local args = {...}
local apis = args[2]
local term = args[4]
local getfile = args[5]
local computer = args[7]
local timeout = computer.time() + 5000

term.print("HBoot V1.0.0 //\n")
local w, h = term.getSize()

local kernel = load(getfile("/boot/Hyprkrnl.sys").readAllText())
local recovery = load(getfile("/boot/util/shell").readAllText())

-- Predeclare dbg so entries can reference it
local dbg = {}
local entries = {
    {"HyperionOS", function() kernel(args, nil, "/sbin/init") end},
    {"HyperionOS (Debug options)", dbg}
}

dbg[1] = {"Back", "BACK"}
dbg[2] = {"Boot HyperionOS in debug mode", function() kernel(args, true) end}
dbg[3] = {"Boot as shell", function() kernel(args, true, "/bin/bash") end}
dbg[4] = {"Boot in recovery", function() recovery(args) end}

local function render(tbl, selected)
    term.clear()
    term.print("HBoot V1.0.0 //\n\n")
    for i, v in ipairs(tbl) do
        if selected == i then
            term.print("> " .. v[1] .. "\n")
        else
            term.print("  " .. v[1] .. "\n")
        end
    end
end

-- Initial render
render(entries, 1)

-- Wait for keypress or timeout
local exit = false
while not exit do
    local ret = {computer.getMachineEvent()}
    if ret[1] == "keyPressed" then
        timeout = math.huge
        break
    end
    if timeout <= computer.time() then
        exit = true
        break
    end
end

-- Menu handling
if not exit then
    local menuStack = {}
    local currentMenu = entries
    local selected = 1
    render(currentMenu, selected)

    while true do
        local ret = {computer.getMachineEvent()}
        if ret[1] == "keyTyped" then
            if ret[3] == "\n" then
                local entry = currentMenu[selected]
                if entry then
                    if type(entry[2]) == "function" then
                        entry[2]()
                    elseif type(entry[2]) == "table" then
                        table.insert(menuStack, {currentMenu, selected})
                        currentMenu = entry[2]
                        selected = 1
                        render(currentMenu, selected)
                    elseif entry[2] == "BACK" then
                        if #menuStack > 0 then
                            local prev = table.remove(menuStack)
                            currentMenu, selected = prev[1], prev[2]
                            render(currentMenu, selected)
                        end
                    end
                end
            elseif ret[3] == "\x1b[A" then -- Up arrow
                if selected > 1 then
                    selected = selected - 1
                    render(currentMenu, selected)
                end
            elseif ret[3] == "\x1b[B" then -- Down arrow
                if selected < #currentMenu then
                    selected = selected + 1
                    render(currentMenu, selected)
                end
            end
        end
    end
else
    kernel(args)
end