local command = vim.api.nvim_create_user_command

local complete_plugin_names = function(arg, _, _)
    local inactive_plugs_starting_with_arg = vim.tbl_filter(
        function(p) return p.active == false and vim.startswith(p.spec.name, arg) end,
        vim.pack.get()
    )
    return vim.tbl_map(function(p) return p.spec.name end, inactive_plugs_starting_with_arg)
end

command(
    "DiffOrig",
    [[
      vert new
      setlocal buftype=nofile
      read ++edit #
      0d_
      diffthis
      wincmd p
      diffthis
    ]],
    { desc = "DiffOrig (see `:h DiffOrig`)" }
)

command("Pup", function(_) vim.pack.update() end, { desc = "Update packages" })
command(
    "Pdel",
    function(opts) vim.pack.del(vim.split(opts.args, " ")) end,
    { nargs = "*", complete = complete_plugin_names }
)

command(
    "LspLog",
    function() vim.cmd.tabnew(vim.lsp.log.get_filename()) end,
    { desc = "Opens the Nvim LSP client log." }
)

command("Align", function(_)
    -- TODO
end, {
    nargs = "*",
    range = true,
    desc = "align selection with respect to a substring",
})