local lsp_attach = function(client, buf)
	vim.api.nvim_buf_set_option(buf, "formatexpr", "v:lua.vim.lsp.formatexpr()")
	vim.api.nvim_buf_set_option(buf, "omnifunc", "v:lua.vim.lsp.omnifunc")
	vim.api.nvim_buf_set_option(buf, "tagfunc", "v:lua.vim.lsp.tagfunc")

	vim.lsp.inlay_hint.enable(true, nil)

	local bufopts = { noremap = true, silent = true, buffer = buf }
	local wk = require("which-key")

	wk.add({
		{ '<leader>e',  vim.diagnostic.open_float,                   bufopts, desc = "Show diagnostics in buffer" },
		{ '<C-e>',      require("telescope.builtin").diagnostics,    bufopts, desc = "Show diagnostics under cursor" },
		{ '<C-ü>d',     vim.diagnostic.goto_prev,                    bufopts },
		{ '<C-¨>d',     vim.diagnostic.goto_next,                    bufopts },

		{ 'gD',         vim.lsp.buf.declaration,                     bufopts, desc = "Go to declaration" },
		{ 'gd',         vim.lsp.buf.definition,                      bufopts, desc = "Go to definition" },
		{ 'gi',         vim.lsp.buf.implementation,                  bufopts, desc = "Go to implementation" },
		{ '<C-k>',      vim.lsp.buf.signature_help,                  bufopts, desc = "Show signature" },
		{ '<leader>rn', vim.lsp.buf.rename,                          bufopts, desc = "Rename" },
		{ '<leader>ca', vim.lsp.buf.code_action,                     bufopts, desc = "Show code actions" },
		{ 'gr',         require("telescope.builtin").lsp_references, bufopts, desc = "Shwo references" },
	})
end

local mason_path = vim.fn.glob(vim.fn.stdpath "data" .. "/mason/packages/codelldb/extension/")
local codelldb_path = mason_path .. "adapter/codelldb"
local liblldb_path = mason_path .. "lldb/lib/liblldb.so"

if vim.fn.has "mac" == 1 then
	liblldb_path = mason_path .. "lldb/lib/liblldb.dylib"
end

return {
	-- lsp
	{
		'williamboman/mason.nvim',
		config = true
	},
	{
		'williamboman/mason-lspconfig.nvim',
		config = true
	},
	{
		'neovim/nvim-lspconfig',
		config = function()
			local capabilities = require('cmp_nvim_lsp').default_capabilities()
			local lspconfig = require('lspconfig')

