------------------------------------------------------
---- Runtime -----------------------------------------
------------------------------------------------------

-- Ensure XDG environment variables are set
vim.env.XDG_CONFIG_HOME = vim.env.XDG_CONFIG_HOME or vim.env.HOME .. "/.config"
vim.env.XDG_CACHE_HOME = vim.env.XDG_CACHE_HOME or vim.env.HOME .. "/.cache"
vim.env.XDG_DATA_HOME = vim.env.XDG_DATA_HOME or vim.env.HOME .. "/.local/share"

-- Ensure the Neovim cache directory exists
local nvim_cache_dir = vim.env.XDG_CACHE_HOME .. "/nvim"
if vim.fn.isdirectory(nvim_cache_dir) == 0 then
	vim.fn.mkdir(nvim_cache_dir, "p")
end

-- Ensure necessary paths are in $PATH
local paths = { "/usr/local/bin", "/opt/brew/bin", "/opt/homebrew/bin" }
for _, path in ipairs(paths) do
	if not string.match(vim.env.PATH, path) then
		vim.env.PATH = path .. ":" .. vim.env.PATH
	end
end

-- Add node_modules/.bin/ to PATH for Node.js projects
if not string.match(vim.env.PATH, "node_modules/%.bin") then
	vim.env.PATH = vim.env.PATH .. ":node_modules/.bin/"
end

-- Speed up startup by explicitly setting the Python interpreter
local python_paths = {
	"/opt/brew/bin/python3",
	"/opt/homebrew/bin/python3",
	"/usr/local/bin/python3",
	"/usr/bin/python3",
}
for _, path in ipairs(python_paths) do
	if vim.fn.executable(path) == 1 then
		vim.g.python3_host_prog = path
		break
	end
end

-- Disable unused language providers (no Ruby/Perl remote plugins here).
-- Skips provider probing at startup and quiets :checkhealth.
vim.g.loaded_ruby_provider = 0
vim.g.loaded_perl_provider = 0

------------------------------------------------------
---- Basics ------------------------------------------
------------------------------------------------------

-- colorscheme is set from
-- ~/.local/share/nvim/colors.lua

-- Set leader key
vim.g.mapleader = " "

-- Sensible defaults
vim.opt.encoding = "utf-8"
vim.opt.mouse = "a" -- Use mouse in terminal
vim.opt.showcmd = true
vim.opt.ruler = true -- Show cursor position
vim.opt.number = true -- Show line numbers
-- vim.opt.cursorline = true -- Highlight current line
vim.opt.showmatch = true -- Highlight matching brackets/braces
vim.opt.matchtime = 5 -- Duration to show matching brace (1/10 sec)
-- vim.opt.shortmess:append("I") -- Disable intro message / splash screen
vim.opt.splitbelow = true -- New horizontal splits go below
vim.opt.splitright = true -- New vertical splits go right
vim.opt.backspace = { "indent", "eol", "start" } -- Backspace works across lines
vim.opt.hidden = true -- Allow changing buffers without saving
vim.opt.errorbells = false
vim.opt.autoread = true -- Auto read when file changes elsewhere
vim.opt.autowrite = true -- Auto write before :next, :make, etc.
vim.opt.cmdheight = 2 -- More space for messages
vim.opt.scrolloff = 5 -- Start scrolling when within 5 lines near top/bottom
vim.opt.laststatus = 2 -- Always display the status line
vim.opt.termguicolors = true -- Use 24-bit colors in the terminal
vim.opt.updatetime = 200 -- Snappier CursorHold + gitsigns (default 4000)
vim.opt.timeoutlen = 300 -- Faster which-key / mapped-sequence timeout (default 1000)
vim.o.winborder = "rounded" -- Consistent border on all floating windows (0.11+)
vim.opt.splitkeep = "screen" -- Keep text visually stable when opening/closing splits
-- Unified sign/number/fold/git gutter (snacks.statuscolumn, enabled in ui.lua)
vim.o.statuscolumn = [[%!v:lua.require'snacks.statuscolumn'.get()]]

