-- Author       : swytch
-- Created      : Monday Oct. 04, 2021 16:09:13 CET
-- License      : GPLv3
-- Description  : tex filetype config


local opt       = vim.opt
local g         = vim.g

opt.formatoptions       = "trq1jp"
opt.tabstop             = 4

--  Caps
utils.map("i", "AA", "À")
utils.map("i", "CC", "Ç")
utils.map("i", "EE", "É")

-- Unbreakable spaces
utils.map("i", "<Space>etc", "\\,etc.")
utils.map("i", "<Space>:", "\\,:")

-- Snippets
local ls = require("luasnip")

-- some shorthands...
local s = ls.snippet
local sn = ls.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 copy = utils.copy

-- 'recursive' dynamic snippet. Expands to some text followed by itself.
local function rec_ls()
	return sn(
		nil,
		c(1, {
			-- Order is important, sn(...) first would cause infinite loop of expansion.
			t(""),
			sn(nil, { t({ "", "", "\t\\item " }), i(1), d(2, rec_ls, {}) }),
		})
	)
end

ls.snippets = {
        tex = {
		-- rec_ls is self-referencing. That makes this snippet 'infinite' eg. have as many
		-- \item as necessary by utilizing a choiceNode.
		s("ls", {
			t({ "\\begin{itemize}", "\t\\item " }),
			i(1),
                        t({ "" }),
			d(2, rec_ls, {}),
			t({ "", "\\end{itemize}", "" }),
		}),
		s("lsl", {
			t({ "\\begin{itemize}[label=" }),
                        i(1),
                        t( { "]", "\t\\item " }),
			i(2),
                        t({ "" }),
			d(3, rec_ls, {}),
			t({ "", "\\end{itemize}", "" }),
		}),
                s("frm", {
                        t({ "\\begin{" }),
                        i(1),
                        t({ "}[" }),
                        i(2),
                        t({ "]{" }),
                        f(copy, 1),
                        t({ ":" }),
                        i(3, "foo"),
                        t({ "}", "\t" }),
                        i(0),
                        t({ "", "\\end{" }),
                        f(copy, 1),
                        t({ "}", "" }),
                }),
                s("env", {
                        t({ "\\begin{" }),
                        i(1, "foo"),
                        t({ "}", "\t" }),
                        i(2),
                        t({ "", "\\end{" }),
                        f(copy,1),
                        t({ "}", "" }),
                }),
                s("tikz", {
                        t({ "\\begin{center}" }),
                        t({ "", "\t\\begin{tikzpicture}[main/.style = {draw,circle}]", "\t\t" }),
                        i(1),
                        t({ "", "\t\\end{tikzpicture}", "\\end{center}" }),
                }),
                s("ra", { t( "\\rightarrow" )}),
                s("Ra", { t("\\Rightarrow" )}),
                s("la", { t("\\leftarrow" )}),
                s("La", { t("\\Leftarrow" )}),
                s("lra", { t("\\leftrightarrow" )}),
                s("Lra", { t("\\Leftrightarrow" )}),
                s("bb", {
                        t({ "\\textbf{" }),
                        i(1),
                        t({ "} "}),
                }),
                s("tt", {
                        t({ "\\texttt{" }),
                        i(1),
                        t({ "} "}),
                }),
                s("ii", {
                        t({ "\\textit{" }),
                        i(1),
                        t({ "} "}),
                }),
                s("fsc", {
                        t({ "\\fsc{" }),
                        i(1),
                        t({ "} "}),
                }),
	},
}