			lspconfig.lua_ls.setup {
				capabilities = capabilities,
				root_dir = lspconfig.util.root_pattern('.git'),
				settings = {
					Lua = {
						runtime = {
							-- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
							version = 'LuaJIT',
						},
						diagnostics = {
							-- Get the language server to recognize the `vim` global
							globals = { 'vim' }
						},
						workspace = {
							-- Make the server aware of Neovim runtime files
							library = vim.api.nvim_get_runtime_file("", true),
							checkThirdParty = false,
						},
					}
				},
				on_attach = lsp_attach
			}
			lspconfig.tsserver.setup {
				capabilities = capabilities,
				on_attach = lsp_attach
			}
			lspconfig.gopls.setup {
				capabilities = capabilities,
				on_attach = lsp_attach
			}
			--lspconfig.rust_analyzer.setup {
			--	capabilities = capabilities,
			--	on_attach = lsp_attach
			--}
			lspconfig.bashls.setup {
				capabilities = capabilities,
				on_attach = lsp_attach
			}
			lspconfig.sqlls.setup({
				capabilities = capabilities,
				on_attach = lsp_attach
			})
			lspconfig.html.setup({
				capabilities = capabilities,
				on_attach = lsp_attach
			})
			lspconfig.cssls.setup({
				capabilities = capabilities,
				on_attach = lsp_attach
			})
			lspconfig.tailwindcss.setup({
				capabilities = capabilities,
				on_attach = lsp_attach
			})
			lspconfig.phpactor.setup({
				capabilities = capabilities,
				on_attach = lsp_attach
			})
			lspconfig.julials.setup({
				capabilities = capabilities,
				on_attach = lsp_attach
			})
			capabilities.textDocument.completion.completionItem.snippetSupport = true
			lspconfig.emmet_ls.setup({
				capabilities = capabilities,
				on_attach = lsp_attach
			})
		end
	},
	{
		'mrcjkb/rustaceanvim',
		version = "^4",
		lazy = false,
		ft = { "rust" },
		config = function()
			vim.g.rustaceanvim = {
				server = {
					on_attach = lsp_attach,
					settings = {
						-- rust-analyzer language server configuration
						["rust-analyzer"] = {
							rustfmt = {
								extraArgs = { "+nightly" },
							},
							cargo = {
								allFeatures = true,
								loadOutDirsFromCheck = true,
								runBuildScripts = true,
							},
							-- Add clippy lints for Rust.
							checkOnSave = {
								allFeatures = true,
								command = "clippy",
								extraArgs = { "--no-deps" },
							},
							-- TODO this breaks diagnostics, look into what can be done
							-- procMacro = {
							-- 	enable = true,
							-- 	ignored = {
							-- 		["async-trait"] = { "async_trait" },
							-- 		["napi-derive"] = { "napi" },
							-- 		["async-recursion"] = { "async_recursion" },
							-- 	},
							-- },
						},
					},
				}
			}
		end
	},
	{
		'mfussenegger/nvim-jdtls',
		ft = { "java" },
		config = function()
			local home = os.getenv('HOME')
			local jdtls = require('jdtls')
			local capabilities = require('cmp_nvim_lsp').default_capabilities()
			local root_markers = { 'gradlew', 'mvnw', 'git' }
			local root_dir = require('jdtls.setup').find_root(root_markers)
			local workspace_folder = home .. "/.local/share/eclipse/" .. vim.fn.fnamemodify(root_dir, ":p:h:t")
			local config = {
				flags = {
					debounce_text_changes = 80,
				},
				capabilities = capabilities,
				on_attach = lsp_attach, -- We pass our on_attach keybindings to the configuration map
				root_dir = root_dir, -- Set the root directory to our found root_marker
				-- here you can configure eclipse.jdt.ls specific settings
				-- these are defined by the eclipse.jdt.ls project and will be passed to eclipse when starting.
				-- see https://github.com/eclipse/eclipse.jdt.ls/wiki/running-the-java-ls-server-from-the-command-line#initialize-request
				-- for a list of options
				settings = {
					java = {
						format = {
							settings = {
								-- use google java style guidelines for formatting
								-- to use, make sure to download the file from https://github.com/google/styleguide/blob/gh-pages/eclipse-java-google-style.xml
								-- and place it in the ~/.local/share/eclipse directory
								-- url = "/.local/share/eclipse/eclipse-java-google-style.xml",
								-- profile = "googlestyle",
							},
						},
						signaturehelp = { enabled = true },
						contentprovider = { preferred = 'fernflower' }, -- use fernflower to decompile library code
						-- specify any completion options
						completion = {
							favoritestaticmembers = {
								-- "org.hamcrest.matcherassert.assertthat",
								-- "org.hamcrest.matchers.*",
								-- "org.hamcrest.corematchers.*",
								-- "org.junit.jupiter.api.assertions.*",
								-- "java.util.objects.requirenonnull",
								-- "java.util.objects.requirenonnullelse",
								-- "org.mockito.mockito.*"
							},
							filteredtypes = {
								-- "com.sun.*",
								-- "io.micrometer.shaded.*",
								-- "java.awt.*",
								-- "jdk.*", "sun.*",
							},
						},
						-- specify any options for organizing imports
						sources = {
							organizeimports = {
								starthreshold = 9999,
								staticstarthreshold = 9999,
							},
						},
						-- how code generation should act
						codegeneration = {
							tostring = {
								template = "${object.classname}{${member.name()}=${member.value}, ${othermembers}}"
							},
							hashcodeequals = {
								usejava7objects = true,
							},
							useblocks = true,
						},
						-- if you are developing in projects with different java versions, you need
						-- to tell eclipse.jdt.ls to use the location of the jdk for your java version
						-- see https://github.com/eclipse/eclipse.jdt.ls/wiki/running-the-java-ls-server-from-the-command-line#initialize-request
						-- and search for `interface runtimeoption`
						-- the `name` is not arbitrary, but must match one of the elements from `enum executionenvironment` in the link above
						configuration = {
							runtimes = {
								{
									name = "JavaSE-17",
									path = home .. "/.local/share/asdf/installs/java/oracle-17.0.11/",
								},
								{
									name = "JavaSE-21",
									path = home .. "/.local/share/asdf/installs/java/oracle-21.0.2/",
								},
								{
									name = "JavaSE-1.8",
									path = home .. "/.local/share/asdf/installs/java/adoptopenjdk-8.0.412+8/"
								},
							}
						}
					}
				},
				-- cmd is the command that starts the language server. whatever is placed
				-- here is what is passed to the command line to execute jdtls.
				-- note that eclipse.jdt.ls must be started with a java version of 17 or higher
				-- see: https://github.com/eclipse/eclipse.jdt.ls#running-from-the-command-line
				-- for the full list of options
				cmd = {
					home .. "/.local/share/asdf/installs/java/oracle-21.0.2/bin/java",
					'-Declipse.application=org.eclipse.jdt.ls.core.id1',
					'-Dosgi.bundles.defaultstartlevel=4',
					'-Declipse.product=org.eclipse.jdt.ls.core.product',
					'-Dlog.protocol=true',
					'-Dlog.level=all',
					'-Xmx4G',
					'--add-modules=ALL-SYSTEM',
					'--add-opens', 'java.base/java.util=ALL-UNNAMED',
					'--add-opens', 'java.base/java.lang=ALL-UNNAMED',
					-- if you use lombok, download the lombok jar and place it in ~/.local/share/eclipse
					'-javaagent:' .. home .. '/.local/share/nvim/mason/packages/jdtls/lombok.jar',