-- Bash-like autocomplete for commands
vim.opt.wildmode = { "list:longest", "list:full" } -- First tab completes longest, second cycles
vim.opt.wildmenu = true

-- Indentation
vim.opt.expandtab = true
vim.opt.tabstop = 4
vim.opt.softtabstop = 4
vim.opt.shiftwidth = 4
vim.opt.autoindent = true

-- Invisibles
vim.opt.listchars = { tab = "▸ ", eol = "¬", nbsp = "☠", trail = "⍁" }
vim.opt.list = false

-- Wrapping
vim.opt.wrap = true
vim.opt.linebreak = true
vim.opt.showbreak = "…"
vim.opt.formatoptions:remove("t")
-- vim.opt.textwidth = 80
-- vim.opt.colorcolumn = "80"

-- Autocomplete
vim.opt.completeopt = { "longest", "preview", "menu" }
vim.opt.dictionary:remove("/usr/share/dict/words")
vim.opt.dictionary:append("/usr/share/dict/words")
vim.opt.thesaurus:remove("/usr/share/dict/mthesaur")
vim.opt.thesaurus:append("/usr/share/dict/mthesaur")

-- Searching
vim.opt.ignorecase = true
vim.opt.smartcase = true
vim.opt.incsearch = true
vim.opt.hlsearch = true

-- Folding
vim.opt.foldmethod = "expr"
vim.opt.foldexpr = "v:lua.vim.treesitter.foldexpr()"
vim.opt.foldtext = "v:lua.vim.treesitter.foldtext()"
vim.opt.foldnestmax = 4
vim.opt.foldminlines = 3
vim.opt.foldlevel = 5
vim.opt.foldtext =
	[[substitute(getline(v:foldstart),'\\t',repeat('\ ',&tabstop),'g').'…'.trim(getline(v:foldend)) . ' (#' . (v:foldend - v:foldstart + 1) . ' lines)']]
vim.opt.fillchars = "fold: "

-- Swap and Undo Directories
local swapdir = os.getenv("XDG_CACHE_HOME") .. "/nvim/swap//"
if vim.fn.isdirectory(swapdir) == 0 then
	vim.fn.mkdir(swapdir, "p")
end
vim.opt.swapfile = true
vim.opt.directory = swapdir

local undodir = os.getenv("XDG_CACHE_HOME") .. "/nvim/undo//"
if vim.fn.isdirectory(undodir) == 0 then
	vim.fn.mkdir(undodir, "p")
end
vim.opt.undofile = true
vim.opt.undodir = undodir

-- File Search Path
vim.opt.path = ".,,**"

-- Disable netrw, we're using nvim-tree instead
vim.g.loaded_netrw = 1
vim.g.loaded_netrwPlugin = 1

-- Set SHELL command
if vim.fn.executable("/usr/local/bin/zsh") == 1 then
	vim.opt.shell = "/usr/local/bin/zsh -l"
elseif vim.fn.executable("/usr/bin/zsh") == 1 then
	vim.opt.shell = "/usr/bin/zsh -l"
end

-- Terminal settings
vim.g.terminal_scrollback_buffer_size = 10000 -- Store reasonable amount of terminal history

-- Built-in :grep command
if vim.fn.executable("rg") == 1 then
	vim.opt.grepprg = "rg --vimgrep --smart-case --no-heading"
	vim.opt.grepformat = "%f:%l:%c:%m,%f:%l:%m"
elseif vim.fn.executable("ag") == 1 then
	vim.opt.grepprg = "ag --vimgrep --smart-case --noheading"
	vim.opt.grepformat = "%f:%l:%c:%m,%f:%l:%m" -- this has not been tested
end

