--
-- Copyright (c) 2015 Pedro Souza <pedrosouza@freebsd.org>
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions
-- are met:
-- 1. Redistributions of source code must retain the above copyright
--    notice, this list of conditions and the following disclaimer.
-- 2. Redistributions in binary form must reproduce the above copyright
--    notice, this list of conditions and the following disclaimer in the
--    documentation and/or other materials provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-- ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-- ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-- LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-- OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-- SUCH DAMAGE.
--
-- $FreeBSD$
--

local core = {};

-- Commonly appearing constants
core.KEY_ENTER = 13
core.KEY_BACKSPACE = 127

function core.setVerbose(b)
	if (b == nil) then
		b = not core.verbose;
	end

	if (b == true) then
		loader.setenv("boot_verbose", "YES");
	else
		loader.unsetenv("boot_verbose");
	end
	core.verbose = b;
end

function core.setSingleUser(b)
	if (b == nil) then
		b = not core.su;
	end

	if (b == true) then
		loader.setenv("boot_single", "YES");
	else
		loader.unsetenv("boot_single");
	end
	core.su = b;
end

function core.getACPIPresent(checkingSystemDefaults)
	local c = loader.getenv("hint.acpi.0.rsdp");

	if (c ~= nil) then
		if (checkingSystemDefaults == true) then
			return true;
		end
		-- Otherwise, respect disabled if it's set
		c = loader.getenv("hint.acpi.0.disabled");
		return (c == nil) or (tonumber(c) ~= 1);
	end
	return false;
end

function core.setACPI(b)
	if (b == nil) then
		b = not core.acpi;
	end

	if (b == true) then
		loader.setenv("acpi_load", "YES");
		loader.setenv("hint.acpi.0.disabled", "0");
		loader.unsetenv("loader.acpi_disabled_by_user");
	else
		loader.unsetenv("acpi_load");
		loader.setenv("hint.acpi.0.disabled", "1");
		loader.setenv("loader.acpi_disabled_by_user", "1");
	end
	core.acpi = b;
end

function core.setSafeMode(b)
	if (b == nil) then
		b = not core.sm;
	end
	if (b == true) then
		loader.setenv("kern.smp.disabled", "1");
		loader.setenv("hw.ata.ata_dma", "0");
		loader.setenv("hw.ata.atapi_dma", "0");
		loader.setenv("hw.ata.wc", "0");
		loader.setenv("hw.eisa_slots", "0");
		loader.setenv("kern.eventtimer.periodic", "1");
		loader.setenv("kern.geom.part.check_integrity", "0");
	else
		loader.unsetenv("kern.smp.disabled");
		loader.unsetenv("hw.ata.ata_dma");
		loader.unsetenv("hw.ata.atapi_dma");
		loader.unsetenv("hw.ata.wc");
		loader.unsetenv("hw.eisa_slots");
		loader.unsetenv("kern.eventtimer.periodic");
		loader.unsetenv("kern.geom.part.check_integrity");
	end
	core.sm = b;
end

function core.kernelList()
	local k = loader.getenv("kernel");
	local v = loader.getenv("kernels") or "";

	local kernels = {};
	local i = 0;
	if k ~= nil then
		i = i + 1;
		kernels[i] = k;
	end

	for n in v:gmatch("([^; ]+)[; ]?") do
		if n ~= k then
			i = i + 1;
			kernels[i] = n;
		end
	end
	return kernels;
end

function core.setDefaults()
	core.setACPI(core.getACPIPresent(true));
	core.setSafeMode(false);
	core.setSingleUser(false);
	core.setVerbose(false);
end

function core.autoboot()
	loader.perform("autoboot");
end

function core.boot()
	loader.perform("boot");
end

function core.bootserial()
	local c = loader.getenv("console");

	if c ~= nil then
		if c:find("comconsole") ~= nil then
			return true;
		end
	end

	local s = loader.getenv("boot_serial");
	if s ~= nil then
		return true;
	end

	local m = loader.getenv("boot_multicons");
	if m ~= nil then
		return true;
	end
	return false;
end

core.acpi = core.getACPIPresent(false)
return core