#!/usr/bin/env luajit

local args = {...}

verbosity = -1
local logFile
local html = false


--[[ 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 .. " error"
    elseif e ~= 0 then
	result = e .. " errors"
    end
    if ("" ~= result) and html then result = "<font color='red'><b>" .. result .. "</b></font>" end
--    result = " " .. result
    if 0 < w then
	if 0 < e then result = result .. ", " end
	if 1 == w then 
	    result = result .. w .. " warning"
	else
	    result = result .. w .. " warnings"
	end
	if ("" ~= result) and html then result = "<font color='yellow'><b>" .. result .. "</b></font>" end
--	result = " " .. result
    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"] then
	    if nil ~= mirrors["deb.devuan.org"].IPs["deb.roundr.devuan.org"][IP] then
		if html then
		    return "<font color='purple'><b>DNS-RR</b></font>"
		else
		    return "DNS-RR"
		end
	    end
	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
    local s = nil ~= mirrors[host].Protocols[typ]
    local to = false
    if ('http' ~= typ) and ('https' ~= typ) and ('ftp' ~= typ) and ('rsync' ~= typ) then s = true end
    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
		if 0 <= v.errors   then e = e + v.errors   else to = true end
		if 0 <= v.warnings then w = w + v.warnings else to = true end
	    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
			    if 0 <= u.errors   then e = e + u.errors   else to = true end
			    if 0 <= u.warnings then w = w + u.warnings else to = true end
			end
		    end
		end
	    end
	end
    end

    if to then
	result = "[TIMEOUT"
	if not s then result = result .. "*" end
	if html then
	    if s then
		result = "[<font color='blue'><b>TIMEOUT</b></font>"
	    else
		result = "[<font color='darkblue'><b>TIMEOUT*</b></font>"
	    end
	end
    elseif 0 < e then
	result = "[FAILED"
	if not s then result = result .. "*" end
	if html then
	    if s then
		result = "[<font color='red'><b>FAILED</b></font>"
	    else
		result = "[<font color='darkred'><b>FAILED*</b></font>"
	    end
	end
	if html then
	    faulty = faulty .. host .. " (" .. typ .. ")<br>\n"
	else
	    faulty = faulty .. host .. " (" .. typ .. ")\n"
	end
    else
	result = "[OK"
	if not s then result = result .. "*" end
	if html then
	    if s then
		result = "[<font color='lime'><b>OK</b></font>"
	    else
		result = "[<font color='darkgreen'><b>OK*</b></font>"
	    end
	end
    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 html then
	    if nil == ip then
		log = "<a href='" .. nm .. "'>" .. domain .. "</a>"
	    else
		log = "<a href='" .. nm .. "'>" .. ip .. "</a>"
	    end
	end
	log = log .. plurals(errors, warnings)
    end
    return log
end


html = false
local email, e = io.open("results/Report-email.txt", "w+")
if nil == email then C("opening mirrors file - " .. e) else
    email:write( "Dear Mirror Admins,\n\n" ..
		"This is the status of the mirror servers in the Devuan package mirror network.\n\n" ..
		"The full list of Devuan package mirrors is available at the URL:\n\n" ..
		" https://pkgmaster.devuan.org/mirror_list.txt\n\n" ..
		'Please contact "mirrors@devuan.org" if any of the information \nin the file above needs to be amended. \n\n' ..
		"The full results of the mirror checking is available at the URL:\n\n" ..
		" https://sledjhamr.org/apt-panopticon/results/Report-web.html\n\n" ..
		"Due to the nature of the tests, some errors or warnings will be \ncounted several times.  " ..
		"Refer to the logs on the web page for details.\n\n" ..
		"Please see below the current status of the Devuan Package Mirror \nnetwork:\n\n" ..
		"==== package mirror status " .. os.date("!%Y-%m-%d %H:%M") .. " GMT ====\n" ..
		"[skip] means that the test hasn't been written yet.\n\n")
    for k, v in orderedPairs(mirrors) do
	local results = loadfile("results/" .. k .. ".lua")()
	email:write(k .. "....\n")
	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 ftp	= "[skip]"
	local http	= status(k, results, "http")
	local https	= status(k, results, "https")
	local rsync	= "[skip]"
	local dns	= ""
	local protocol	= status(k, results, "Protocol")
	local sanity	= "[skip]"
	local integrity = status(k, results, "Integrity")
	local updated	= status(k, results, "Updated")

	-- DNS-RR test.
	if ("deb.devuan.org" ~= k) and (nil ~= mirrors["deb.devuan.org"]) 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 .. "  " end
				dns = dns .. logCount("deb.devuan.org", i)
			    else
				if "" == dns then dns = " " else dns = dns .. "  " end
				dns = dns .. i
			    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 .. "  " end
			    dns = dns .. log
			else
			    if "" == dns then dns = " " else dns = dns .. "  " end
			    dns = dns .. l
			end
		    end
		end
	    end
	    if "" == dns then dns = "[no]" end
	    dns = " DNS-RR: " .. dns
	end

	email:write(	"      ftp: " .. ftp .. " http: " .. http .. " https: " .. https .." rsync: " .. rsync .. "\n" ..
			"     " .. dns .. "\n" ..
			"      Protocol: " .. protocol .. " URL-sanity: " .. sanity .. " Integrity: " .. integrity .. "\n" ..
			"      Updated: " .. updated .. "\n")
    end
    email:write( "\n==== faulty mirrors: ====\n" .. faulty)
    email:write( "\n-------------------------\n\n" ..
		"* This means that this protocol isn't actually supported, but the test was run ayway.\n\n" ..
		"Thanks for your precious help in ensuring that Devuan GNU+Linux \nremains a universal, stable, dependable, free operating system.\n\n" ..
		"You can get the source code from https://sledjhamr.org/cgit/apt-panopticon/about/ .\n\n" ..
		"Love\n\n" ..
		"The Dev1Devs\n\n")
    email:close()
end


