-- This module returns a table that is suitable for use as a util.error registry,

-- and a function to return a util.error object given callback 'code' and 'body'

-- parameters.

local codes = require "net.http.codes";

local util_error = require "util.error";

local error_templates = {

	-- This code is used by us to report a client-side or connection error.

	-- Instead of using the code, use the supplied body text to get one of

	-- the more detailed errors below.

	[0] = {

		code = 0, type = "cancel", condition = "internal-server-error";

		text = "Connection or internal error";

	};

	-- These are net.http built-in errors, they are returned in

	-- the body parameter when code == 0

	["cancelled"] = {

		code = 0, type = "cancel", condition = "remote-server-timeout";

		text = "Request cancelled";

	};

	["connection-closed"] = {

		code = 0, type = "wait", condition = "remote-server-timeout";

		text = "Connection closed";

	};

	["certificate-chain-invalid"] = {

		code = 0, type = "cancel", condition = "remote-server-timeout";

		text = "Server certificate not trusted";

	};

	["certificate-verify-failed"] = {

		code = 0, type = "cancel", condition = "remote-server-timeout";

		text = "Server certificate invalid";

	};

	["connection failed"] = {

		code = 0, type = "cancel", condition = "remote-server-not-found";

		text = "Connection failed";

	};

	["invalid-url"] = {

		code = 0, type = "modify", condition = "bad-request";

		text = "Invalid URL";

	};

	["unable to resolve service"] = {

		code = 0, type = "cancel", condition = "remote-server-not-found";

		text = "DNS resolution failed";

	};

	-- This doesn't attempt to map every single HTTP code (not all have sane mappings),

	-- but all the common ones should be covered. XEP-0086 was used as reference for

	-- most of these.

	[400] = { type = "modify", condition = "bad-request" };

	[401] = { type = "auth", condition = "not-authorized" };

	[402] = { type = "auth", condition = "payment-required" };

	[403] = { type = "auth", condition = "forbidden" };

	[404] = { type = "cancel", condition = "item-not-found" };

	[405] = { type = "cancel", condition = "not-allowed" };

	[406] = { type = "modify", condition = "not-acceptable" };

	[407] = { type = "auth", condition = "registration-required" };

	[408] = { type = "wait", condition = "remote-server-timeout" };

	[409] = { type = "cancel", condition = "conflict" };

	[410] = { type = "cancel", condition = "gone" };

	[411] = { type = "modify", condition = "bad-request" };

	[412] = { type = "cancel", condition = "conflict" };

	[413] = { type = "modify", condition = "resource-constraint" };

	[414] = { type = "modify", condition = "resource-constraint" };

	[415] = { type = "cancel", condition = "feature-not-implemented" };

	[416] = { type = "modify", condition = "bad-request" };

	[422] = { type = "modify", condition = "bad-request" };

	[423] = { type = "wait", condition = "resource-constraint" };

	[429] = { type = "wait", condition = "resource-constraint" };

	[431] = { type = "modify", condition = "resource-constraint" };

	[451] = { type = "auth", condition = "forbidden" };

	[500] = { type = "wait", condition = "internal-server-error" };

	[501] = { type = "cancel", condition = "feature-not-implemented" };

	[502] = { type = "wait", condition = "remote-server-timeout" };

	[503] = { type = "cancel", condition = "service-unavailable" };

	[504] = { type = "wait", condition = "remote-server-timeout" };

	[507] = { type = "wait", condition = "resource-constraint" };

	[511] = { type = "auth", condition = "not-authorized" };

};

for k, v in pairs(codes) do

	if error_templates[k] then

		error_templates[k].code = k;

		error_templates[k].text = v;

	else

		error_templates[k] = { type = "cancel", condition = "undefined-condition", text = v, code = k };

	end

end

setmetatable(error_templates, {

	__index = function(_, k)

		if type(k) ~= "number" then

			return nil;

		end

		return {

			type = "cancel";

			condition = "undefined-condition";

			text = codes[k] or (k.." Unassigned");

			code = k;

		};

	end

});

local function new(code, body, context)

	if code == 0 then

		return util_error.new(body, context, error_templates);

	else

		return util_error.new(code, context, error_templates);

	end

end

return {

	registry = error_templates;

	new = new;

};