local function augroup(name)
	return vim.api.nvim_create_augroup("nvim_" .. name, { clear = true })
end

-- smart column only when needed
local smart_column_group = vim.api.nvim_create_augroup('SmartColumn', { clear = true })
vim.api.nvim_create_autocmd({ 'CursorMoved', 'CursorMovedI', 'BufEnter' }, {
    group = smart_column_group,
    callback = function()
        local limit = 120
        local disabled_fts = { 'help', 'text', 'markdown', 'oil', 'snacks_dashboard', 'dashboard' }

        if vim.tbl_contains(disabled_fts, vim.bo.filetype) then
            vim.wo.colorcolumn = ''
            return
        end

        local curr_line = vim.api.nvim_get_current_line()
        if vim.fn.strdisplaywidth(curr_line) > limit then
            vim.wo.colorcolumn = tostring(limit)
        else
            vim.wo.colorcolumn = ''
        end
    end,
})

-- Secure .env Masking
local env_ns = vim.api.nvim_create_namespace("secure_env")

local function toggle_env(buf)
	local is_mod = vim.bo[buf].modified
	vim.bo[buf].modifiable = true
	if vim.b[buf].env_cache then
		vim.api.nvim_buf_set_lines(buf, 0, -1, false, vim.b[buf].env_cache)
		vim.api.nvim_buf_clear_namespace(buf, env_ns, 0, -1)
		vim.b[buf].env_cache = nil
	else
		local lines = vim.api.nvim_buf_get_lines(buf, 0, -1, false)
		vim.b[buf].env_cache = vim.deepcopy(lines)
		for i, l in ipairs(lines) do
			if not l:match("^%s*#") then
				lines[i] = l:gsub("(=%s*[\"']?)(.-)([\"']?%s*)$", function(p, v, s)
					return #v > 0 and (p .. string.rep("*", math.max(#v, 8)) .. s) or l
				end)
			end
		end
		vim.api.nvim_buf_set_lines(buf, 0, -1, false, lines)
		vim.api.nvim_buf_set_extmark(buf, env_ns, 0, 0, { virt_text = {{"  [Values Hidden]", "WarningMsg"}}, virt_text_pos = "eol" })
		vim.bo[buf].modifiable = false
	end
	vim.bo[buf].modified = is_mod
end

vim.api.nvim_create_autocmd({ "BufReadPost", "BufNewFile", "BufWriteCmd" }, {
	group = augroup("secure_env"),
	pattern = { ".env", ".env.*", "*.env" },
	callback = function(args)
		local ev, buf = args.event, args.buf
		if ev == "BufReadPost" or ev == "BufNewFile" then
			vim.keymap.set("n", "<leader>et", function() toggle_env(buf) end, { buffer = buf, desc = "Toggle env" })
			if not vim.b[buf].env_cache then toggle_env(buf) end
		elseif ev == "BufWriteCmd" then
			local file = vim.api.nvim_buf_get_name(buf)
			if file ~= "" then
				local lines = vim.b[buf].env_cache or vim.api.nvim_buf_get_lines(buf, 0, -1, false)
				if pcall(vim.fn.writefile, lines, file) then
					vim.bo[buf].modified = false
				else
					vim.notify("Write failed!", vim.log.levels.ERROR)
				end
			end
		end
	end,
})

-- Strip trailing spaces before write
vim.api.nvim_create_autocmd("BufWritePre", {
	group = augroup("strip_space"),
	pattern = "*",
	callback = function()
		local save = vim.fn.winsaveview()
		vim.cmd([[keeppatterns %s/\s\+$//e]])
		vim.fn.winrestview(save)
	end,
})


-- Resize splits if window got resized
vim.api.nvim_create_autocmd("VimResized", {
	group = augroup("resize_splits"),
	callback = function()
		vim.cmd("tabdo wincmd =")
	end,
})


-- Close specific filetypes with <q>
vim.api.nvim_create_autocmd("FileType", {
	group = augroup("close_with_q"),
	pattern = {
		"help", "lspinfo", "man", "notify", "qf", "query", "spectre_panel",
		"startuptime", "tsplayground", "neotest-output", "checkhealth",
	},
	callback = function(event)
		vim.bo[event.buf].buflisted = false
		vim.keymap.set("n", "q", "<cmd>close<cr>", { buffer = event.buf, silent = true })
	end,
})

