local config = {
    highlights = {
        buffer_selected = { bold = true },
        diagnostic_selected = { bold = true },
        info_selected = { bold = true },
        info_diagnostic_selected = { bold = true },
        warning_selected = { bold = true },
        warning_diagnostic_selected = { bold = true },
        error_selected = { bold = true },
        error_diagnostic_selected = { bold = true },
    },
    options = {
        themeable = true,
        numbers = "none",
        diagnostics = "nvim_lsp", -- or "coc"
        max_prefix_length = 8,
        close_command = "b# | bd#",
        right_mouse_command = "b# | bd#",
        left_mouse_command = "buffer %d",
        buffer_close_icon = "󰅖",
        modified_icon = "●",
        close_icon = "",
        left_trunc_marker = "",
        right_trunc_marker = "",
        max_name_length = 18,
        truncate_names = true,
        tab_size = 18,
        color_icons = true,
        show_buffer_icons = true,
        show_buffer_close_icons = true,
        show_tab_indicators = true,
        duplicates_across_groups = true, -- whether to consider duplicate paths in different groups as duplicates
        persist_buffer_sort = true, -- whether or not custom sorted buffers should persist
        separator_style = { "▏", "" }, -- "slant" | "slope" | "thick" | "thin" | { 'any', 'any' },
        -- always_show_bufferline = false,
        auto_toggle_bufferline = true,
        show_close_icon = true,
        hover = {
            enabled = true,
            delay = 200,
            reveal = { "close" },
        },
        offsets = {
            {
                filetype = "neo-tree",
                text = "",
                highlight = "Directory",
                separator = "", -- use a "true" to enable the default, or set your own character
            },
        },
        groups = {
            options = {
                toggle_hidden_on_enter = true, -- when you re-enter a hidden group this options re-opens that group so the buffer is visible
            },
            items = {
                {
                    name = "Tests",
                    highlight = { underline = true, sp = "blue" },
                    priority = 2,
                    -- icon = " ",
                    matcher = function(buf)
                        return buf.path:match("%_test") or buf.path:match("%_spec")
                    end,
                },
                {
                    name = "Docs",
                    -- icon = "󰈙 ",
                    highlight = { undercurl = false, sp = "green" },
                    auto_close = false,
                    matcher = function(buf)
                        return buf.path:match("%.md") or buf.path:match("%.txt")
                    end,
                    separator = {
                        style = require("bufferline.groups").separator.tab,
                    },
                },
                {
                    name = "Shells",
                    highlight = { undercurl = false, sp = "grey" },
                    auto_close = false,
                    matcher = function(buf)
                        return buf.path:match("zsh")
                    end,
                    separator = {
                        style = require("bufferline.groups").separator.tab,
                    },
                },
                {
                    name = "Docker",
                    highlight = { undercurl = false, sp = "blue" },
                    auto_close = false,
                    matcher = function(buf)
                        return buf.path:match("dockerfile")
                            or buf.path:match("DOCKERFILE")
                            or buf.path:match("Dockerfile")
                            or buf.path:match("docker%-compose%.yml")
                    end,
                    separator = {
                        style = require("bufferline.groups").separator.tab,
                    },
                },
            },
        },
    },
}

return config