--configure nvim-cmp for use with lsp and luasnip.

local luasnip = require 'luasnip'

-- Set completeopt to have a better completion experience
vim.o.completeopt='menu,menuone,preview,noinsert,noselect'

-- nvim-cmp setup
local cmp = require 'cmp'
cmp.setup {
    snippet = {
        expand = function(args)
            require('luasnip').lsp_expand(args.body)
        end,
    },
    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 = false,
            -- behavior = cmp.ConfirmBehavior.Replace,
            -- select = false,
        },
        ['<Tab>'] = function(fallback)
            if cmp.visible() then
                cmp.select_next_item()
            elseif luasnip.expand_or_jumpable() then
                luasnip.expand_or_jump()
            else
                fallback()
            end
        end,
        ['<S-Tab>'] = function(fallback)
            if cmp.visible() then
                cmp.select_prev_item()
            elseif luasnip.jumpable(-1) then
                luasnip.jump(-1)
            else
                fallback()
            end
        end,
    },
    sources = {
        { name = 'nvim_lsp' },
        { name = 'path' },
        { name = 'luasnip' },
        { name = 'nvim_lsp_signature_help' },
        { name = 'emoji' },
        { name = 'latex_symbols' },
        -- { name = 'buffer' },
        -- { name = 'digraphs' },
        -- { name = 'dictionary' },
        -- { name = 'spell' },
    },
}

cmp.setup.cmdline('/', {
    sources = cmp.config.sources({
        { name = 'nvim_lsp_document_symbol' },
        { name = 'treesitter' },
    }, {
        { name = 'buffer' },
        { name = 'cmdline' },
    })
})