local M = {}

-- stop lsp error messages
-- https://github.com/L3MON4D3/LuaSnip/blob/master/DOC.md#loaders
local ls = require("luasnip")
local s = ls.snippet
local sn = ls.snippet_node
local isn = ls.indent_snippet_node
local t = ls.text_node
local i = ls.insert_node
local f = ls.function_node
local c = ls.choice_node
local d = ls.dynamic_node
local r = ls.restore_node
local events = require("luasnip.util.events")
local ai = require("luasnip.nodes.absolute_indexer")
local extras = require("luasnip.extras")
local l = extras.lambda
local rep = extras.rep
local p = extras.partial
local m = extras.match
local n = extras.nonempty
local dl = extras.dynamic_lambda
local fmt = require("luasnip.extras.fmt").fmt
local fmta = require("luasnip.extras.fmt").fmta
local conds = require("luasnip.extras.expand_conditions")
local postfix = require("luasnip.extras.postfix").postfix
local types = require("luasnip.util.types")
local parse = require("luasnip.util.parser").parse_snippet
local ms = ls.multi_snippet
local k = require("luasnip.nodes.key_indexer").new_key
-- Example: expanding a snippet on a new line only.
-- In a snippet file, first require the line_begin condition...
local line_begin = conds.line_begin

-- This is the `get_visual` function I've been talking about.
-- ----------------------------------------------------------------------------
-- Summary: When `LS_SELECT_RAW` is populated with a visual selection, the function
-- returns an insert node whose initial text is set to the visual selection.
-- When `LS_SELECT_RAW` is empty, the function simply returns an empty insert node.
M.get_visual = function(_, parent, _, user_args)
	if #parent.snippet.env.LS_SELECT_RAW > 0 then
		return sn(nil, i(1, parent.snippet.env.LS_SELECT_RAW))
	else -- If LS_SELECT_RAW is empty, return a blank insert node
		return sn(nil, i(1, user_args))
	end
end

-- https://github.com/L3MON4D3/LuaSnip/discussions/1195
M.make_single_curly_bracket_snippets = function(type, trig, command, user_args)
	-- return s({trig=keyword,desc=desc}, {t"local function " .. keyword .. "(", i(1), t")"})
	return s({
		trig = trig,
		desc = "Expand " .. trig .. " into \\" .. command .. "{}",
		snippetType = type,
	}, fmt("\\" .. command .. "{<>}", { d(1, M.get_visual, { user_args = { user_args } }) }, { delimiters = "<>" }))
end

M.make_scope_snippets = function(type, trig, command, user_args)
	-- return s({trig=keyword,desc=desc}, {t"local function " .. keyword .. "(", i(1), t")"})
	return s({
		trig = trig,
		desc = "Expand " .. trig .. " into {\\" .. command .. " ... }",
		snippetType = type,
	}, fmt("{\\" .. command .. " <>}", { d(1, M.get_visual, { user_args = { user_args } }) }, { delimiters = "<>" }))
end

return M