------------------------------------------------------
---- Neovide (GUI) -----------------------------------
------------------------------------------------------

if vim.g.neovide then
	-- Put anything you want to happen only in Neovide here
	-- vim.o.guifont = "LiterationMono Nerd Font Mono:14"
	-- vim.o.guifont = "SauceCodePro NF:h16"
	vim.o.guifont = "Agave Nerd Font Mono:h16"
	-- vim.o.guifont = "SFMono Nerd Font:h16"
	-- vim.o.guifont = "FiraCode Nerd Font:h16"

	vim.g.neovide_opacity = 0.8
	vim.g.transparency = 1

	vim.g.neovide_scale_factor = 1.0
	local change_scale_factor = function(delta)
		vim.g.neovide_scale_factor = vim.g.neovide_scale_factor * delta
	end
	vim.keymap.set("n", "<C-=>", function()
		change_scale_factor(1.05)
	end)
	vim.keymap.set("n", "<C-->", function()
		change_scale_factor(1 / 1.05)
	end)
	vim.keymap.set("n", "<C-0>", function()
		change_scale_factor(1)
	end)

	vim.g.neovide_window_blurred = true
	vim.g.neovide_show_border = false
	vim.g.neovide_input_macos_option_key_is_meta = "only_left"

	-- vim.g.neovide_cursor_animation_length = 0.150
	vim.g.neovide_cursor_animation_length = 0.025
	vim.g.neovide_cursor_short_animation_length = 0.5
	vim.g.neovide_cursor_trail_size = 0.2
	vim.g.neovide_cursor_vfx_mode = "pixiedust"

	vim.keymap.set("n", "<D-n>", function()
		vim.fn.jobstart("neovide --fork", { detach = true })
	end) -- Open new instance
	vim.keymap.set("n", "<D-s>", ":w<CR>") -- Save
	vim.keymap.set("v", "<D-c>", '"+y') -- Copy
	vim.keymap.set("n", "<D-v>", '"+P') -- Paste normal mode
	vim.keymap.set("v", "<D-v>", '"+P') -- Paste visual mode
	vim.keymap.set("c", "<D-v>", "<C-R>+") -- Paste command mode
	vim.keymap.set("i", "<D-v>", "<C-R>+") -- Paste insert mode

	local dirs = { "/Volumes/Sense/src", "~/src" }
	for _, dir in ipairs(dirs) do
		if vim.fn.isdirectory(dir) == 1 then
			vim.cmd("cd " .. dir)
			break
		end
	end
end

------------------------------------------------------
---- lazy.nvim ---------------------------------------
------------------------------------------------------

-- this will load ~/.config/nvim/lua/config/lazy.lua
-- Guarded so re-sourcing init.lua (via <Leader><) does not call lazy.setup()
-- again; only the options/keymaps/autocmds below get re-applied.
if not vim.g.lazy_bootstrapped then
	vim.g.lazy_bootstrapped = true
	require("config.lazy")
end

------------------------------------------------------
---- Terminal ----------------------------------------
------------------------------------------------------

-- Terminal lives under <Leader>; so <Leader>t is free for tests (neotest)
vim.keymap.set("n", "<Leader>;v", ":vsplit term://$SHELL<CR>i", { desc = "Terminal in vertical split" })
vim.keymap.set("n", "<Leader>;s", ":belowright split term://$SHELL<CR>i", { desc = "Terminal in horizontal split" })
-- Toggleable, reusable terminal (snacks) — hide/show without re-spawning
vim.keymap.set("n", "<Leader>;t", function()
	Snacks.terminal.toggle()
end, { desc = "Toggle terminal" })
vim.keymap.set("t", "<Esc>", "<C-\\><C-n>", { desc = "Exit terminal mode" })

------------------------------------------------------
---- Running the current file ------------------------
------------------------------------------------------

-- Run a command in a terminal, optionally in a split: split_mode = "v" | "h" | nil
local function run_cur(cmd, split_mode)
	if split_mode == "v" then
		vim.cmd("vsplit")
	elseif split_mode == "h" then
		vim.cmd("split")
	end
	vim.cmd("terminal " .. cmd)
end

