dots/config/nvim/init.lua

-- Bootstrap lazy.nvim
local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
if not (vim.uv or vim.loop).fs_stat(lazypath) then
  local lazyrepo = "https://github.com/folke/lazy.nvim.git"
  vim.fn.system({ "git", "clone", "--filter=blob:none", "--branch=stable", lazyrepo, lazypath })
end
vim.opt.rtp:prepend(lazypath)

-- === NIXOS HELPER (Simplified) ===
local function get_tsserver_path()
  -- 1. Try to find 'tsserver' in the current shell (direnv/nix-shell)
  local bin = vim.fn.exepath("tsserver")
  if bin == "" then 
    vim.notify("WARN: tsserver not found in PATH. Are you in a nix-shell?", vim.log.levels.WARN)
    return nil 
  end

  -- 2. Follow the Nix symlinks to find the actual .js file
  -- On NixOS, 'bin/tsserver' is a shell script wrapper. We need the .js file it points to.
  local resolved = vim.fn.resolve(bin)
  
  -- Logic: Check if the resolved path is already the js file or needs traversal
  if resolved:match("%.js$") then
    return resolved
  end

  -- Common NixOS pattern: /nix/store/.../bin/tsserver -> points near lib/node_modules
  return vim.fn.fnamemodify(resolved, ":h") .. "/../lib/node_modules/typescript/lib/tsserver.js"
end


require("lazy").setup({
  ------------------------------ UI ------------------------------
  { "catppuccin/nvim", name = "catppuccin", priority = 1000 },
  { "nvim-treesitter/nvim-treesitter", build = ":TSUpdate", opts = {} },
  "nvim-tree/nvim-web-devicons",
  { "nvim-tree/nvim-tree.lua", opts = {} },
  "romgrk/barbar.nvim",
  { "nvim-lualine/lualine.nvim", opts = {} },
  {
      'windwp/nvim-autopairs',
      event = "InsertEnter",
      opts = {}
  },
  
  -- DIRENV (Crucial for NixOS shells)
  { "direnv/direnv.vim" }, 

  ------------------------------ DIAGNOSTICS & UI ------------------------------
  {
    "folke/trouble.nvim",
    cmd = "Trouble",
    opts = {},
    keys = { { "<leader>xx", "<cmd>Trouble diagnostics toggle<cr>", desc = "Diagnostics" } },
  },
  
  {
    "rachartier/tiny-inline-diagnostic.nvim",
    event = "VeryLazy",
    priority = 1000,
    config = function()
        require("tiny-inline-diagnostic").setup()
        vim.diagnostic.config({ virtual_text = false }) 
    end,
  },

  { 
    "nvimdev/lspsaga.nvim",
    opts = {
      lightbulb = {
        enable = true,
        virtual_text = false,
        sign = true,
      }
    }
  },

  ------------------------------ COMPLETION ------------------------------
  {
    "saghen/blink.cmp",
    version = "*",
    opts = {
      keymap = { preset = "default" },
      sources = { default = { "lsp", "path", "snippets", "buffer" } },
      signature = { enabled = true } 
    },
  },

  ------------------------------ FORMATTING ------------------------------
  {
    "stevearc/conform.nvim",
    event = { "BufWritePre" },
    opts = {
      formatters_by_ft = {
        lua = { "stylua" },
        python = { "ruff_format" }, 
        javascript = { "prettierd", "prettier", stop_after_first = true },
        typescript = { "prettierd", "prettier", stop_after_first = true },
        vue = { "prettierd" },
      },
      format_on_save = { timeout_ms = 500, lsp_fallback = true },
    },
  },

  ------------------------------ SPECIALISTS ------------------------------
  { "mrcjkb/rustaceanvim", version = '^5', lazy = false },
  { "pmizio/typescript-tools.nvim", dependencies = { "nvim-lua/plenary.nvim", "neovim/nvim-lspconfig" } },
  "esmuellert/nvim-eslint",
  "neovim/nvim-lspconfig",
})

------------------------------ CONFIGURATION ------------------------------
vim.o.tabstop = 2
vim.o.shiftwidth = 2
vim.o.expandtab = true
vim.o.number = true
vim.o.signcolumn = "yes"
vim.o.cursorline = true
vim.cmd.colorscheme "catppuccin-mocha"

------------------------------ NATIVE LSP SETUP ------------------------------

local capabilities = require('blink.cmp').get_lsp_capabilities()

-- 1. TYPESCRIPT TOOLS (Specialist)
require("typescript-tools").setup({
  capabilities = capabilities,
  
  -- CRITICAL: This must be a string. If nil, the plugin defaults to internal logic.
  tsserver_path = get_tsserver_path(),

  settings = {
    -- Remove the 'tsserver_plugins' block for now. 
    -- It causes the "table at index 1" crash if the paths are wrong.
    
    tsserver_file_preferences = {
        includeCompletionsForModuleExports = true,
        quotePreference = "auto",
        importModuleSpecifierPreference = "non-relative",
    },
  },
  
  -- Only run on standard JS/TS files for now
  filetypes = { "typescript", "javascript", "javascriptreact", "typescriptreact" },
})
-- 2. ESLINT (Specialist)
require("nvim-eslint").setup({
  capabilities = capabilities,
})

-- 3. RUST (Specialist)
vim.g.rustaceanvim = {
  server = {
    capabilities = capabilities,
    default_settings = { ['rust-analyzer'] = { checkOnSave = { command = "clippy" } } }
  }
}

-- 4. GENERICS (Native Loop)
-- NOTE: "vue_ls" is the new name for Volar.
local generic_servers = { "basedpyright", "ruff", "lua_ls", "html", "svelte", "vue_ls", "nil_ls" }

for _, name in ipairs(generic_servers) do
  -- Apply caps
  vim.lsp.config(name, {
    capabilities = capabilities,
    -- NixOS Tip: This prevents Neovim from yelling if a server is missing from your shell
    on_init = function(client)
      -- Optional: logic to check if root_dir is valid
    end
  })
  
  -- Enable
  vim.lsp.enable(name)
end

vim.keymap.set({ "n", "v" }, "<leader>ca", "<cmd>Lspsaga code_action<CR>", { desc = "Code Action" })