-- nvim-treesitter
--- Interface to the AST-level parser generator 'tree-sitter', enabling operations on source code that intelligently understand the syntax.
--- Out of the box, grammer-aware code highlighting, indentation, etc. .
--- Base for a lot of other plugins that rely on these kinds of features.

--- TODO: Look into extensions for:
--- * Text Objects: https://github.com/nvim-treesitter/nvim-treesitter-textobjects
--- As always, consult <http://www.lazyvim.org/plugins/treesitter>

return {
	'nvim-treesitter/nvim-treesitter',
	commit = 'cfc6f2c117aaaa82f19bcce44deec2c194d900ab',

	dependencies = {
		{
			'nvim-treesitter/nvim-treesitter-textobjects',
			commit = 'ad8f0a472148c3e0ae9851e26a722ee4e29b1595',
		},
	},

	build = ':TSUpdate all', -- Update lang parsers unconditionally on build

	lazy = vim.fn.argc(-1) == 0, -- Load early only when opening file w/cmdline
	event = {
		'VeryLazy',
	},
	cmd = {
		'TSUpdateSync',
		'TSUpdate',
		'TSInstall',
	},
	init = function(plugin)
		--- Many plugins apparently no longer require("nvim-treesitter").
		--- This messes with the lazy-loading logic.
		--- However, such plugins only otherwise use custom queries (seems to be called "RTP").
		--- We therefore register treesitter w/RTP, so such queries will load treesitter.
		require('lazy.core.loader').add_to_rtp(plugin)
		require('nvim-treesitter.query_predicates')
	end,

	opts = {
		-- Grammer-Aware Syntax Highlighting
		highlight = {
			enable = true,
		},

		-- Grammer-Aware Indentation
		--- TODO: EXPERIMENTAL - CAREFUL!
		--indent = { enable = true },

		textobjects = {
			select = {
				enable = true,
				lookahead = false,
				keymaps = {
					-- You can use the capture groups defined in textobjects.scm
					['af'] = {
						query = '@function.outer',
						desc = 'Select [A]round [F]unction',
					},
					['if'] = {
						query = '@function.inner',
						desc = 'Select [I]nside [F]unction',
					},
					['al'] = {
						query = '@class.outer',
						desc = 'Select [A]round C[L]ass',
					},
					['il'] = {
						query = '@class.outer',
						desc = 'Select [I]nside C[L]ass',
					},
					['ac'] = {
						query = '@cell.outer',
						desc = 'Select [A]round [C]ell',
					},
					['ic'] = {
						query = '@cell.inner',
						desc = 'Select [I]nside [C]ell',
					},
				},
			},
			move = {
				enable = true,
				set_jumps = true,
			},
		},

		-- Always Install Parsers for Languages
		ensure_installed = {
			'ada',
			'arduino',
			'asm',
			'awk',
			'bash',
			'bibtex',
			'c',
			'c_sharp',
			'clojure',
			'cmake',
			'comment',
			'commonlisp',
			'cpp',
			'css',
			'csv',
			'cuda',
			'd',
			'dart',
			'diff',
			'disassembly',
			'dockerfile',
			'dot',
			'doxygen',
			'dtd',
			'editorconfig',
			'eex',
			'elixir',
			'elm',
			'erlang',
			'fennel',
			'fish',
			'forth',
			'fortran',
			'fsh',
			'fsharp',
			'gap',
			'gdscript',
			'gdshader',
			'git_config',
			'git_rebase',
			'gitattributes',
			'gitcommit',
			'gitignore',
			'gleam',
			'glsl',
			'gnuplot',
			'go',
			'gpg',
			'graphql',
			'haskell',
			'hcl',
			'hlsl',
			'hlsplaylist',
			'html',
			'htmldjango',
			'hyprlang',
			'ini',
			'java',
			'javascript',
			'jq',
			'jsdoc',
			'json',
			'json5',
			'jsonc',
			'jsonnet',
			'julia',
			'just',
			'kconfig',
			'kdl',
			'latex',
			'llvm',
			'lua',
			'luadoc',
			'luap',
			'luau',
			'm68k',
			'make',
			'markdown',
			'markdown_inline',
			'matlab',
			'meson',
			'mlir',
			'nasm',
			'nginx',
			'nix',
			'objc',
			'objdump',
			'ocaml',
			'pascal',
			'pem',
			'perl',
			'php',
			'phpdoc',
			'po',
			'pod',
			'powershell',
			'printf',
			'prisma',
			'prolog',
			'promql',
			'proto',
			'puppet',
			'pymanifest',
			'python',
			'qmldir',
			'qmljs',
			'r',
			'readline',
			'regex',
			'requirements',
			'robots',
			'rst',
			'ruby',
			'rust',
			'scala',
			'scss',
			'sflog',
			'smithy',
			'sql',
			'ssh_config',
			'starlark',
			'strace',
			'svelte',
			'swift',
			't32',
			'tablegen',
			'tcl',
			'teal',
			'terraform',
			'tmux',
			'todotxt',
			'toml',
			'tsv',
			'tsx',
			'turtle',
			'typescript',
			'typespec',
			'typst',
			'udev',
			'unison',
			'usd',
			'vala',
			'verilog',
			'vim',
			'vimdoc',
			'vue',
			'wgsl',
			'wgsl_bevy',
			'xml',
			'xresources',
			'yaml',
			'zathurarc',
			'zig',
		},
	},
	config = function(_, opts)
		require('nvim-treesitter.configs').setup(opts)

		-- Use Treesitter as the Folding Method
		--vim.opt.foldmethod = "expr"
		--vim.opt.foldexpr = "nvim_treesitter#foldexpr()"
		--
		require('vim.treesitter.query').set(
			'markdown',
			'highlights',
			[[
		;From MDeiml/tree-sitter-markdown
		[
		  (fenced_code_block_delimiter)
		] @punctuation.delimiter
		]]
		)
	end,
}