-- Determine the interpreter and run the current file
local function run_cur_self(split_mode)
	vim.cmd("write") -- Save the file

	local filetype = vim.bo.filetype
	local interpreter

	if vim.fn.filereadable("run.sh") == 1 then
		interpreter = "bash run.sh"
	elseif vim.fn.filereadable("sh/run.sh") == 1 then
		interpreter = "bash sh/run.sh"
	elseif filetype == "sh" then
		interpreter = "bash"
	elseif filetype:match("javascript") then
		interpreter = "node"
	elseif filetype:match("scala") then
		interpreter = "scala"
	elseif filetype == "python" then
		interpreter = "pyexec"
	elseif filetype:match("lua") then
		interpreter = "lua"
	elseif filetype == "make" then
		run_cur("make", split_mode)
	-- or, if the file is executable, run it directly
	elseif vim.fn.executable(vim.fn.expand("%")) == 1 then
		interpreter = ""
	else
		print("No interpreter set for filetype=" .. filetype)
		return
	end

	-- Use absolute path and shell-escape the filename
	local file = vim.fn.shellescape(vim.fn.expand("%:p"))
	run_cur(interpreter .. " " .. file, split_mode)
end

vim.keymap.set("n", "<Leader>nn", function()
	run_cur_self(nil)
end, { desc = "Run current file" })
vim.keymap.set("n", "<Leader>nv", function()
	run_cur_self("v")
end, { desc = "Run current file (vertical split)" })
vim.keymap.set("n", "<Leader>ns", function()
	run_cur_self("h")
end, { desc = "Run current file (horizontal split)" })

------------------------------------------------------
---- Diagnostics -------------------------------------
------------------------------------------------------

vim.diagnostic.config({
	virtual_lines = { current_line = true }, -- full diagnostic inline, cursor line only
	virtual_text = false,
	signs = false,
	underline = true,
	update_in_insert = false,
	severity_sort = true,
	float = {
		border = "rounded",
		source = true, -- always show the source (was the deprecated "always")
		header = "",
		prefix = "",
	},
})
local function mapDiagnosticsToggle(key, diagnostic_option)
	vim.keymap.set("n", key, function()
		local current_config = vim.diagnostic.config() or {}
		local new_config = not current_config[diagnostic_option]
		vim.diagnostic.config({ [diagnostic_option] = new_config })
	end, { desc = "Toggle diagnostic " .. diagnostic_option })
end
mapDiagnosticsToggle("<Leader>dl", "virtual_lines")
mapDiagnosticsToggle("<Leader>dt", "virtual_text")
mapDiagnosticsToggle("<Leader>ds", "signs")
mapDiagnosticsToggle("<Leader>du", "underline")
vim.keymap.set("n", "<Leader>dd", function()
	vim.diagnostic.enable(not vim.diagnostic.is_enabled())
end, { desc = "Toggle diagnostics" })
vim.keymap.set("n", "<Leader>dq", function()
	vim.diagnostic.setqflist()
end, { desc = "Show all diagnostics in quickfix" })
vim.keymap.set("n", "<Leader>dh", function()
	vim.lsp.inlay_hint.enable(not vim.lsp.inlay_hint.is_enabled({}))
end, { desc = "Toggle inlay hints" })

------------------------------------------------------
---- Productivity ------------------------------------
------------------------------------------------------

vim.keymap.set("n", "<Leader>,", ":e $MYVIMRC<CR>", { noremap = true, silent = true })
vim.keymap.set("n", "<Leader><", function()
	-- Re-applies options/keymaps/autocmds. The lazy bootstrap is guarded above,
	-- so this does not re-run lazy.setup(). For plugin changes use :Lazy reload
	-- <plugin> or restart.
	dofile(vim.env.MYVIMRC)
	vim.notify("Core config reloaded", vim.log.levels.INFO)
end, { desc = "Reload core config (options/keymaps/autocmds)" })
vim.keymap.set("n", "<Leader>w", ":update<CR>", { desc = "Save file if modified" })
vim.keymap.set("n", "<Leader>W", ":write<CR>", { desc = "Save file" })
vim.keymap.set("n", "<Leader>\\", ":nohl<CR>", { desc = "Clear search highlights" })

