#!/usr/bin/env luajit

local args = {...}

verbosity = -1
local logFile


--[[ Ordered table iterator, allow to iterate on the natural order of the keys of a table.
    From http://lua-users.org/wiki/SortedIteration
  ]]
function __genOrderedIndex( t )
    local orderedIndex = {}
    for key in pairs(t) do
        table.insert( orderedIndex, key )
    end
    table.sort( orderedIndex )
    return orderedIndex
end
function orderedNext(t, state)
    -- Equivalent of the next function, but returns the keys in the alphabetic
    -- order. We use a temporary ordered key table that is stored in the
    -- table being iterated.

    local key = nil
    --print("orderedNext: state = "..tostring(state) )
    if state == nil then
        -- the first time, generate the index
        t.__orderedIndex = __genOrderedIndex( t )
        key = t.__orderedIndex[1]
    else
        -- fetch the next value
        for i = 1,table.getn(t.__orderedIndex) do
            if t.__orderedIndex[i] == state then
                key = t.__orderedIndex[i+1]
            end
        end
    end

    if key then
        return key, t[key]
    end

    -- no more value to return, cleanup
    t.__orderedIndex = nil
    return
end
function orderedPairs(t)
    -- Equivalent of the pairs() function on tables. Allows to iterate
    -- in order
    return orderedNext, t, nil
end

-- Use this to dump a table to a string, with HTML.
dumpTableHTML = function (table, space, name)
    local r = name .. "\n"
    r = r .. dumpTableHTMLSub(table, space .. " ")
    r = r .. space .. ""
    return r
end
dumpTableHTMLSub = function (table, space)
    local r = ""
    for k, v in orderedPairs(table) do 
	if type(v) == "table" then
	    if " " == space then
		r = r ..           space .. dumpTableHTML(v, space, k .. "<ul>") .. "</ul>\n"
	    else
		r = r .. "<li>" .. space .. dumpTableHTML(v, space, k .. "<ul>") .. "</ul></li>\n"
	    end
	else
	    r = r .. space .. "<li>" .. k .. "</li>\n"
	end
    end
    return r
end

local plurals = function(e, w)
    local result = ""
    if 1 == e then
	result = e .. " <font color='red'><b>error</b></font>"
    elseif e ~= 0 then
	result = e .. " <font color='red'><b>errors</b></font>"
    end
    if 0 < w then
	if 0 < e then result = result .. ", " end
	if 1 == w then 
	    result = result .. w .. " <font color='yellow'><b>warning</b></font>"
	else
	    result = result .. w .. " <font color='yellow'><b>warnings</b></font>"
	end
    end
    if "" ~= result then result = " (" .. result .. ")" end
    return result
end

local results = {}

local log = function(v, t, s, prot, test, host)
    local x = ""
    if nil == prot then prot = "" end
    if nil ~= test then x = x .. test else test = "" end
    if nil ~= host then
	if #x > 0 then x = x .. " " end
	x = x .. host
    end
    if #x > 0 then
	t = t .. "(" .. x ..  ")"
    end
    if v <= verbosity then
	if 3 <= verbosity then t = os.date() .. " " .. t end
	print(t .. ": " .. s)
    end
    if nil ~= logFile then
	logFile:write(os.date() .. " " .. t .. ": " .. s .. "\n")
	logFile:flush()
    end
end
local D = function(s) log(3,  "DEBUG   ", s) end
local I = function(s) log(2,  "INFO    ", s) end
local W = function(s, p, t, h) log(1,  "WARNING ", s, p, t, h) end
local E = function(s, p, t, h) log(0,  "ERROR   ", s, p, t, h) end
local C = function(s) log(-1, "CRITICAL", s) end

local mirrors = loadfile("results/mirrors.lua")()

local revDNS = function(dom, IP)
    if "deb.devuan.org" ~= dom then
	if nil ~= mirrors["deb.devuan.org"].IPs["deb.roundr.devuan.org"][IP] then
	    return "DNS-RR"
	end
    else
	for k, v in pairs(mirrors) do
	    if "deb.devuan.org" ~= k then
		local IPs = v.IPs
		for i, u in pairs(IPs) do
		    if "table" == type(u) then
			for h, t in pairs(u) do
			    if IP == h then return k end
			end
		    else
			if IP == i then return k end
		    end
		end
	    end
	end
    end
    return ""
end