results = {}
m = {}
faulty = ""
html = true
local web, e = io.open("results/Report-web.html", "w+")
if nil == web then C("opening mirrors file - " .. e) else
    web:write( "<html><head><title>apt-panopticon results</title>\n" ..
		'</head><body bgcolor="black" text="white">' ..
		"<h1>Welcome to the apt-panopticon results page.</h1>\n" ..
		"<p>This is the status of the mirror servers in the Devuan package mirror network.</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; " ..
		"The links in the table and DNS list go to the detailed testing logs.</p>\n\n" ..
		"<hr>\n<h2>==== package mirror status " .. os.date("!%Y-%m-%d %H:%M") .. " GMT ====</h2>\n<table>\n" ..

		"<p>[<font color='red'><b>FAILED</b></font>] or [<font color='lime'><b>OK</b></font>]" ..
		" means the tested thing is supported for that mirror.</p>\n" ..
		"<p>[<font color='darkred'><b>FAILED*</b></font>] or [<font color='darkgreen'><b>OK*</b></font>]" ..
		" means the tested thing is unsupported for that mirror, but might have been tested anyway.</p>\n" ..
		"<p>[<font color='blue'><b>TIMEOUT</b></font>] or [<font color='darkblue'><b>TIMEOUT</b></font>]" ..
		" means the server had too many timeouts, and tests where aborted, so there is no result for this test.</p>" ..
		"<p>The DNS round robin (DNS-RR) column shows the IPs for that mirror, or [<font color='grey'><b>no</b></font>] if it isn't part of the DNS-RR. &nbsp; " ..
		"The IPs link to the testing log for that IP accessed via the DNS-RR. &nbsp; " ..
		"deb.devuan.org is the DNS-RR itself, so it doesn't get tested directly.</p>\n" ..
		"<p>The time in the Updated column is how often the mirror updates itself.</p>" ..
		"<p>Mirrors with a <font style='background-color:dimgrey'>grey background</font> are not active (though may be usable as part of the DNS-RR).</p>\n" ..
		"<p>[<font color='grey'><b>skip</b></font>] means that the test hasn't been written yet.</p>\n" ..
		"<tr><th></th><th>FTP</th><th>HTTP</th><th>HTTPS</th><th>RSYNC</th><th>DNS round robin</th><th>Protocol</th><th>URL sanity</th><th>Integrity</th><th>Updated</th></tr>\n"
		)
    for k, v in orderedPairs(mirrors) do
	local results = loadfile("results/" .. k .. ".lua")()
	local active = ""
	if "yes" == v.Active then
	    web:write("     <tr><th>" .. k .. "</th> ")
	else
	    if nil == v.Active then active = 'nil' else active = v.Active end
	    web:write("     <tr style='background-color:dimgrey'><th>" .. k .. "</th> ")
	end
	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 ftp	= "[<font color='grey'><b>skip</b></font>]"
	local http	= status(k, results, "http")
	local https	= status(k, results, "https")
	local rsync	= "[<font color='grey'><b>skip</b></font>]"
	local dns	= ""
	local protocol	= status(k, results, "Protocol")
	local sanity	= "[<font color='grey'><b>skip</b></font>]"
	local integrity = status(k, results, "Integrity")
	local updated	= status(k, results, "Updated")
	local rate = v.Rate
	if nil ~= rate then updated = updated .. ' ' .. rate end

	-- DNS-RR test.
	if ("deb.devuan.org" ~= k) and (nil ~= mirrors["deb.devuan.org"]) 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 = "[<font color='grey'><b>no</b></font>]" end
	end

	web:write("<td>" .. ftp .. "&nbsp;</td><td>" .. http .. "&nbsp;</td><td>" .. https .. "&nbsp;</td><td>" .. rsync .. "&nbsp;</td><td>" .. dns ..
		    "&nbsp;</td><td>" .. protocol .. "&nbsp;</td><td>" .. sanity ..
		    "&nbsp;</td><td>" .. integrity .. "&nbsp;</td><td>" .. updated .. "</td></tr>\n")
	if "" ~= v.Active then
	    web:write("<tr><td style='background-color:dimgrey'>" .. active .. "</td></tr>\n")
	end
    end
    web:write( "</table>\n<br>\n<h2>==== faulty mirrors: ====</h2>\n" .. faulty)
    web: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
    web:write(	"<p>This lists each mirror, and the DNS entries for that mirror. &nbsp; " ..
		"The links point to the testing log files for " .. logCount("apt-panopticon") .. " for each domain name / IP combination that was tested. &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; " ..
		"If an IP is part of the DNS-RR, it is marked with '<font color='purple'><b>DNS-RR</b></font>' &nbsp; " ..
		"pkgmaster.devuan.org is the master mirror, all the others sync to it. &nbsp; " ..
		"</p>\n"
		)
    web:write(dumpTableHTML(m, "", ""))
    web:write( "\n<br>\n<hr>\n\n" ..
		"<p>The <a href='Report-email.txt'>email report</a>. &nbsp; " ..
		"All <a href='../results'>the logs and other output</a>. &nbsp; " ..
		"You can get the <a href='https://sledjhamr.org/cgit/apt-panopticon/about/'>source code here</a>.</p>" ..
		"</body></html>\n")
    web:close()
end