local lspconfig = require("lspconfig")
-- import cmp-nvim-lsp plugin
local cmp_nvim_lsp = require("cmp_nvim_lsp")

local keymap = vim.keymap -- for conciseness

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 below functions
		local opts = { buffer = ev.buf, silent = true }

		-- set keybinds
		opts.desc = "Show LSP references"
		keymap.set("n", "lR", "<cmd>Telescope lsp_references<CR>", opts) -- show definition, references

		opts.desc = "Go to declaration"
		keymap.set("n", "lD", vim.lsp.buf.declaration, opts) -- go to declaration

		opts.desc = "Show LSP definitions"
		keymap.set("n", "ld", "<cmd>Telescope lsp_definitions<CR>", opts) -- show lsp definitions

		opts.desc = "Show LSP implementations"
		keymap.set("n", "li", "<cmd>Telescope lsp_implementations<CR>", opts) -- show lsp implementations

		opts.desc = "Show LSP type definitions"
		keymap.set("n", "lt", "<cmd>Telescope lsp_type_definitions<CR>", opts) -- show lsp type definitions

		opts.desc = "See available code actions"
		keymap.set({ "n", "v" }, "<leader>la", vim.lsp.buf.code_action, opts) -- see available code actions, in visual mode will apply to selection

		opts.desc = "Smart rename"
		keymap.set("n", "<leader>mr", vim.lsp.buf.rename, opts) -- smart rename

		opts.desc = "Show buffer diagnostics"
		keymap.set("n", "<leader>lD", "<cmd>Telescope diagnostics bufnr=0<CR>", opts) -- show  diagnostics for file

		opts.desc = "Show line diagnostics"
		keymap.set("n", "<leader>ld", vim.diagnostic.open_float, opts) -- show diagnostics for line

		opts.desc = "Show documentation for what is under cursor"
		keymap.set("n", "K", vim.lsp.buf.hover, opts) -- show documentation for what is under cursor

		opts.desc = "Restart LSP"
		keymap.set("n", "<leader>ls", ":LspRestart<CR>", opts) -- mapping to restart lsp if necessary
	end,
})

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

-- configure matlab server
lspconfig["clangd"].setup({
	capabilities = capabilities,
})
-- configure bash server
lspconfig["bashls"].setup({
	capabilities = capabilities,
})
-- configure html server
lspconfig["html"].setup({
	capabilities = capabilities,
})
-- configure typescript server with plugin
lspconfig["tsserver"].setup({
	capabilities = capabilities,
})

-- configure css server
lspconfig["cssls"].setup({
	capabilities = capabilities,
})

-- configure tailwindcss server
lspconfig["tailwindcss"].setup({
	capabilities = capabilities,
})

-- configure svelte server
lspconfig["svelte"].setup({
	capabilities = capabilities,
	on_attach = function(client, bufnr)
		vim.api.nvim_create_autocmd("BufWritePost", {
			pattern = { "*.js", "*.ts" },
			callback = function(ctx)
				if client.name == "svelte" then
					client.notify("$/onDidChangeTsOrJsFile", { uri = ctx.file })
				end
			end,
		})
	end,
})

-- configure prisma orm server
lspconfig["prismals"].setup({
	capabilities = capabilities,
})

-- configure emmet language server
lspconfig["emmet_ls"].setup({
	capabilities = capabilities,
	filetypes = { "html", "typescriptreact", "javascriptreact", "css", "sass", "scss", "less", "svelte" },
})

-- configure python server
lspconfig["pyright"].setup({
	capabilities = capabilities,
})

-- configure lua server (with special settings)
lspconfig["lua_ls"].setup({
	capabilities = capabilities,
	settings = { -- custom settings for lua
		Lua = {
			-- make the language server recognize "vim" global
			diagnostics = {
				globals = { "vim" },
			},
			workspace = {
				-- make language server aware of runtime files
				library = {
					[vim.fn.expand("$VIMRUNTIME/lua")] = true,
					[vim.fn.stdpath("config") .. "/lua"] = true,
				},
			},
		},
	},
})

local x = vim.diagnostic.severity
local config = {
	-- Enable virtual text
	virtual_text = { -- or false for disable
		prefix = "", -- ■  󰊠
		suffix = "",
		format = function(diagnostic)
			local prefix = "󰊠 "
			local suffix = " "
			-- return full message with custom prefix & suffix
			return prefix .. diagnostic.message .. suffix
		end,
	},
	update_in_insert = true,
	signs = { text = { [x.ERROR] = "", [x.WARN] = "", [x.HINT] = "󰌵", [x.INFO] = "" } },
	underline = false,
	severity_sort = true,
	float = {
		focusable = false,
		style = "minimal",
		border = "rounded",
		source = "always",
		header = "",
		prefix = "",
	},
}

vim.diagnostic.config(config)
-- add borders to lsp info window
require("lspconfig.ui.windows").default_options.border = "single"