vim.g.mapleader = " "
vim.g.maplocalleader = " "

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

-- 2. Plugins
require("lazy").setup({
  { "catppuccin/nvim", name = "catppuccin", priority = 1000 },
  { "nvim-telescope/telescope.nvim", dependencies = { "nvim-lua/plenary.nvim" } },
  { "neovim/nvim-lspconfig" }, 
  { "folke/which-key.nvim", event = "VeryLazy" },
  { "nvim-tree/nvim-tree.lua", dependencies = { "nvim-tree/nvim-web-devicons" } },

  -- [NEW] Autocomplete & Snippets
  {
    "hrsh7th/nvim-cmp",
    dependencies = {
      "hrsh7th/cmp-nvim-lsp", -- Connects LSP to completion
      "L3MON4D3/LuaSnip",     -- Snippet engine (Required for arguments)
      "saadparwaiz1/cmp_luasnip",
    },
  },

  {
  'akinsho/toggleterm.nvim',
  version = "*",
  config = function()
    require("toggleterm").setup({
      size = 20,
      open_mapping = [[<C-q>]], -- This sets the trigger
      direction = 'float',          -- This makes it floating
      float_opts = {
        border = 'curved',          -- Options: 'single', 'double', 'shadow', 'curved'
      },
    })
  end
}
})

-- 3. Theme & Settings
vim.cmd.colorscheme "catppuccin-mocha"
vim.opt.number = true
vim.opt.relativenumber = true

-- 4. Tree Setup (Small & Minimal)
require("nvim-tree").setup({
  view = { width = 30, side = "left" },
  filters = { dotfiles = false, custom = { ".git", "zig-cache", "zig-out" } },
})

-- 5. Autocomplete Setup
local cmp = require('cmp')
local luasnip = require('luasnip')

-- This is the "secret sauce" that tells ZLS your editor can handle 
-- the advanced "return ." and "self." completion data.
local capabilities = require('cmp_nvim_lsp').default_capabilities()

cmp.setup({
  snippet = {
    expand = function(args) luasnip.lsp_expand(args.body) end,
  },
  completion = {
    autocomplete = { cmp.TriggerEvent.TextChanged },
    keyword_length = 1, 
  },
  mapping = cmp.mapping.preset.insert({
    ['<CR>'] = cmp.mapping.confirm({ 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 = cmp.config.sources({
    { name = 'nvim_lsp' },
    { name = 'luasnip' },
  }),
  window = {
    completion = cmp.config.window.bordered(),
    documentation = cmp.config.window.bordered(),
  },
})

-- 6. Modern LSP Setup (Neovim 0.11 native)
-- We define the config, then enable it.
vim.lsp.enable('zls')
vim.lsp.config('zls', {
  cmd = { 'zls' },
  filetypes = { 'zig', 'zir' },
  root_markers = { 'build.zig', '.git' },
  -- Pass the capabilities and ZLS-specific settings here:
  capabilities = capabilities,
  settings = {
    zls = {
      enable_snippets = true,
      enable_argument_placeholders = true,
      operator_completions = true,
      enable_autofix = true,
    },
  },
})

-- 7. Auto-format on Save
vim.api.nvim_create_autocmd("BufWritePre", {
  pattern = "*.zig",
  callback = function() vim.lsp.buf.format() end,
})

require("keymaps")