local cmp_status_ok, cmp = pcall(require, "cmp")
if not cmp_status_ok then
    return
end

local snip_status_ok, luasnip = pcall(require, "luasnip")
if not snip_status_ok then
    return
end
require("luasnip/loaders/from_vscode").lazy_load()

local check_backspace = function()
    local col = vim.fn.col(".") - 1
    return col == 0 or vim.fn.getline("."):sub(col, col):match("%s")
end

local lspkind_status_ok, lspkind = pcall(require, "lspkind")
if not lspkind_status_ok then
    return
end

-- 󰃐 󰆩 󰙅 󰛡  󰅲 some other good icons
local kind_icons = {
    Text = "󰉿",
    Method = "m",
    Function = "󰊕",
    Constructor = "",
    Field = "",
    Variable = "󰆧",
    Class = "󰌗",
    Interface = "",
    Module = "",
    Property = "",
    Unit = "",
    Value = "󰎠",
    Enum = "",
    Keyword = "󰌋",
    Snippet = "",
    Color = "󰏘",
    File = "󰈙",
    Reference = "",
    Folder = "󰉋",
    EnumMember = "",
    Constant = "󰇽",
    Struct = "",
    Event = "",
    Operator = "󰆕",
    TypeParameter = "󰊄",
    Copilot = "",
    DB = "󰆼",
}
-- find more here: https://www.nerdfonts.com/cheat-sheet

cmp.setup({
    snippet = {
        expand = function(args)
            luasnip.lsp_expand(args.body) -- For `luasnip` users.
        end,
    },
    mapping = {
        ["<C-n>"] = cmp.mapping.select_next_item({ behavior = cmp.SelectBehavior.Insert }),
        ["<C-p>"] = cmp.mapping.select_prev_item({ behavior = cmp.SelectBehavior.Insert }),
        ["<C-u>"] = cmp.mapping.scroll_docs(-4),
        ["<C-d>"] = cmp.mapping.scroll_docs(4),
        ["<C-e>"] = cmp.mapping.abort(),
        ["<C-y>"] = cmp.mapping(
            cmp.mapping.confirm({
                behavior = cmp.ConfirmBehavior.Insert,
                select = true,
            }),
            { "i", "c" }
        ),
        ["<C-Space>"] = cmp.mapping(cmp.mapping.complete(), { "i", "c" }),
        -- Accept currently selected item. If none selected, do nothing.
        ["<C-k>"] = cmp.mapping(function(fallback)
            if luasnip.expandable() then
                luasnip.expand()
            elseif luasnip.expand_or_jumpable() then
                luasnip.expand_or_jump()
            elseif check_backspace() then
                fallback()
            else
                fallback()
            end
        end),
        ["<C-j>"] = cmp.mapping(function(fallback)
            if luasnip.jumpable(-1) then
                luasnip.jump(-1)
            else
                fallback()
            end
        end),
    },
    formatting = {
        fields = { "kind", "abbr", "menu" },
        format = lspkind.cmp_format({
            mode = "symbol_text", -- show only symbol annotations
            maxwidth = 50,        -- prevent the popup from showing more than provided characters (e.g 50 will not show more than 50 characters)
            -- can also be a function to dynamically calculate max width such as
            -- maxwidth = function() return math.floor(0.45 * vim.o.columns) end,
            ellipsis_char = "...",    -- when popup menu exceed maxwidth, the truncated part would show ellipsis_char instead (must define maxwidth first)
            show_labelDetails = true, -- show labelDetails in menu. Disabled by default

            -- The function below will be called before any actual modifications from lspkind
            -- so that you can provide more controls on popup customization. (See [#30](https://github.com/onsails/lspkind-nvim/pull/30))
            before = function(entry, vim_item)
                vim_item.menu = ({
                    nvim_lsp = "[LSP]",
                    nvim_lua = "[LSP]",
                    path = "[Path]",
                })[entry.source.name]
                return vim_item
            end,
        }),
    },
    sorting = {
        comparators = {
            cmp.config.compare.exact,
            cmp.config.compare.offset,
            cmp.config.compare.recently_used,

            --Make entries that start with underline appear after
            function(entry1, entry2)
                local _, entry1_under = entry1.completion_item.label:find("^_+")
                local _, entry2_under = entry2.completion_item.label:find("^_+")
                entry1_under = entry1_under or 0
                entry2_under = entry2_under or 0
                if entry1_under > entry2_under then
                    return false
                elseif entry1_under < entry2_under then
                    return true
                end
            end,
        },
    },
    sources = cmp.config.sources({
        { name = "nvim_lsp" },
        { name = "nvim_lua" },
        { name = "luasnip" },
        { name = "path" },
    }, {
        { name = "buffer", keyword_length = 5 },
    }),
})

local cmp_autopairs = require("nvim-autopairs.completion.cmp")
cmp.event:on("confirm_done", cmp_autopairs.on_confirm_done())