-- Auto-create directories on save
vim.api.nvim_create_autocmd("BufWritePre", {
	group = augroup("auto_create_dir"),
	callback = function(event)
		if event.match:match("^%w%w+://") then
			return
		end
		local file = vim.loop.fs_realpath(event.match) or event.match
		vim.fn.mkdir(vim.fn.fnamemodify(file, ":p:h"), "p")
	end,
})

-- LSP Attach Features
vim.api.nvim_create_autocmd("LspAttach", {
	group = augroup("lsp_attach_autocmds"),
	callback = function(args)
		local client = vim.lsp.get_client_by_id(args.data.client_id)
		
		-- Document Highlight
		if client and client:supports_method("textDocument/documentHighlight") then
			vim.api.nvim_create_autocmd({ "CursorHold" }, {
				buffer = args.buf,
				callback = vim.lsp.buf.document_highlight,
			})
			vim.api.nvim_create_autocmd({ "CursorMoved", "CursorMovedI" }, {
				buffer = args.buf,
				callback = vim.lsp.buf.clear_references,
			})
		end

		-- Inlay Hints
		if client and client.server_capabilities.inlayHintProvider and vim.lsp.inlay_hint then
			vim.lsp.inlay_hint.enable(true, { bufnr = args.buf })
		end
	end,
})

-- Wrap and spellcheck in text filetypes
vim.api.nvim_create_autocmd("FileType", {
	group = augroup("wrap_spell"),
	pattern = { "gitcommit", "markdown", "text" },
	callback = function()
		vim.opt_local.wrap = true
		vim.opt_local.spell = true
	end,
})

-- Disable auto-commenting on new lines
vim.api.nvim_create_autocmd("FileType", {
	group = augroup("no_auto_comment"),
	callback = function()
		vim.opt_local.formatoptions:remove({ "c", "r", "o" })
	end,
})


-- Manual Treesitter Installation command
vim.api.nvim_create_user_command("TSInstallAll", function()
	local parsers = require("extensions").ts_parsers
	vim.notify("Installing all configured Tree-sitter parsers...", vim.log.levels.INFO, { title = "Tree-sitter" })
	require("nvim-treesitter.install").install(parsers)
end, { desc = "Install all configured Tree-sitter parsers" })


-- Macro Notifications
vim.api.nvim_create_autocmd("RecordingEnter", {
	callback = function()
		vim.notify("Recording macro...", vim.log.levels.INFO, { title = "Macro", timeout = 1000 })
	end,
})

vim.api.nvim_create_autocmd("RecordingLeave", {
	callback = function()
		local reg = vim.v.recording
		vim.notify("Stopped recording @" .. reg, vim.log.levels.INFO, { title = "Macro", timeout = 1000 })
	end,
})


-- Auto-Save on InsertLeave with 3s Debounce
local save_timer = nil

local function clear_timer()
	if save_timer then
		save_timer:stop()
		save_timer = nil
	end
end

vim.api.nvim_create_autocmd({ "InsertEnter" }, {
	group = augroup("autosave_cancel"),
	callback = clear_timer,
})

vim.api.nvim_create_autocmd({ "InsertLeave" }, {
	group = augroup("autosave"),
	callback = function(args)
		clear_timer()
		if vim.api.nvim_buf_is_valid(args.buf) and vim.bo[args.buf].modified and vim.bo[args.buf].buftype == "" then
			save_timer = vim.defer_fn(function()
				if vim.api.nvim_buf_is_valid(args.buf) and vim.bo[args.buf].modified then
					vim.api.nvim_buf_call(args.buf, function()
						vim.cmd("silent! write")
						vim.notify("Autosaved " .. vim.fn.expand("%:t"), vim.log.levels.INFO, { title = "Auto-Save" })
					end)
				end
			end, 3000)
		end
	end,
})

-- Autoinstall missing plugins on startup
vim.api.nvim_create_autocmd('VimEnter', {
    group = augroup('autoinstall'),
    callback = function()
        local ok, items = pcall(vim.pack.get, nil, { info = true })
        if ok then
            local missing = {}
            for _, item in ipairs(items) do
                if not item.path or vim.fn.isdirectory(item.path) == 0 then
                    table.insert(missing, item.spec.name or item.spec.src:match('([^/]+)/*$'))
                end
            end
            if #missing > 0 then
                vim.notify('Installing missing plugins...', vim.log.levels.INFO, { title = 'vim.pack' })
                vim.pack.update(missing, { force = true })
            end
        end
    end,
})