local map, auto = core.misc.map, core.misc.auto

local function highlight(buf)
  local lang = vim.bo[buf].ft
  if table.contains({ "diff", "tex" }, lang) then
    return false
  end

  -- disable in big files
  local ok, stats = pcall(vim.uv.fs_stat,
  vim.api.nvim_buf_get_name(buf))
  if ok and stats and stats.size > (1024 * 100 * 10) --[[1MB]] then
    return false
  end

  return true
end

local function indent(buf)
  local lang = vim.bo[buf].ft
  -- disable indenting in php (it's more broken with than without)
  return not table.contains({ "php" }, lang)
end

return {
  { "nvim-treesitter/nvim-treesitter",
    branch = "main",
    config = function()
      vim.cmd("TSUpdate")
    end,
    load = function()
      local treesitter = require("nvim-treesitter")
      treesitter.setup {}
      treesitter.install({
        "c", "lua", "vim", "vimdoc", "markdown",
        "markdown_inline", "java", "bash", "css", "html", "luadoc",
        "make", "zig"
      }, {
        force = false,
        summary = false,
      })

      auto("FileType", {
        callback = function(ev)
          if highlight(ev.buf) then
            pcall(vim.treesitter.start)
            vim.bo[ev.buf].syntax = "ON"
          end
          if indent(ev.buf) then
            vim.bo[ev.buf].indentexpr = "v:lua.require('nvim-treesitter').indentexpr()"
          end
        end,
      })

      core.misc.map("n", "<leader><leader>t", function()
        treesitter.install { vim.bo[0].ft }
      end)
    end
  },

  { "Wansmer/treesj",
    disable = not vim.fn.has("nvim-0.9.0"),
    reqs = "nvim-treesitter/nvim-treesitter",
    lazy = function(load)
      load:keymap("n", "<leader>j")
      load:cmd("TSJToggle")
      load:cmd("TSJSplit")
      load:cmd("TSJJoin")
    end,
    load = function()
      require("treesj").setup {
        use_default_keymaps = false,
      }

      map("n", "<leader>j", require("treesj").toggle, { desc = "fold code" })
    end
  },
}