-- Performant, batteries-included completion plugin for Neovim.
-- https://github.com/Saghen/blink.cmp
return {
	"blink.cmp",
	event = "InsertEnter",
	load = function(name)
		vim.cmd.packadd(name)
		vim.cmd.packadd("blink-emoji.nvim")
	end,
	after = function()
		require("blink-cmp").setup({
			-- Enables keymaps, completions and signature help when true (doesn't apply to cmdline or term)
			--
			-- If the function returns 'force', the default conditions for disabling the plugin will be ignored
			-- Default conditions: (vim.bo.buftype ~= 'prompt' and vim.b.completion ~= false)
			-- Note that the default conditions are ignored when `vim.b.completion` is explicitly set to `true`
			--
			-- Exceptions: vim.bo.filetype == 'dap-repl'
			--enabled = function()
			--	return not vim.tbl_contains({ "lua", "markdown" }, vim.bo.filetype)
			--end,

			-- Disable cmdline
			-- cmdline = { enabled = false },

			fuzzy = {
				-- ToDo: re-enable after the fix https://github.com/Saghen/blink.cmp/issues/1743
				--implementation = "prefer_rust_with_warning",
				implementation = "lua",
				sorts = {
					"score", -- Primary sort: by fuzzy matching score
					"sort_text", -- Secondary sort: by sortText field if scores are equal
					"label", -- Tertiary sort: by label if still tied
				},
			},

			completion = {
				-- 'prefix' will fuzzy match on the text before the cursor
				-- 'full' will fuzzy match on the text before _and_ after the cursor
				-- example: 'foo_|_bar' will match 'foo_' for 'prefix' and 'foo__bar' for 'full'
				keyword = { range = "prefix" },
				trigger = {
					--show_on_backspace = true,
					--show_on_backspace_in_keyword = true,
				},

				-- Disable auto brackets
				-- NOTE: some LSPs may add auto brackets themselves anyway
				accept = { auto_brackets = { enabled = false } },
				list = {
					selection = {
						preselect = true,
						auto_insert = true,
					},
				},
				-- or set via a function
				--list = {
				--	selection = {
				--		preselect = function(ctx)
				--			return vim.bo.filetype ~= "markdown"
				--		end,
				--	},
				--},

				menu = {
					auto_show = true,

					-- nvim-cmp style menu
					--draw = {
					--	columns = {
					--		{ "label", "label_description", gap = 1 },
					--		{ "kind_icon", "kind" },
					--	},
					--},
				},

				-- Show documentation when selecting a completion item
				documentation = { auto_show = true, auto_show_delay_ms = 2000 },

				-- Whether to display a preview of the selected item on the current line
				ghost_text = { enabled = true },
			},
			keymap = {
				-- set to 'none' to disable the 'default' preset
				preset = "none",

				["<C-space>"] = { "show", "show_documentation", "hide_documentation" },
				["<C-e>"] = { "hide", "fallback" },
				--["<Tab>"] = { "select_next" },
				--["<S-Tab>"] = { "select_prev" },
				--["<Tab>"] = { "show_and_insert_or_accept_single" },
				["<Tab>"] = { "accept", "fallback" },

				--["<Tab>"] = { "snippet_forward", "fallback" },
				--["<S-Tab>"] = { "snippet_backward", "fallback" },

				["<Up>"] = { "select_prev", "fallback" },
				["<Down>"] = { "select_next", "fallback" },
				["<C-i>"] = { "select_prev", "fallback_to_mappings" },
				["<C-k>"] = { "select_next", "fallback_to_mappings" },

				["<C-j>"] = { "scroll_documentation_up", "fallback" },
				["<C-l>"] = { "scroll_documentation_down", "fallback" },

				["<C-n>"] = { "show_signature", "hide_signature", "fallback" },
			},

			sources = {
				-- Remove 'buffer' if you don't want text completions,
				-- by default it's only enabled when LSP returns no items
				default = { "path", "lsp", "snippets", "buffer", "emoji" },
				providers = {

					-- Always show the buffer source even when the LSP provides some completion
					lsp = { fallbacks = {} },
					buffer = {
						score_offset = -3,
						opts = {
							get_bufnrs = function()
								return vim.api.nvim_list_bufs()
							end,
							-- from all "normal" buffers
							-- get_bufnrs = function()
							-- 	return vim.tbl_filter(function(bufnr)
							-- 		return vim.bo[bufnr].buftype == ""
							-- 	end, vim.api.nvim_list_bufs())
							-- end,
							-- buffers when searching with `/` or `?`
							get_search_bufnrs = function()
								return { vim.api.nvim_get_current_buf() }
							end,
							retention_order = { "focused", "visible", "recency", "largest" },
							use_cache = true,
							enable_in_ex_commands = false,
						},
					},
					emoji = {
						module = "blink-emoji",
						name = "Emoji",
						score_offset = 15, -- Tune by preference
						opts = {
							insert = true, -- Insert emoji (default) or complete its name
							---@type string|table|fun():table
							trigger = function()
								return { ":" }
							end,
						},
						should_show_items = function()
							return vim.tbl_contains(
								-- Enable emoji completion only for git commits and markdown.
								-- By default, enabled for all file-types.
								{ "gitcommit", "markdown", "jj" },
								vim.o.filetype
							)
						end,
					},
					path = {
						opts = {
							-- 	get_cwd = function(_)
							-- 		return vim.fn.getcwd()
							-- 	end,
						},
					},
				},
			},

			-- Use a preset for snippets, check the snippets documentation for more information
			snippets = { preset = "default" }, -- | "luasnip" | "mini_snippets" | "vsnip"

			-- Experimental signature help support
			signature = { enabled = true },
		})
	end,
}