-- Use double backslashes
vim.api.nvim_set_hl(0, 'InvisibleChar', { bg = '#ff0000', fg = '#ffffff' })

vim.api.nvim_create_autocmd({ 'BufEnter', 'BufWritePost', 'TextChanged', 'InsertLeave' }, {
  group = vim.api.nvim_create_augroup('InvisibleChars', { clear = true }),
  callback = function()
    vim.fn.clearmatches()
    vim.fn.matchadd('InvisibleChar', '\\%u2028\\|\\%u200b\\|\\%u200c\\|\\%u200d\\|\\%u2029\\|\\%ufeff')
  end
})

vim.api.nvim_create_autocmd({ 'FileType' }, {
    group = vim.api.nvim_create_augroup('TabWidth', { clear = true }),
    pattern = "html,dart,vue,javascript,typescript,typescriptreact,json,markdown,css,sass",
    callback = function()
        vim.opt_local.tabstop = 2
        vim.opt_local.softtabstop = 2
        vim.opt_local.shiftwidth = 2
    end,
})

vim.api.nvim_create_autocmd({ 'FileType' }, {
    group = vim.api.nvim_create_augroup('DartCommentString', { clear = true }),
    pattern = 'dart',
    callback = function()
        vim.bo.commentstring = '// %s'
    end
})

vim.api.nvim_create_autocmd({ 'FileType' }, {
    group = vim.api.nvim_create_augroup('PhpIndent', { clear = true }),
    pattern = 'php',
    callback = function()
        vim.opt_local.smartindent = false
        vim.opt_local.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
    end
})

vim.api.nvim_create_autocmd({ 'BufWritePre' }, {
    group = vim.api.nvim_create_augroup('RemoveTrailingWhitespace', { clear = true }),
    command = [[%s/\s\+$//e]],
})

vim.api.nvim_create_autocmd({ 'BufRead', 'BufNewFile' }, {
    group = vim.api.nvim_create_augroup('DockerExtensionFiletype', { clear = true }),
    pattern = { '*.docker' },
    callback = function()
        vim.opt_local.syntax = 'dockerfile'
    end
})

vim.api.nvim_create_autocmd({ 'BufReadPost' }, {
    group = vim.api.nvim_create_augroup('LastCursorPosition', { clear = true }),
    callback = function(event)
        local exclude = { 'gitcommit', 'commit', 'gitrebase' }
        local buf = event.buf
        if
            vim.tbl_contains(exclude, vim.bo[buf].filetype)
            or vim.b[buf].last_loc
        then
            return
        end
        vim.b[buf].last_loc = true
        local mark = vim.api.nvim_buf_get_mark(buf, '"')
        local lcount = vim.api.nvim_buf_line_count(buf)
        if mark[1] > 0 and mark[1] <= lcount then
            pcall(vim.api.nvim_win_set_cursor, 0, mark)
        end
    end,
})

vim.api.nvim_create_autocmd({ 'TextYankPost' }, {
    group = vim.api.nvim_create_augroup('YankHighlight', { clear = true }),
    callback = function()
        vim.hl.on_yank({ timeout = 250 })
    end
})

vim.api.nvim_create_autocmd('BufWritePre', {
  callback = function()
    local dir = vim.fn.expand('<afile>:p:h')
    if vim.fn.isdirectory(dir) == 0 then
      vim.fn.mkdir(dir, 'p')
    end
  end,
})

-- Better indentation for PHP arrays
vim.api.nvim_create_autocmd('FileType', {
  pattern = 'php',
  callback = function()
    vim.opt_local.indentkeys:remove('0#')
  end,
})

-- Enable spell check for markdown and git commits
vim.api.nvim_create_autocmd('FileType', {
  pattern = {'markdown', 'gitcommit'},
  callback = function()
    vim.opt_local.spell = true
    vim.opt_local.spelllang = 'en_us'
  end,
})

-- Auto-close unused buffers after 20 minutes
vim.api.nvim_create_autocmd('BufHidden', {
  callback = function(event)
    if vim.bo[event.buf].buftype == '' then
      vim.defer_fn(function()
        if vim.api.nvim_buf_is_valid(event.buf) and not vim.api.nvim_buf_is_loaded(event.buf) then
          vim.api.nvim_buf_delete(event.buf, { force = false })
        end
      end, 1200000) -- 20 minutes
    end
  end,
})