nvim/lua/lsp/init.lua

--[[


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              __             _             _
             / _|___     ___| |_ __ _  ___| | __
            | ||_  /____/ __| __/ _` |/ __| |/ /
            |  _/ /_____\__ \ || (_| | (__|   <
            |_|/___|    |___/\__\__,_|\___|_|\_\

                Neovim v0.12 configuration
                  (C) Frank Zechert 2026
]]
vim.pack.add({
	{ src = "https://github.com/neovim/nvim-lspconfig" },
})

require("lsp.lua_ls")

local function run_healthcheck(section)
	local before = {}
	for _, b in ipairs(vim.api.nvim_list_bufs()) do
		before[b] = true
	end

	vim.cmd("silent checkhealth " .. section)

	local after = vim.api.nvim_list_bufs()
	local health_buf = nil

	for _, b in ipairs(after) do
		if not before[b] then
			health_buf = b
			break
		end
	end

	if not health_buf then
		return { "Could not capture :checkhealth vim.lsp output" }
	end

	-- Read lines
	local lines = vim.api.nvim_buf_get_lines(health_buf, 0, -1, false)

	-- Close the health window
	for _, win in ipairs(vim.api.nvim_list_wins()) do
		if vim.api.nvim_win_get_buf(win) == health_buf then
			vim.api.nvim_win_close(win, true)
		end
	end

	return lines
end

local function get_all_treesitter_languages()
	local bufnr = 0
	local ok, parser = pcall(vim.treesitter.get_parser, bufnr)
	if not ok or not parser then
		return {}
	end

	local langs = { parser:lang() }
	for _, child in ipairs(parser:children()) do
		table.insert(langs, child:lang())
	end
	return langs
end

local function get_treesitter_status()
	local bufnr = 0
	local ok, parser = pcall(vim.treesitter.get_parser, bufnr)

	if not ok or not parser then
		return {
			"Treesitter:",
			"  active: no",
			"  parsers: none",
		}
	end

	local langs = get_all_treesitter_languages()
	return {
		"Treesitter:",
		"  active: yes",
		"  parsers: " .. table.concat(langs, ", "),
	}
end


local function show_lsp_details()
	local popup_buffer = vim.api.nvim_create_buf(false, true)
	local lsp_clients = vim.lsp.get_clients({ bufnr = 0 })
	local lines = {}

	-- Treesitter status
	table.insert(lines, "Treesitter Status")
	table.insert(lines, "=================")
	local ts = get_treesitter_status()
	for _, l in ipairs(ts) do
		table.insert(lines, l)
	end

	table.insert(lines, "")
	if #lsp_clients == 0 then
		table.insert(lines, "No LSP clients attached.")
	else
		table.insert(lines, "Active LSP Clients:")
		table.insert(lines, "===================")
		for _, client in ipairs(lsp_clients) do
			table.insert(lines, "")
			table.insert(lines, "• " .. client.name)

			-- Root folders
			local roots = {}
			if client.workspace_folders then
				for _, workspace_folder in ipairs(client.workspace_folders) do
					table.insert(roots, workspace_folder.name or workspace_folder.uri or "")
				end
			end

			if #roots > 0 then
				table.insert(lines, "  Roots:")
				for _, root in ipairs(roots) do
					table.insert(lines, "  - " ..root)
				end
			else
				table.insert(lines, "  Roots: none")
			end

			-- Capabilities
			table.insert(lines, "  Capabilities:")
			for capability, _ in pairs(client.server_capabilities or {}) do
				table.insert(lines, "  - " .. capability)
			end
		end
	end

	table.insert(lines, "")
	table.insert(lines, "Health Check (vim.lsp):")
	table.insert(lines, "=======================")
	local health_lines = run_healthcheck("vim.lsp")
	for _, l in ipairs(health_lines) do
		table.insert(lines, "  " .. l)
	end

	table.insert(lines, "")
	table.insert(lines, "Health Check (vim.treesitter):")
	table.insert(lines, "=======================")
	local health_lines = run_healthcheck("vim.treesitter")
	for _, l in ipairs(health_lines) do
		table.insert(lines, "  " .. l)
	end


	vim.api.nvim_buf_set_lines(popup_buffer, 0, -1, false, lines)
	vim.api.nvim_set_option_value("modifiable", false, { buf = popup_buffer })
	vim.api.nvim_set_option_value("readonly", true, { buf = popup_buffer })
	local width = math.floor(vim.o.columns * 0.6)
	local height = math.floor(vim.o.lines * 0.6)
	local row = math.floor((vim.o.lines - height) / 2)
	local col = math.floor((vim.o.columns - width) / 2)

	local window = vim.api.nvim_open_win(popup_buffer, true, {
		relative = "editor",
		style = "minimal",
		border = vim.g.ui.popupborder,
		row = row,
		col = col,
		width = width,
		height = height,
	})

	vim.keymap.set("n", "q", function()
		if vim.api.nvim_win_is_valid(window) then
			vim.api.nvim_win_close(window, true)
		end
	end, { buffer = popup_buffer, nowait = true, desc = "Close Window" })
end

vim.keymap.set("n", "<leader>li", show_lsp_details, {
  desc = "Show detailed LSP info in a float"
})