-- Add additional capabilities supported by nvim-cmp
local capabilities = require("cmp_nvim_lsp").default_capabilities()

local lspconfig = require "lspconfig"

-- Enable language servers with the additional completion capabilities
-- offered by nvim-cmp
local servers = {
    "ansiblels",
    "esbonio",
    "gopls",
    "pyright",
    "rust_analyzer",
    "texlab",
}
for _, lsp in ipairs(servers) do
    lspconfig[lsp].setup({
        -- on_attach = my_custom_on_attach,
        capabilities = capabilities,
    })
end

-- luasnip setup
local luasnip = require "luasnip"

-- nvim-cmp setup
local cmp = require "cmp"
cmp.setup({
    snippet = {
        expand = function(args)
            luasnip.lsp_expand(args.body)
        end,
    },
    mapping = cmp.mapping.preset.insert({
        ["<C-u>"] = cmp.mapping.scroll_docs(-4), -- Up
        ["<C-d>"] = cmp.mapping.scroll_docs(4), -- Down
        -- C-b (back) C-f (forward) for snippet placeholder navigation.
        ["<C-Space>"] = cmp.mapping.complete(),
        ["<CR>"] = cmp.mapping.confirm({
            behavior = cmp.ConfirmBehavior.Replace,
            select = true,
        }),
        ["<Tab>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_next_item()
            elseif luasnip.expand_or_jumpable() then
                luasnip.expand_or_jump()
            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" }),
    }),
    sources = {
        { name = "nvim_lsp" },
        { name = "nvim_lua" },
        { name = "luasnip" },
        {
            name = "buffer",
            option = {
                keyword_pattern = [[\k\+]],
                -- Use all buffers to complete.
                get_bufnrs = function()
                    return vim.api.nvim_list_bufs()
                end,
            },
        },
        { name = "path" },
    },
})