local M = {}

-- Helper function to draw the menu
local function draw_menu(lines, keymaps)
    local buf = vim.api.nvim_create_buf(false, true)
    vim.api.nvim_buf_set_lines(buf, 0, -1, false, lines)
    vim.api.nvim_set_current_buf(buf)

    -- Local settings for the menu window
    vim.opt_local.number = false
    vim.opt_local.relativenumber = false
    vim.opt_local.buftype = "nofile"
    vim.opt_local.bufhidden = "wipe"
    vim.opt_local.cursorline = true

    -- Set keymaps for this menu
    local opts = { buffer = buf, noremap = true, silent = true }
    for key, cmd in pairs(keymaps) do
        vim.keymap.set("n", key, cmd, opts)
    end
end

-- The plugin sub-menu (called with 'p')
function M.open_plugins_menu()
    local lines = {
        "   MANAGE PLUGINS",
        "========================",
        "",
        "  [u]  Update (Sync)",
        "  [i]  Install",
        "  [a]  Add (Open List)",
        "  [b]  Back",
        "",
        "========================",
    }
    local keys = {
        u = ":PaqSync<CR>",
        i = ":PaqInstall<CR>",
        a = ":edit ~/.config/nvim/lua/plugins.lua<CR>",
        b = function() M.open() end, -- Returns to the main menu
    }
    draw_menu(lines, keys)
end

-- The main menu
function M.open()
    local lines = {
        "   Mono VIM - 0.17",
        "========================",
        "",
        "  [n]  New File",
        "  [r]  Recent Files",
        "  [p]  Plugins...",
        "  [q]  Quit",
        "",
        "========================",
    }
    local keys = {
        n = ":ene | startinsert<CR>",
        r = ":oldfiles<CR>",
        p = function() M.open_plugins_menu() end,
        q = ":q!<CR>",
    }
    draw_menu(lines, keys)
end

return M