local function formatting_filter(c)
  local bl = {
    'phpactor',
  }
  for _, name in ipairs(bl) do
    if c.name == name then
      return false;
    end
  end
  return true
end

local function navic_attach(client, bufnr)
  require('nvim-navic').attach(client, bufnr)
  vim.wo.winbar = "%{%v:lua.require'nvim-navic'.get_location()%}"
  vim.api.nvim_create_autocmd('LspDetach', {
    pattern = vim.api.nvim_buf_get_name(bufnr),
    once = true,
    callback = function()
      vim.cmd.setlocal('winbar<')
    end,
  })
end

local function on_attach(args) -- {{{
  -- require "lsp_signature".on_attach()
  -- require'completion'.on_attach()
  local bufnr = args.buf


  local client = vim.lsp.get_client_by_id(args.data.client_id)

  if (client.server_capabilities.documentSymbolProvider) then
    navic_attach(client, bufnr)
  end

  -- Mappings.
  local function mkOpts(desc)
    return { noremap = true, silent = true, buffer = args.buf, desc = desc }
  end

  -- null-ls has mostly no hover and therefore trashes manpages for shell
  if client.supports_method('textDocument/hover') and client.name ~= 'null-ls' then
    vim.keymap.set('n', 'K', vim.lsp.buf.hover, mkOpts('LSP hover'))
  end

  if client.server_capabilities.signatureHelpProvider then
    vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, mkOpts('LSP signature help'))
    vim.keymap.set('i', '<C-k>', vim.lsp.buf.signature_help, mkOpts('LSP signature help'))
  end

  if client.server_capabilities.codeLensProvider then
    vim.api.nvim_create_autocmd(
      { 'BufEnter', 'CursorHold', 'InsertLeave' }, {
      callback = vim.lsp.codelens.refresh,
      buffer = bufnr,
    })
  end
  vim.keymap.set('n', '<leader>cl', vim.lsp.codelens.run, mkOpts('LSP Run code lens'))
  vim.keymap.set('n', '<leader>ci', vim.lsp.buf.implementation, mkOpts('LSP implementation'))
  vim.keymap.set('n', '<leader>cd', vim.lsp.buf.type_definition, mkOpts('LSP type definition'))
  vim.keymap.set('n', '<leader>cD', vim.lsp.buf.declaration, mkOpts('LSP declaration'))
  vim.keymap.set('n', '<leader>cR', vim.lsp.buf.rename, mkOpts('LSP rename'))
  vim.keymap.set('n', '<leader>ca', vim.lsp.buf.code_action, mkOpts('LSP Code action'))
  vim.keymap.set('v', '<leader>ca', vim.lsp.buf.code_action, mkOpts('LSP Code action'))
  vim.keymap.set('n', '<leader>cci', vim.lsp.buf.incoming_calls, mkOpts('LSP incoming calls'))
  vim.keymap.set('n', '<leader>cco', vim.lsp.buf.outgoing_calls, mkOpts('LSP outgoing calls'))
  -- vim.keymap.set('n', 'gr', vim.lsp.buf.references, mkOpts('LSP references'))
  vim.keymap.set('n', '<leader>cr', '<Cmd>Trouble lsp_references<CR>', mkOpts('LSP references'))
  vim.keymap.set(
    { 'v', 'n' }, '<leader>F', function()
    vim.lsp.buf.format({ async = true, filter = formatting_filter })
  end,
    mkOpts('Lsp Format')
  )

  if (formatting_filter(client)) then
    vim.api.nvim_buf_set_option(bufnr, 'formatexpr', 'v:lua.vim.lsp.formatexpr(#{timeout_ms:250})')
  end

  if client.name == 'omnisharp' then
    client.server_capabilities.semanticTokensProvider.legend = {
      tokenModifiers = { 'static' },
      tokenTypes = {
        'comment', --  "comment",
        'comment', --  "excluded_code",
        'identifier', --  "identifier",
        'keyword', --  "keyword",
        'keyword', --  "keyword_control",
        'number', --  "number",
        'operator', --  "operator",
        'operator', --  "operator_overloaded",
        'preproc', --  "preprocessor_keyword",
        'string', --  "string",
        'whitespace', --  "whitespace",
        'text', --  "text",
        'static', --  "static_symbol",
        'preproc', --  "preprocessor_text",
        'punctuation', --  "punctuation",
        'string.escape', --  "string_verbatim",
        'character.special', --  "string_escape_character",
        'class', --  "class_name",
        'type', --  "delegate_name",
        'enum', --  "enum_name",
        'interface', --  "interface_name",
        'namespace', --  "module_name",
        'struct', --  "struct_name",
        'typeParameter', --  "type_parameter_name",
        'field', --  "field_name",
        'enumMember', --  "enum_member_name",
        'constant', --  "constant_name",
        'variable', --  "local_name",
        'parameter', --  "parameter_name",
        'method', --  "method_name",
        'method', --  "extension_method_name",
        'property', --  "property_name",
        'event', --  "event_name",
        'namespace', --  "namespace_name",
        'label', --  "label_name",
        'text.literal', --  "xml_doc_comment_attribute_name",
        'text.literal', --  "xml_doc_comment_attribute_quotes",
        'text.literal', --  "xml_doc_comment_attribute_value",
        'text.literal', --  "xml_doc_comment_cdata_section",
        'text.literal', --  "xml_doc_comment_comment",
        'text.literal', --  "xml_doc_comment_delimiter",
        'text.literal', --  "xml_doc_comment_entity_reference",
        'text.literal', --  "xml_doc_comment_name",
        'text.literal', --  "xml_doc_comment_processing_instruction",
        'text.literal', --  "xml_doc_comment_text",
        'text.literal', --  "xml_literal_attribute_name",
        'text.literal', --  "xml_literal_attribute_quotes",
        'text.literal', --  "xml_literal_attribute_value",
        'text.literal', --  "xml_literal_cdata_section",
        'text.literal', --  "xml_literal_comment",
        'text.literal', --  "xml_literal_delimiter",
        'text.literal', --  "xml_literal_embedded_expression",
        'text.literal', --  "xml_literal_entity_reference",
        'text.literal', --  "xml_literal_name",
        'text.literal', --  "xml_literal_processing_instruction",
        'text.literal', --  "xml_literal_text",
        'regexp', --  "regex_comment",
        'regexp', --  "regex_character_class",
        'regexp', --  "regex_anchor",
        'regexp', --  "regex_quantifier",
        'regexp', --  "regex_grouping",
        'regexp', --  "regex_alternation",
        'regexp', --  "regex_text",
        'regexp', --  "regex_self_escaped_character",
        'regexp' --  "regex_other_escape",
      },
    }
  end
end -- }}}

