---@brief
---
--- https://github.com/stylelint/vscode-stylelint/tree/main/packages/language-server
---
--- `stylelint-language-server` can be installed via npm `npm install -g @stylelint/language-server`.
--- ```

local util = require 'lspconfig.util'
local lsp = vim.lsp

local stylelint_config_files = {
  '.stylelintrc',
  '.stylelintrc.mjs',
  '.stylelintrc.cjs',
  '.stylelintrc.js',
  '.stylelintrc.json',
  '.stylelintrc.yaml',
  '.stylelintrc.yml',
  'stylelint.config.mjs',
  'stylelint.config.cjs',
  'stylelint.config.js',
}

---@type vim.lsp.Config
return {
  cmd = { 'stylelint-language-server', '--stdio' },
  filetypes = {
    'astro',
    'css',
    'html',
    'less',
    'scss',
    'vue',
  },
  root_dir = function(bufnr, on_dir)
    -- The project root is where the LSP can be started from
    -- As stated in the documentation above, this LSP supports monorepos and simple projects.
    -- We select then from the project root, which is identified by the presence of a package
    -- manager lock file.
    local root_markers = { 'package-lock.json', 'yarn.lock', 'pnpm-lock.yaml', 'bun.lockb', 'bun.lock' }
    -- Give the root markers equal priority by wrapping them in a table
    root_markers = vim.fn.has('nvim-0.11.3') == 1 and { root_markers, { '.git' } }
      or vim.list_extend(root_markers, { '.git' })

    -- exclude deno
    if vim.fs.root(bufnr, { 'deno.json', 'deno.jsonc', 'deno.lock' }) then
      return
    end

    -- We fallback to the current working directory if no project root is found
    local project_root = vim.fs.root(bufnr, root_markers) or vim.fn.getcwd()

    -- We know that the buffer is using Stylelint if it has a config file
    -- in its directory tree.
    --
    -- Stylelint support package.json files as config files.
    local filename = vim.api.nvim_buf_get_name(bufnr)
    local stylelint_config_files_with_package_json =
      util.insert_package_json(stylelint_config_files, 'stylelintConfig', filename)
    local is_buffer_using_stylelint = vim.fs.find(stylelint_config_files_with_package_json, {
      path = filename,
      type = 'file',
      limit = 1,
      upward = true,
      stop = vim.fs.dirname(project_root),
    })[1]
    if not is_buffer_using_stylelint then
      return
    end

    on_dir(project_root)
  end,
  on_attach = function(client, bufnr)
    vim.api.nvim_buf_create_user_command(bufnr, 'LspStylelintFixAll', function()
      client:request_sync('workspace/executeCommand', {
        command = 'stylelint.applyAutoFix',
        arguments = {
          {
            uri = vim.uri_from_bufnr(bufnr),
            version = lsp.util.buf_versions[bufnr],
          },
        },
      }, nil, bufnr)
    end, {})
  end,
  -- Refer to https://github.com/stylelint/vscode-stylelint?tab=readme-ov-file#extension-settings for documentation.
  ---@type lspconfig.settings.stylelint_language_server
  settings = {
    stylelint = {
      validate = { 'css', 'postcss' },
      snippet = { 'css', 'postcss' },
    },
  },
}