local M = { "hrsh7th/nvim-cmp" }

M.dependencies = {
	"saadparwaiz1/cmp_luasnip",
	"hrsh7th/cmp-buffer",
	"hrsh7th/cmp-path",
	"hrsh7th/cmp-nvim-lsp",
}

M.event = "InsertEnter"

M.opts = function()
	local cmp = require("cmp")
	local snip_status_ok, luasnip = pcall(require, "luasnip")
	local lspkind_status_ok, lspkind = pcall(require, "lspkind")
	if not snip_status_ok then
		return
	end

	local border_opts = {
		border = "rounded",
		winhighlight = "Normal:NormalFloat,FloatBorder:FloatBorder,CursorLine:PmenuSel,Search:None",
	}

	local function has_words_before()
		local line, col = (unpack or table.unpack)(vim.api.nvim_win_get_cursor(0))
		return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil
	end

	return {
		enabled = function()
			local dap_prompt = require("funcs").is_available("cmp-dap")
				and vim.tbl_contains(
					{ "dap-repl", "dapui_watches", "dapui_hover" },
					vim.api.nvim_get_option_value("filetype", { buf = 0 })
				)
			if vim.api.nvim_get_option_value("buftype", { buf = 0 }) == "prompt" and not dap_prompt then
				return false
			end
			return true
		end,
		preselect = cmp.PreselectMode.None,
		formatting = {
			fields = { "kind", "abbr", "menu" },
			format = lspkind_status_ok and lspkind.cmp_format(require("plugins.misc.lspkind").opts) or nil,
		},
		snippet = {
			expand = function(args)
				luasnip.lsp_expand(args.body)
			end,
		},
		duplicates = {
			nvim_lsp = 1,
			luasnip = 1,
			cmp_tabnine = 1,
			buffer = 1,
			path = 1,
		},
		confirm_opts = {
			behavior = cmp.ConfirmBehavior.Replace,
			select = false,
		},
		window = {
			completion = cmp.config.window.bordered(border_opts),
			documentation = cmp.config.window.bordered(border_opts),
		},
		mapping = {
			["<Up>"] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Select }),
			["<Down>"] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Select }),
			["<C-p>"] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Insert }),
			["<C-n>"] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Insert }),
			["<C-k>"] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Insert }),
			["<C-j>"] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Insert }),
			["<C-u>"] = cmp.mapping(cmp.mapping.scroll_docs(-4), { "i", "c" }),
			["<C-d>"] = cmp.mapping(cmp.mapping.scroll_docs(4), { "i", "c" }),
			["<C-Space>"] = cmp.mapping(cmp.mapping.complete(), { "i", "c" }),
			["<C-y>"] = cmp.config.disable,
			["<C-e>"] = cmp.mapping({ i = cmp.mapping.abort(), c = cmp.mapping.close() }),
			["<CR>"] = cmp.mapping.confirm({ select = false }),
			["<Tab>"] = cmp.mapping(function(fallback)
				if cmp.visible() then
					cmp.select_next_item()
				elseif luasnip.expand_or_locally_jumpable() then
					luasnip.expand_or_jump()
				elseif has_words_before() then
					cmp.complete()
				else
					fallback()
				end
			end, { "i", "s" }),
			["<S-Tab>"] = cmp.mapping(function(fallback)
				if cmp.visible() then
					cmp.select_prev_item()
				elseif luasnip.jumpable(-1) then
					luasnip.jump(-1)
				else
					fallback()
				end
			end, { "i", "s" }),
		},
		sources = cmp.config.sources({
			{ name = "nvim_lsp", priority = 1000 },
			{ name = "luasnip", priority = 750 },
			{ name = "buffer", priority = 500 },
			{ name = "path", priority = 250 },
		}),
	}
end

return M