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local lspconfig = require "lspconfig"

local function on_attach(client, bufnr)
	local opts = { noremap = true, silent = true, buffer = bufnr }

	local telescope_builtin = require "telescope.builtin"

	local function desc(tbl1, description)
		return vim.tbl_extend("force", tbl1, { desc = description })
	end

	vim.keymap.set("n", "gD", vim.lsp.buf.declaration, desc(opts, "LSP declaration"))
	vim.keymap.set("n", "gd", telescope_builtin.lsp_definitions, desc(opts, "LSP Definitions"))
	vim.keymap.set("n", "K", vim.lsp.buf.hover, desc(opts, "LSP Hover"))

	vim.keymap.set("n", "gr", telescope_builtin.lsp_references, desc(opts, "LSP References"))

	vim.keymap.set("n", "<leader>sa", vim.lsp.buf.code_action, desc(opts, "LSP Code Actions"))
	vim.keymap.set("n", "<leader>se", vim.diagnostic.open_float, desc(opts, "Local Diagnostics"))
	vim.keymap.set("n", "<leader>sE", telescope_builtin.diagnostics, desc(opts, "Global Diagnostics"))
	vim.keymap.set("n", "<leader>sl", vim.diagnostic.setloclist, desc(opts, "Diagnostics set LocList"))
	vim.keymap.set("n", "<leader>sq", vim.diagnostic.setqflist, desc(opts, "Diagnostics set QFList"))
	vim.keymap.set("n", "<leader>sr", vim.lsp.buf.rename, desc(opts, "LSP Rename"))
	vim.keymap.set("n", "<leader>ss", telescope_builtin.lsp_document_symbols, desc(opts, "LSP Document Symbols"))
	vim.keymap.set("n", "<leader>sS", telescope_builtin.lsp_workspace_symbols, desc(opts, "LSP Workspace Symbols"))

	vim.keymap.set("n", "[d", vim.diagnostic.goto_prev, desc(opts, "Goto Next Diagnostic"))
	vim.keymap.set("n", "]d", vim.diagnostic.goto_next, desc(opts, "Goto Prev Diagnostic"))

	-- Capability specific

	if client.resolved_capabilities.document_formatting then
		vim.keymap.set("n", "<leader>sf", vim.lsp.buf.formatting, desc(opts, "Format buffer"))
	end
	if client.resolved_capabilities.document_range_formatting then
		vim.keymap.set("v", "<leader>sf", vim.lsp.buf.range_formatting, desc(opts, "Format Range"))
	end

	-- Rust specific
	vim.keymap.set("n", "<leader>sh", "<cmd>RustToggleInlayHints<CR>", opts)

	require("lsp_signature").on_attach {
		hint_prefix = "param: ",
	}
end

local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities.textDocument.completion.completionItem.snippetSupport = true
capabilities.textDocument.completion.completionItem.resolveSupport = {
	properties = {
		"documentation",
		"detail",
		"additionalTextEdits",
	},
}
capabilities = require("cmp_nvim_lsp").update_capabilities(capabilities)

require("rust-tools").setup {
	server = {
		cmd = { vim.g.rust_analyzer_path },
		settings = {
			["rust-analyzer"] = {
				checkOnSave = {
					command = "clippy",
				},
				experimental = {
					procAttrMacros = true,
				},
			},
		},
		on_attach = on_attach,
	},
}

require("nlua.lsp.nvim").setup(lspconfig, {
	cmd = {
		string.format("%s/bin/lua-language-server", vim.g.sumneko_lua_base_path),
		"-E",
		string.format("%s/share/lua-language-server/main.lua", vim.g.sumneko_lua_base_path),
	},
	on_attach = on_attach,
})