--
-- config for lsp server
--
local null_ls = require("null-ls")
local diagnostics = null_ls.builtins.diagnostics
local formatting = null_ls.builtins.formatting

local M = {}

vim.g.coq_settings = { auto_start = "shut-up" }

local sources = {
	lsp_servers = { "rust_analyzer", "pyright", "bashls" },
	null_ls = {
		diagnostics.alex,
		diagnostics.codespell,
		diagnostics.flake8,
		formatting.black,
		formatting.codespell,
		formatting.prettier,
		formatting.rustfmt,
		formatting.stylua,
	},
	mason = {
		"alex",
		"black",
		"codespell",
		"flake8",
		"prettier",
		"stylua",
	},
}

-- configure lsp servers
local all_config = {}
local servers = {}
for _, server in ipairs(sources.lsp_servers) do
	servers[server] = all_config
end

servers["sumneko_lua"] = {
	settings = {
		Lua = {
			runtime = {
				version = "LuaJIT",
			},
			diagnostics = {
				globals = { "vim" },
			},
			workspace = {
				library = vim.api.nvim_get_runtime_file("", true),
			},
			telemetry = {
				enable = false,
			},
		},
	},
}

M.lsp_servers = servers

-- only use null-ls for formatting

--- for neovim >= 8
--- local lsp_formatting = function(bufnr)
--- 	vim.lsp.buf.format({
--- 		filter = function(client)
--- 			return client.name == "null-ls"
--- 		end,
--- 		bufnr = bufnr,
--- 	})
--- end

local augroup = vim.api.nvim_create_augroup("LspFormatting", {})
local on_attach = function(client, bufnr)
	if client.supports_method("textDocument/formatting") then
		vim.api.nvim_clear_autocmds({ group = augroup, buffer = bufnr })
		vim.api.nvim_create_autocmd("BufWritePre", {
			group = augroup,
			buffer = bufnr,
			callback = function()
				local params = require("vim.lsp.util").make_formatting_params({})
				client.request("textDocument/formatting", params, nil, bufnr)
				-- lsp_formatting(bufnr) -- neovim >= 8
			end,
		})
	end
end

M.null_ls = {
	on_attach = on_attach,
	sources = sources.null_ls,
}

M.mason_tool_installer = {
	ensure_installed = sources.mason,
}

M.mason_lsp = {
	automatic_installation = true,
}

-- etc plugins
M.bufferline = {
	options = {
		numbers = "ordinal",
		diagnostics = "nvim_lsp",
		always_show_bufferline = false,
	},
}
M.tree = {}
M.treesitter = {
	auto_install = true,
}
M.trouble = {}

return M