local cmp = require("cmp")

local function border(hl_name)
    return {
        { "╭", hl_name },
        { "─", hl_name },
        { "╮", hl_name },
        { "│", hl_name },
        { "╯", hl_name },
        { "─", hl_name },
        { "╰", hl_name },
        { "│", hl_name },
    }
end

local options = {
    completion = {
        completeopt = "menu,menuone",
    },

    window = {
        completion = {
            side_padding = 1,
            scrollbar = false,
        },
        documentation = {
            border = border("CmpDocBorder"),
            winhighlight = "Normal:CmpDoc",
        },
    },
    snippet = {
        expand = function(args)
            require("luasnip").lsp_expand(args.body)
        end,
    },
    preselect = cmp.PreselectMode.None,
    mapping = {
        ["<C-p>"] = cmp.mapping.select_prev_item(),
        ["<C-n>"] = cmp.mapping.select_next_item(),
        ["<C-d>"] = cmp.mapping.scroll_docs(-4),
        ["<C-f>"] = cmp.mapping.scroll_docs(4),
        ["<C-Space>"] = cmp.mapping.complete(),
        ["<C-e>"] = cmp.mapping.close(),
        ["<CR>"] = cmp.mapping.confirm({
            behavior = cmp.ConfirmBehavior.Insert,
            select = true,
        }),
        ["<Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_next_item()
            elseif require("luasnip").expand_or_jumpable() then
                vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<Plug>luasnip-expand-or-jump", true, true, true), "")
            else
                fallback()
            end
        end, {
            "i",
            "s",
        }),
        ["<S-Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_prev_item()
            elseif require("luasnip").jumpable(-1) then
                vim.fn.feedkeys(vim.api.nvim_replace_termcodes("<Plug>luasnip-jump-prev", true, true, true), "")
            else
                fallback()
            end
        end, {
            "i",
            "s",
        }),
    },
    sources = {
        { name = "nvim_lsp" },
        { name = "luasnip" },
        { name = "buffer" },
        { name = "nvim_lua" },
        { name = "path" },
        { name = "emoji" },
    },
}

return options