local utils = require("utils")
local lspkind = require("lspkind")
local luasnip = require("luasnip")
local cmp = require("cmp")

local has_words_before = function()
	local line, col = 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

utils.opt("o", "completeopt", "menu,menuone,noselect")

cmp.setup({
	confirm_opts = {
		behavior = cmp.ConfirmBehavior.Replace,
		select = false,
	},
	snippet = {
		expand = function(args)
			require("luasnip").lsp_expand(args.body)
		end,
	},
	window = {
		completion = cmp.config.window.bordered(),
		documentation = cmp.config.window.bordered(),
	},
	formatting = {
		format = lspkind.cmp_format({
			mode = "symbol_text",
			maxwidth = 50,
			before = function(_, vim_item)
				return vim_item
			end,
		}),
	},
	mapping = cmp.mapping.preset.insert({
		["<C-b>"] = cmp.mapping.scroll_docs(-4),
		["<C-f>"] = cmp.mapping.scroll_docs(4),
		["<C-Space>"] = cmp.mapping.complete(),
		["<C-e>"] = cmp.mapping.abort(),
		["<CR>"] = cmp.mapping.confirm({
			select = false,
		}),

		["<Tab>"] = cmp.mapping(function(fallback)
			if cmp.visible() then
				cmp.select_next_item()
			elseif luasnip.expand_or_jumpable() then
				luasnip.expand_or_jump()
			elseif has_words_before() then
				-- cmp.complete()
				fallback()
			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 = "copilot" },
		{ name = "nvim_lsp" },
		{ name = "luasnip" },
		{ name = "nvim_lsp_signature_help" },
		{ name = "nvim_lua" },
		{ name = "orgmode" },
		{ name = "path" },
		{ name = "buffer" },
	}),
})

-- Set configuration for specific filetype.
cmp.setup.filetype("gitcommit", {
	sources = cmp.config.sources({
		{ name = "cmp_git" },
	}, {
		{ name = "buffer" },
	}),
})

-- Use buffer source for `/` (if you enabled `native_menu`, this won't work anymore).
cmp.setup.cmdline({ "/", "?" }, {
	mapping = cmp.mapping.preset.cmdline(),
	sources = {
		{
			name = "buffer",
		},
	},
})

-- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
cmp.setup.cmdline(":", {
	mapping = cmp.mapping.preset.cmdline(),
	sources = cmp.config.sources({
		{
			name = "path",
		},
	}, {
		{
			name = "cmdline",
		},
	}),
})

require("cmp_git").setup()

require("copilot").setup({
	suggestion = { enabled = false },
	panel = { enabled = false },
})
require("copilot_cmp").setup()