local misc = require('core.misc')
local map = misc.map

return { 'L3MON4D3/LuaSnip',
  branch = 'v2.3.0',
  disable = vim.version().minor < 7,
  config = function()
    vim.cmd.make('install_jsregexp')
  end,
  function()
    local luasnip = require('luasnip')
    local types = require("luasnip.util.types")

    luasnip.config.set_config {
      history = true, -- return back into snippet

      -- update on text insert and cursor hold
      updateevents = { "TextChanged", "TextChangedI", "CursorHold" },
      ext_opts = {
        [types.choiceNode] = {
          active = {
            virt_text = {{ "●", "@boolean" }}
          }
        },
        [types.insertNode] = {
          active = {
            virt_text = {{ "●", "@constant" }}
          }
        },
      },
    }

    map({"i", "s"}, "<c-a>", function()
      if luasnip.choice_active() then
        luasnip.change_choice(1)
      end
    end)

    map({"i", "s"}, "<c-e>", function()
      if luasnip.expandable() then
        luasnip.expand()
      end
    end)

    map({"i", "s"}, "<C-j>", function()
      if luasnip.jumpable(1) then
        luasnip.jump(1)
      end
    end)

    map({"i", "s"}, "<C-k>", function()
      if luasnip.jumpable(-1) then
        luasnip.jump(-1)
      end
    end)

    -- load all snippets from snippet directory
    for _, file in ipairs(vim.api.nvim_get_runtime_file("lua/snippets/*.lua", true)) do
      local fn = file:gsub('^.*/', ''):gsub('%.lua$', '')
      local ret = misc.include('snippets.'..fn)
      if type(ret) ~= "boolean" then
        luasnip.add_snippets(fn, ret, { key = fn })
      end
    end
  end
}