vim.g.mapleader = " "
vim.g.localleader = "\\"

require('plugins')
require('vars')
require('opts')
require('fns')
require('keys')
require('theme')
require('statusline')

local lspconfig = require("lspconfig")
local rust_tools = require("rust-tools")

-- Mason Setup
require("mason").setup({
    ui = {
        icons = {
            package_installed = "",
            package_pending = "",
            package_uninstalled = "",
        },
    },
    ensure_installed = { "pylsp", "rust_analyzer" },
})
require("mason-lspconfig").setup()
lspconfig.pylsp.setup {}
lspconfig.rust_analyzer.setup {}

require("auto-save").setup({
  enabled = false
})

require("todo-comments").setup()


rust_tools.setup({
  server = {
    on_attach = function(_, bufnr)
      -- Hover actions
      vim.keymap.set("n", "<C-space>", rust_tools.hover_actions.hover_actions, { buffer = bufnr })
      -- Code action groups
      vim.keymap.set("n", "<Leader>a", rust_tools.code_action_group.code_action_group, { buffer = bufnr })
    end,
    settings = {
      ["rust-analyzer"] = {},
    }
  },
})

-- Format file on save
vim.cmd [[autocmd BufWritePre * lua vim.lsp.buf.format()]]

-- Completion Plugin Setup
local cmp = require'cmp'
cmp.setup({
  -- Enable LSP snippets
  snippet = {
    expand = function(args)
        vim.fn["vsnip#anonymous"](args.body)
    end,
  },
  mapping = {
    ['<C-p>'] = cmp.mapping.select_prev_item(),
    ['<C-n>'] = cmp.mapping.select_next_item(),
    -- Add tab support
    ['<S-Tab>'] = cmp.mapping.select_prev_item(),
    ['<Tab>'] = cmp.mapping.select_next_item(),
    ['<C-S-f>'] = 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 = true,
    })
  },
  -- Installed sources:
  sources = {
    { name = 'path' },                              -- file paths
    { name = 'nvim_lsp', keyword_length = 3 },      -- from language server
    { name = 'nvim_lsp_signature_help'},            -- display function signatures with current parameter emphasized
    { name = 'nvim_lua', keyword_length = 2 },       -- complete neovim's Lua runtime API such vim.lsp.*
    { name = 'buffer', keyword_length = 2 },        -- source current buffer
    { name = 'vsnip', keyword_length = 2 },         -- nvim-cmp source for vim-vsnip 
    { name = 'calc'},                               -- source for math calculation
  },
  window = {
      completion = cmp.config.window.bordered(),
      documentation = cmp.config.window.bordered(),
  },
  formatting = {
      fields = {'menu', 'abbr', 'kind'},
      format = function(entry, item)
          local menu_icon ={
              nvim_lsp = 'λ',
              vsnip = '⋗',
              buffer = 'Ω',
              path = '🖫',
          }
          item.menu = menu_icon[entry.source.name]
          return item
      end,
  },
})


-- Treesitter Plugin Setup 
require('nvim-treesitter.configs').setup {
  ensure_installed = { "lua", "rust", "toml" },
  auto_install = true,
  highlight = {
    enable = true,
    additional_vim_regex_highlighting=false,
  },
  ident = { enable = true }, 
  rainbow = {
    enable = true,
    extended_mode = true,
    max_file_lines = nil,
  }
}