--[
-- Ensure that the LSP feature is up and runing.
--]

return {
	"neovim/nvim-lspconfig",
	event = { "BufReadPre", "BufNewFile" },
	dependencies = {
		"hrsh7th/cmp-nvim-lsp",
		"williamboman/mason-lspconfig.nvim",
		{ "antosha417/nvim-lsp-file-operations", config = true },
		{ "folke/neodev.nvim", opts = {} },
	},
	config = function()
		local lspconfig = require("lspconfig")
		local mason_lspconfig = require("mason-lspconfig")
		local cmp_nvim_lsp = require("cmp_nvim_lsp")

		vim.api.nvim_create_autocmd("LspAttach", {
			group = vim.api.nvim_create_augroup("UserLspConfig", {}),
			callback = function(ev)
				-- Buffer local mappings.
				-- See `:help vim.lsp.*` for documentation on any of the functions below.

				-- Keybinds
				vim.keymap.set(
					"n",
					"gR",
					"<cmd>Telescope lsp_references<CR>",
					{ buffer = ev.buf, silent = true, desc = "Show LSP references" }
				)
				vim.keymap.set(
					"n",
					"gD",
					vim.lsp.buf.declaration,
					{ buffer = ev.buf, silent = true, desc = "Go to declaration" }
				)
				vim.keymap.set(
					"n",
					"gd",
					"<cmd>Telescope lsp_definitions<CR>",
					{ buffer = ev.buf, silent = true, desc = "Show LSP definitions" }
				)
				vim.keymap.set(
					"n",
					"gi",
					"<cmd>Telescope lsp_implementations<CR>",
					{ buffer = ev.buf, silent = true, desc = "Show LSP implementations" }
				)
				vim.keymap.set(
					"n",
					"gt",
					"<cmd>Telescope lsp_type_definitions<CR>",
					{ buffer = ev.buf, silent = true, desc = "Show LSP type definitions" }
				)
				vim.keymap.set(
					{ "n", "v" },
					"<leader>ca",
					vim.lsp.buf.code_action,
					{ buffer = ev.buf, silent = true, desc = "See available code actions" }
				)
				vim.keymap.set(
					"n",
					"<leader>rn",
					vim.lsp.buf.rename,
					{ buffer = ev.buf, silent = true, desc = "Smart rename" }
				)
				vim.keymap.set(
					"n",
					"<leader>D",
					"<cmd>Telescope diagnostics bufnr=0<CR>",
					{ buffer = ev.buf, silent = true, desc = "Show buffer diagnostics" }
				)
				vim.keymap.set(
					"n",
					"<leader>d",
					vim.diagnostic.open_float,
					{ buffer = ev.buf, silent = true, desc = "Show line diagnostics" }
				)
				vim.keymap.set(
					"n",
					"<d",
					vim.diagnostic.goto_prev,
					{ buffer = ev.buf, silent = true, desc = "Go to previous diagnostic" }
				)
				vim.keymap.set(
					"n",
					">d",
					vim.diagnostic.goto_next,
					{ buffer = ev.buf, silent = true, desc = "Go to next diagnostic" }
				)
				vim.keymap.set(
					"n",
					"K",
					vim.lsp.buf.hover,
					{ buffer = ev.buf, silent = true, desc = "Show documentation for what is under the cursor" }
				)
				vim.keymap.set(
					"n",
					"<leader>rs",
					"<cmd>LspRestart<CR>",
					{ buffer = ev.buf, silent = true, desc = "Restart LSP" }
				)
			end,
		})

		-- used to enable autocompletion (assign to every lsp server config)
		local capabilities = cmp_nvim_lsp.default_capabilities()

		-- Change the diagnostics symbols in the sign column (gutter)
		local signs = { Error = " ", Warn = " ", Hint = "󰠠 ", Info = " " }
		for type, icon in pairs(signs) do
			local hl = "DiagnosticSign" .. type
			vim.fn.sign_define(hl, { text = icon, texthl = hl, numhl = "" })
		end

		mason_lspconfig.setup_handlers({
			-- default handler for installed servers
			function(server_name)
				lspconfig[server_name].setup({
					capabilities = capabilities,
				})
			end,
			["svelte"] = function()
				-- Configuration specific to svelte LSP server
				lspconfig["svelte"].setup({
					capabilities = capabilities,
					on_attach = function(client, _)
						vim.api.nvim_create_autocmd("BufWritePost", {
							pattern = { "*.js", "*.ts" },
							callback = function(ctx)
								-- Here use ctx.match instead of ctx.file
								client.notify("$/onDidChangeTsOrJsFile", { uri = ctx.match })
							end,
						})
					end,
				})
			end,
			["ltex"] = function()
				lspconfig["ltex"].setup({
					filetypes = { "latex", "typst", "typ", "bib", "markdown", "plaintex", "tex" },
					settings = {
						ltex = {
							enabled = { "latex", "typst", "typ", "bib", "markdown", "plaintex", "tex" },
							language = { "en-GB", "fr-FR" },
							setenceCacheSize = 2000,
							additionalRules = {
								enablePickyRules = true,
								motherTongue = "fr-FR",
							},
							checkFrequency = "edit",
						},
					},
				})
			end,
			["lua_ls"] = function()
				lspconfig["lua_ls"].setup({
					capabilities = capabilities,
					settings = {
						Lua = {
							-- make the language server recognize the "vim" global variable
							diagnostics = {
								globals = { "vim" },
							},
							completion = {
								callSnippet = "Replace",
							},
						},
					},
				})
			end,
			["pyright"] = function()
				lspconfig["pyright"].setup({
					capabilities = capabilities,
					settings = {
						python = {
							pythonPath = "/usr/bin/python",
						},
					},
				})
			end,
		})
	end,
}