-- This module is a replacement for the RfX report bot.

local rfx = require( 'Module:Rfx' )
local colours = mw.loadData( 'Module:RFX report/colour' )

local p = {}

local function getTableLength(tbl)
	local length = 0
	for _ in pairs(tbl) do
		length = length + 1
	end
	return length
end

local function getRfxes()
    -- Get the title object for [[Wikipedia:Requests for adminship]].
    local noError, rfa = pcall( mw.title.new, 'Wikipedia:Requests for adminship' )
    if not noError or ( noError and not rfa ) then
        return nil
    end
    local rfaText = rfa:getContent()
    if not rfaText then
        return nil
    end
    
    -- Return a table with a list of pages transcluded from
    -- [[Wikipedia:Requests for adminship]], minus the exceptions
    -- which are always transcluded there.
    local t = {}
    local exceptions = { 'Front matter', 'Header', 'bureaucratship' }
    for rfxPage, rfxSubpage in mw.ustring.gmatch( rfaText, '{{[ _]*([wW]ikipedia:[rR]equests for %w+/([^{}]-))[ _]*}}' ) do
        local isException = false
        for _, v in ipairs( exceptions ) do
            if rfxSubpage == v then
                isException = true
            end
        end
        if not isException then
            table.insert( t, rfxPage )
        end
    end
    return t
end

local function makeRow( rfxObject )
    if not ( type( rfxObject ) == 'table' and rfxObject.getTitleObject and rfxObject.getSupportUsers ) then
        return nil
    end
    local status = rfxObject:getStatus()
    local page = rfxObject:getTitleObject().prefixedText
    local user = rfxObject.user or rfxObject:getTitleObject().subpageText
    local supports = rfxObject.supports
    local opposes = rfxObject.opposes
    local neutrals = rfxObject.neutrals
    local percent = rfxObject.percent
    local colour
    if percent then
        colour = colours[ rfxObject.type ][ percent ]
    end
    colour = colour or ''

    local percentStr = mw.ustring.format( '%d', percent )
    if percent == 0 and supports == 0 and opposes == 0 and neutrals == 0 then
        percentStr = 'N/A'
    elseif percent == 100 and opposes ~= 0 then
    	percentStr = '>99'
    end

    local votes
    if supports and opposes and neutrals and percent then
        votes = mw.ustring.format( [==[
        
| class="rfx-report-number" | [[%s#Support|%d]]
| class="rfx-report-number" | [[%s#Oppose|%d]]
| class="rfx-report-number" | [[%s#Neutral|%d]]
| class="rfx-report-number rfx-report-percent" style="background: #%s; color: #202122" | %s]==],
            page, supports,
            page, opposes,
            page, neutrals,
            colour, percentStr
        )
    else
        votes = '\n| colspan="4" class="rfx-report-error" | Error parsing votes'
    end
    if status then
        status = mw.language.getContentLanguage():ucfirst( status )
        if status == 'Pending closure' then
            status = 'Pending closure...'
        end
        status = '\n|' .. status
    else
        status = '\n| class="rfx-report-error" | Error getting status'
    end 
    local endTime = rfxObject.endTime
    local secondsLeft = rfxObject:getSecondsLeft()
    local timeLeft = rfxObject:getTimeLeft()
    local time
    if endTime and timeLeft then
        time = mw.ustring.format( '\n| %s\n| %s', endTime, timeLeft )
    else
        time = '\n| colspan="2" class="rfx-report-error" | Error parsing end time'
    end
    local dupes = rfxObject:dupesExist()
    if dupes then
        dupes = '<span class="rfx-report-dupes-yes">yes</span>'
    elseif dupes == false then
        dupes = 'no'
    else
        dupes = '--'
    end
    local report = rfxObject:getReport()
    if report then
        report = mw.ustring.format( '\n| [%s report]', tostring( report ) )
    else
        report = '\n| class="rfx-report-error" | Report not found'
    end
    local pending_class = ''
    if status == 'pending closure' then
        pending_class = 'class="rfx-report-pending"'
    end
    return mw.ustring.format(
        '\n|-%s\n| [[%s|%s]]%s%s%s\n| class="rfx-report-dupes" | %s%s',
        pending_class, page, user, votes, status, time, dupes, report
    )
end

