Documentation for this module may be created at Module:BCIChapters/doc

local p = {}

local special_cases = {
    ["Augustus, You Jerk 2"] = { seq = 24, title = "Augustus, You Jerk #2" }
}

function p.urlDecode(str)
    str = string.gsub(str, '%%(%x%x)', function(x) return string.char(tonumber(x, 16)) end)
    return str
end

function p.normalizeApostrophes(str)
    str = string.gsub(str, "’", "'")
    str = string.gsub(str, "'", "'")
    str = string.gsub(str, "%%27", "'")
    return str
end

function p.getChaptersList()
    local listPage = mw.title.new('Template:BCIChapterList')
    if not listPage then
        return {}
    end

    local content = listPage:getContent()
    if not content then
        return {}
    end

    -- Normalize apostrophes in content
    content = p.normalizeApostrophes(content)

    local chapters = {}
    for seq, title, date, pagecount in string.gmatch(content, "{{BCIChapter|seq=(%d+)|title=([^|]+)|date=([^|]+)|pagecount=(%d+)}}") do
        table.insert(chapters, {seq = tonumber(seq), title = title, date = date, pagecount = tonumber(pagecount)})
    end

    return chapters
end

function p.getChapterDetails(chapterTitle, detail)
    local chapters = p.getChaptersList()
    local decodedTitle = p.urlDecode(chapterTitle)
    local normalizedTitle = p.normalizeApostrophes(decodedTitle)
    for _, chapter in ipairs(chapters) do
        if chapter.title == normalizedTitle then
            return chapter[detail]
        end
    end
    return nil
end

function p.getChapterDetailsBySeq(seq, detail)
    local chapters = p.getChaptersList()
    for _, chapter in ipairs(chapters) do
        if chapter.seq == tonumber(seq) then
            return chapter[detail]
        end
    end
    return nil
end

function p.getNextChapter(chapterTitle)
    local chapters = p.getChaptersList()
    local decodedTitle = p.urlDecode(chapterTitle)
    local normalizedTitle = p.normalizeApostrophes(decodedTitle)
    for i, chapter in ipairs(chapters) do
        if chapter.title == normalizedTitle and i < #chapters then
            return chapters[i + 1].title
        end
    end
    return nil
end

function p.getPreviousChapter(chapterTitle)
    local chapters = p.getChaptersList()
    local decodedTitle = p.urlDecode(chapterTitle)
    local normalizedTitle = p.normalizeApostrophes(decodedTitle)
    for i, chapter in ipairs(chapters) do
        if chapter.title == normalizedTitle and i > 1 then
            return chapters[i - 1].title
        end
    end
    return nil
end

function p.formatDate(date)
    local year, month, day = string.match(date, "(%d+)%-(%d+)%-(%d+)")
    if year and month and day then
        return string.format("{{Start date|%s|%s|%s}}", year, month, day)
    else
        return date
    end
end

function p.infoboxBCIChapter(frame)
    local chapterTitle = frame.args.chapter_title or mw.title.getCurrentTitle().text
    local seq = frame.args.seq
    local chapterData

    if special_cases[chapterTitle] then
        seq = special_cases[chapterTitle].seq
        chapterTitle = special_cases[chapterTitle].title
    end

    if seq then
        seq = tonumber(seq)  -- Ensure seq is treated as a number
        chapterData = {
            title = p.getChapterDetailsBySeq(seq, "title"),
            date = p.getChapterDetailsBySeq(seq, "date"),
            pagecount = p.getChapterDetailsBySeq(seq, "pagecount"),
            next_chapter = p.getChapterDetailsBySeq(seq + 1, "title"),
            prev_chapter = p.getChapterDetailsBySeq(seq - 1, "title")
        }
    else
        chapterData = {
            title = chapterTitle,
            date = p.getChapterDetails(chapterTitle, "date"),
            pagecount = p.getChapterDetails(chapterTitle, "pagecount"),
            next_chapter = p.getNextChapter(chapterTitle),
            prev_chapter = p.getPreviousChapter(chapterTitle)
        }
    end

    local image = frame.args.image
    local caption = frame.args.caption
    local major_characters = frame.args.major_characters
    local minor_characters = frame.args.minor_characters
    local locations = frame.args.locations

    caption = caption and caption ~= "" and caption or nil

    local infobox = mw.html.create('table')
    infobox:addClass('infobox')

    -- Add title as heading
    infobox:tag('tr')
        :tag('th')
            :attr('colspan', '2')
            :css('text-align', 'center')
            :css('font-size', '125%')
            :css('padding', '5px')
            :wikitext(chapterTitle)
            :done()
        :done()

    -- Optionally add image with standard size
    if image and image ~= "" then
        infobox:tag('tr')
            :tag('td')
                :attr('colspan', '2')
                :css('text-align', 'center')
                :wikitext('[[File:' .. image .. '|250px]]')
                :done()
            :done()

        -- Add caption below image if provided
        if caption then
            infobox:tag('tr')
                :tag('td')
                    :attr('colspan', '2')
                    :css('text-align', 'center')
                    :css('font-size', '90%')
                    :css('padding', '5px')
                    :wikitext(caption)
                    :done()
                :done()
        end
    end

    infobox:tag('tr')
        :tag('th'):wikitext('Published'):done()
        :tag('td'):wikitext(p.formatDate(chapterData.date or "N/A")):done()
        :done()

    infobox:tag('tr')
        :tag('th'):wikitext('Page count'):done()
        :tag('td'):wikitext(chapterData.pagecount or "N/A"):done()
        :done()

    -- Add additional manual entry parameters
    if major_characters and major_characters ~= "" then
        infobox:tag('tr')
            :tag('th'):wikitext('Major characters'):done()
            :tag('td'):wikitext(major_characters):done()
            :done()
    end

    if minor_characters and minor_characters ~= "" then
        infobox:tag('tr')
            :tag('th'):wikitext('Minor characters'):done()
            :tag('td'):wikitext(minor_characters):done()
            :done()
    end

    if locations and locations ~= "" then
        infobox:tag('tr')
            :tag('th'):wikitext('Locations'):done()
            :tag('td'):wikitext(locations):done()
            :done()
    end

    -- Add chapter navigation heading
    infobox:tag('tr')
        :tag('th')
            :attr('colspan', '2')
            :css('text-align', 'center')
            :css('font-size', '110%')
            :css('padding', '5px')
            :css('background-color', '#f0f0f0')
            :wikitext('Chapter navigation')
            :done()
        :done()

    -- Add chapter navigation links in separate columns
    local nav_row = infobox:tag('tr')
    nav_row:tag('td')
        :css('text-align', 'left')
        :wikitext(chapterData.prev_chapter ~= "N/A" and string.format("[[%s:%s|← %s]]", mw.title.getCurrentTitle().nsText, chapterData.prev_chapter, chapterData.prev_chapter) or "← Previous")
        :done()
    nav_row:tag('td')
        :css('text-align', 'right')
        :wikitext(chapterData.next_chapter ~= "N/A" and string.format("[[%s:%s|%s →]]", mw.title.getCurrentTitle().nsText, chapterData.next_chapter, chapterData.next_chapter) or "Next →")
        :done()
    nav_row:done()

    -- Add link to read chapter in BCI Members' Library
    infobox:tag('tr')
        :tag('td')
            :attr('colspan', '2')
            :css('text-align', 'center')
            :wikitext("[https://bittersweetcandybowl.com/members/ Read in the BCI Members' Library]")
            :done()
        :done()

    -- Return the complete wikitext
    return frame:preprocess(tostring(infobox))
end

return p