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

--   פּ ﯟ   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 = '',
}
-- 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-k>'] = cmp.mapping.select_prev_item(),
        ['<C-j>'] = cmp.mapping.select_next_item(),
        ['<C-b>'] = cmp.mapping(cmp.mapping.scroll_docs(-1), { 'i', 'c' }),
        ['<C-f>'] = cmp.mapping(cmp.mapping.scroll_docs(1), { 'i', 'c' }),
        ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), { 'i', 'c' }),
        ['<C-y>'] = cmp.config.disable, -- Specify `cmp.config.disable` if you want to remove the default `<C-y>` mapping.
        ['<C-e>'] = cmp.mapping {
            i = cmp.mapping.abort(),
            c = cmp.mapping.close(),
        },
        -- Accept currently selected item. If none selected, `select` first item.
        -- Set `select` to `false` to only confirm explicitly selected items.
        ['<CR>'] = cmp.mapping.confirm { select = true },
        ['<Tab>'] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_next_item()
            elseif luasnip.expandable() then
                luasnip.expand()
            elseif luasnip.expand_or_jumpable() then
                luasnip.expand_or_jump()
            elseif check_backspace() then
                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',
        }),
    },
    formatting = {
        fields = { 'kind', 'abbr', 'menu' },
        format = function(entry, vim_item)
            -- Kind icons
            vim_item.kind = string.format('%s', kind_icons[vim_item.kind])
            -- vim_item.kind = string.format('%s %s', kind_icons[vim_item.kind], vim_item.kind) -- This concatonates the icons with the name of the item kind
            vim_item.menu = ({
                nvim_lsp = '[LSP]',
                luasnip = '[Snippet]',
                buffer = '[Buffer]',
                path = '[Path]',
            })[entry.source.name]
            return vim_item
        end,
    },
    sources = {
        { name = 'nvim_lsp' },
        { name = 'luasnip' },
        { name = 'buffer' },
        { name = 'path' },
    },
    confirm_opts = {
        behavior = cmp.ConfirmBehavior.Replace,
        select = false,
    },
    window = {
        documentation = {
            border = { '╭', '─', '╮', '│', '╯', '─', '╰', '│' },
        },
    },
    experimental = {
        ghost_text = false,
        native_menu = false,
    },
}