mc

-- Midnight Commander CC edition by RedTeapot

print("Starting Midnight Commander v0.1")

-- For tablet computers
local screen_width, screen_height = term.getSize()

local state = {}
state.path = {}
state.path[1] = "/"

state.entry = {}
state.entry.selected = 0
state.entry.total = 1
state.entry.list = {}

state.ui = {}
state.ui.entries_per_screen = screen_height - 3
state.ui.scroll = 0

local function get_path_string()
    local result = ""
    for i = 1, #state.path do
        result = result .. state.path[i]
        if i < #state.path and i > 1 then
            result = result .. "/"
        end
    end
    if #result > 1 then
        result = result .. "/"
    end
    return result
end

local function draw_header()
    term.setCursorPos(1, 1)
    term.setBackgroundColor(colors.blue)
    term.setTextColor(colors.lightBlue)
    term.clearLine()
    term.setCursorPos(1, 1)
    term.write("Midnight Commander v0.1")
end

local function draw_subheader()
    term.setCursorPos(1, 2)
    term.setBackgroundColor(colors.blue)
    term.setTextColor(colors.white)
    term.clearLine()
    term.write(get_path_string())
end

local function get_current_entries()
    local cd = get_path_string()
    local entries = fs.list(cd)
    entries[0] = ".."

    state.entry.list = entries
    state.entry.total = #entries
    return entries
end

local function draw_files_list()
    term.setCursorPos(1, 3)
    term.setBackgroundColor(colors.black)
    term.setTextColor(colors.white)

    local height = screen_height - 1 -- minus 1 for bottom panel

    local entries = get_current_entries()
    local current_dir = get_path_string()

    for i = 3, height do
        local file_num = i - 3 + state.ui.scroll
        if file_num >= 0 and file_num <= #entries then
            local path = current_dir .. entries[file_num]
            term.setCursorPos(1, i)
            if file_num == state.entry.selected then
                term.setBackgroundColor(colors.gray)
            else
                term.setBackgroundColor(colors.black)
            end
            if entries[file_num] == ".." then
                term.setTextColor(colors.green)
            elseif fs.isDir(path) then
                term.setTextColor(colors.yellow)
            else
                term.setTextColor(colors.white)
            end

            term.clearLine()
            term.write(entries[file_num])
        else
            term.setCursorPos(1, i)
            term.setBackgroundColor(colors.black)
            term.clearLine()
        end
    end
end

local function draw_bottom_panel()
    term.setCursorPos(1, screen_height)
    term.setBackgroundColor(colors.blue)
    term.setTextColor(colors.white)
    term.clearLine()
    term.write("F10: Quit")
end

local function draw()
    term.setCursorPos(1, 1)
    term.clear()
    term.setCursorPos(1, 1)

    draw_header()
    draw_subheader()
    draw_files_list()
    draw_bottom_panel()
end

local function open()
    local entry = state.entry.list[state.entry.selected]

    if entry == ".." and #state.path > 1 then
        state_path_old = state.path
        state.path = {}
        for i = 1, #state_path_old - 1 do
            state.path[i] = state_path_old[i]
        end
        state.entry.selected = 0
    else
        local path = get_path_string() .. state.entry.list[state.entry.selected]

        if fs.isDir(path) then
            state.path[#state.path + 1] = state.entry.list[state.entry.selected]
        end
        state.entry.selected = 0
    end
end

draw()

while true do
    event, arg1, arg2, arg3 = os.pullEvent()
    if event == "key" then
        key = keys.getName(arg1)
        if key == "up" then
            if state.entry.selected > 0 then
                state.entry.selected = state.entry.selected - 1
            end
        elseif key == "down" then
            if state.entry.selected < state.entry.total then
                state.entry.selected = state.entry.selected + 1
            end
        elseif key == "f10" then
            break
        elseif key == "enter" then
            open()
        end
        draw()
    elseif event == "mouse_click" then
        btn = arg1
        x = arg2
        y = arg3

        if btn == 1 then
            if y > 2 and y < screen_height then
                local entry = y - 3
                if state.entry.selected == entry then
                    open()
                else
                    state.entry.selected = y - 3
                end
            end
        end

        draw()
    end
end

term.setBackgroundColor(colors.black)
term.setTextColor(colors.white)
term.clear()
term.setCursorPos(1, 1)