local on_windows = vim.loop.os_uname().version:match "Windows"

local function join_paths(...)
    local path_sep = on_windows and "\\" or "/"
    local result = table.concat({ ... }, path_sep)
    return result
end

vim.cmd [[set runtimepath=$VIMRUNTIME]]

local temp_dir = vim.loop.os_getenv "TEMP" or "/tmp"

vim.opt.packpath = join_paths(temp_dir, "nvim", "site")

local package_root = join_paths(temp_dir, "nvim", "site", "pack")
local install_path = join_paths(package_root, "packer", "start", "packer.nvim")
local compile_path = join_paths(install_path, "plugin", "packer_compiled.lua")

local function load_plugins()
    require("packer").startup {
        {
            "wbthomason/packer.nvim",
            "neovim/nvim-lspconfig",
            "williamboman/nvim-lsp-installer",
        },
        config = {
            package_root = package_root,
            compile_path = compile_path,
        },
    }
end

function _G.load_config()
    -- ==================================================
    -- ======= MODIFY YOUR CONFIG HERE, IF NEEDED =======
    -- ==================================================
    local lsp_installer = require "nvim-lsp-installer"

    require("nvim-lsp-installer").settings {
        log = vim.log.levels.DEBUG,
    }

    lsp_installer.on_server_ready(function(server)
        server:setup {}
    end)
    -- ==================================================
end

if vim.fn.isdirectory(install_path) == 0 then
    vim.fn.system { "git", "clone", "https://github.com/wbthomason/packer.nvim", install_path }
    load_plugins()
    require("packer").sync()
    vim.cmd [[autocmd User PackerComplete ++once lua load_config()]]
else
    load_plugins()
    require("packer").sync()
    _G.load_config()
end