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

--- to highlight a buffer or not
---@param buf number buffer number
---@return boolean to_highlight
local function highlight(buf)
  local ft = vim.api.nvim_get_option_value("ft", { buf = buf })

  -- disable highlighting on big files
  local ok, stats = pcall(vim.uv.fs_stat, vim.api.nvim_buf_get_name(buf))
  if ok and stats and stats.size > (1000 * 100 * 10) --[[1MB]] then
    return false
  end

  -- fts to stop highlighting in
  if table.contains({
    "diff", "tex"
  }, ft) then
    return false
  end

  return true
end

--- to indent a buffer or not
---@param buf number buffer number
---@return boolean to_indent
local function indent(buf)
  local ft = vim.api.nvim_get_option_value("ft", { buf = buf })

  -- disable indentation on filetypes
  if not table.contains({
    "php"
  }, ft) then
    return false
  end

  return true
end

return {
  { "nvim-treesitter/nvim-treesitter",
    branch = "main",
    disable = not vim.fn.has("nvim-0.11.0"),
    config = function()
      vim.cmd("TSUpdate")
    end,
    load = function()
      local treesitter = require("nvim-treesitter")

      -- seems to not be very async despite the docs saying it is
      -- default parsers to install
      -- treesitter.install { "c", "lua", "vim", "vimdoc", "markdown",
        -- "markdown_inline", "java", "bash", "css", "html", "luadoc", "make"
      -- }

      -- enable highlighting
      auto("FileType", {
        callback = function(e)
          -- I like both treesitter and default highlighting enabled
          if highlight(e.buf) then
            -- stop errors from showing up, I don't care
            pcall(vim.treesitter.start)
            vim.bo.syntax = "on"
          end

          -- indenting
          if indent(e.buf) then
            vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
          end

          -- set the folding method
          vim.opt.foldmethod = "expr"
          vim.wo.foldexpr = 'v:lua.vim.treesitter.foldexpr()'
        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
  },

  { "windwp/nvim-ts-autotag",
    reqs = "nvim-treesitter/nvim-treesitter",
    disable = not vim.fn.has("nvim-0.9.5"),
    -- lazy = dep_short.auto({ "BufReadPre", "BufNewFile" }),
    load = function()
      require("nvim-ts-autotag").setup {}
    end
  }
}