					-- the jar file is located where jdtls was installed. this will need to be updated
					-- to the location where you installed jdtls
					'-jar', vim.fn.glob(
					home ..
					'/.local/share/nvim/mason/packages/jdtls/plugins/org.eclipse.equinox.launcher_*.jar'),

					-- the configuration for jdtls is also placed where jdtls was installed. this will
					-- need to be updated depending on your environment
					'-configuration', home .. '/.local/share/nvim/mason/packages/jdtls/config_linux',

					-- use the workspace_folder defined above to store data for this project
					'-data', workspace_folder,
				},
			}

			jdtls.start_or_attach(config)
		end
	},
	{ 'onsails/lspkind-nvim' }, -- pictograms replace (?) with lspsaga
	{
		'j-hui/fidget.nvim',
		config = true
	}, -- show lsp status
	-- completion
	{
		'hrsh7th/nvim-cmp',
		config = function()
			local cmp = require('cmp')
			local lspkind = require('lspkind')

			vim.opt.shortmess:append 'c'

			cmp.setup({
				snippet = {
					expand = function(args)
						require('luasnip').lsp_expand(args.body)
					end,
				},
				mapping = cmp.mapping.preset.insert({
					["<C-n>"] = cmp.mapping.select_next_item { behavior = cmp.SelectBehavior.Insert },
					["<C-p>"] = cmp.mapping.select_prev_item { behavior = cmp.SelectBehavior.Insert },
					['<C-b>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), { 'i', 'c' }),
					['<C-f>'] = cmp.mapping(cmp.mapping.scroll_docs(4), { 'i', 'c' }),
					['<C-s>'] = cmp.mapping(cmp.mapping.complete(), { 'i', 'c' }),
					['<C-y>'] = cmp.mapping.confirm({
						behavior = cmp.ConfirmBehavior.Insert,
						select = true
					}),
					['<C-e>'] = cmp.mapping({
						i = cmp.mapping.abort(),
						c = cmp.mapping.close(),
					}),
					['<CR>'] = cmp.mapping.confirm({ select = true }),
				}),
				sources = cmp.config.sources({
					{ name = 'nvim_lua' },
					{ name = 'nvim_lsp' },
					{ name = 'path' },
					{ name = 'luasnip' },
					{ name = 'nvim_lsp_signature_help' },
				}, {
					{ name = 'buffer', keyword_length = 5 },
				}),
				formatting = {
					format = lspkind.cmp_format {
						with_text = true,
						menu = {
							buffer = "[buf]",
							nvim_lsp = "[LSP]",
							nvim_lua = "[api]",
							path = "[path]",
							luasnip = "[snip]",
						}
					}
				}
			})

			-- Use buffer source for `/` (basically search words in buffer)
			cmp.setup.cmdline('/', {
				sources = {
					{ name = 'buffer' }
				}
			})

			-- Use cmdline & path source for ':'
			cmp.setup.cmdline(':', {
				sources = cmp.config.sources({
					{ name = 'path' }
				}, {
					{ name = 'cmdline' }
				})
			})
		end,
		event = 'InsertEnter',
		dependencies = {
			'hrsh7th/cmp-nvim-lsp',
			'hrsh7th/cmp-nvim-lsp-signature-help',
			'hrsh7th/cmp-buffer',
			'hrsh7th/cmp-path',
			'hrsh7th/cmp-nvim-lua',
			'hrsh7th/cmp-cmdline',
			'saadparwaiz1/cmp_luasnip',
		}
	},
	{
		'L3MON4D3/LuaSnip',
		version = "v2.*",
		build = "make install_jsregexp",
		config = function()
			require("luasnip.loaders.from_lua").load({ paths = "~/.config/nvim/snippets/" })
		end
	},
	{
		'windwp/nvim-autopairs',
		config = true
	},
	{
		"folke/trouble.nvim",
		dependencies = { "nvim-tree/nvim-web-devicons" },
		opts = {
			-- your configuration comes here
			-- or leave it empty to use the default settings
			-- refer to the configuration section below
		},
	},
}