-- Quickfix navigation
vim.keymap.set("n", "]q", ":cnext<CR>", { desc = "Quickfix next" })
vim.keymap.set("n", "[q", ":cprevious<CR>", { desc = "Quickfix previous" })
vim.keymap.set("n", "[[", function()
	local qf_exists = false
	for _, win in pairs(vim.fn.getwininfo()) do
		if win["quickfix"] == 1 then
			qf_exists = true
			break
		end
	end
	if qf_exists then
		vim.cmd("cclose")
	else
		vim.cmd("copen")
	end
end, { desc = "Quickfix toggle" })
vim.keymap.set("n", "[]", ":copen<CR>", { desc = "Quickfix open" })
vim.keymap.set("n", "][", ":cclose<CR>", { desc = "Quickfix close" })

-- Location list navigation
vim.keymap.set("n", "]l", ":lnext<CR>", { noremap = true, silent = true, desc = "Location list next" })
vim.keymap.set("n", "[l", ":lprevious<CR>", { noremap = true, silent = true, desc = "Location list previous" })

-- Common typing mistakes
vim.cmd([[cnoreabbrev E e]])
vim.cmd([[inoreabbrev requrie require]])
vim.cmd([[inoreabbrev lenght length]])

-- Copy current filename with line number
vim.keymap.set(
	"n",
	"<Leader><Leader>l",
	":let @+ = expand('%') . ':' . line('.')<CR>",
	{ noremap = true, silent = true }
)

-- %% expands to dirname of current file
vim.cmd([[cnoremap <expr> %% getcmdtype() == ':' ? expand('%:p:h').'/' : '%%']])

-- Redraw screen
vim.keymap.set("n", "<C-n>", "<C-l>", { noremap = true, silent = true })

-- Disable distracting features in current buffer
vim.keymap.set("n", "<Leader>C", function()
	-- Disable gitsigns
	require("gitsigns").setup({ signcolumn = false })

	-- Disable snacks.indent for current buffer
	vim.b.snacks_indent = false

	-- Disable line numbers and listchars
	vim.opt_local.number = false
	vim.opt_local.list = false

	vim.opt_local.showtabline = 0 -- Hide bufferline
	-- disable diagnostics

	vim.cmd("nohlsearch") -- cclear search highlight
	vim.diagnostic.enable(false)

	vim.opt_local.cursorline = false -- Disable cursorline

	require("lualine").hide()

	vim.notify("Disabled distractions in current buffer", vim.log.levels.INFO)
end, { desc = "Disable distractions" })

------------------------------------------------------
---- Autocommands ------------------------------------
------------------------------------------------------

local api = vim.api

-- Primary autocmd group. clear=true means re-sourcing the config replaces these
-- handlers instead of stacking duplicates.
local szAutoGroup = api.nvim_create_augroup("szAutoGroup", { clear = true })

-- Trigger autoread when files change on disk
api.nvim_create_autocmd({ "FocusGained", "BufEnter", "CursorHold", "CursorHoldI" }, {
	group = szAutoGroup,
	pattern = "*",
	command = "if mode() !~ '\\v(c|r.?|!|t)' && getcmdwintype() == '' | checktime | endif",
})
-- Notification after file change
api.nvim_create_autocmd("FileChangedShellPost", {
	group = szAutoGroup,
	pattern = "*",
	callback = function()
		vim.notify("File changed on disk. Buffer reloaded.", vim.log.levels.WARN)
	end,
})

-- Terminal buffers: no line numbers, soft wrap
api.nvim_create_autocmd("TermOpen", {
	group = szAutoGroup,
	pattern = "*",
	callback = function()
		vim.opt_local.number = false
		vim.opt_local.relativenumber = false
		vim.opt_local.wrap = true
	end,
})

