---@brief
---
--- https://github.com/sveltejs/language-tools/tree/master/packages/language-server
---
--- Note: assuming that [ts_ls](#ts_ls) is setup, full JavaScript/TypeScript support (find references, rename, etc of symbols in Svelte files when working in JS/TS files) requires per-project installation and configuration of [typescript-svelte-plugin](https://github.com/sveltejs/language-tools/tree/master/packages/typescript-plugin#usage).
---
--- `svelte-language-server` can be installed via `npm`:
--- ```sh
--- npm install -g svelte-language-server
--- ```

return {
  cmd = { 'svelteserver', '--stdio' },
  filetypes = { 'svelte' },
  root_dir = function(bufnr, on_dir)
    local root_files = { 'package.json', '.git' }
    local fname = vim.api.nvim_buf_get_name(bufnr)
    -- Svelte LSP only supports file:// schema. https://github.com/sveltejs/language-tools/issues/2777
    if vim.uv.fs_stat(fname) ~= nil then
      on_dir(vim.fs.dirname(vim.fs.find(root_files, { path = fname, upward = true })[1]))
    end
  end,
  on_attach = function(client, bufnr)
    -- Workaround to trigger reloading JS/TS files
    -- See https://github.com/sveltejs/language-tools/issues/2008
    vim.api.nvim_create_autocmd('BufWritePost', {
      pattern = { '*.js', '*.ts' },
      group = vim.api.nvim_create_augroup('svelte_js_ts_file_watch', {}),
      callback = function(ctx)
        -- internal API to sync changes that have not yet been saved to the file system
        client:notify('$/onDidChangeTsOrJsFile', { uri = ctx.match })
      end,
    })
    vim.api.nvim_buf_create_user_command(bufnr, 'LspMigrateToSvelte5', function()
      client:exec_cmd({
        command = 'migrate_to_svelte_5',
        arguments = { vim.uri_from_bufnr(bufnr) },
      })
    end, { desc = 'Migrate Component to Svelte 5 Syntax' })
  end,
}