local misc = require('core.misc')
local auto, augroup = misc.auto, misc.augroup

-- auto commands which interact with bufferes without modifying them
local bufcheck = augroup('bufcheck')
-- auto commands which modify things on the filesystem
local fsmod = augroup('fsmod')

auto('FocusGained', {
  group = bufcheck,
  desc = 'Update contents of file.',
  command = 'checktime',
})

auto('TextYankPost', {
  group = bufcheck,
  desc = 'Highlight on yank.',
  callback = function()
    vim.highlight.on_yank { timeout = 250 }
  end
})

auto('BufRead', {
  group = bufcheck,
  desc = 'Return to the last place the buffer was closed in.',
  callback = function()
    vim.cmd.call([[setpos(".", getpos("'\""))]])
  end
})

auto('BufWritePre', {
  group = fsmod,
  desc = 'remove trailing spaces on file save',
  callback = function()
    local pos = vim.api.nvim_win_get_cursor(0)
    vim.cmd([[%s/\s\+$//e]])
    vim.api.nvim_win_set_cursor(0, pos)
  end
})

auto('BufWritePre', {
  group = fsmod,
  desc = 'Basically mkdir -p.',
  callback = function(ctx)
    if ctx.match:match("^%w%w+://") then return end
    local dir = vim.fn.fnamemodify(ctx.file, ':p:h')
    vim.fn.mkdir(dir, 'p')
  end
})