-- Project-specific keybindings
local function project_has_file(filename)
	return vim.fn.filereadable(vim.fn.getcwd() .. "/" .. filename) == 1
end

local function setup_project_keybindings()
	-- Clear any existing project keybindings
	pcall(vim.keymap.del, "n", "<Leader>cT")

	-- TypeScript compilation: <Leader>cT (requires tsconfig.json)
	if project_has_file("tsconfig.json") then
		vim.keymap.set("n", "<Leader>cT", function()
			vim.opt.makeprg = "npx tsc --noEmit"
			vim.opt.errorformat = "%f(%l,%c): %trror TS%n: %m,%f(%l,%c): %tarning TS%n: %m"
			vim.cmd("make!")
			vim.cmd("copen")
		end, { desc = "TypeScript compile to quickfix" })
	end
end

api.nvim_create_autocmd("VimEnter", {
	group = szAutoGroup,
	callback = setup_project_keybindings,
})
api.nvim_create_autocmd("DirChanged", {
	group = szAutoGroup,
	callback = setup_project_keybindings,
})

-- Filetype detection & settings
api.nvim_create_autocmd({ "BufRead", "BufNewFile", "BufEnter" }, {
	group = szAutoGroup,
	pattern = "*/.kube/config",
	command = "setlocal nowrap filetype=yaml",
})
api.nvim_create_autocmd({ "BufRead", "BufNewFile", "BufEnter" }, {
	group = szAutoGroup,
	pattern = "*gitconfig*,*git/config*",
	command = "setlocal filetype=gitconfig",
})
api.nvim_create_autocmd("FileType", {
	group = szAutoGroup,
	pattern = "matlab",
	command = "setlocal commentstring=%\\ %s",
})
api.nvim_create_autocmd("FileType", {
	group = szAutoGroup,
	pattern = "tf",
	command = "setlocal commentstring=#\\ %s",
})
api.nvim_create_autocmd("FileType", {
	group = szAutoGroup,
	pattern = "tla",
	command = "setlocal commentstring=\\\\*\\ %s",
})
api.nvim_create_autocmd("FileType", {
	group = szAutoGroup,
	pattern = "sql",
	command = "setlocal commentstring=--\\ %s",
})
api.nvim_create_autocmd({ "BufRead", "BufNewFile" }, {
	group = szAutoGroup,
	pattern = "*Dockerfile*",
	command = "set filetype=Dockerfile",
})
api.nvim_create_autocmd({ "BufRead", "BufNewFile" }, {
	group = szAutoGroup,
	pattern = "*Jenkinsfile*",
	command = "set filetype=groovy",
})
api.nvim_create_autocmd({ "BufRead", "BufNewFile" }, {
	group = szAutoGroup,
	pattern = "*.keymap",
	command = "set filetype=dts | setlocal commentstring=//\\ %s",
})
api.nvim_create_autocmd({ "BufRead", "BufNewFile" }, {
	group = szAutoGroup,
	pattern = "*.mjml",
	command = "set filetype=html",
})

-- Allow comments in JSON files
api.nvim_create_autocmd("FileType", {
	group = szAutoGroup,
	pattern = "json",
	command = [[syntax match Comment +\/\/.\+$+]],
})

-- Insert console.log() in JS/TS files
api.nvim_create_autocmd("FileType", {
	group = szAutoGroup,
	pattern = { "javascript", "typescript", "javascriptreact", "typescriptreact" },
	command = "inoremap <C-l> console.log()<Esc>i",
})

-- Restore cursor to file position from the previous editing session
api.nvim_create_autocmd("BufReadPost", {
	group = szAutoGroup,
	callback = function(args)
		local mark = api.nvim_buf_get_mark(args.buf, '"')
		local line_count = api.nvim_buf_line_count(args.buf)
		if mark[1] > 0 and mark[1] <= line_count then
			api.nvim_win_set_cursor(0, mark)
			-- defer centering slightly so it's applied after render
			vim.schedule(function()
				vim.cmd("normal! zz")
			end)
		end
	end,
})