local function config()
  require('neodev').setup({})

  vim.api.nvim_create_autocmd('LspAttach', {
    callback = on_attach,
  })

  local nvim_lsp = require('lspconfig')

  -- Use a loop to conveniently both setup defined servers
  -- and map buffer local keybindings when the language server attaches
  local servers = {
    powershell_es = { bundle_path = '/home/vladimir/devel/PowerShellEditorServices/module' },
    gopls = {},
    clangd = {},
    zls = {},
    hls = {},
    tsserver = {},
    perlls = {},
    rust_analyzer = {},
    cssls = {},
    html = {},
    omnisharp = { -- {{{
      handlers = {
        ['textDocument/definition'] = require('omnisharp_extended').handler,
        -- ['textDocument/publishDiagnostics'] = vim.lsp.with(
        --   vim.lsp.diagnostic.on_publish_diagnostics, {
        --   virtual_text = {
        --     severity = { vim.diagnostic.severity.WARN, vim.diagnostic.severity.ERROR },
        --   },
        -- }
        -- ),
      },
      cmd = { '/usr/bin/omnisharp' },
      enable_editorconfig_support = true,
      enable_ms_build_load_projects_on_demand = false,
      enable_roslyn_analyzers = true,
      organize_imports_on_format = true,
      enable_import_completion = true,
      sdk_include_prereleases = true,
      analyze_open_documents_only = true,
    }, -- }}}
    lua_ls = { -- {{{
      settings = {
        Lua = {
          workleader = {
            checkThirdParty = false,
          },
          completion = {
            callSnippet = 'Replace',
          },
        },
      },
    }, -- }}}
    phpactor = { -- {{{
      handlers = {
        ['textDocument/publishDiagnostics'] = vim.lsp.with(
          vim.lsp.diagnostic.on_publish_diagnostics, {
          virtual_text = {
            severity = vim.diagnostic.severity.ERROR,
          },
        }
        ),
      },
      root_dir = function(startpath)
        local u = require('lspconfig.util')
        return u.search_ancestors(startpath, function(path)
          return not string.find(path, '/vendor/') and (
            u.path.exists(u.path.join(path, 'composer.json'))
            or u.path.exists(u.path.join(path, 'sharedLibs'))
            or u.path.exists(u.path.join(path, '.git'))
            )
        end)
      end,
    }, -- }}}
    yamlls = { -- {{{
      settings = {
        validate = { enable = true },
        json = {
          schemas = require('schemastore').json.schemas {},
        },
      },
    }, -- }}}
    jsonls = { -- {{{
      settings = {
        validate = { enable = true },
        json = {
          schemas = require('schemastore').json.schemas {
            replace = {
              ['openapi.json'] = {
                description = 'A JSON schema for Open API documentation files',
                fileMatch = { 'openapi.json', 'openapi.yml', 'openapi.yaml', 'openapi/*.json' },
                name = 'openapi.json',
                url = 'https://raw.githubusercontent.com/OAI/OpenAPI-Specification/main/schemas/v3.0/schema.json',
                versions = {
                  ['3.1'] = 'https://raw.githubusercontent.com/OAI/OpenAPI-Specification/main/schemas/v3.1/schema.json',
                  ['3.0'] = 'https://raw.githubusercontent.com/OAI/OpenAPI-Specification/main/schemas/v3.0/schema.json',
                },
              },
            },
          },
        },
      },
    }, -- }}}
  }

  local capabilities = require('cmp_nvim_lsp').default_capabilities()
  for name, conf in pairs(servers) do
    conf.capabilities = capabilities
    nvim_lsp[name].setup(conf)
  end
end

return {
  { 'neovim/nvim-lspconfig',
    dependencies = {
      { 'j-hui/fidget.nvim',        config = true },
      { 'ray-x/lsp_signature.nvim', opts = { hint_prefix = '⥊ ', floating_window = false, hint_scheme = 'Identifier' } },
    },
    keys = {
      { '<leader>li', '<Cmd>LspInfo<CR>', desc = 'Lsp info' },
      { '<leader>ll', '<Cmd>LspLog<CR>',  desc = 'Lsp log' },
    },
    event = 'BufRead',
    config = config,
  },
  { 'SmiteshP/nvim-navic',               lazy = true },
  { 'Hoffs/omnisharp-extended-lsp.nvim', lazy = true },
  { 'b0o/schemastore.nvim',              lazy = true },
  { 'folke/neodev.nvim',                 lazy = true },
}