-- https://github.com/nvim-treesitter/nvim-treesitter/blob/main/doc/nvim-treesitter.txt
local treesitter_languages = require("config.treesitter").languages

local function enable_treesitter_features()
  if not pcall(vim.treesitter.start) then return end

  vim.wo.foldmethod = "expr"
  vim.wo.foldexpr = "v:lua.vim.treesitter.foldexpr()"
  vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
end

vim.api.nvim_create_autocmd("FileType", {
  pattern = treesitter_languages,
  callback = enable_treesitter_features,
})

-- https://github.com/nvim-tree/nvim-tree.lua/wiki/Auto-Close
vim.api.nvim_create_autocmd("QuitPre", {
  callback = function()
    local invalid_win = {}
    local wins = vim.api.nvim_list_wins()

    for _, w in ipairs(wins) do
      local bufname = vim.api.nvim_buf_get_name(vim.api.nvim_win_get_buf(w))
      if bufname:match("NvimTree_") ~= nil then table.insert(invalid_win, w) end
    end

    if #invalid_win == #wins - 1 then
      -- Should quit, so we close all invalid windows.
      for _, w in ipairs(invalid_win) do
        vim.api.nvim_win_close(w, true)
      end
    end
  end,
})

vim.api.nvim_create_autocmd("LspAttach", {
  callback = function(event)
    local client = vim.lsp.get_client_by_id(event.data.client_id)
    local keymaps = require("config.keymaps")
    keymaps.lsp(event.buf, client)
  end,
})