

        end

    end

    -- Trim spaces

    image = mw.ustring.gsub(image, '^[ ]*(.-)[ ]*$', '%1');

    -- capitalise first letter

    image = mw.ustring.upper(mw.ustring.sub(image,1,1)) .. mw.ustring.sub(image,2);



    for i,j in pairs(placeholder_image) do

        if image == j then

            return true

        end

    end

    return false

end



function i.InfoboxImage(frame)

    local image = frame.args"image"];

    

    if image == "" or image == nil then

        return "";

    end

    if image == " " then

        return image;

    end

    if frame.args"suppressplaceholder" ~= "no" then

        if i.IsPlaceholder(image) == true then

            return "";

        end

    end



    if mw.ustring.lower(mw.ustring.sub(image,1,5)) == "http:" then

        return "";

    end

    if mw.ustring.lower(mw.ustring.sub(image,1,6)) == "[http:" then

        return "";

    end

    if mw.ustring.lower(mw.ustring.sub(image,1,7)) == "[[http:" then

        return "";

    end

    if mw.ustring.lower(mw.ustring.sub(image,1,6)) == "https:" then

        return "";

    end

    if mw.ustring.lower(mw.ustring.sub(image,1,7)) == "[https:" then

        return "";

    end

    if mw.ustring.lower(mw.ustring.sub(image,1,8)) == "[[https:" then

        return "";

    end



    if mw.ustring.sub(image,1,2) == "[[" then

        -- search for thumbnail images and add to tracking cat if found

        local cat = "";

        if mw.title.getCurrentTitle().namespace == 0 and (mw.ustring.find(image, "|%s*thumb%s*[|%]]") or mw.ustring.find(image, "|%s*thumbnail%s*[|%]]")) then

            cat = "[[Category:Pages using infoboxes with thumbnail images]]";

        end

        return image .. cat;

    elseif mw.ustring.sub(image,1,2) == "{{" and mw.ustring.sub(image,1,3) ~= "{{{" then

        return image;

    elseif mw.ustring.sub(image,1,1) == "<" then

        return image;

    elseif mw.ustring.sub(image,1,8) == mw.ustring.char(127).."'\"`UNIQ" then

        -- Found strip marker at begining, so pass don't process at all

        return image;

    else

        local result = "";

        local page = frame.args"page"];

        local size = frame.args"size"];

        local maxsize = frame.args"maxsize"];

        local sizedefault = frame.args"sizedefault"];

        local alt = frame.args"alt"];

        local link = frame.args"link"];

        local title = frame.args"title"];

        local border = frame.args"border"];

        local upright = frame.args"upright" or "";

        local thumbtime = frame.args"thumbtime" or "";

        local center = frame.args"center"];

        local class = frame.args"class"];

        

        -- remove prefix if exists

        local allNames = mw.site.namespaces6].aliases

        allNames#allNames + 1 = mw.site.namespaces6].name

        allNames#allNames + 1 = mw.site.namespaces6].canonicalName

        for i, name in ipairs(allNames) do

            if mw.ustring.lower(mw.ustring.sub(image, 1, mw.ustring.len(name) + 1)) == mw.ustring.lower(name .. ":") then

                image = mw.ustring.sub(image, mw.ustring.len(name) + 2);

                break

            end

        end

        

        if maxsize ~= "" and maxsize ~= nil then

            -- if no sizedefault then set to maxsize

            if sizedefault == "" or sizedefault == nil then

                sizedefault = maxsize

            end

            -- check to see if size bigger than maxsize

            if size ~= "" and size ~= nil then

                local sizenumber = tonumber(mw.ustring.match(size,"%d*")) or 0;

                local maxsizenumber = tonumber(mw.ustring.match(maxsize,"%d*")) or 0;

                if sizenumber>maxsizenumber and maxsizenumber>0 then

                    size = maxsize;

                end

            end

        end

        -- add px to size if just a number

        if (tonumber(size) or 0) > 0 then

            size = size .. "px";

        end

        -- add px to sizedefault if just a number

        if (tonumber(sizedefault) or 0) > 0 then

            sizedefault = sizedefault .. "px";

        end

        

        result = "[[File:" .. image;

        if page ~= "" and page ~= nil then

            result = result .. "|page=" .. page;

        end

        if size ~= "" and size ~= nil then

            result = result .. "|" .. size;

        elseif sizedefault ~= "" and sizedefault ~= nil then

            result = result .. "|" .. sizedefault;

        else

            result = result .. "|frameless";

        end

        if center == "yes" then

            result = result .. "|center"

        end

        if alt ~= "" and alt ~= nil then

            result = result .. "|alt=" .. alt;

        end

        if link ~= "" and link ~= nil then

            result = result .. "|link=" .. link;

        end

        if border == "yes" then

            result = result .. "|border";

        end

        if upright == "yes" then

            result = result .. "|upright";

        elseif upright ~= "" then

            result = result .. "|upright=" .. upright;

        end

        if thumbtime ~= "" then

            result = result .. "|thumbtime=" .. thumbtime;

        end

        if class ~= nil and class ~= "" then

            result = result .. "|class=" .. class;

        end

        -- if alt value is a keyword then do not use as a description

        if alt == "thumbnail" or alt == "thumb" or alt == "frameless" or alt == "left" or alt == "center" or alt == "right" or alt == "upright" or alt == "border" or mw.ustring.match(alt or "", '^[0-9]*px$', 1) ~= nil then

            alt = nil;

        end

        if title ~= "" and title ~= nil then

            -- does title param contain any templatestyles? If yes then set to blank.

            if mw.ustring.match(frame:preprocess(title), 'UNIQ%-%-templatestyles', 1) ~= nil then

                title = nil;

            end

        end

        if title ~= "" and title ~= nil then

            result = result .. "|" .. title;

        end

        result = result .. "]]";

        

        return result;

    end

end



return i;