local faulty = ""
local status = function(host, results, typ)
    local result = ""
    local e = 0
    local w = 0
    if nil ~= results[typ] then
	e = results[typ].errors
	w = results[typ].warnings
	for k, v in pairs(results[typ]) do
	    if "table" == type(v) then
		e = e + v.errors
		w = w + v.warnings
	    end
	end
    else
	for k, v in pairs(results) do
	    if "table" == type(v) then
		for i, u in pairs(v) do
		    if "table" == type(u) then
			if typ == i then
			    e = e + u.errors
			    w = w + u.warnings
			end
		    end
		end
	    end
	end
    end

    if 0 < e then
	result = "[<font color='red'><b>FAILED</b></font>]"
	faulty = faulty .. host .. " (" .. typ .. ")<br>\n"
    else
	result = "[<font color='green'><b>OK</b></font>]"
    end
    return result .. plurals(e, w)
end

local collate = function(host, ip, results)
    local f = "results/" .. host .. "_" .. ip .. ".lua"
    local rfile, e = io.open(f, "r")
    if nil == rfile then I("opening " .. f .. " file - " .. e) else
	rfile:close()
	local rs = loadfile(f)()
	for k, v in pairs(rs) do
	    if "table" == type(v) then
		for i, u in pairs(v) do
		    if "table" == type(u) then
			for h, t in pairs(u) do
			    local a = results[k][h]
			    if nil == a then a = 0 end
			    results[k][h] = a + t
			end
		    else
			local a = results[k][i]
			if nil == a then a = 0 end
			results[k][i] = a + u
		    end
		end
	    else
		local a = results[k]
		if nil == a then a = 0 end
		results[k] = a + v
	    end
	end
    end
    return results
end

local m = {}

local logCount = function(domain, ip)
    local nm = "LOG_" .. domain
    local log = ""
    local extra = ""
    if nil ~= ip then nm = nm .. "_" .. ip end
    nm = nm .. ".html"
    local rfile, e = io.open("results/" .. nm, "r")
    if nil ~= rfile then
	local errors = 0
	local warnings = 0
	for l in rfile:lines() do
	    if nil ~= l:match("><b>ERROR ") then errors = errors + 1 end
	    if nil ~= l:match("><b>WARNING ") then warnings = warnings + 1 end
	end
	rfile:close()
	if nil == ip then
	    log = "<a href='" .. nm .. "'>" .. domain .. "</a>"
	else
	    log = "<a href='" .. nm .. "'>" .. ip .. "</a>"
	end
	log = log .. plurals(errors, warnings)
    end
    return log
end

local file, e = io.open("results/Report-web.html", "w+")
if nil == file then C("opening mirrors file - " .. e) else
    file:write( "<html><head><title>apt-panopticon results</title>\n" ..
		'</head><body bgcolor="black" text="white" alink="red" link="blue" vlink="purple">' ..
		"<h1>Welcome to the apt-opticon results page.</h1>\n" ..
		"<p>Check time: " .. os.date("!%a %b %d %T %Z %Y") .. "</p>\n" ..
		"<p>The full list of Devuan package mirrors is available at the URL: " ..
		"<a href='https://pkgmaster.devuan.org/mirror_list.txt'>https://pkgmaster.devuan.org/mirror_list.txt</a></p>\n" ..
		"<p>Due to the nature of the tests, some errors or warnings will be counted several times. &nbsp; " ..
		"Refer to the logs below for details.</p>\n\n" ..
		"<p>Please see below the current status of the Devuan Package Mirror network:</p>\n" ..
		"<h2>==== mirror status: ====</h2>\n<table>\n"
		)
    for k, v in orderedPairs(mirrors) do
	local results = loadfile("results/" .. k .. ".lua")()
	file:write("     <tr><th>" .. k .. "</th> ")
	local IPs = v.IPs
	for i, u in pairs(IPs) do
	    if "table" == type(u) then
		for h, t in pairs(u) do
		    results = collate(k, h, results)
		end
	    else
		results = collate(k, i, results)
	    end
	end
	local http	= status(k, results, "http")
	local https	= status(k, results, "https")
	local dns	= ""
	local protocol	= status(k, results, "Protocol")
	local sanity	= "[<font color='gray'><b>skip</b></font>]"
	local integrity = "[<font color='gray'><b>skip</b></font>]"
	local updated	= "[<font color='gray'><b>skip</b></font>]"

