local ls = require("luasnip")
local vsc = require("luasnip.loaders.from_vscode")
local lua = require("luasnip.loaders.from_lua")

snip_env = {
	s = require("luasnip.nodes.snippet").S,
	sn = require("luasnip.nodes.snippet").SN,
	t = require("luasnip.nodes.textNode").T,
	f = require("luasnip.nodes.functionNode").F,
	i = require("luasnip.nodes.insertNode").I,
	c = require("luasnip.nodes.choiceNode").C,
	d = require("luasnip.nodes.dynamicNode").D,
	r = require("luasnip.nodes.restoreNode").R,
	l = require("luasnip.extras").lambda,
	rep = require("luasnip.extras").rep,
	p = require("luasnip.extras").partial,
	m = require("luasnip.extras").match,
	n = require("luasnip.extras").nonempty,
	dl = require("luasnip.extras").dynamic_lambda,
	fmt = require("luasnip.extras.fmt").fmt,
	fmta = require("luasnip.extras.fmt").fmta,
	conds = require("luasnip.extras.expand_conditions"),
	types = require("luasnip.util.types"),
	events = require("luasnip.util.events"),
	parse = require("luasnip.util.parser").parse_snippet,
	ai = require("luasnip.nodes.absolute_indexer"),
}

ls.config.set_config({ history = true, updateevents = "TextChanged,TextChangedI" })

-- load friendly-snippets
vsc.lazy_load()
-- load lua snippets
lua.load({ paths = os.getenv("HOME") .. "/.config/nvim/snippets/" })

-- expansion key
-- this will expand the current item or jump to the next item within the snippet.
vim.keymap.set({ "i", "s" }, "<c-j>", function()
	if ls.expand_or_jumpable() then
		ls.expand_or_jump()
	end
end, { silent = true })

-- jump backwards key.
-- this always moves to the previous item within the snippet
vim.keymap.set({ "i", "s" }, "<c-k>", function()
	if ls.jumpable(-1) then
		ls.jump(-1)
	end
end, { silent = true })

-- selecting within a list of options.
vim.keymap.set("i", "<c-h>", function()
	if ls.choice_active() then
		ls.change_choice(1)
	end
end)