local function makeHeading( rfxType )
	local frame = mw.getCurrentFrame()
    local rfxCaps
    if rfxType == 'rfa' then
        rfxCaps = 'RfA'
    elseif rfxType == 'rfb' then
        rfxCaps = 'RfB'
    else
        return nil
    end
    return mw.ustring.format(
        '\n|-\n! scope="col" | %s candidate !! scope="col" | <abbr title="Support">S</abbr> !! scope="col" | <abbr title="Oppose">O</abbr> !! scope="col" | <abbr title="Neutral">N</abbr> !! scope="col" | <abbr title="Support percentage (%%)">S %%</abbr> !! scope="col" | Status !! scope="col" | Ending (UTC) !! scope="col" | Time left !! scope="col" | <abbr title="Has duplicate votes?">Dups?</abbr> !! scope="col" | Report',
        rfxCaps
    )
end

local function getRfasRfbsSeparate()
	local rfxes = getRfxes()
    if not rfxes then
        return nil
    end
    -- Get RfX objects and separate RfAs and RfBs.
    local rfas = {}
    local rfbs = {}
    for i, rfxPage in ipairs( rfxes ) do
        local rfxObject = rfx.new( rfxPage )
        if rfxObject then
            if rfxObject.type == 'rfa' then
                table.insert( rfas, rfxObject )
            elseif rfxObject.type == 'rfb' then
                table.insert( rfbs, rfxObject )
            end
        end
    end
    
    return rfas, rfbs
end

local function makeReportRows()
	local rfas, rfbs = getRfasRfbsSeparate()

    local ret = {}
    if #rfas > 0 then
        table.insert( ret, makeHeading( 'rfa' ) )
        for i, rfaObject in ipairs( rfas ) do
            table.insert( ret, makeRow( rfaObject ) )
        end
    end
    if #rfbs > 0 then
        table.insert( ret, makeHeading( 'rfb' ) )
        for i, rfbObject in ipairs( rfbs ) do
            table.insert( ret, makeRow( rfbObject ) )
        end
    end
    return table.concat( ret )
end

local function makeReport( args )
    local purgeLink = mw.title.getCurrentTitle():fullUrl( 'action=purge' )
    local header = mw.ustring.format(
        '\n|+ Requests for [[Wikipedia:Requests for adminship|adminship]] and [[Wikipedia:Requests for bureaucratship|bureaucratship]] <span class="rfx-report-purge plainlinks">[%s update]</span>',
        purgeLink
    )
    local rows = makeReportRows() or ''
    if rows == '' then
        rows = '\n|-\n| colspan="10" | No current discussions. <span class="rfx-report-recent">[[WP:Requests for adminship by year|Recent RfAs]], recent RfBs: ([[Wikipedia:Successful bureaucratship candidacies|successful]], [[Wikipedia:Unsuccessful bureaucratship candidacies|unsuccessful]])</span>'
    end
    
    local float = args.float or args.align
    if not float or mw.text.trim(float) == '' then
    	float = nil
    end
    local clear = args.clear
    if not clear or mw.text.trim(clear) == '' then
    	clear = nil
    end
    
    local style = ''
    if float or clear then
    	style = string.format(
    		'style="%s%s"',
    		clear and ('clear: ' .. clear .. ';') or '',
    		float and ('float: ' .. float .. ';') or ''
    	)
    end

    return mw.getCurrentFrame():extensionTag{
		name = 'templatestyles', args = { src = 'Module:RFX report/styles.css' }
	} .. mw.ustring.format(
    	'\n{| class="wikitable rfx-report" %s%s%s\n|-\n|}',
    	style,
    	header,
    	rows
    )
end

function p.countRfas()
	local rfas, rfbs = getRfasRfbsSeparate()
	return getTableLength(rfas)
end

function p.main( frame )
    -- Process the arguments.
    local args
    if frame == mw.getCurrentFrame() then
        args = frame:getParent().args
        for k, v in pairs( frame.args ) do
            args = frame.args
            break
        end
    else
        args = frame
    end    
    return makeReport( args )
end

return p