	-- DNS-RR test.
	if "deb.devuan.org" ~= k then
	    for l, w in pairs(mirrors[k].IPs) do
		if type(w) == "table" then
		    for i, u in pairs(w) do
			if nil ~= mirrors["deb.devuan.org"].IPs["deb.roundr.devuan.org"][i] then
			    local log = logCount("deb.devuan.org", i)
			    if "" ~= log then
				if "" == dns then dns = " " else dns = dns .. " &nbsp; " end
				dns = dns .. logCount("deb.devuan.org", i)
			    else
				if "" == dns then dns = " " else dns = dns .. " &nbsp; " end
				dns = dns .. "<font color='maroon'><b>" .. i .. "</b></font>"
			    end
			end
		    end
		else
		    if nil ~= mirrors["deb.devuan.org"].IPs["deb.roundr.devuan.org"][l] then
			local log = logCount("deb.devuan.org", l)
			if "" ~= log then
			    if "" == dns then dns = " " else dns = dns .. " &nbsp; " end
			    dns = dns .. log
			else
			    if "" == dns then dns = " " else dns = dns .. " &nbsp; " end
			    dns = dns .. "<font color='maroon'><b>" .. l .. "</b></font>"
			end
		    end
		end
	    end
	    if "" == dns then dns = "DNS-RR: [<font color='gray'><b>no</b></font>]" else dns = "DNS-RR:" .. dns end
	end

	file:write("<td>http: " .. http .. "&nbsp;</td><td>https: " .. https .. "&nbsp;</td><td>" .. dns ..
		    "&nbsp;</td><td>Protocol: " .. protocol .. "&nbsp;</td><td>URL-sanity: " .. sanity ..
		    "&nbsp;</td><td>Integrity: " .. integrity .. "&nbsp;</td><td>Updated: " .. updated .. "</td></tr>\n")
    end
    file:write( "</table>\n<br>\n<h2>==== faulty mirrors: ====</h2>\n" .. faulty)
    file:write( "<br>\n<br>\n<h2>==== DNS and logs: ====</h2>\n")

    for k, v in pairs(mirrors) do
	local log = k
	local n = {}
	log = logCount(k)
	mirrors[k].Protocols = nil
	mirrors[k].FQDN = nil
	mirrors[k].Active = nil
	mirrors[k].Rate = nil
	mirrors[k].BaseURL = nil
	mirrors[k].Country = nil
	mirrors[k].Bandwidth = nil
	for l, w in pairs(mirrors[k].IPs) do
	    if type(w) == "table" then
		n[l] = {}
		for i, u in pairs(w) do
		    local log = logCount(k, i)
		    if "" == log then n[l][i] = u else n[l][log .. " " .. revDNS(k, i)] = u end
		end
	    else
		local log = logCount(k, l)
		if "" == log then n[l] = w else n[log .. " " .. revDNS(k, l)] = w end
	    end
	end
	m[log .. " DNS entries -"] = n
    end
    file:write(	"<p>This lists each mirror, and the DNS entries for that mirror. &nbsp; " ..
		"The links point to the log files for " .. logCount("apt-panopticon") .. " for each FDQN / IP combination that was checked. &nbsp; " ..
		"If a mirror has a CNAME, that CNAME is listed along with that CNAMEs DNS entries. &nbsp; " ..
		"deb.devuan.org is the DNS round robin, which points to the mirrors that are part of the DNS-RR. &nbsp; " ..
		"pkgmaster.devuan.org is the master mirror, all the others sync to it. &nbsp; " ..
		"</p>\n"
		)
    file:write(dumpTableHTML(m, "", ""))
    file:write( "\n<br>\n\n" ..
		"<p>The <a href='Report-email.txt'>email report</a>.</p>" ..
		"<p>All <a href='../results'>the logs and other output</a>.</p>" ..
		"</body></html>\n")
    file:close()
end