-- QuickFix window behavior
api.nvim_create_autocmd("QuickFixCmdPost", {
	group = szAutoGroup,
	pattern = "*grep*",
	command = "cwindow",
})

-- Only allow a single tab when starting Neovim
api.nvim_create_autocmd("VimEnter", {
	group = szAutoGroup,
	pattern = "*",
	command = "silent! tabonly",
})

-- Open help in a vertical split
api.nvim_create_autocmd("FileType", {
	group = szAutoGroup,
	pattern = "help",
	command = "wincmd L",
})

-- Auto resize splits when the terminal window is resized
api.nvim_create_autocmd("VimResized", {
	group = szAutoGroup,
	command = "wincmd =",
})

-- Highlight yanked text
api.nvim_create_autocmd("TextYankPost", {
	group = api.nvim_create_augroup("highlight_yank", { clear = true }),
	pattern = "*",
	desc = "highlight selection on yank",
	callback = function()
		vim.hl.on_yank({ timeout = 200, visual = true })
	end,
})

-- Swapfile recovery
api.nvim_create_autocmd("SwapExists", {
	group = szAutoGroup,
	pattern = "*",
	command = "let b:swapchoice = '?' | let b:swapname = v:swapname",
})
api.nvim_create_autocmd("BufReadPost", {
	group = szAutoGroup,
	pattern = "*",
	command = "let b:swapchoice_likely = (&l:ro ? 'o' : 'r')",
})
api.nvim_create_autocmd("BufEnter", {
	group = szAutoGroup,
	pattern = "*",
	command = "let b:swapchoice_likely = (&l:ro ? 'o' : 'e')",
})
api.nvim_create_autocmd("BufWinEnter", {
	group = szAutoGroup,
	pattern = "*",
	command = [[
        if exists('b:swapchoice') && exists('b:swapchoice_likely') |
            let b:swapchoice = b:swapchoice_likely |
            unlet b:swapchoice_likely |
        endif
    ]],
})

-- Open a diff against the original file version
local function diff_orig()
	vim.cmd("vert new")
	vim.opt_local.buftype = "nofile"
	vim.cmd("r #")
	vim.cmd("0d_")
	vim.cmd("diffthis")
	vim.cmd("wincmd p")
	vim.cmd("diffthis")
end
-- Handle swap file recovery
local function handle_recover()
	vim.fn.system(
		"diff - " .. vim.fn.shellescape(vim.fn.expand("%:p")),
		table.concat(vim.fn.getline(1, "$") --[[@as string[] ]], "\n") .. "\n"
	)
	if vim.v.shell_error ~= 0 then
		diff_orig()
	else
		vim.fn.delete(vim.b.swapname)
		vim.notify("No differences; deleting the old swap file.", vim.log.levels.WARN)
		api.nvim_feedkeys(" ", "n", false)
	end
end
api.nvim_create_autocmd("BufWinEnter", {
	group = szAutoGroup,
	pattern = "*",
	callback = function()
		if vim.b.swapchoice == "r" then
			handle_recover()
		end
	end,
})

-- Show cursorline only in the active window
local active_cursorline = api.nvim_create_augroup("active_cursorline", { clear = true })
api.nvim_create_autocmd({ "WinEnter", "BufEnter" }, {
	group = active_cursorline,
	callback = function()
		vim.opt_local.cursorline = true
	end,
})
api.nvim_create_autocmd({ "WinLeave", "BufLeave" }, {
	group = active_cursorline,
	callback = function()
		vim.opt_local.cursorline = false
	end,
})

-- LSP reference highlighting under the cursor is handled by snacks.words
-- (configured in lua/plugins/ui.lua), which uses CursorHold rather than firing
-- an LSP request on every cursor move.